feat: lifetime elision, tooling CI, registry, and LSP locals

Ship the QUALITY_PLAN stretch from ownership through ecosystem: C.1
lifetime elision (bootstrap + selfhost), bux fmt/test/doc CI hooks,
stdlib goldens, package registry (bux search/add), and LSP 0.4
position-sensitive locals with inferred let types. Full-tree format
pass plus Map/Set remove double-free fix.

Makefile

@@ -3,9 +3,9 @@ SRC := bootstrap/main.nim
 OUT := buxc
 BUILD_DIR := build
 
-EXAMPLES := hello fibonacci factorial structs enums methods algebraic_enums generics generics_struct generic_infer generic_infer2 extend_generic pattern_matching strings strings2 map result_option try_operator ownership ownership_checked drop_early_return ctfe async concurrency os_time process json iter trait_bounds channel sync jwt stdlib_ergonomics tuples func_ptr map_remove array_iter_extra string_extra multi_closure iter_hof closure_control match_let string_interp iter_generic generic_infer_hof struct_tuple_pat match_block nested_patterns match_guards pattern_shadow
+EXAMPLES := hello fibonacci factorial structs enums methods algebraic_enums generics generics_struct generic_infer generic_infer2 extend_generic pattern_matching strings strings2 map result_option try_operator ownership ownership_checked drop_early_return lifetime_elision ctfe async concurrency os_time process json iter trait_bounds channel sync jwt stdlib_ergonomics tuples func_ptr map_remove array_iter_extra string_extra multi_closure iter_hof closure_control match_let string_interp iter_generic generic_infer_hof struct_tuple_pat match_block nested_patterns match_guards pattern_shadow
 
-.PHONY: all build dev debug test clean clean-all test-examples selfhost test-golden test-errors selfhost-loop lsp
+.PHONY: all build dev debug test clean clean-all test-examples selfhost test-golden test-errors test-stdlib selfhost-loop lsp fmt-check docs
 
 all: build
 
@@ -19,7 +19,7 @@ dev:
 debug: dev
 	@echo "Debug binary: buxc_debug"
 
-test: build test-examples test-errors
+test: build fmt-check test-examples test-errors test-stdlib
 	@echo "Running lexer tests..."
 	$(NIM) c -r tests/lexer_test.nim
 	@echo "Running parser tests..."
@@ -105,6 +105,43 @@ test-errors: build
 	@chmod +x tests/error_golden/run.sh
 	@tests/error_golden/run.sh ./$(OUT)
 
+test-stdlib: build
+	@echo "=== Stdlib golden tests ==="
+	@chmod +x tests/stdlib_golden/run.sh
+	@tests/stdlib_golden/run.sh ./$(OUT)
+
+# Generate stdlib API docs from /// comments → docs/api/stdlib.md
+docs: build
+	@mkdir -p docs/api
+	@./$(OUT) doc --out docs/api/stdlib.md lib/
+	@echo "docs/api/stdlib.md updated"
+
+# CI: full-tree format check (lib / examples / src / tests / apps) + dirty-path smoke.
+fmt-check: build
+	@echo "=== fmt --check (full tree) ==="
+	@./$(OUT) fmt --check lib/
+	@./$(OUT) fmt --check examples/
+	@./$(OUT) fmt --check src/
+	@./$(OUT) fmt --check tests/
+	@./$(OUT) fmt --check apps/
+	@echo "=== fmt --check dirty-path smoke ==="
+	@mkdir -p /tmp/bux_fmt_smoke
+	@printf 'func Main() -> int {\nreturn 0;\n}\n' > /tmp/bux_fmt_smoke/bad.bux
+	@if ./$(OUT) fmt --check /tmp/bux_fmt_smoke/bad.bux >/dev/null 2>&1; then \
+		echo "error: expected --check to fail on dirty file"; exit 1; \
+	fi
+	@echo "fmt --check passed (tree clean + dirty exits 1)"
+
+# One-shot reformat of the same trees (run before committing style-only fixes)
+.PHONY: fmt
+fmt: build
+	@./$(OUT) fmt lib/
+	@./$(OUT) fmt examples/
+	@./$(OUT) fmt src/
+	@./$(OUT) fmt tests/
+	@./$(OUT) fmt apps/
+	@echo "Formatted lib/ examples/ src/ tests/ apps/"
+
 selfhost-loop: build
 	@echo "=== Selfhost loop: bootstrap determinism check ==="
 	@echo "Build A..."
@@ -145,3 +182,17 @@ lsp: tools/bux-lsp
 
 tools/bux-lsp: tools/lsp_server.nim bootstrap/*.nim
 	cd tools && $(NIM) c -d:release --opt:size --path:../bootstrap -o:bux-lsp lsp_server.nim
+
+.PHONY: test-lsp
+test-lsp: lsp
+	@echo "=== LSP unit (locals / inference) ==="
+	$(NIM) r --path:bootstrap tools/test_lsp_locals.nim
+	@echo "=== LSP hover smoke ==="
+	@chmod +x tools/smoke_lsp_hover.sh
+	@tools/smoke_lsp_hover.sh
+
+.PHONY: test-registry
+test-registry: build
+	@echo "=== Registry smoke (E.1) ==="
+	@chmod +x tools/smoke_registry.sh
+	@tools/smoke_registry.sh

PLAN.md

@@ -432,7 +432,7 @@ func ReadFile(path: String) -> Result<String, IoError> {
 | `8.2.1` `own` keyword | ✅ | `own T` parsed and resolves to `T`; ready for borrow checker integration |
 | `8.2.2` `borrow` / `&` | ✅ | `&T` shared reference type checked and enforced |
 | `8.2.3` `mut` references | ✅ | `&mut T` mutable reference type checked and enforced |
-| `8.2.4` Lifetime elision | ⏳ | Simple rules for common cases; explicit `'a` for complex |
+| `8.2.4` Lifetime elision | ✅ | Single-input elision + dangling return; explicit `'a` for multi-input |
 | `8.2.5` Opt-in checker | ✅ | `@[Checked]` attribute enables borrow checking: writes through `&T` are rejected |
 
 ```bux
@@ -681,8 +681,8 @@ buxc2 == buxc3            ✅ (binary-identical)
 | `10.2.3` `&mut T` exclusive mutable check | ✅ | No aliasing of mutable refs |
 | `10.2.4` Bounds checking on slices | ✅ | `Slice_Get` / `Array_Get` with `bux_bounds_check` |
 | `10.2.5` `@[Release]` zero-cost mode | ✅ | Disables borrow + bounds checks, passes `-O3 -flto` |
-| `10.2.6` Lifetime elision (simple rules) | ⏳ | 80% of cases without annotations |
-| `10.2.7` Explicit lifetimes `'a` | ⏳ | Only for complex cases |
+| `10.2.6` Lifetime elision (simple rules) | ✅ | Single-input elision; multi-input requires `'a` |
+| `10.2.7` Explicit lifetimes `'a` | ✅ | Parsed + checked; multi-input + mismatch |
 
 ### 10.3 — Compiler Architecture Upgrade (v0.6.0 target)
 

README.md

@@ -246,7 +246,7 @@ func Main() -> int {
 | **Package Manager** | `bux add`, `bux install`, `bux.lock`, path + git deps |
 | **Cross-Compilation** | `--target <triple>` via clang (e.g. `aarch64-linux-gnu`) |
 | **Diagnostics** | Rust-style snippets, multi-char underlines, `= help:` hints |
-| **Tooling** | `bux new/build/run/test/check/fmt`, LSP (`tools/lsp_server.nim` + `buxc check`) |
+| **Tooling** | `bux new/build/run/test/check/fmt/doc`, LSP 0.4.0 (locals + inferred lets) |
 
 ---
 
@@ -299,6 +299,8 @@ bux/
 | [`docs/Stdlib.md`](docs/Stdlib.md) | Standard library API |
 | [`docs/BuildAndTest.md`](docs/BuildAndTest.md) | Build, test, and tooling |
 | [`docs/QUALITY_PLAN.md`](docs/QUALITY_PLAN.md) | Roadmap toward a “good” v1.0 |
+| [`docs/Packages.md`](docs/Packages.md) | Package manager + registry |
+| [`docs/SEMVER.md`](docs/SEMVER.md) | Versioning policy |
 | [`docs/ROADMAP.md`](docs/ROADMAP.md) | Feature status (constructs) |
 | [`PLAN.md`](PLAN.md) | Long-form phase plan |
 
@@ -319,14 +321,33 @@ make test-errors
 # Full unit + example suite
 make test
 
+# Full-tree format check (lib/ examples/ src/ tests/ apps/)
+make fmt-check
+# Reformat those trees
+make fmt
+
+# Stdlib behavioral goldens (Array / String / collections)
+make test-stdlib
+
+# Generate stdlib API docs from /// comments
+make docs
+
 # Build self-hosted compiler (Bux → C → native)
 make selfhost
 
-# Run all tests
-make test
+# Package tests (filter + summary table)
+./buxc test --filter first _test_runner
 
-# Run example programs
-make test-examples
+# Format / CI format check
+./buxc fmt path/to/file.bux
+./buxc fmt --check path/
+
+# API docs
+./buxc doc --out docs/api/stdlib.md lib/
+
+# Package registry
+./buxc search greet
+make test-registry          # add greet → install → build temp app
 
 # Verify selfhost binary parity (buxc2 → buxc3, identical)
 make selfhost-loop

apps/boko-framework/src/Boko.bux

@@ -5,143 +5,143 @@
 // =============================================================================
 module Boko {
 
-import Std::Io::{PrintLine, Print, PrintInt};
-import Std::Net::{Net_Create, Net_SetReuse, Net_Bind, Net_Listen, Net_Accept, Net_Send, Net_Recv, Net_Close, Net_LastError};
-import Std::String::{
-    String_Len, String_Eq, String_IsNull,
-    String_StartsWith, String_Contains,
-    String_Find, String_Offset, String_Slice,
-    String_SplitCount, String_SplitPart,
-    StringBuilder, StringBuilder_New, StringBuilder_Append,
-    StringBuilder_AppendInt, StringBuilder_Build, StringBuilder_Free
-};
-import Std::Map::{StringMap, StringMap_New, StringMap_Set, StringMap_Get, StringMap_Has};
+    import Std::Io::{PrintLine, Print, PrintInt};
+    import Std::Net::{Net_Create, Net_SetReuse, Net_Bind, Net_Listen, Net_Accept, Net_Send, Net_Recv, Net_Close, Net_LastError};
+    import Std::String::{
+        String_Len, String_Eq, String_IsNull,
+        String_StartsWith, String_Contains,
+        String_Find, String_Offset, String_Slice,
+        String_SplitCount, String_SplitPart,
+        StringBuilder, StringBuilder_New, StringBuilder_Append,
+        StringBuilder_AppendInt, StringBuilder_Build, StringBuilder_Free
+    };
+    import Std::Map::{StringMap, StringMap_New, StringMap_Set, StringMap_Get, StringMap_Has};
 
 
-// =============================================================================
-// HTTP Methods
-// =============================================================================
-enum HttpVerb {
-    GET,
-    POST,
-    PUT,
-    DELETE,
-    PATCH,
-    HEAD,
-    OPTIONS,
-}
+    // =============================================================================
+    // HTTP Methods
+    // =============================================================================
+    enum HttpVerb {
+        GET,
+        POST,
+        PUT,
+        DELETE,
+        PATCH,
+        HEAD,
+        OPTIONS,
+    }
 
-func HttpVerb_MethodName(verb: HttpVerb) -> String {
-    if verb.tag == HttpVerb_GET     { return "GET"; }
-    if verb.tag == HttpVerb_POST    { return "POST"; }
-    if verb.tag == HttpVerb_PUT     { return "PUT"; }
-    if verb.tag == HttpVerb_DELETE  { return "DELETE"; }
-    if verb.tag == HttpVerb_PATCH   { return "PATCH"; }
-    if verb.tag == HttpVerb_HEAD    { return "HEAD"; }
-    if verb.tag == HttpVerb_OPTIONS { return "OPTIONS"; }
-    return "?";
-}
+    func HttpVerb_MethodName(verb: HttpVerb) -> String {
+        if verb.tag == HttpVerb_GET     { return "GET"; }
+        if verb.tag == HttpVerb_POST    { return "POST"; }
+        if verb.tag == HttpVerb_PUT     { return "PUT"; }
+        if verb.tag == HttpVerb_DELETE  { return "DELETE"; }
+        if verb.tag == HttpVerb_PATCH   { return "PATCH"; }
+        if verb.tag == HttpVerb_HEAD    { return "HEAD"; }
+        if verb.tag == HttpVerb_OPTIONS { return "OPTIONS"; }
+        return "?";
+    }
 
-func HttpVerb_Parse(methodStr: String) -> HttpVerb {
-    if String_Eq(methodStr, "GET")     { return HttpVerb { tag: HttpVerb_GET }; }
-    if String_Eq(methodStr, "POST")    { return HttpVerb { tag: HttpVerb_POST }; }
-    if String_Eq(methodStr, "PUT")     { return HttpVerb { tag: HttpVerb_PUT }; }
-    if String_Eq(methodStr, "DELETE")  { return HttpVerb { tag: HttpVerb_DELETE }; }
-    if String_Eq(methodStr, "PATCH")   { return HttpVerb { tag: HttpVerb_PATCH }; }
-    if String_Eq(methodStr, "HEAD")    { return HttpVerb { tag: HttpVerb_HEAD }; }
-    if String_Eq(methodStr, "OPTIONS") { return HttpVerb { tag: HttpVerb_OPTIONS }; }
-    return HttpVerb { tag: HttpVerb_GET };
-}
+    func HttpVerb_Parse(methodStr: String) -> HttpVerb {
+        if String_Eq(methodStr, "GET")     { return HttpVerb { tag: HttpVerb_GET }; }
+        if String_Eq(methodStr, "POST")    { return HttpVerb { tag: HttpVerb_POST }; }
+        if String_Eq(methodStr, "PUT")     { return HttpVerb { tag: HttpVerb_PUT }; }
+        if String_Eq(methodStr, "DELETE")  { return HttpVerb { tag: HttpVerb_DELETE }; }
+        if String_Eq(methodStr, "PATCH")   { return HttpVerb { tag: HttpVerb_PATCH }; }
+        if String_Eq(methodStr, "HEAD")    { return HttpVerb { tag: HttpVerb_HEAD }; }
+        if String_Eq(methodStr, "OPTIONS") { return HttpVerb { tag: HttpVerb_OPTIONS }; }
+        return HttpVerb { tag: HttpVerb_GET };
+    }
 
-// =============================================================================
-// Request — parsed incoming HTTP request
-// =============================================================================
-struct Request {
-    method: HttpVerb,
-    path: String,
-    body: String,
-    headers: StringMap<String>,
-    query: StringMap<String>,
-    pathParams: StringMap<String>,
-}
+    // =============================================================================
+    // Request — parsed incoming HTTP request
+    // =============================================================================
+    struct Request {
+        method: HttpVerb,
+        path: String,
+        body: String,
+        headers: StringMap<String>,
+        query: StringMap<String>,
+        pathParams: StringMap<String>,
+    }
 
-extend Request {
-    func GetHeader(self: Request, name: String) -> String {
-        if StringMap_Has<String>(&self.headers, name) {
-            return StringMap_Get<String>(&self.headers, name);
+    extend Request {
+        func GetHeader(self: Request, name: String) -> String {
+            if StringMap_Has<String>(&self.headers, name) {
+                return StringMap_Get<String>(&self.headers, name);
+            }
+            return "";
         }
-        return "";
-    }
 
-    func GetQuery(self: Request, name: String) -> String {
-        if StringMap_Has<String>(&self.query, name) {
-            return StringMap_Get<String>(&self.query, name);
+        func GetQuery(self: Request, name: String) -> String {
+            if StringMap_Has<String>(&self.query, name) {
+                return StringMap_Get<String>(&self.query, name);
+            }
+            return "";
         }
-        return "";
-    }
 
-    func HasQuery(self: Request, name: String) -> bool {
-        return StringMap_Has<String>(&self.query, name);
-    }
-
-    func GetPathParam(self: Request, name: String) -> String {
-        if StringMap_Has<String>(&self.pathParams, name) {
-            return StringMap_Get<String>(&self.pathParams, name);
+        func HasQuery(self: Request, name: String) -> bool {
+            return StringMap_Has<String>(&self.query, name);
+        }
+
+        func GetPathParam(self: Request, name: String) -> String {
+            if StringMap_Has<String>(&self.pathParams, name) {
+                return StringMap_Get<String>(&self.pathParams, name);
+            }
+            return "";
         }
-        return "";
     }
-}
 
-// =============================================================================
-// Response — outgoing HTTP response
-// =============================================================================
-struct Response {
-    statusCode: int,
-    contentType: String,
-    body: String,
-    extraHeaders: String,
-}
+    // =============================================================================
+    // Response — outgoing HTTP response
+    // =============================================================================
+    struct Response {
+        statusCode: int,
+        contentType: String,
+        body: String,
+        extraHeaders: String,
+    }
 
-// --- Constructors ---
-func Response_New(status: int, contentType: String, body: String) -> Response {
-    return Response { statusCode: status, contentType: contentType, body: body, extraHeaders: "" };
-}
+    // --- Constructors ---
+    func Response_New(status: int, contentType: String, body: String) -> Response {
+        return Response { statusCode: status, contentType: contentType, body: body, extraHeaders: "" };
+    }
 
-func Response_Ok(body: String) -> Response {
-    return Response_New(200, "text/html; charset=utf-8", body);
-}
+    func Response_Ok(body: String) -> Response {
+        return Response_New(200, "text/html; charset=utf-8", body);
+    }
 
-func Response_Html(html: String) -> Response {
-    return Response_New(200, "text/html; charset=utf-8", html);
-}
+    func Response_Html(html: String) -> Response {
+        return Response_New(200, "text/html; charset=utf-8", html);
+    }
 
-func Response_Json(json: String) -> Response {
-    return Response_New(200, "application/json; charset=utf-8", json);
-}
+    func Response_Json(json: String) -> Response {
+        return Response_New(200, "application/json; charset=utf-8", json);
+    }
 
-func Response_Text(text: String) -> Response {
-    return Response_New(200, "text/plain; charset=utf-8", text);
-}
+    func Response_Text(text: String) -> Response {
+        return Response_New(200, "text/plain; charset=utf-8", text);
+    }
 
-func Response_Redirect(url: String) -> Response {
-    let sb: StringBuilder = StringBuilder_New();
-    StringBuilder_Append(&sb, "Location: ");
-    StringBuilder_Append(&sb, url);
-    StringBuilder_Append(&sb, "\r\n");
-    let headers: String = StringBuilder_Build(&sb);
-    StringBuilder_Free(&sb);
-    return Response { statusCode: 302, contentType: "", body: "", extraHeaders: headers };
-}
+    func Response_Redirect(url: String) -> Response {
+        let sb: StringBuilder = StringBuilder_New();
+        StringBuilder_Append(&sb, "Location: ");
+        StringBuilder_Append(&sb, url);
+        StringBuilder_Append(&sb, "\r\n");
+        let headers: String = StringBuilder_Build(&sb);
+        StringBuilder_Free(&sb);
+        return Response { statusCode: 302, contentType: "", body: "", extraHeaders: headers };
+    }
 
-func Response_NotFound() -> Response {
-    return Response_New(404, "application/json; charset=utf-8", "{\"error\":\"not_found\"}");
-}
+    func Response_NotFound() -> Response {
+        return Response_New(404, "application/json; charset=utf-8", "{\"error\":\"not_found\"}");
+    }
 
-func Response_Error(status: int, message: String) -> Response {
-    let sb: StringBuilder = StringBuilder_New();
-    StringBuilder_Append(&sb, "{\"error\":\"");
-    StringBuilder_Append(&sb, message);
-    StringBuilder_Append(&sb, "\"}");
+    func Response_Error(status: int, message: String) -> Response {
+        let sb: StringBuilder = StringBuilder_New();
+        StringBuilder_Append(&sb, "{\"error\":\"");
+        StringBuilder_Append(&sb, message);
+        StringBuilder_Append(&sb, "\"}");
     let body: String = StringBuilder_Build(&sb);
     StringBuilder_Free(&sb);
     return Response_New(status, "application/json; charset=utf-8", body);

apps/boko-framework/src/Main.bux

@@ -3,56 +3,56 @@
 // =============================================================================
 module Main {
 
-import Std::Io::{PrintLine, Print};
-import Std::String::{
-    String_Eq, String_Len,
-    StringBuilder, StringBuilder_New, StringBuilder_Append,
-    StringBuilder_Build, StringBuilder_Free
-};
-import Boko::{
-    App, App_New, App_Run,
-    Request, Response,
-    Response_Html, Response_Json, Response_NotFound, Response_Redirect,
-    Path_Match,
-    HttpVerb
-};
+    import Std::Io::{PrintLine, Print};
+    import Std::String::{
+        String_Eq, String_Len,
+        StringBuilder, StringBuilder_New, StringBuilder_Append,
+        StringBuilder_Build, StringBuilder_Free
+    };
+    import Boko::{
+        App, App_New, App_Run,
+        Request, Response,
+        Response_Html, Response_Json, Response_NotFound, Response_Redirect,
+        Path_Match,
+        HttpVerb
+    };
 
-// =============================================================================
-// Boko_Router — user-defined dispatch (called by the framework)
-// =============================================================================
-func Boko_Router(req: Request) -> Response {
-    // --- GET / ---
-    if String_Eq(req.path, "/") && req.method.tag == HttpVerb_GET {
-        return Response_Html(PageHome());
-    }
+    // =============================================================================
+    // Boko_Router — user-defined dispatch (called by the framework)
+    // =============================================================================
+    func Boko_Router(req: Request) -> Response {
+        // --- GET / ---
+        if String_Eq(req.path, "/") && req.method.tag == HttpVerb_GET {
+            return Response_Html(PageHome());
+        }
 
-    // --- GET /api/health ---
-    if String_Eq(req.path, "/api/health") {
-        return Response_Json("{\"status\":\"ok\",\"framework\":\"Boko\",\"version\":\"0.2.0\"}");
-    }
+        // --- GET /api/health ---
+        if String_Eq(req.path, "/api/health") {
+            return Response_Json("{\"status\":\"ok\",\"framework\":\"Boko\",\"version\":\"0.2.0\"}");
+        }
 
-    // --- GET /api/info ---
-    if String_Eq(req.path, "/api/info") {
-        return Response_Json("{\"name\":\"Boko\",\"language\":\"Bux\",\"inspiration\":\"FastAPI\",\"features\":[\"routing\",\"path-params\",\"query-params\",\"json\"]}");
-    }
+        // --- GET /api/info ---
+        if String_Eq(req.path, "/api/info") {
+            return Response_Json("{\"name\":\"Boko\",\"language\":\"Bux\",\"inspiration\":\"FastAPI\",\"features\":[\"routing\",\"path-params\",\"query-params\",\"json\"]}");
+        }
 
-    // --- GET /hello?name=World ---
-    if String_Eq(req.path, "/hello") {
-        var name: String = req.GetQuery("name");
-        if String_Len(name) == 0 { name = "World"; }
-        let html: String = f"<h1>Hello, {name}!</h1>";
-        return Response_Html(html);
-    }
+        // --- GET /hello?name=World ---
+        if String_Eq(req.path, "/hello") {
+            var name: String = req.GetQuery("name");
+            if String_Len(name) == 0 { name = "World"; }
+            let html: String = f"<h1>Hello, {name}!</h1>";
+            return Response_Html(html);
+        }
 
-    // --- GET /users/{id} ---
-    if Path_Match("/users/{id}", req.path, &req) {
-        let id: String = req.GetPathParam("id");
-        let sb: StringBuilder = StringBuilder_New();
-        StringBuilder_Append(&sb, "{\"id\":");
-        StringBuilder_Append(&sb, id);
-        StringBuilder_Append(&sb, ",\"name\":\"User ");
-        StringBuilder_Append(&sb, id);
-        StringBuilder_Append(&sb, "\"}");
+        // --- GET /users/{id} ---
+        if Path_Match("/users/{id}", req.path, &req) {
+            let id: String = req.GetPathParam("id");
+            let sb: StringBuilder = StringBuilder_New();
+            StringBuilder_Append(&sb, "{\"id\":");
+            StringBuilder_Append(&sb, id);
+            StringBuilder_Append(&sb, ",\"name\":\"User ");
+            StringBuilder_Append(&sb, id);
+            StringBuilder_Append(&sb, "\"}");
         let json: String = StringBuilder_Build(&sb);
         StringBuilder_Free(&sb);
         return Response_Json(json);
@@ -98,46 +98,46 @@ func Boko_Router(req: Request) -> Response {
 // =============================================================================
 func PageHome() -> String {
     return `<!DOCTYPE html>
-<html lang="en">
-<head>
-<meta charset="UTF-8">
-<meta name="viewport" content="width=device-width, initial-scale=1.0">
-<title>Boko Framework</title>
-<style>
-*{margin:0;padding:0;box-sizing:border-box}
-body{font-family:system-ui,sans-serif;background:#0d1117;color:#c9d1d9;min-height:100vh;display:flex;align-items:center;justify-content:center}
-.card{background:#161b22;border:1px solid #30363d;border-radius:12px;padding:3rem;max-width:560px;width:100%}
-h1{color:#58a6ff;font-size:2rem;margin-bottom:.5rem}
-.tag{color:#8b949e;font-size:.9rem;margin-bottom:2rem}
-h3{color:#d2a8ff;margin:1.5rem 0 .75rem}
-.ep{display:flex;gap:1rem;padding:.35rem 0;font-family:monospace;font-size:.9rem}
-.ep .m{color:#3fb950;font-weight:bold;min-width:52px}
-.ep .p{color:#c9d1d9}
-.ep .d{color:#484f58;margin-left:auto}
-a{color:#58a6ff}
-</style>
-</head>
-<body>
-<div class="card">
-<h1>⚡ Boko</h1>
-<p class="tag">Async web framework for Bux — inspired by FastAPI</p>
-<h3>Try it</h3>
-<div class="ep"><span class="m">GET</span><span class="p"><a href="/hello?name=Bux">/hello?name=Bux</a></span><span class="d">query param</span></div>
-<div class="ep"><span class="m">GET</span><span class="p"><a href="/users/42">/users/42</a></span><span class="d">path param</span></div>
-<div class="ep"><span class="m">GET</span><span class="p"><a href="/posts/7/comments/3">/posts/7/comments/3</a></span><span class="d">multi params</span></div>
-<div class="ep"><span class="m">GET</span><span class="p"><a href="/redirect">/redirect</a></span><span class="d">302 → /</span></div>
-<div class="ep"><span class="m">GET</span><span class="p"><a href="/api/health">/api/health</a></span><span class="d">JSON</span></div>
-<div class="ep"><span class="m">GET</span><span class="p"><a href="/api/info">/api/info</a></span><span class="d">JSON</span></div>
-<h3>Features</h3>
-<div class="ep"><span class="m">✓</span><span class="p">Path routing with {params}</span></div>
-<div class="ep"><span class="m">✓</span><span class="p">Query parameter extraction</span></div>
-<div class="ep"><span class="m">✓</span><span class="p">JSON / HTML / Text responses</span></div>
-<div class="ep"><span class="m">✓</span><span class="p">Multi-threaded (configurable)</span></div>
-<div class="ep"><span class="m">✓</span><span class="p">Redirects (302)</span></div>
-<div class="ep"><span class="m">✓</span><span class="p">POST body access</span></div>
-</div>
-</body>
-</html>`;
+    <html lang="en">
+    <head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Boko Framework</title>
+    <style>
+    *{margin:0;padding:0;box-sizing:border-box}
+    body{font-family:system-ui,sans-serif;background:#0d1117;color:#c9d1d9;min-height:100vh;display:flex;align-items:center;justify-content:center}
+    .card{background:#161b22;border:1px solid #30363d;border-radius:12px;padding:3rem;max-width:560px;width:100%}
+    h1{color:#58a6ff;font-size:2rem;margin-bottom:.5rem}
+    .tag{color:#8b949e;font-size:.9rem;margin-bottom:2rem}
+    h3{color:#d2a8ff;margin:1.5rem 0 .75rem}
+    .ep{display:flex;gap:1rem;padding:.35rem 0;font-family:monospace;font-size:.9rem}
+    .ep .m{color:#3fb950;font-weight:bold;min-width:52px}
+    .ep .p{color:#c9d1d9}
+    .ep .d{color:#484f58;margin-left:auto}
+    a{color:#58a6ff}
+    </style>
+    </head>
+    <body>
+    <div class="card">
+    <h1>⚡ Boko</h1>
+    <p class="tag">Async web framework for Bux — inspired by FastAPI</p>
+    <h3>Try it</h3>
+    <div class="ep"><span class="m">GET</span><span class="p"><a href="/hello?name=Bux">/hello?name=Bux</a></span><span class="d">query param</span></div>
+    <div class="ep"><span class="m">GET</span><span class="p"><a href="/users/42">/users/42</a></span><span class="d">path param</span></div>
+    <div class="ep"><span class="m">GET</span><span class="p"><a href="/posts/7/comments/3">/posts/7/comments/3</a></span><span class="d">multi params</span></div>
+    <div class="ep"><span class="m">GET</span><span class="p"><a href="/redirect">/redirect</a></span><span class="d">302 → /</span></div>
+    <div class="ep"><span class="m">GET</span><span class="p"><a href="/api/health">/api/health</a></span><span class="d">JSON</span></div>
+    <div class="ep"><span class="m">GET</span><span class="p"><a href="/api/info">/api/info</a></span><span class="d">JSON</span></div>
+    <h3>Features</h3>
+    <div class="ep"><span class="m">✓</span><span class="p">Path routing with {params}</span></div>
+    <div class="ep"><span class="m">✓</span><span class="p">Query parameter extraction</span></div>
+    <div class="ep"><span class="m">✓</span><span class="p">JSON / HTML / Text responses</span></div>
+    <div class="ep"><span class="m">✓</span><span class="p">Multi-threaded (configurable)</span></div>
+    <div class="ep"><span class="m">✓</span><span class="p">Redirects (302)</span></div>
+    <div class="ep"><span class="m">✓</span><span class="p">POST body access</span></div>
+    </div>
+    </body>
+    </html>`;
 }
 
 // =============================================================================

apps/jwt-pitbul/src/Main.bux

@@ -5,464 +5,464 @@
 // =============================================================================
 module Main {
 
-import Std::Io::{PrintLine, Print, PrintInt};
-import Std::String::{
-    String_Len, String_Eq,
-    String_SplitCount, String_SplitPart,
-    StringBuilder, StringBuilder_New, StringBuilder_Append,
-    StringBuilder_AppendInt, StringBuilder_Build, StringBuilder_Free
-};
-import Std::Crypto::Jwt::{
-    JwtAlg,
-    Jwt_MakeHeader,
-    Jwt_Encode,
-    Jwt_Decode,
-    Jwt_EncodeHS256, Jwt_EncodeHS384, Jwt_EncodeHS512,
-    Jwt_EncodeRS256, Jwt_EncodeES256, Jwt_EncodeEdDSA
-};
-import Std::Crypto::Base64::{Base64URL_Decode, Base64_Encode};
-import Std::Crypto::Ed25519::{Ed25519_Keypair};
+    import Std::Io::{PrintLine, Print, PrintInt};
+    import Std::String::{
+        String_Len, String_Eq,
+        String_SplitCount, String_SplitPart,
+        StringBuilder, StringBuilder_New, StringBuilder_Append,
+        StringBuilder_AppendInt, StringBuilder_Build, StringBuilder_Free
+    };
+    import Std::Crypto::Jwt::{
+        JwtAlg,
+        Jwt_MakeHeader,
+        Jwt_Encode,
+        Jwt_Decode,
+        Jwt_EncodeHS256, Jwt_EncodeHS384, Jwt_EncodeHS512,
+        Jwt_EncodeRS256, Jwt_EncodeES256, Jwt_EncodeEdDSA
+    };
+    import Std::Crypto::Base64::{Base64URL_Decode, Base64_Encode};
+    import Std::Crypto::Ed25519::{Ed25519_Keypair};
 
-extern func bux_argc() -> int;
-extern func bux_argv(index: int) -> String;
-extern func bux_alloc(size: uint) -> *void;
-extern func bux_read_file(path: String) -> String;
-extern func bux_file_exists(path: String) -> int;
-extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_argc() -> int;
+    extern func bux_argv(index: int) -> String;
+    extern func bux_alloc(size: uint) -> *void;
+    extern func bux_read_file(path: String) -> String;
+    extern func bux_file_exists(path: String) -> int;
+    extern func bux_base64_encode(data: String, len: int) -> String;
 
-// =============================================================================
-// Constants
-// =============================================================================
-const AppName: String = "jwt-pitbul";
-const Version: String = "0.2.0";
+    // =============================================================================
+    // Constants
+    // =============================================================================
+    const AppName: String = "jwt-pitbul";
+    const Version: String = "0.2.0";
 
-// =============================================================================
-// Algebraic enums for optionals and results
-// =============================================================================
-enum AlgOption {
-    Some(JwtAlg),
-    None,
-}
-
-func AlgOption_MakeSome(value: JwtAlg) -> AlgOption {
-    let o: AlgOption = AlgOption { tag: AlgOption_Some };
-    o.data.Some_0 = value;
-    return o;
-}
-
-func AlgOption_MakeNone() -> AlgOption {
-    return AlgOption { tag: AlgOption_None };
-}
-
-enum CmdOption {
-    Some(Cmd),
-    None,
-}
-
-func CmdOption_MakeSome(value: Cmd) -> CmdOption {
-    let o: CmdOption = CmdOption { tag: CmdOption_Some };
-    o.data.Some_0 = value;
-    return o;
-}
-
-func CmdOption_MakeNone() -> CmdOption {
-    return CmdOption { tag: CmdOption_None };
-}
-
-enum KeyTypeOption {
-    Some(KeyType),
-    None,
-}
-
-func KeyTypeOption_MakeSome(value: KeyType) -> KeyTypeOption {
-    let o: KeyTypeOption = KeyTypeOption { tag: KeyTypeOption_Some };
-    o.data.Some_0 = value;
-    return o;
-}
-
-func KeyTypeOption_MakeNone() -> KeyTypeOption {
-    return KeyTypeOption { tag: KeyTypeOption_None };
-}
-
-enum KeyResult {
-    Ok(String),
-    Err(String),
-}
-
-func KeyResult_MakeOk(value: String) -> KeyResult {
-    let r: KeyResult = KeyResult { tag: KeyResult_Ok };
-    r.data.Ok_0 = value;
-    return r;
-}
-
-func KeyResult_MakeErr(msg: String) -> KeyResult {
-    let r: KeyResult = KeyResult { tag: KeyResult_Err };
-    r.data.Err_0 = msg;
-    return r;
-}
-
-enum ExitResult {
-    Ok(int),
-    Err(String),
-}
-
-func ExitResult_MakeOk(value: int) -> ExitResult {
-    let r: ExitResult = ExitResult { tag: ExitResult_Ok };
-    r.data.Ok_0 = value;
-    return r;
-}
-
-func ExitResult_MakeErr(msg: String) -> ExitResult {
-    let r: ExitResult = ExitResult { tag: ExitResult_Err };
-    r.data.Err_0 = msg;
-    return r;
-}
-
-// =============================================================================
-// Commands
-// =============================================================================
-enum Cmd {
-    Sign,
-    Verify,
-    Decode,
-    Keygen,
-    Help,
-}
-
-func ParseCmd(name: String) -> CmdOption {
-    if String_Eq(name, "sign")   { return CmdOption_MakeSome(Cmd { tag: Cmd_Sign }); }
-    if String_Eq(name, "verify") { return CmdOption_MakeSome(Cmd { tag: Cmd_Verify }); }
-    if String_Eq(name, "decode") { return CmdOption_MakeSome(Cmd { tag: Cmd_Decode }); }
-    if String_Eq(name, "keygen") { return CmdOption_MakeSome(Cmd { tag: Cmd_Keygen }); }
-    if String_Eq(name, "help") || String_Eq(name, "--help") || String_Eq(name, "-h") {
-        return CmdOption_MakeSome(Cmd { tag: Cmd_Help });
+    // =============================================================================
+    // Algebraic enums for optionals and results
+    // =============================================================================
+    enum AlgOption {
+        Some(JwtAlg),
+        None,
     }
-    return CmdOption_MakeNone();
-}
 
-// =============================================================================
-// Key type generation
-// =============================================================================
-enum KeyType {
-    Rsa,
-    Ecdsa,
-    Ed25519,
-}
+    func AlgOption_MakeSome(value: JwtAlg) -> AlgOption {
+        let o: AlgOption = AlgOption { tag: AlgOption_Some };
+        o.data.Some_0 = value;
+        return o;
+    }
 
-func ParseKeyType(name: String) -> KeyTypeOption {
-    if String_Eq(name, "rsa")     { return KeyTypeOption_MakeSome(KeyType { tag: KeyType_Rsa }); }
-    if String_Eq(name, "ecdsa")   { return KeyTypeOption_MakeSome(KeyType { tag: KeyType_Ecdsa }); }
-    if String_Eq(name, "ed25519") { return KeyTypeOption_MakeSome(KeyType { tag: KeyType_Ed25519 }); }
-    return KeyTypeOption_MakeNone();
-}
+    func AlgOption_MakeNone() -> AlgOption {
+        return AlgOption { tag: AlgOption_None };
+    }
 
-// =============================================================================
-// Extend JwtAlg with parsing / introspection methods
-// =============================================================================
-extend JwtAlg {
-    func Name(self: JwtAlg) -> String {
-        match self {
-            JwtAlg::HS256 => "HS256",
-            JwtAlg::HS384 => "HS384",
-            JwtAlg::HS512 => "HS512",
-            JwtAlg::RS256 => "RS256",
-            JwtAlg::RS384 => "RS384",
-            JwtAlg::RS512 => "RS512",
-            JwtAlg::ES256 => "ES256",
-            JwtAlg::ES384 => "ES384",
-            JwtAlg::EdDSA => "EdDSA",
-            _ => "HS256",
+    enum CmdOption {
+        Some(Cmd),
+        None,
+    }
+
+    func CmdOption_MakeSome(value: Cmd) -> CmdOption {
+        let o: CmdOption = CmdOption { tag: CmdOption_Some };
+        o.data.Some_0 = value;
+        return o;
+    }
+
+    func CmdOption_MakeNone() -> CmdOption {
+        return CmdOption { tag: CmdOption_None };
+    }
+
+    enum KeyTypeOption {
+        Some(KeyType),
+        None,
+    }
+
+    func KeyTypeOption_MakeSome(value: KeyType) -> KeyTypeOption {
+        let o: KeyTypeOption = KeyTypeOption { tag: KeyTypeOption_Some };
+        o.data.Some_0 = value;
+        return o;
+    }
+
+    func KeyTypeOption_MakeNone() -> KeyTypeOption {
+        return KeyTypeOption { tag: KeyTypeOption_None };
+    }
+
+    enum KeyResult {
+        Ok(String),
+        Err(String),
+    }
+
+    func KeyResult_MakeOk(value: String) -> KeyResult {
+        let r: KeyResult = KeyResult { tag: KeyResult_Ok };
+        r.data.Ok_0 = value;
+        return r;
+    }
+
+    func KeyResult_MakeErr(msg: String) -> KeyResult {
+        let r: KeyResult = KeyResult { tag: KeyResult_Err };
+        r.data.Err_0 = msg;
+        return r;
+    }
+
+    enum ExitResult {
+        Ok(int),
+        Err(String),
+    }
+
+    func ExitResult_MakeOk(value: int) -> ExitResult {
+        let r: ExitResult = ExitResult { tag: ExitResult_Ok };
+        r.data.Ok_0 = value;
+        return r;
+    }
+
+    func ExitResult_MakeErr(msg: String) -> ExitResult {
+        let r: ExitResult = ExitResult { tag: ExitResult_Err };
+        r.data.Err_0 = msg;
+        return r;
+    }
+
+    // =============================================================================
+    // Commands
+    // =============================================================================
+    enum Cmd {
+        Sign,
+        Verify,
+        Decode,
+        Keygen,
+        Help,
+    }
+
+    func ParseCmd(name: String) -> CmdOption {
+        if String_Eq(name, "sign")   { return CmdOption_MakeSome(Cmd { tag: Cmd_Sign }); }
+        if String_Eq(name, "verify") { return CmdOption_MakeSome(Cmd { tag: Cmd_Verify }); }
+        if String_Eq(name, "decode") { return CmdOption_MakeSome(Cmd { tag: Cmd_Decode }); }
+        if String_Eq(name, "keygen") { return CmdOption_MakeSome(Cmd { tag: Cmd_Keygen }); }
+        if String_Eq(name, "help") || String_Eq(name, "--help") || String_Eq(name, "-h") {
+            return CmdOption_MakeSome(Cmd { tag: Cmd_Help });
         }
+        return CmdOption_MakeNone();
     }
 
-    func IsHmac(self: JwtAlg) -> bool {
-        return self.tag == JwtAlg_HS256 || self.tag == JwtAlg_HS384 || self.tag == JwtAlg_HS512;
+    // =============================================================================
+    // Key type generation
+    // =============================================================================
+    enum KeyType {
+        Rsa,
+        Ecdsa,
+        Ed25519,
     }
 
-    func NeedsPemFile(self: JwtAlg) -> bool {
-        return self.tag == JwtAlg_RS256 || self.tag == JwtAlg_RS384 || self.tag == JwtAlg_RS512 ||
-               self.tag == JwtAlg_ES256 || self.tag == JwtAlg_ES384;
+    func ParseKeyType(name: String) -> KeyTypeOption {
+        if String_Eq(name, "rsa")     { return KeyTypeOption_MakeSome(KeyType { tag: KeyType_Rsa }); }
+        if String_Eq(name, "ecdsa")   { return KeyTypeOption_MakeSome(KeyType { tag: KeyType_Ecdsa }); }
+        if String_Eq(name, "ed25519") { return KeyTypeOption_MakeSome(KeyType { tag: KeyType_Ed25519 }); }
+        return KeyTypeOption_MakeNone();
     }
 
-}
-
-func ParseAlg(name: String) -> AlgOption {
-    if String_Eq(name, "HS256") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_HS256 }); }
-    if String_Eq(name, "HS384") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_HS384 }); }
-    if String_Eq(name, "HS512") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_HS512 }); }
-    if String_Eq(name, "RS256") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_RS256 }); }
-    if String_Eq(name, "RS384") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_RS384 }); }
-    if String_Eq(name, "RS512") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_RS512 }); }
-    if String_Eq(name, "ES256") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_ES256 }); }
-    if String_Eq(name, "ES384") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_ES384 }); }
-    if String_Eq(name, "EdDSA") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_EdDSA }); }
-    return AlgOption_MakeNone();
-}
-
-// =============================================================================
-// Help / Usage
-// =============================================================================
-func PrintUsage() {
-    PrintLine("╔══════════════════════════════════════════════════════╗");
-    PrintLine(f"║  {AppName} — JWT CLI Tool v{Version}                  ║");
-    PrintLine("║  Sign, verify, decode JSON Web Tokens               ║");
-    PrintLine("╚══════════════════════════════════════════════════════╝");
-    PrintLine("");
-    PrintLine("Usage:");
-    PrintLine(f"  {AppName} sign <alg> <key> <claims>");
-    PrintLine(f"  {AppName} verify <token> <alg> <key>");
-    PrintLine(f"  {AppName} decode <token>");
-    PrintLine(f"  {AppName} keygen <type>");
-    PrintLine("");
-    PrintLine("Commands:");
-    PrintLine("  sign     Create a signed JWT from claims JSON");
-    PrintLine("  verify   Verify a JWT signature and print payload");
-    PrintLine("  decode   Decode a JWT without verification");
-    PrintLine("  keygen   Generate cryptographic keys");
-    PrintLine("");
-    PrintLine("Algorithms:");
-    PrintLine("  HS256, HS384, HS512     — HMAC (symmetric)");
-    PrintLine("  RS256, RS384, RS512     — RSA PKCS#1 v1.5");
-    PrintLine("  ES256, ES384            — ECDSA P-256 / P-384");
-    PrintLine("  EdDSA                   — Ed25519");
-    PrintLine("");
-    PrintLine("Key formats:");
-    PrintLine("  HMAC:  raw secret string");
-    PrintLine("  RSA:   path to PEM private/public key file");
-    PrintLine("  ECDSA: path to PEM private/public key file");
-    PrintLine("  EdDSA: base64-encoded 32-byte raw key");
-    PrintLine("");
-    PrintLine("Key generation:");
-    PrintLine(f"  {AppName} keygen rsa       # RSA 2048-bit (PEM)");
-    PrintLine(f"  {AppName} keygen ecdsa     # ECDSA P-256 (PEM)");
-    PrintLine(f"  {AppName} keygen ed25519   # Ed25519 (raw base64)");
-    PrintLine("");
-    PrintLine("Examples:");
-    Print(f"  {AppName} sign HS256 'my-secret' ");
-    PrintLine("'{\"sub\":\"123\"}'");
-    PrintLine(f"  {AppName} verify eyJh... HS256 'my-secret'");
-    PrintLine(f"  {AppName} decode eyJh...");
-    PrintLine(f"  {AppName} keygen ed25519");
-}
-
-// =============================================================================
-// Key resolution — for RSA/ECDSA, read PEM file; for HMAC/EdDSA, pass through
-// =============================================================================
-func ResolveKey(alg: JwtAlg, keyArg: String) -> KeyResult {
-    if !alg.NeedsPemFile() {
-        return KeyResult_MakeOk(keyArg);
-    }
-
-    if bux_file_exists(keyArg) == 0 {
-        return KeyResult_MakeErr(f"ERROR: PEM file not found: {keyArg}");
-    }
-
-    let pem: String = bux_read_file(keyArg);
-    if String_Len(pem) == 0 {
-        return KeyResult_MakeErr(f"ERROR: could not read PEM file: {keyArg}");
-    }
-    return KeyResult_MakeOk(pem);
-}
-
-// =============================================================================
-// Command: sign
-// =============================================================================
-func CmdSign(algName: String, keyArg: String, claimsJson: String) -> ExitResult {
-    let algOpt: AlgOption = ParseAlg(algName);
-    if algOpt.tag != AlgOption_Some {
-        return ExitResult_MakeErr(f"ERROR: unknown algorithm '{algName}'");
-    }
-    let alg: JwtAlg = algOpt.data.Some_0;
-
-    let keyRes: KeyResult = ResolveKey(alg, keyArg);
-    if keyRes.tag != KeyResult_Ok {
-        return ExitResult_MakeErr(keyRes.data.Err_0);
-    }
-    let key: String = keyRes.data.Ok_0;
-
-    let header: String = Jwt_MakeHeader(alg);
-    let token: String = Jwt_Encode(header, claimsJson, alg, key);
-
-    if String_Len(token) == 0 {
-        return ExitResult_MakeErr("ERROR: signing failed");
-    }
-
-    PrintLine(token);
-    return ExitResult_MakeOk(0);
-}
-
-// =============================================================================
-// Command: verify
-// =============================================================================
-func CmdVerify(token: String, algName: String, keyArg: String) -> ExitResult {
-    let algOpt: AlgOption = ParseAlg(algName);
-    if algOpt.tag != AlgOption_Some {
-        return ExitResult_MakeErr(f"ERROR: unknown algorithm '{algName}'");
-    }
-    let alg: JwtAlg = algOpt.data.Some_0;
-
-    let keyRes: KeyResult = ResolveKey(alg, keyArg);
-    if keyRes.tag != KeyResult_Ok {
-        return ExitResult_MakeErr(keyRes.data.Err_0);
-    }
-    let key: String = keyRes.data.Ok_0;
-
-    var header: String = "";
-    var payload: String = "";
-
-    if !Jwt_Decode(token, alg, key, &header, &payload) {
-        return ExitResult_MakeErr("✗ Signature INVALID (or malformed token)");
-    }
-
-    PrintLine("✓ Signature valid");
-    PrintLine("");
-    PrintLine("Header:");
-    PrintLine(header);
-    PrintLine("");
-    PrintLine("Payload:");
-    PrintLine(payload);
-    return ExitResult_MakeOk(0);
-}
-
-// =============================================================================
-// Command: decode (no verification)
-// =============================================================================
-func CmdDecode(token: String) -> ExitResult {
-    let partCount: uint = String_SplitCount(token, ".");
-    if partCount != 3 {
-        return ExitResult_MakeErr("ERROR: not a valid JWT (expected 3 parts)");
-    }
-
-    let headerB64: String = String_SplitPart(token, ".", 0);
-    let payloadB64: String = String_SplitPart(token, ".", 1);
-    let sigB64: String = String_SplitPart(token, ".", 2);
-
-    let headerJson: String = Base64URL_Decode(headerB64);
-    let payloadJson: String = Base64URL_Decode(payloadB64);
-
-    PrintLine("Decoded (no verification):");
-    PrintLine("");
-    PrintLine("Header:");
-    PrintLine(headerJson);
-    PrintLine("");
-    PrintLine("Payload:");
-    PrintLine(payloadJson);
-    PrintLine("");
-    Print("Signature (base64url): ");
-    PrintLine(sigB64);
-
-    return ExitResult_MakeOk(0);
-}
-
-// =============================================================================
-// Command: keygen
-// =============================================================================
-func CmdKeygen(keyType: String) -> ExitResult {
-    let ktOpt: KeyTypeOption = ParseKeyType(keyType);
-    if ktOpt.tag != KeyTypeOption_Some {
-        return ExitResult_MakeErr(f"ERROR: unknown key type '{keyType}'. Use: rsa, ecdsa, ed25519");
-    }
-    let kt: KeyType = ktOpt.data.Some_0;
-
-    if kt.tag == KeyType_Ed25519 {
-        let pubBuf: *void = bux_alloc(32);
-        let priv: *void = bux_alloc(32);
-        if !Ed25519_Keypair(pubBuf, priv) {
-            return ExitResult_MakeErr("ERROR: Ed25519 key generation failed (OpenSSL 1.1.1+ required)");
+    // =============================================================================
+    // Extend JwtAlg with parsing / introspection methods
+    // =============================================================================
+    extend JwtAlg {
+        func Name(self: JwtAlg) -> String {
+            match self {
+                JwtAlg::HS256 => "HS256",
+                JwtAlg::HS384 => "HS384",
+                JwtAlg::HS512 => "HS512",
+                JwtAlg::RS256 => "RS256",
+                JwtAlg::RS384 => "RS384",
+                JwtAlg::RS512 => "RS512",
+                JwtAlg::ES256 => "ES256",
+                JwtAlg::ES384 => "ES384",
+                JwtAlg::EdDSA => "EdDSA",
+                _ => "HS256",
+            }
         }
-        let pubB64: String = bux_base64_encode(pubBuf as String, 32);
-        let privB64: String = bux_base64_encode(priv as String, 32);
-        PrintLine("Ed25519 keypair (base64):");
-        PrintLine(f"  Public:  {pubB64}");
-        PrintLine(f"  Private: {privB64}");
-        return ExitResult_MakeOk(0);
+
+        func IsHmac(self: JwtAlg) -> bool {
+            return self.tag == JwtAlg_HS256 || self.tag == JwtAlg_HS384 || self.tag == JwtAlg_HS512;
+        }
+
+        func NeedsPemFile(self: JwtAlg) -> bool {
+            return self.tag == JwtAlg_RS256 || self.tag == JwtAlg_RS384 || self.tag == JwtAlg_RS512 ||
+            self.tag == JwtAlg_ES256 || self.tag == JwtAlg_ES384;
+        }
+
     }
-    if kt.tag == KeyType_Rsa {
-        PrintLine("RSA key generation requires OpenSSL CLI:");
-        PrintLine("  openssl genpkey -algorithm RSA -out private.pem -pkeyopt rsa_keygen_bits:2048");
-        PrintLine("  openssl rsa -in private.pem -pubout -out public.pem");
+
+    func ParseAlg(name: String) -> AlgOption {
+        if String_Eq(name, "HS256") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_HS256 }); }
+        if String_Eq(name, "HS384") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_HS384 }); }
+        if String_Eq(name, "HS512") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_HS512 }); }
+        if String_Eq(name, "RS256") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_RS256 }); }
+        if String_Eq(name, "RS384") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_RS384 }); }
+        if String_Eq(name, "RS512") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_RS512 }); }
+        if String_Eq(name, "ES256") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_ES256 }); }
+        if String_Eq(name, "ES384") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_ES384 }); }
+        if String_Eq(name, "EdDSA") { return AlgOption_MakeSome(JwtAlg { tag: JwtAlg_EdDSA }); }
+        return AlgOption_MakeNone();
+    }
+
+    // =============================================================================
+    // Help / Usage
+    // =============================================================================
+    func PrintUsage() {
+        PrintLine("╔══════════════════════════════════════════════════════╗");
+        PrintLine(f"║  {AppName} — JWT CLI Tool v{Version}                  ║");
+        PrintLine("║  Sign, verify, decode JSON Web Tokens               ║");
+        PrintLine("╚══════════════════════════════════════════════════════╝");
         PrintLine("");
-        PrintLine("(Key generation from within Bux requires PEM write support — coming soon)");
-        return ExitResult_MakeOk(0);
-    }
-    if kt.tag == KeyType_Ecdsa {
-        PrintLine("ECDSA key generation requires OpenSSL CLI:");
-        PrintLine("  openssl ecparam -genkey -name prime256v1 -noout -out ec_private.pem");
-        PrintLine("  openssl ec -in ec_private.pem -pubout -out ec_public.pem");
+        PrintLine("Usage:");
+        PrintLine(f"  {AppName} sign <alg> <key> <claims>");
+        PrintLine(f"  {AppName} verify <token> <alg> <key>");
+        PrintLine(f"  {AppName} decode <token>");
+        PrintLine(f"  {AppName} keygen <type>");
         PrintLine("");
-        PrintLine("(Key generation from within Bux requires PEM write support — coming soon)");
+        PrintLine("Commands:");
+        PrintLine("  sign     Create a signed JWT from claims JSON");
+        PrintLine("  verify   Verify a JWT signature and print payload");
+        PrintLine("  decode   Decode a JWT without verification");
+        PrintLine("  keygen   Generate cryptographic keys");
+        PrintLine("");
+        PrintLine("Algorithms:");
+        PrintLine("  HS256, HS384, HS512     — HMAC (symmetric)");
+        PrintLine("  RS256, RS384, RS512     — RSA PKCS#1 v1.5");
+        PrintLine("  ES256, ES384            — ECDSA P-256 / P-384");
+        PrintLine("  EdDSA                   — Ed25519");
+        PrintLine("");
+        PrintLine("Key formats:");
+        PrintLine("  HMAC:  raw secret string");
+        PrintLine("  RSA:   path to PEM private/public key file");
+        PrintLine("  ECDSA: path to PEM private/public key file");
+        PrintLine("  EdDSA: base64-encoded 32-byte raw key");
+        PrintLine("");
+        PrintLine("Key generation:");
+        PrintLine(f"  {AppName} keygen rsa       # RSA 2048-bit (PEM)");
+        PrintLine(f"  {AppName} keygen ecdsa     # ECDSA P-256 (PEM)");
+        PrintLine(f"  {AppName} keygen ed25519   # Ed25519 (raw base64)");
+        PrintLine("");
+        PrintLine("Examples:");
+        Print(f"  {AppName} sign HS256 'my-secret' ");
+        PrintLine("'{\"sub\":\"123\"}'");
+        PrintLine(f"  {AppName} verify eyJh... HS256 'my-secret'");
+        PrintLine(f"  {AppName} decode eyJh...");
+        PrintLine(f"  {AppName} keygen ed25519");
+    }
+
+    // =============================================================================
+    // Key resolution — for RSA/ECDSA, read PEM file; for HMAC/EdDSA, pass through
+    // =============================================================================
+    func ResolveKey(alg: JwtAlg, keyArg: String) -> KeyResult {
+        if !alg.NeedsPemFile() {
+            return KeyResult_MakeOk(keyArg);
+        }
+
+        if bux_file_exists(keyArg) == 0 {
+            return KeyResult_MakeErr(f"ERROR: PEM file not found: {keyArg}");
+        }
+
+        let pem: String = bux_read_file(keyArg);
+        if String_Len(pem) == 0 {
+            return KeyResult_MakeErr(f"ERROR: could not read PEM file: {keyArg}");
+        }
+        return KeyResult_MakeOk(pem);
+    }
+
+    // =============================================================================
+    // Command: sign
+    // =============================================================================
+    func CmdSign(algName: String, keyArg: String, claimsJson: String) -> ExitResult {
+        let algOpt: AlgOption = ParseAlg(algName);
+        if algOpt.tag != AlgOption_Some {
+            return ExitResult_MakeErr(f"ERROR: unknown algorithm '{algName}'");
+        }
+        let alg: JwtAlg = algOpt.data.Some_0;
+
+        let keyRes: KeyResult = ResolveKey(alg, keyArg);
+        if keyRes.tag != KeyResult_Ok {
+            return ExitResult_MakeErr(keyRes.data.Err_0);
+        }
+        let key: String = keyRes.data.Ok_0;
+
+        let header: String = Jwt_MakeHeader(alg);
+        let token: String = Jwt_Encode(header, claimsJson, alg, key);
+
+        if String_Len(token) == 0 {
+            return ExitResult_MakeErr("ERROR: signing failed");
+        }
+
+        PrintLine(token);
         return ExitResult_MakeOk(0);
     }
-    return ExitResult_MakeErr(f"ERROR: unknown key type '{keyType}'");
-}
 
-// =============================================================================
-// Dispatch a parsed command to its handler
-// =============================================================================
-func RunCommand(cmd: Cmd, args: Array<String>) -> ExitResult {
-    if cmd.tag == Cmd_Help {
-        PrintUsage();
+    // =============================================================================
+    // Command: verify
+    // =============================================================================
+    func CmdVerify(token: String, algName: String, keyArg: String) -> ExitResult {
+        let algOpt: AlgOption = ParseAlg(algName);
+        if algOpt.tag != AlgOption_Some {
+            return ExitResult_MakeErr(f"ERROR: unknown algorithm '{algName}'");
+        }
+        let alg: JwtAlg = algOpt.data.Some_0;
+
+        let keyRes: KeyResult = ResolveKey(alg, keyArg);
+        if keyRes.tag != KeyResult_Ok {
+            return ExitResult_MakeErr(keyRes.data.Err_0);
+        }
+        let key: String = keyRes.data.Ok_0;
+
+        var header: String = "";
+        var payload: String = "";
+
+        if !Jwt_Decode(token, alg, key, &header, &payload) {
+            return ExitResult_MakeErr("✗ Signature INVALID (or malformed token)");
+        }
+
+        PrintLine("✓ Signature valid");
+        PrintLine("");
+        PrintLine("Header:");
+        PrintLine(header);
+        PrintLine("");
+        PrintLine("Payload:");
+        PrintLine(payload);
         return ExitResult_MakeOk(0);
     }
-    if cmd.tag == Cmd_Sign {
-        if args.len < 5 {
-            return ExitResult_MakeErr("ERROR: 'sign' requires: <alg> <key> <claims_json>");
+
+    // =============================================================================
+    // Command: decode (no verification)
+    // =============================================================================
+    func CmdDecode(token: String) -> ExitResult {
+        let partCount: uint = String_SplitCount(token, ".");
+        if partCount != 3 {
+            return ExitResult_MakeErr("ERROR: not a valid JWT (expected 3 parts)");
         }
-        return CmdSign(args[2], args[3], args[4]);
+
+        let headerB64: String = String_SplitPart(token, ".", 0);
+        let payloadB64: String = String_SplitPart(token, ".", 1);
+        let sigB64: String = String_SplitPart(token, ".", 2);
+
+        let headerJson: String = Base64URL_Decode(headerB64);
+        let payloadJson: String = Base64URL_Decode(payloadB64);
+
+        PrintLine("Decoded (no verification):");
+        PrintLine("");
+        PrintLine("Header:");
+        PrintLine(headerJson);
+        PrintLine("");
+        PrintLine("Payload:");
+        PrintLine(payloadJson);
+        PrintLine("");
+        Print("Signature (base64url): ");
+        PrintLine(sigB64);
+
+        return ExitResult_MakeOk(0);
     }
-    if cmd.tag == Cmd_Verify {
-        if args.len < 5 {
-            return ExitResult_MakeErr("ERROR: 'verify' requires: <token> <alg> <key>");
+
+    // =============================================================================
+    // Command: keygen
+    // =============================================================================
+    func CmdKeygen(keyType: String) -> ExitResult {
+        let ktOpt: KeyTypeOption = ParseKeyType(keyType);
+        if ktOpt.tag != KeyTypeOption_Some {
+            return ExitResult_MakeErr(f"ERROR: unknown key type '{keyType}'. Use: rsa, ecdsa, ed25519");
         }
-        return CmdVerify(args[2], args[3], args[4]);
-    }
-    if cmd.tag == Cmd_Decode {
-        if args.len < 3 {
-            return ExitResult_MakeErr("ERROR: 'decode' requires: <token>");
+        let kt: KeyType = ktOpt.data.Some_0;
+
+        if kt.tag == KeyType_Ed25519 {
+            let pubBuf: *void = bux_alloc(32);
+            let priv: *void = bux_alloc(32);
+            if !Ed25519_Keypair(pubBuf, priv) {
+                return ExitResult_MakeErr("ERROR: Ed25519 key generation failed (OpenSSL 1.1.1+ required)");
+            }
+            let pubB64: String = bux_base64_encode(pubBuf as String, 32);
+            let privB64: String = bux_base64_encode(priv as String, 32);
+            PrintLine("Ed25519 keypair (base64):");
+            PrintLine(f"  Public:  {pubB64}");
+            PrintLine(f"  Private: {privB64}");
+            return ExitResult_MakeOk(0);
         }
-        return CmdDecode(args[2]);
-    }
-    if cmd.tag == Cmd_Keygen {
-        if args.len < 3 {
-            return ExitResult_MakeErr("ERROR: 'keygen' requires: <type>");
+        if kt.tag == KeyType_Rsa {
+            PrintLine("RSA key generation requires OpenSSL CLI:");
+            PrintLine("  openssl genpkey -algorithm RSA -out private.pem -pkeyopt rsa_keygen_bits:2048");
+            PrintLine("  openssl rsa -in private.pem -pubout -out public.pem");
+            PrintLine("");
+            PrintLine("(Key generation from within Bux requires PEM write support — coming soon)");
+            return ExitResult_MakeOk(0);
         }
-        return CmdKeygen(args[2]);
-    }
-    return ExitResult_MakeErr("ERROR: unhandled command");
-}
-
-// =============================================================================
-// Main Entry Point
-// =============================================================================
-func Main() -> int {
-    let argc: int = bux_argc();
-
-    // Collect CLI arguments into a generic Array<String>
-    let args: Array<String> = Array_New<String>(argc as uint);
-    for i in 0..argc {
-        Array_Push<String>(&args, bux_argv(i));
+        if kt.tag == KeyType_Ecdsa {
+            PrintLine("ECDSA key generation requires OpenSSL CLI:");
+            PrintLine("  openssl ecparam -genkey -name prime256v1 -noout -out ec_private.pem");
+            PrintLine("  openssl ec -in ec_private.pem -pubout -out ec_public.pem");
+            PrintLine("");
+            PrintLine("(Key generation from within Bux requires PEM write support — coming soon)");
+            return ExitResult_MakeOk(0);
+        }
+        return ExitResult_MakeErr(f"ERROR: unknown key type '{keyType}'");
     }
 
-    if args.len < 2 {
-        PrintUsage();
-        return 0;
+    // =============================================================================
+    // Dispatch a parsed command to its handler
+    // =============================================================================
+    func RunCommand(cmd: Cmd, args: Array<String>) -> ExitResult {
+        if cmd.tag == Cmd_Help {
+            PrintUsage();
+            return ExitResult_MakeOk(0);
+        }
+        if cmd.tag == Cmd_Sign {
+            if args.len < 5 {
+                return ExitResult_MakeErr("ERROR: 'sign' requires: <alg> <key> <claims_json>");
+            }
+            return CmdSign(args[2], args[3], args[4]);
+        }
+        if cmd.tag == Cmd_Verify {
+            if args.len < 5 {
+                return ExitResult_MakeErr("ERROR: 'verify' requires: <token> <alg> <key>");
+            }
+            return CmdVerify(args[2], args[3], args[4]);
+        }
+        if cmd.tag == Cmd_Decode {
+            if args.len < 3 {
+                return ExitResult_MakeErr("ERROR: 'decode' requires: <token>");
+            }
+            return CmdDecode(args[2]);
+        }
+        if cmd.tag == Cmd_Keygen {
+            if args.len < 3 {
+                return ExitResult_MakeErr("ERROR: 'keygen' requires: <type>");
+            }
+            return CmdKeygen(args[2]);
+        }
+        return ExitResult_MakeErr("ERROR: unhandled command");
     }
 
-    let command: String = args[1];
-    let cmdOpt: CmdOption = ParseCmd(command);
-    if cmdOpt.tag != CmdOption_Some {
-        PrintLine(f"ERROR: unknown command '{command}'");
-        PrintLine(f"Run '{AppName} help' for usage.");
-        return 1;
-    }
-    let cmd: Cmd = cmdOpt.data.Some_0;
+    // =============================================================================
+    // Main Entry Point
+    // =============================================================================
+    func Main() -> int {
+        let argc: int = bux_argc();
 
-    let result: ExitResult = RunCommand(cmd, args);
-    if result.tag == ExitResult_Err {
-        PrintLine(result.data.Err_0);
-        return 1;
+        // Collect CLI arguments into a generic Array<String>
+        let args: Array<String> = Array_New<String>(argc as uint);
+        for i in 0..argc {
+            Array_Push<String>(&args, bux_argv(i));
+        }
+
+        if args.len < 2 {
+            PrintUsage();
+            return 0;
+        }
+
+        let command: String = args[1];
+        let cmdOpt: CmdOption = ParseCmd(command);
+        if cmdOpt.tag != CmdOption_Some {
+            PrintLine(f"ERROR: unknown command '{command}'");
+            PrintLine(f"Run '{AppName} help' for usage.");
+            return 1;
+        }
+        let cmd: Cmd = cmdOpt.data.Some_0;
+
+        let result: ExitResult = RunCommand(cmd, args);
+        if result.tag == ExitResult_Err {
+            PrintLine(result.data.Err_0);
+            return 1;
+        }
+        return result.data.Ok_0;
     }
-    return result.data.Ok_0;
-}
 
 } // module Main

apps/nexus/src/Config.bux

@@ -1,21 +1,21 @@
 module Config {
 
-pub struct ServerConfig {
-    bindAddr: String;
-    port: int;
-    workerCount: int;
-    publicDir: String;
-    backlog: int;
-}
+    pub struct ServerConfig {
+        bindAddr: String;
+        port: int;
+        workerCount: int;
+        publicDir: String;
+        backlog: int;
+    }
 
-pub const func DefaultConfig() -> ServerConfig {
-    return ServerConfig {
-        bindAddr: "0.0.0.0",
-        port: 8080,
-        workerCount: 4,
-        publicDir: "public",
-        backlog: 128,
-    };
-}
+    pub const func DefaultConfig() -> ServerConfig {
+        return ServerConfig {
+            bindAddr: "0.0.0.0",
+            port: 8080,
+            workerCount: 4,
+            publicDir: "public",
+            backlog: 128,
+        };
+    }
 
 }

apps/nexus/src/Errors.bux

@@ -1,65 +1,65 @@
 module Errors {
 
-import Http::{HttpRequest};
+    import Http::{HttpRequest};
 
-pub enum HttpError {
-    BadRequest,
-    NotFound,
-    MethodNotAllowed,
-    InternalError(String),
-}
+    pub enum HttpError {
+        BadRequest,
+        NotFound,
+        MethodNotAllowed,
+        InternalError(String),
+    }
 
-pub enum ParseResult {
-    Ok(HttpRequest),
-    Err(HttpError),
-}
+    pub enum ParseResult {
+        Ok(HttpRequest),
+        Err(HttpError),
+    }
 
-pub enum FileResult {
-    Ok(String),
-    Err(HttpError),
-}
+    pub enum FileResult {
+        Ok(String),
+        Err(HttpError),
+    }
 
-pub func ParseResult_NewOk(req: HttpRequest) -> ParseResult {
-    let r: ParseResult = ParseResult { tag: ParseResult_Ok };
-    r.data.Ok_0 = req;
-    return r;
-}
+    pub func ParseResult_NewOk(req: HttpRequest) -> ParseResult {
+        let r: ParseResult = ParseResult { tag: ParseResult_Ok };
+        r.data.Ok_0 = req;
+        return r;
+    }
 
-pub func ParseResult_NewErr(err: HttpError) -> ParseResult {
-    let r: ParseResult = ParseResult { tag: ParseResult_Err };
-    r.data.Err_0 = err;
-    return r;
-}
+    pub func ParseResult_NewErr(err: HttpError) -> ParseResult {
+        let r: ParseResult = ParseResult { tag: ParseResult_Err };
+        r.data.Err_0 = err;
+        return r;
+    }
 
-pub func FileResult_NewOk(content: String) -> FileResult {
-    let r: FileResult = FileResult { tag: FileResult_Ok };
-    r.data.Ok_0 = content;
-    return r;
-}
+    pub func FileResult_NewOk(content: String) -> FileResult {
+        let r: FileResult = FileResult { tag: FileResult_Ok };
+        r.data.Ok_0 = content;
+        return r;
+    }
 
-pub func FileResult_NewErr(err: HttpError) -> FileResult {
-    let r: FileResult = FileResult { tag: FileResult_Err };
-    r.data.Err_0 = err;
-    return r;
-}
+    pub func FileResult_NewErr(err: HttpError) -> FileResult {
+        let r: FileResult = FileResult { tag: FileResult_Err };
+        r.data.Err_0 = err;
+        return r;
+    }
 
-pub func FileResult_IsOk(r: FileResult) -> bool {
-    return r.tag == FileResult_Ok;
-}
+    pub func FileResult_IsOk(r: FileResult) -> bool {
+        return r.tag == FileResult_Ok;
+    }
 
-pub func FileResult_Unwrap(r: FileResult) -> String {
-    return r.data.Ok_0;
-}
+    pub func FileResult_Unwrap(r: FileResult) -> String {
+        return r.data.Ok_0;
+    }
 
-pub func FileResult_UnwrapErr(r: FileResult) -> HttpError {
-    return r.data.Err_0;
-}
+    pub func FileResult_UnwrapErr(r: FileResult) -> HttpError {
+        return r.data.Err_0;
+    }
 
-pub func HttpError_ToString(err: HttpError) -> String {
-    if err.tag == HttpError_BadRequest       { return "Bad Request"; }
-    if err.tag == HttpError_NotFound         { return "Not Found"; }
-    if err.tag == HttpError_MethodNotAllowed { return "Method Not Allowed"; }
-    return err.data.InternalError_0;
-}
+    pub func HttpError_ToString(err: HttpError) -> String {
+        if err.tag == HttpError_BadRequest       { return "Bad Request"; }
+        if err.tag == HttpError_NotFound         { return "Not Found"; }
+        if err.tag == HttpError_MethodNotAllowed { return "Method Not Allowed"; }
+        return err.data.InternalError_0;
+    }
 
 }

apps/nexus/src/Handlers.bux

@@ -1,94 +1,94 @@
 module Handlers {
 
-import Std::String::{String_Eq, String_Contains};
-import Http::{HttpMethod, HttpRequest, HttpResponse, Http_NewResponse, Http_MimeType, RequestHeader_Get};
-import Errors::{HttpError, FileResult, FileResult_NewOk, FileResult_NewErr, FileResult_IsOk, FileResult_Unwrap, FileResult_UnwrapErr, HttpError_ToString};
+    import Std::String::{String_Eq, String_Contains};
+    import Http::{HttpMethod, HttpRequest, HttpResponse, Http_NewResponse, Http_MimeType, RequestHeader_Get};
+    import Errors::{HttpError, FileResult, FileResult_NewOk, FileResult_NewErr, FileResult_IsOk, FileResult_Unwrap, FileResult_UnwrapErr, HttpError_ToString};
 
-extern func bux_strlen(s: String) -> uint;
-extern func bux_file_exists(path: String) -> int;
-extern func bux_read_file(path: String) -> String;
-extern func bux_path_join(a: String, b: String) -> String;
-extern func bux_sb_new(initial_cap: uint) -> *void;
-extern func bux_sb_append(sb: *void, s: String);
-extern func bux_sb_append_int(sb: *void, n: int64);
-extern func bux_sb_build(sb: *void) -> String;
-extern func bux_sb_free(sb: *void);
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_file_exists(path: String) -> int;
+    extern func bux_read_file(path: String) -> String;
+    extern func bux_path_join(a: String, b: String) -> String;
+    extern func bux_sb_new(initial_cap: uint) -> *void;
+    extern func bux_sb_append(sb: *void, s: String);
+    extern func bux_sb_append_int(sb: *void, n: int64);
+    extern func bux_sb_build(sb: *void) -> String;
+    extern func bux_sb_free(sb: *void);
 
-pub func NotFoundResponse() -> HttpResponse {
-    return Http_NewResponse(404, "application/json; charset=utf-8", "{\"error\":\"not_found\"}");
-}
-
-pub func MethodNotAllowedResponse() -> HttpResponse {
-    return Http_NewResponse(405, "text/plain; charset=utf-8", "Method Not Allowed");
-}
-
-pub func ReadStaticFile(requestPath: String) -> FileResult {
-    if String_Contains(requestPath, "..") {
-        return FileResult_NewErr(HttpError { tag: HttpError_NotFound });
+    pub func NotFoundResponse() -> HttpResponse {
+        return Http_NewResponse(404, "application/json; charset=utf-8", "{\"error\":\"not_found\"}");
     }
 
-    var filePath: String = requestPath;
-    if String_Eq(filePath, "/") {
-        filePath = "/index.html";
+    pub func MethodNotAllowedResponse() -> HttpResponse {
+        return Http_NewResponse(405, "text/plain; charset=utf-8", "Method Not Allowed");
     }
 
-    let fullPath: String = bux_path_join("public", filePath);
-    if bux_file_exists(fullPath) == 0 {
-        return FileResult_NewErr(HttpError { tag: HttpError_NotFound });
+    pub func ReadStaticFile(requestPath: String) -> FileResult {
+        if String_Contains(requestPath, "..") {
+            return FileResult_NewErr(HttpError { tag: HttpError_NotFound });
+        }
+
+        var filePath: String = requestPath;
+        if String_Eq(filePath, "/") {
+            filePath = "/index.html";
+        }
+
+        let fullPath: String = bux_path_join("public", filePath);
+        if bux_file_exists(fullPath) == 0 {
+            return FileResult_NewErr(HttpError { tag: HttpError_NotFound });
+        }
+
+        let content: String = bux_read_file(fullPath);
+        return FileResult_NewOk(content);
     }
 
-    let content: String = bux_read_file(fullPath);
-    return FileResult_NewOk(content);
-}
-
-func FileErrorResponse(err: HttpError) -> HttpResponse {
-    match err {
-        HttpError::NotFound => NotFoundResponse(),
-        _ => Http_NewResponse(500, "text/plain; charset=utf-8", HttpError_ToString(err)),
-    }
-}
-
-pub func ServeStaticFile(req: HttpRequest) -> HttpResponse {
-    if req.method != HttpMethod_GET && req.method != HttpMethod_HEAD {
-        return MethodNotAllowedResponse();
+    func FileErrorResponse(err: HttpError) -> HttpResponse {
+        match err {
+            HttpError::NotFound => NotFoundResponse(),
+            _ => Http_NewResponse(500, "text/plain; charset=utf-8", HttpError_ToString(err)),
+        }
     }
 
-    let result: FileResult = ReadStaticFile(req.path);
-    if FileResult_IsOk(result) {
-        let content: String = FileResult_Unwrap(result);
-        return Http_NewResponse(200, Http_MimeType(req.path), content);
-    }
-    return FileErrorResponse(FileResult_UnwrapErr(result));
-}
+    pub func ServeStaticFile(req: HttpRequest) -> HttpResponse {
+        if req.method != HttpMethod_GET && req.method != HttpMethod_HEAD {
+            return MethodNotAllowedResponse();
+        }
 
-pub func HandleApiHealth() -> HttpResponse {
-    return Http_NewResponse(200, "application/json; charset=utf-8",
+        let result: FileResult = ReadStaticFile(req.path);
+        if FileResult_IsOk(result) {
+            let content: String = FileResult_Unwrap(result);
+            return Http_NewResponse(200, Http_MimeType(req.path), content);
+        }
+        return FileErrorResponse(FileResult_UnwrapErr(result));
+    }
+
+    pub func HandleApiHealth() -> HttpResponse {
+        return Http_NewResponse(200, "application/json; charset=utf-8",
         "{\"status\":\"ok\",\"server\":\"Nexus\",\"version\":\"0.2.0\"}");
-}
+    }
 
-pub func HandleApiInfo() -> HttpResponse {
-    return Http_NewResponse(200, "application/json; charset=utf-8",
+    pub func HandleApiInfo() -> HttpResponse {
+        return Http_NewResponse(200, "application/json; charset=utf-8",
         "{\"name\":\"Nexus\",\"language\":\"Bux\",\"features\":[\"HTTP/1.1\",\"thread-pool\",\"algebraic-enums\"]}");
-}
+    }
 
-pub func HandleWebSocketUpgrade(req: HttpRequest) -> HttpResponse {
-    let wsKey: String = RequestHeader_Get(req, "Sec-WebSocket-Key");
+    pub func HandleWebSocketUpgrade(req: HttpRequest) -> HttpResponse {
+        let wsKey: String = RequestHeader_Get(req, "Sec-WebSocket-Key");
 
-    var resp: HttpResponse;
-    resp.statusCode = 101;
-    resp.contentType = "";
-    resp.body = "";
+        var resp: HttpResponse;
+        resp.statusCode = 101;
+        resp.contentType = "";
+        resp.body = "";
 
-    let sb: *void = bux_sb_new(256);
-    bux_sb_append(sb, "Upgrade: websocket\r\n");
-    bux_sb_append(sb, "Connection: Upgrade\r\n");
-    bux_sb_append(sb, "Sec-WebSocket-Accept: ");
-    bux_sb_append(sb, wsKey);
-    bux_sb_append(sb, "\r\n");
-    resp.extraHeaders = bux_sb_build(sb);
-    bux_sb_free(sb);
+        let sb: *void = bux_sb_new(256);
+        bux_sb_append(sb, "Upgrade: websocket\r\n");
+        bux_sb_append(sb, "Connection: Upgrade\r\n");
+        bux_sb_append(sb, "Sec-WebSocket-Accept: ");
+        bux_sb_append(sb, wsKey);
+        bux_sb_append(sb, "\r\n");
+        resp.extraHeaders = bux_sb_build(sb);
+        bux_sb_free(sb);
 
-    return resp;
-}
+        return resp;
+    }
 
 }

apps/nexus/src/Http.bux

@@ -1,107 +1,107 @@
 module Http {
 
-import Std::Array::{Array};
-import Std::String::{String_Eq, String_EndsWith, String_Contains};
+    import Std::Array::{Array};
+    import Std::String::{String_Eq, String_EndsWith, String_Contains};
 
-pub enum HttpMethod {
-    GET,
-    POST,
-    PUT,
-    DELETE,
-    PATCH,
-    HEAD,
-    OPTIONS,
-    UNKNOWN,
-}
-
-pub struct HeaderEntry {
-    key: String;
-    value: String;
-}
-
-pub struct HttpRequest {
-    method: HttpMethod;
-    path: String;
-    version: String;
-    body: String;
-    headers: Array<HeaderEntry>;
-}
-
-pub struct HttpResponse {
-    statusCode: int;
-    contentType: String;
-    body: String;
-    extraHeaders: String;
-}
-
-pub func Http_StatusText(code: int) -> String {
-    if code == 200 { return "OK"; }
-    if code == 201 { return "Created"; }
-    if code == 204 { return "No Content"; }
-    if code == 301 { return "Moved Permanently"; }
-    if code == 302 { return "Found"; }
-    if code == 304 { return "Not Modified"; }
-    if code == 400 { return "Bad Request"; }
-    if code == 401 { return "Unauthorized"; }
-    if code == 403 { return "Forbidden"; }
-    if code == 404 { return "Not Found"; }
-    if code == 405 { return "Method Not Allowed"; }
-    if code == 413 { return "Payload Too Large"; }
-    if code == 414 { return "URI Too Long"; }
-    if code == 500 { return "Internal Server Error"; }
-    if code == 501 { return "Not Implemented"; }
-    if code == 503 { return "Service Unavailable"; }
-    return "Unknown";
-}
-
-pub func Http_MimeType(path: String) -> String {
-    if String_EndsWith(path, ".html") || String_EndsWith(path, ".htm") { return "text/html; charset=utf-8"; }
-    if String_EndsWith(path, ".css")   { return "text/css; charset=utf-8"; }
-    if String_EndsWith(path, ".js")    { return "application/javascript; charset=utf-8"; }
-    if String_EndsWith(path, ".json")  { return "application/json; charset=utf-8"; }
-    if String_EndsWith(path, ".xml")   { return "application/xml; charset=utf-8"; }
-    if String_EndsWith(path, ".txt")   { return "text/plain; charset=utf-8"; }
-    if String_EndsWith(path, ".png")   { return "image/png"; }
-    if String_EndsWith(path, ".jpg") || String_EndsWith(path, ".jpeg") { return "image/jpeg"; }
-    if String_EndsWith(path, ".gif")   { return "image/gif"; }
-    if String_EndsWith(path, ".svg")   { return "image/svg+xml"; }
-    if String_EndsWith(path, ".ico")   { return "image/x-icon"; }
-    if String_EndsWith(path, ".webp")  { return "image/webp"; }
-    if String_EndsWith(path, ".woff2") { return "font/woff2"; }
-    if String_EndsWith(path, ".woff")  { return "font/woff"; }
-    if String_EndsWith(path, ".wasm")  { return "application/wasm"; }
-    return "application/octet-stream";
-}
-
-pub func Http_MethodName(m: HttpMethod) -> String {
-    match m {
-        HttpMethod::GET     => "GET",
-        HttpMethod::POST    => "POST",
-        HttpMethod::PUT     => "PUT",
-        HttpMethod::DELETE  => "DELETE",
-        HttpMethod::PATCH   => "PATCH",
-        HttpMethod::HEAD    => "HEAD",
-        HttpMethod::OPTIONS => "OPTIONS",
-        HttpMethod::UNKNOWN => "UNKNOWN",
+    pub enum HttpMethod {
+        GET,
+        POST,
+        PUT,
+        DELETE,
+        PATCH,
+        HEAD,
+        OPTIONS,
+        UNKNOWN,
     }
-}
 
-pub func Http_NewResponse(code: int, contentType: String, body: String) -> HttpResponse {
-    var resp: HttpResponse;
-    resp.statusCode = code;
-    resp.contentType = contentType;
-    resp.body = body;
-    resp.extraHeaders = "";
-    return resp;
-}
+    pub struct HeaderEntry {
+        key: String;
+        value: String;
+    }
 
-pub func RequestHeader_Get(req: HttpRequest, key: String) -> String {
-    for entry in req.headers {
-        if String_Eq(entry.key, key) {
-            return entry.value;
+    pub struct HttpRequest {
+        method: HttpMethod;
+        path: String;
+        version: String;
+        body: String;
+        headers: Array<HeaderEntry>;
+    }
+
+    pub struct HttpResponse {
+        statusCode: int;
+        contentType: String;
+        body: String;
+        extraHeaders: String;
+    }
+
+    pub func Http_StatusText(code: int) -> String {
+        if code == 200 { return "OK"; }
+        if code == 201 { return "Created"; }
+        if code == 204 { return "No Content"; }
+        if code == 301 { return "Moved Permanently"; }
+        if code == 302 { return "Found"; }
+        if code == 304 { return "Not Modified"; }
+        if code == 400 { return "Bad Request"; }
+        if code == 401 { return "Unauthorized"; }
+        if code == 403 { return "Forbidden"; }
+        if code == 404 { return "Not Found"; }
+        if code == 405 { return "Method Not Allowed"; }
+        if code == 413 { return "Payload Too Large"; }
+        if code == 414 { return "URI Too Long"; }
+        if code == 500 { return "Internal Server Error"; }
+        if code == 501 { return "Not Implemented"; }
+        if code == 503 { return "Service Unavailable"; }
+        return "Unknown";
+    }
+
+    pub func Http_MimeType(path: String) -> String {
+        if String_EndsWith(path, ".html") || String_EndsWith(path, ".htm") { return "text/html; charset=utf-8"; }
+        if String_EndsWith(path, ".css")   { return "text/css; charset=utf-8"; }
+        if String_EndsWith(path, ".js")    { return "application/javascript; charset=utf-8"; }
+        if String_EndsWith(path, ".json")  { return "application/json; charset=utf-8"; }
+        if String_EndsWith(path, ".xml")   { return "application/xml; charset=utf-8"; }
+        if String_EndsWith(path, ".txt")   { return "text/plain; charset=utf-8"; }
+        if String_EndsWith(path, ".png")   { return "image/png"; }
+        if String_EndsWith(path, ".jpg") || String_EndsWith(path, ".jpeg") { return "image/jpeg"; }
+        if String_EndsWith(path, ".gif")   { return "image/gif"; }
+        if String_EndsWith(path, ".svg")   { return "image/svg+xml"; }
+        if String_EndsWith(path, ".ico")   { return "image/x-icon"; }
+        if String_EndsWith(path, ".webp")  { return "image/webp"; }
+        if String_EndsWith(path, ".woff2") { return "font/woff2"; }
+        if String_EndsWith(path, ".woff")  { return "font/woff"; }
+        if String_EndsWith(path, ".wasm")  { return "application/wasm"; }
+        return "application/octet-stream";
+    }
+
+    pub func Http_MethodName(m: HttpMethod) -> String {
+        match m {
+            HttpMethod::GET     => "GET",
+            HttpMethod::POST    => "POST",
+            HttpMethod::PUT     => "PUT",
+            HttpMethod::DELETE  => "DELETE",
+            HttpMethod::PATCH   => "PATCH",
+            HttpMethod::HEAD    => "HEAD",
+            HttpMethod::OPTIONS => "OPTIONS",
+            HttpMethod::UNKNOWN => "UNKNOWN",
         }
     }
-    return "";
-}
+
+    pub func Http_NewResponse(code: int, contentType: String, body: String) -> HttpResponse {
+        var resp: HttpResponse;
+        resp.statusCode = code;
+        resp.contentType = contentType;
+        resp.body = body;
+        resp.extraHeaders = "";
+        return resp;
+    }
+
+    pub func RequestHeader_Get(req: HttpRequest, key: String) -> String {
+        for entry in req.headers {
+            if String_Eq(entry.key, key) {
+                return entry.value;
+            }
+        }
+        return "";
+    }
 
 }

apps/nexus/src/Main.bux

@@ -1,49 +1,49 @@
 module Main {
 
-import Config::{ServerConfig, DefaultConfig};
-import Http::{HttpMethod};
-import Router::{Handler, Route, Router};
-import Server::{RunServer};
-import Std::Array::{Array, Array_New, Array_Push};
+    import Config::{ServerConfig, DefaultConfig};
+    import Http::{HttpMethod};
+    import Router::{Handler, Route, Router};
+    import Server::{RunServer};
+    import Std::Array::{Array, Array_New, Array_Push};
 
-func BuildRouter() -> Router {
-    var routes: Array<Route> = Array_New<Route>(8);
+    func BuildRouter() -> Router {
+        var routes: Array<Route> = Array_New<Route>(8);
 
-    Array_Push<Route>(&routes, Route {
-        method: HttpMethod { tag: HttpMethod_GET },
-        path: "/api/health",
-        handler: Handler { tag: Handler_ApiHealth },
-    });
+        Array_Push<Route>(&routes, Route {
+            method: HttpMethod { tag: HttpMethod_GET },
+            path: "/api/health",
+            handler: Handler { tag: Handler_ApiHealth },
+        });
 
-    Array_Push<Route>(&routes, Route {
-        method: HttpMethod { tag: HttpMethod_GET },
-        path: "/api/info",
-        handler: Handler { tag: Handler_ApiInfo },
-    });
+        Array_Push<Route>(&routes, Route {
+            method: HttpMethod { tag: HttpMethod_GET },
+            path: "/api/info",
+            handler: Handler { tag: Handler_ApiInfo },
+        });
 
-    Array_Push<Route>(&routes, Route {
-        method: HttpMethod { tag: HttpMethod_GET },
-        path: "/ws",
-        handler: Handler { tag: Handler_WsUpgrade },
-    });
+        Array_Push<Route>(&routes, Route {
+            method: HttpMethod { tag: HttpMethod_GET },
+            path: "/ws",
+            handler: Handler { tag: Handler_WsUpgrade },
+        });
 
-    Array_Push<Route>(&routes, Route {
-        method: HttpMethod { tag: HttpMethod_GET },
-        path: "/",
-        handler: Handler { tag: Handler_StaticFile },
-    });
+        Array_Push<Route>(&routes, Route {
+            method: HttpMethod { tag: HttpMethod_GET },
+            path: "/",
+            handler: Handler { tag: Handler_StaticFile },
+        });
 
-    return Router {
-        routes: routes,
-        notFound: Handler { tag: Handler_NotFound },
-    };
-}
+        return Router {
+            routes: routes,
+            notFound: Handler { tag: Handler_NotFound },
+        };
+    }
 
-func Main() -> int {
-    let config: ServerConfig = DefaultConfig();
-    let router: Router = BuildRouter();
+    func Main() -> int {
+        let config: ServerConfig = DefaultConfig();
+        let router: Router = BuildRouter();
 
-    return RunServer(config, router);
-}
+        return RunServer(config, router);
+    }
 
 }

apps/nexus/src/Parser.bux

@@ -1,130 +1,130 @@
 module Parser {
 
-import Std::String::{String_Len, String_Eq, String_Trim};
-import Std::Array::{Array, Array_New, Array_Push};
-import Http::{HttpMethod, HttpRequest, HeaderEntry};
-import Errors::{HttpError, ParseResult, ParseResult_NewOk, ParseResult_NewErr};
+    import Std::String::{String_Len, String_Eq, String_Trim};
+    import Std::Array::{Array, Array_New, Array_Push};
+    import Http::{HttpMethod, HttpRequest, HeaderEntry};
+    import Errors::{HttpError, ParseResult, ParseResult_NewOk, ParseResult_NewErr};
 
-extern func bux_strlen(s: String) -> uint;
-extern func bux_strstr(haystack: String, needle: String) -> String;
-extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
-extern func bux_str_offset(pos: String, base: String) -> uint;
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_strstr(haystack: String, needle: String) -> String;
+    extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
+    extern func bux_str_offset(pos: String, base: String) -> uint;
 
-pub func ParseMethod(s: String) -> HttpMethod {
-    if String_Eq(s, "GET")     { return HttpMethod { tag: HttpMethod_GET }; }
-    if String_Eq(s, "POST")    { return HttpMethod { tag: HttpMethod_POST }; }
-    if String_Eq(s, "PUT")     { return HttpMethod { tag: HttpMethod_PUT }; }
-    if String_Eq(s, "DELETE")  { return HttpMethod { tag: HttpMethod_DELETE }; }
-    if String_Eq(s, "PATCH")   { return HttpMethod { tag: HttpMethod_PATCH }; }
-    if String_Eq(s, "HEAD")    { return HttpMethod { tag: HttpMethod_HEAD }; }
-    if String_Eq(s, "OPTIONS") { return HttpMethod { tag: HttpMethod_OPTIONS }; }
-    return HttpMethod { tag: HttpMethod_UNKNOWN };
-}
+    pub func ParseMethod(s: String) -> HttpMethod {
+        if String_Eq(s, "GET")     { return HttpMethod { tag: HttpMethod_GET }; }
+        if String_Eq(s, "POST")    { return HttpMethod { tag: HttpMethod_POST }; }
+        if String_Eq(s, "PUT")     { return HttpMethod { tag: HttpMethod_PUT }; }
+        if String_Eq(s, "DELETE")  { return HttpMethod { tag: HttpMethod_DELETE }; }
+        if String_Eq(s, "PATCH")   { return HttpMethod { tag: HttpMethod_PATCH }; }
+        if String_Eq(s, "HEAD")    { return HttpMethod { tag: HttpMethod_HEAD }; }
+        if String_Eq(s, "OPTIONS") { return HttpMethod { tag: HttpMethod_OPTIONS }; }
+        return HttpMethod { tag: HttpMethod_UNKNOWN };
+    }
 
-func Slice(raw: String, start: int, len: int) -> String {
-    if start < 0 || len <= 0 { return ""; }
-    return bux_str_slice(raw, start as uint, len as uint);
-}
+    func Slice(raw: String, start: int, len: int) -> String {
+        if start < 0 || len <= 0 { return ""; }
+        return bux_str_slice(raw, start as uint, len as uint);
+    }
 
-func FindCrlf(raw: String, start: int) -> int {
-    let rawLen: uint = bux_strlen(raw);
-    if start as uint >= rawLen { return -1; }
-    let tail: String = bux_str_slice(raw, start as uint, rawLen - start as uint);
-    let hit: String = bux_strstr(tail, "\r\n");
-    if String_Len(hit) == 0 { return -1; }
-    let offset: uint = bux_str_offset(hit, tail);
-    return start + offset as int;
-}
+    func FindCrlf(raw: String, start: int) -> int {
+        let rawLen: uint = bux_strlen(raw);
+        if start as uint >= rawLen { return -1; }
+        let tail: String = bux_str_slice(raw, start as uint, rawLen - start as uint);
+        let hit: String = bux_strstr(tail, "\r\n");
+        if String_Len(hit) == 0 { return -1; }
+        let offset: uint = bux_str_offset(hit, tail);
+        return start + offset as int;
+    }
 
-func ParseHeaders(raw: String, start: int, end: int) -> Array<HeaderEntry> {
-    var headers: Array<HeaderEntry> = Array_New<HeaderEntry>(16);
-    var pos: int = start;
-    while pos < end {
-        let lineEnd: int = FindCrlf(raw, pos);
-        if lineEnd < 0 || lineEnd >= end { break; }
-        let lineLen: int = lineEnd - pos;
-        if lineLen > 0 {
-            let line: String = Slice(raw, pos, lineLen);
-            let colon: String = bux_strstr(line, ":");
-            if String_Len(colon) > 0 {
-                let keyLen: uint = bux_str_offset(colon, line);
-                let key: String = String_Trim(Slice(line, 0, keyLen as int));
-                let valStart: int = keyLen as int + 1;
-                let val: String = String_Trim(Slice(line, valStart, lineLen - valStart));
-                let entry: HeaderEntry = HeaderEntry { key: key, value: val };
-                Array_Push<HeaderEntry>(&headers, entry);
+    func ParseHeaders(raw: String, start: int, end: int) -> Array<HeaderEntry> {
+        var headers: Array<HeaderEntry> = Array_New<HeaderEntry>(16);
+        var pos: int = start;
+        while pos < end {
+            let lineEnd: int = FindCrlf(raw, pos);
+            if lineEnd < 0 || lineEnd >= end { break; }
+            let lineLen: int = lineEnd - pos;
+            if lineLen > 0 {
+                let line: String = Slice(raw, pos, lineLen);
+                let colon: String = bux_strstr(line, ":");
+                if String_Len(colon) > 0 {
+                    let keyLen: uint = bux_str_offset(colon, line);
+                    let key: String = String_Trim(Slice(line, 0, keyLen as int));
+                    let valStart: int = keyLen as int + 1;
+                    let val: String = String_Trim(Slice(line, valStart, lineLen - valStart));
+                    let entry: HeaderEntry = HeaderEntry { key: key, value: val };
+                    Array_Push<HeaderEntry>(&headers, entry);
+                }
             }
+            pos = lineEnd + 2;
         }
-        pos = lineEnd + 2;
-    }
-    return headers;
-}
-
-pub func ParseRequest(raw: String) -> ParseResult {
-    let rawLen: uint = bux_strlen(raw);
-    if rawLen == 0 {
-        return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
+        return headers;
     }
 
-    // Find end of request line
-    let lineEnd: int = FindCrlf(raw, 0);
-    if lineEnd < 0 {
-        return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
-    }
+    pub func ParseRequest(raw: String) -> ParseResult {
+        let rawLen: uint = bux_strlen(raw);
+        if rawLen == 0 {
+            return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
+        }
 
-    // Split request line: METHOD PATH VERSION
-    var methodEnd: int = -1;
-    var pathStart: int = -1;
-    var pathEnd: int = -1;
-    var i: int = 0;
-    while i < lineEnd {
-        if raw[i] as int == 32 {  // space
-            if methodEnd < 0 {
-                methodEnd = i;
-                pathStart = i + 1;
-            } else if pathEnd < 0 {
-                pathEnd = i;
-                break;
+        // Find end of request line
+        let lineEnd: int = FindCrlf(raw, 0);
+        if lineEnd < 0 {
+            return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
+        }
+
+        // Split request line: METHOD PATH VERSION
+        var methodEnd: int = -1;
+        var pathStart: int = -1;
+        var pathEnd: int = -1;
+        var i: int = 0;
+        while i < lineEnd {
+            if raw[i] as int == 32 {  // space
+                if methodEnd < 0 {
+                    methodEnd = i;
+                    pathStart = i + 1;
+                } else if pathEnd < 0 {
+                    pathEnd = i;
+                    break;
+                }
             }
+            i = i + 1;
         }
-        i = i + 1;
-    }
 
-    if methodEnd < 0 || pathStart < 0 || pathEnd < 0 {
-        return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
-    }
-
-    let methodStr: String = Slice(raw, 0, methodEnd);
-    let path: String = Slice(raw, pathStart, pathEnd - pathStart);
-    let version: String = Slice(raw, pathEnd + 1, lineEnd - pathEnd - 1);
-
-    // Find header/body boundary
-    let boundary: String = bux_strstr(raw, "\r\n\r\n");
-    var headers: Array<HeaderEntry> = Array_New<HeaderEntry>(16);
-    var body: String = "";
-    if String_Len(boundary) > 0 {
-        let headerEnd: uint = bux_str_offset(boundary, raw);
-        headers = ParseHeaders(raw, lineEnd + 2, headerEnd as int);
-        let bodyStart: uint = headerEnd + 4;
-        if bodyStart < rawLen {
-            body = bux_str_slice(raw, bodyStart, rawLen - bodyStart);
+        if methodEnd < 0 || pathStart < 0 || pathEnd < 0 {
+            return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
         }
-    } else {
-        headers = ParseHeaders(raw, lineEnd + 2, rawLen as int);
-    }
 
-    if String_Eq(path, "") {
-        return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
-    }
+        let methodStr: String = Slice(raw, 0, methodEnd);
+        let path: String = Slice(raw, pathStart, pathEnd - pathStart);
+        let version: String = Slice(raw, pathEnd + 1, lineEnd - pathEnd - 1);
 
-    let req: HttpRequest = HttpRequest {
-        method: ParseMethod(methodStr),
-        path: path,
-        version: version,
-        body: body,
-        headers: headers,
-    };
-    return ParseResult_NewOk(req);
-}
+        // Find header/body boundary
+        let boundary: String = bux_strstr(raw, "\r\n\r\n");
+        var headers: Array<HeaderEntry> = Array_New<HeaderEntry>(16);
+        var body: String = "";
+        if String_Len(boundary) > 0 {
+            let headerEnd: uint = bux_str_offset(boundary, raw);
+            headers = ParseHeaders(raw, lineEnd + 2, headerEnd as int);
+            let bodyStart: uint = headerEnd + 4;
+            if bodyStart < rawLen {
+                body = bux_str_slice(raw, bodyStart, rawLen - bodyStart);
+            }
+        } else {
+            headers = ParseHeaders(raw, lineEnd + 2, rawLen as int);
+        }
+
+        if String_Eq(path, "") {
+            return ParseResult_NewErr(HttpError { tag: HttpError_BadRequest });
+        }
+
+        let req: HttpRequest = HttpRequest {
+            method: ParseMethod(methodStr),
+            path: path,
+            version: version,
+            body: body,
+            headers: headers,
+        };
+        return ParseResult_NewOk(req);
+    }
 
 }

apps/nexus/src/Router.bux

@@ -1,46 +1,46 @@
 module Router {
 
-import Std::Array::{Array};
-import Std::String::{String_Eq};
-import Http::{HttpMethod, HttpRequest, HttpResponse, Http_NewResponse};
-import Handlers::{ServeStaticFile, HandleApiHealth, HandleApiInfo, HandleWebSocketUpgrade, NotFoundResponse};
+    import Std::Array::{Array};
+    import Std::String::{String_Eq};
+    import Http::{HttpMethod, HttpRequest, HttpResponse, Http_NewResponse};
+    import Handlers::{ServeStaticFile, HandleApiHealth, HandleApiInfo, HandleWebSocketUpgrade, NotFoundResponse};
 
-pub enum Handler {
-    StaticFile,
-    ApiHealth,
-    ApiInfo,
-    WsUpgrade,
-    NotFound,
-}
-
-pub struct Route {
-    method: HttpMethod;
-    path: String;
-    handler: Handler;
-}
-
-pub struct Router {
-    routes: Array<Route>;
-    notFound: Handler;
-}
-
-pub func Handler_Handle(h: Handler, req: HttpRequest) -> HttpResponse {
-    match h {
-        Handler::StaticFile => ServeStaticFile(req),
-        Handler::ApiHealth  => HandleApiHealth(),
-        Handler::ApiInfo    => HandleApiInfo(),
-        Handler::WsUpgrade  => HandleWebSocketUpgrade(req),
-        Handler::NotFound   => NotFoundResponse(),
+    pub enum Handler {
+        StaticFile,
+        ApiHealth,
+        ApiInfo,
+        WsUpgrade,
+        NotFound,
     }
-}
 
-pub func Router_Dispatch(r: Router, req: HttpRequest) -> HttpResponse {
-    for route in r.routes {
-        if route.method == req.method && String_Eq(route.path, req.path) {
-            return Handler_Handle(route.handler, req);
+    pub struct Route {
+        method: HttpMethod;
+        path: String;
+        handler: Handler;
+    }
+
+    pub struct Router {
+        routes: Array<Route>;
+        notFound: Handler;
+    }
+
+    pub func Handler_Handle(h: Handler, req: HttpRequest) -> HttpResponse {
+        match h {
+            Handler::StaticFile => ServeStaticFile(req),
+            Handler::ApiHealth  => HandleApiHealth(),
+            Handler::ApiInfo    => HandleApiInfo(),
+            Handler::WsUpgrade  => HandleWebSocketUpgrade(req),
+            Handler::NotFound   => NotFoundResponse(),
         }
     }
-    return Handler_Handle(r.notFound, req);
-}
+
+    pub func Router_Dispatch(r: Router, req: HttpRequest) -> HttpResponse {
+        for route in r.routes {
+            if route.method == req.method && String_Eq(route.path, req.path) {
+                return Handler_Handle(route.handler, req);
+            }
+        }
+        return Handler_Handle(r.notFound, req);
+    }
 
 }

apps/nexus/src/Server.bux

@@ -1,176 +1,176 @@
 module Server {
 
-import Std::Io::{Print, PrintLine, PrintInt};
-import Std::Net::{Net_Create, Net_SetReuse, Net_Bind, Net_Listen, Net_Accept, Net_Send, Net_Recv, Net_Close, Net_LastError};
-import Std::String::{String_Len, String_StartsWith};
-import Std::Channel::{Channel, Channel_New, Channel_Send, Channel_Recv};
-import Config::{ServerConfig};
-import Http::{HttpRequest, HttpResponse, Http_StatusText, Http_NewResponse};
-import Errors::{ParseResult};
-import Parser::{ParseRequest};
-import Router::{Router, Router_Dispatch};
+    import Std::Io::{Print, PrintLine, PrintInt};
+    import Std::Net::{Net_Create, Net_SetReuse, Net_Bind, Net_Listen, Net_Accept, Net_Send, Net_Recv, Net_Close, Net_LastError};
+    import Std::String::{String_Len, String_StartsWith};
+    import Std::Channel::{Channel, Channel_New, Channel_Send, Channel_Recv};
+    import Config::{ServerConfig};
+    import Http::{HttpRequest, HttpResponse, Http_StatusText, Http_NewResponse};
+    import Errors::{ParseResult};
+    import Parser::{ParseRequest};
+    import Router::{Router, Router_Dispatch};
 
-extern func bux_strlen(s: String) -> uint;
-extern func bux_sb_new(initial_cap: uint) -> *void;
-extern func bux_sb_append(sb: *void, s: String);
-extern func bux_sb_append_int(sb: *void, n: int64);
-extern func bux_sb_build(sb: *void) -> String;
-extern func bux_sb_free(sb: *void);
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_sb_new(initial_cap: uint) -> *void;
+    extern func bux_sb_append(sb: *void, s: String);
+    extern func bux_sb_append_int(sb: *void, n: int64);
+    extern func bux_sb_build(sb: *void) -> String;
+    extern func bux_sb_free(sb: *void);
 
-pub struct ConnectionTask {
-    fd: int;
-}
-
-pub func BuildResponse(resp: HttpResponse) -> String {
-    let sb: *void = bux_sb_new(4096);
-
-    bux_sb_append(sb, "HTTP/1.1 ");
-    bux_sb_append_int(sb, resp.statusCode as int64);
-    bux_sb_append(sb, " ");
-    bux_sb_append(sb, Http_StatusText(resp.statusCode));
-    bux_sb_append(sb, "\r\n");
-
-    bux_sb_append(sb, "Server: Nexus/0.2.0 (Bux)\r\n");
-
-    if bux_strlen(resp.extraHeaders) > 0 {
-        bux_sb_append(sb, resp.extraHeaders);
+    pub struct ConnectionTask {
+        fd: int;
     }
 
-    if bux_strlen(resp.contentType) > 0 {
-        bux_sb_append(sb, "Content-Type: ");
-        bux_sb_append(sb, resp.contentType);
+    pub func BuildResponse(resp: HttpResponse) -> String {
+        let sb: *void = bux_sb_new(4096);
+
+        bux_sb_append(sb, "HTTP/1.1 ");
+        bux_sb_append_int(sb, resp.statusCode as int64);
+        bux_sb_append(sb, " ");
+        bux_sb_append(sb, Http_StatusText(resp.statusCode));
         bux_sb_append(sb, "\r\n");
+
+        bux_sb_append(sb, "Server: Nexus/0.2.0 (Bux)\r\n");
+
+        if bux_strlen(resp.extraHeaders) > 0 {
+            bux_sb_append(sb, resp.extraHeaders);
+        }
+
+        if bux_strlen(resp.contentType) > 0 {
+            bux_sb_append(sb, "Content-Type: ");
+            bux_sb_append(sb, resp.contentType);
+            bux_sb_append(sb, "\r\n");
+        }
+
+        let bodyLen: uint = bux_strlen(resp.body);
+        bux_sb_append(sb, "Content-Length: ");
+        bux_sb_append_int(sb, bodyLen as int64);
+        bux_sb_append(sb, "\r\n");
+        bux_sb_append(sb, "Connection: close\r\n");
+        bux_sb_append(sb, "\r\n");
+
+        if bodyLen > 0 {
+            bux_sb_append(sb, resp.body);
+        }
+
+        let result: String = bux_sb_build(sb);
+        bux_sb_free(sb);
+        return result;
     }
 
-    let bodyLen: uint = bux_strlen(resp.body);
-    bux_sb_append(sb, "Content-Length: ");
-    bux_sb_append_int(sb, bodyLen as int64);
-    bux_sb_append(sb, "\r\n");
-    bux_sb_append(sb, "Connection: close\r\n");
-    bux_sb_append(sb, "\r\n");
+    pub func HandleConnection(fd: int, router: Router) {
+        let raw: String = Net_Recv(fd, 8192);
+        if String_Len(raw) == 0 {
+            return;
+        }
 
-    if bodyLen > 0 {
-        bux_sb_append(sb, resp.body);
-    }
-
-    let result: String = bux_sb_build(sb);
-    bux_sb_free(sb);
-    return result;
-}
-
-pub func HandleConnection(fd: int, router: Router) {
-    let raw: String = Net_Recv(fd, 8192);
-    if String_Len(raw) == 0 {
-        return;
-    }
-
-    // HTTP/2 preface detection
-    if String_StartsWith(raw, "PRI * HTTP/2.0") {
-        let resp: HttpResponse = Http_NewResponse(200, "text/plain; charset=utf-8",
+        // HTTP/2 preface detection
+        if String_StartsWith(raw, "PRI * HTTP/2.0") {
+            let resp: HttpResponse = Http_NewResponse(200, "text/plain; charset=utf-8",
             "HTTP/2 detected — full support planned for future release.\r\n");
-        Net_Send(fd, BuildResponse(resp));
-        return;
-    }
+            Net_Send(fd, BuildResponse(resp));
+            return;
+        }
 
-    let parsed: ParseResult = ParseRequest(raw);
-    if parsed.tag == ParseResult_Ok {
-        let req: HttpRequest = parsed.data.Ok_0;
-        let resp: HttpResponse = Router_Dispatch(router, req);
-        Net_Send(fd, BuildResponse(resp));
-    } else {
-        let resp: HttpResponse = Http_NewResponse(400, "text/plain; charset=utf-8", "Bad Request");
-        Net_Send(fd, BuildResponse(resp));
-    }
-}
-
-pub struct WorkerCtx {
-    taskQueue: *Channel<ConnectionTask>;
-    router: Router;
-}
-
-pub func Worker(ctx: *WorkerCtx) {
-    while true {
-        let task: ConnectionTask = Channel_Recv<ConnectionTask>(ctx.taskQueue);
-        HandleConnection(task.fd, ctx.router);
-        Net_Close(task.fd);
-    }
-}
-
-pub struct AcceptorCtx {
-    serverFd: int;
-    taskQueue: *Channel<ConnectionTask>;
-}
-
-pub func Acceptor(ctx: *AcceptorCtx) {
-    while true {
-        let fd: int = Net_Accept(ctx.serverFd);
-        if fd >= 0 {
-            let task: ConnectionTask = ConnectionTask { fd: fd };
-            Channel_Send<ConnectionTask>(ctx.taskQueue, task);
+        let parsed: ParseResult = ParseRequest(raw);
+        if parsed.tag == ParseResult_Ok {
+            let req: HttpRequest = parsed.data.Ok_0;
+            let resp: HttpResponse = Router_Dispatch(router, req);
+            Net_Send(fd, BuildResponse(resp));
+        } else {
+            let resp: HttpResponse = Http_NewResponse(400, "text/plain; charset=utf-8", "Bad Request");
+            Net_Send(fd, BuildResponse(resp));
         }
     }
-}
 
-pub func RunServer(config: ServerConfig, router: Router) -> int {
-    PrintLine("================================================");
-    PrintLine("  Nexus HTTP Server v0.2.0");
-    PrintLine("  Production-ready HTTP/1.1 with thread-pool");
-    PrintLine("  Built with Bux");
-    PrintLine("================================================");
-    PrintLine("");
-
-    let serverFd: int = Net_Create();
-    if serverFd < 0 {
-        PrintLine("FATAL: socket() failed");
-        return 1;
+    pub struct WorkerCtx {
+        taskQueue: *Channel<ConnectionTask>;
+        router: Router;
     }
 
-    if !Net_SetReuse(serverFd) {
-        PrintLine("WARN: SO_REUSEADDR failed");
+    pub func Worker(ctx: *WorkerCtx) {
+        while true {
+            let task: ConnectionTask = Channel_Recv<ConnectionTask>(ctx.taskQueue);
+            HandleConnection(task.fd, ctx.router);
+            Net_Close(task.fd);
+        }
     }
 
-    if !Net_Bind(serverFd, config.bindAddr, config.port) {
-        Print("FATAL: bind failed: ");
-        PrintLine(Net_LastError());
-        Net_Close(serverFd);
-        return 1;
+    pub struct AcceptorCtx {
+        serverFd: int;
+        taskQueue: *Channel<ConnectionTask>;
     }
 
-    if !Net_Listen(serverFd, config.backlog) {
-        PrintLine("FATAL: listen() failed");
-        Net_Close(serverFd);
-        return 1;
+    pub func Acceptor(ctx: *AcceptorCtx) {
+        while true {
+            let fd: int = Net_Accept(ctx.serverFd);
+            if fd >= 0 {
+                let task: ConnectionTask = ConnectionTask { fd: fd };
+                Channel_Send<ConnectionTask>(ctx.taskQueue, task);
+            }
+        }
     }
 
-    Print("Listening on http://");
-    Print(config.bindAddr);
-    Print(":");
-    PrintInt(config.port);
-    PrintLine("");
-    PrintInt(config.workerCount);
-    PrintLine(" worker threads  |  static: ./public/");
-    PrintLine("Endpoints:  /  /api/health  /api/info  /ws");
-    PrintLine("Press Ctrl+C to stop.");
-    PrintLine("");
+    pub func RunServer(config: ServerConfig, router: Router) -> int {
+        PrintLine("================================================");
+        PrintLine("  Nexus HTTP Server v0.2.0");
+        PrintLine("  Production-ready HTTP/1.1 with thread-pool");
+        PrintLine("  Built with Bux");
+        PrintLine("================================================");
+        PrintLine("");
 
-    let taskQueue: Channel<ConnectionTask> = Channel_New<ConnectionTask>(config.backlog as int64);
-    let workerCtx: WorkerCtx = WorkerCtx { taskQueue: &taskQueue, router: router };
-    let acceptorCtx: AcceptorCtx = AcceptorCtx { serverFd: serverFd, taskQueue: &taskQueue };
+        let serverFd: int = Net_Create();
+        if serverFd < 0 {
+            PrintLine("FATAL: socket() failed");
+            return 1;
+        }
 
-    // Spawn workers (main thread will also become one)
-    var i: int = 0;
-    while i < config.workerCount - 1 {
-        spawn Worker(&workerCtx);
-        i = i + 1;
+        if !Net_SetReuse(serverFd) {
+            PrintLine("WARN: SO_REUSEADDR failed");
+        }
+
+        if !Net_Bind(serverFd, config.bindAddr, config.port) {
+            Print("FATAL: bind failed: ");
+            PrintLine(Net_LastError());
+            Net_Close(serverFd);
+            return 1;
+        }
+
+        if !Net_Listen(serverFd, config.backlog) {
+            PrintLine("FATAL: listen() failed");
+            Net_Close(serverFd);
+            return 1;
+        }
+
+        Print("Listening on http://");
+        Print(config.bindAddr);
+        Print(":");
+        PrintInt(config.port);
+        PrintLine("");
+        PrintInt(config.workerCount);
+        PrintLine(" worker threads  |  static: ./public/");
+        PrintLine("Endpoints:  /  /api/health  /api/info  /ws");
+        PrintLine("Press Ctrl+C to stop.");
+        PrintLine("");
+
+        let taskQueue: Channel<ConnectionTask> = Channel_New<ConnectionTask>(config.backlog as int64);
+        let workerCtx: WorkerCtx = WorkerCtx { taskQueue: &taskQueue, router: router };
+        let acceptorCtx: AcceptorCtx = AcceptorCtx { serverFd: serverFd, taskQueue: &taskQueue };
+
+        // Spawn workers (main thread will also become one)
+        var i: int = 0;
+        while i < config.workerCount - 1 {
+            spawn Worker(&workerCtx);
+            i = i + 1;
+        }
+
+        // Spawn acceptor
+        spawn Acceptor(&acceptorCtx);
+
+        // Main thread works too
+        Worker(&workerCtx);
+
+        return 0;
     }
 
-    // Spawn acceptor
-    spawn Acceptor(&acceptorCtx);
-
-    // Main thread works too
-    Worker(&workerCtx);
-
-    return 0;
-}
-
 }

apps/simpledb/src/Main.bux

@@ -1,339 +1,339 @@
 module Main {
 
-import Std::Io::{PrintLine, Print, PrintInt, ReadFile, WriteFile, FileExists};
-import Std::Os::{Os_ArgsCount, Os_Args};
-import Std::String::{String_Len, String_Eq, String_StartsWith, String_Find, String_Slice, String_Offset};
+    import Std::Io::{PrintLine, Print, PrintInt, ReadFile, WriteFile, FileExists};
+    import Std::Os::{Os_ArgsCount, Os_Args};
+    import Std::String::{String_Len, String_Eq, String_StartsWith, String_Find, String_Slice, String_Offset};
 
-extern func bux_strlen(s: String) -> uint;
-extern func bux_strstr(haystack: String, needle: String) -> String;
-extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
-extern func bux_str_split_count(s: String, delim: String) -> uint;
-extern func bux_str_split_part(s: String, delim: String, index: uint) -> String;
-extern func bux_sb_new(initial_cap: uint) -> *void;
-extern func bux_sb_append(sb: *void, s: String);
-extern func bux_sb_append_char(sb: *void, c: char8);
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_strstr(haystack: String, needle: String) -> String;
+    extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
+    extern func bux_str_split_count(s: String, delim: String) -> uint;
+    extern func bux_str_split_part(s: String, delim: String, index: uint) -> String;
+    extern func bux_sb_new(initial_cap: uint) -> *void;
+    extern func bux_sb_append(sb: *void, s: String);
+    extern func bux_sb_append_char(sb: *void, c: char8);
 
-func SB_AppendChar(sb: *void, c: int) {
-    bux_sb_append_char(sb, c as char8);
-}
-extern func bux_sb_build(sb: *void) -> String;
-extern func bux_sb_free(sb: *void);
-extern func bux_alloc(size: uint) -> *void;
-extern func bux_free(ptr: *void);
+    func SB_AppendChar(sb: *void, c: int) {
+        bux_sb_append_char(sb, c as char8);
+    }
+    extern func bux_sb_build(sb: *void) -> String;
+    extern func bux_sb_free(sb: *void);
+    extern func bux_alloc(size: uint) -> *void;
+    extern func bux_free(ptr: *void);
 
-struct Database {
-    path: String,
-    sb: *void,
-    loaded: bool,
-    count: uint,
-}
+    struct Database {
+        path: String,
+        sb: *void,
+        loaded: bool,
+        count: uint,
+    }
 
-func DB_New(filePath: String) -> Database {
-    var db: Database;
-    db.path = filePath;
-    db.sb = bux_sb_new(4096);
-    db.loaded = false;
-    db.count = 0;
-    return db;
-}
+    func DB_New(filePath: String) -> Database {
+        var db: Database;
+        db.path = filePath;
+        db.sb = bux_sb_new(4096);
+        db.loaded = false;
+        db.count = 0;
+        return db;
+    }
 
-func DB_Load(self: *Database) -> bool {
-    if self.loaded { return true; }
+    func DB_Load(self: *Database) -> bool {
+        if self.loaded { return true; }
 
-    if !FileExists(self.path) {
+        if !FileExists(self.path) {
+            self.loaded = true;
+            return true;
+        }
+
+        let raw: String = ReadFile(self.path);
+        if String_Len(raw) == 0 || bux_strlen(raw) == 0 {
+            self.loaded = true;
+            return true;
+        }
+
+        bux_sb_append(self.sb, raw);
+
+        let lineCount: uint = bux_str_split_count(raw, "\n");
+        var i: uint = 0;
+        var n: uint = 0;
+        while i < lineCount {
+            let line: String = bux_str_split_part(raw, "\n", i);
+            if bux_strlen(line) > 0 {
+                n = n + 1;
+            }
+            i = i + 1;
+        }
+        self.count = n;
         self.loaded = true;
         return true;
     }
 
-    let raw: String = ReadFile(self.path);
-    if String_Len(raw) == 0 || bux_strlen(raw) == 0 {
-        self.loaded = true;
-        return true;
-    }
-
-    bux_sb_append(self.sb, raw);
-
-    let lineCount: uint = bux_str_split_count(raw, "\n");
-    var i: uint = 0;
-    var n: uint = 0;
-    while i < lineCount {
-        let line: String = bux_str_split_part(raw, "\n", i);
-        if bux_strlen(line) > 0 {
-            n = n + 1;
-        }
-        i = i + 1;
-    }
-    self.count = n;
-    self.loaded = true;
-    return true;
-}
-
-func DB_Get(self: *Database, key: String) -> String {
-    let raw: String = bux_sb_build(self.sb);
-    let lineCount: uint = bux_str_split_count(raw, "\n");
-    var i: uint = 0;
-    while i < lineCount {
-        let line: String = bux_str_split_part(raw, "\n", i);
-        if String_StartsWith(line, key) {
-            let eqPos: String = String_Find(line, "=");
-            if String_Len(eqPos) > 0 {
-                let keyLen: uint = bux_strlen(key);
-                let valStart: uint = keyLen + 1;
-                let lineLen: uint = bux_strlen(line);
-                if valStart < lineLen {
-                    return bux_str_slice(line, valStart, lineLen - valStart);
-                }
-            }
-        }
-        i = i + 1;
-    }
-    return "";
-}
-
-func DB_Set(self: *Database, key: String, value: String) {
-    let raw: String = bux_sb_build(self.sb);
-    let lineCount: uint = bux_str_split_count(raw, "\n");
-
-    var newSb: *void = bux_sb_new(4096);
-    var found: bool = false;
-    var i: uint = 0;
-    while i < lineCount {
-        let line: String = bux_str_split_part(raw, "\n", i);
-        if bux_strlen(line) > 0 {
+    func DB_Get(self: *Database, key: String) -> String {
+        let raw: String = bux_sb_build(self.sb);
+        let lineCount: uint = bux_str_split_count(raw, "\n");
+        var i: uint = 0;
+        while i < lineCount {
+            let line: String = bux_str_split_part(raw, "\n", i);
             if String_StartsWith(line, key) {
                 let eqPos: String = String_Find(line, "=");
                 if String_Len(eqPos) > 0 {
-                    bux_sb_append(newSb, key);
-                    SB_AppendChar(newSb, 61);
-                    bux_sb_append(newSb, value);
-                    SB_AppendChar(newSb, 10);
-                    found = true;
+                    let keyLen: uint = bux_strlen(key);
+                    let valStart: uint = keyLen + 1;
+                    let lineLen: uint = bux_strlen(line);
+                    if valStart < lineLen {
+                        return bux_str_slice(line, valStart, lineLen - valStart);
+                    }
+                }
+            }
+            i = i + 1;
+        }
+        return "";
+    }
+
+    func DB_Set(self: *Database, key: String, value: String) {
+        let raw: String = bux_sb_build(self.sb);
+        let lineCount: uint = bux_str_split_count(raw, "\n");
+
+        var newSb: *void = bux_sb_new(4096);
+        var found: bool = false;
+        var i: uint = 0;
+        while i < lineCount {
+            let line: String = bux_str_split_part(raw, "\n", i);
+            if bux_strlen(line) > 0 {
+                if String_StartsWith(line, key) {
+                    let eqPos: String = String_Find(line, "=");
+                    if String_Len(eqPos) > 0 {
+                        bux_sb_append(newSb, key);
+                        SB_AppendChar(newSb, 61);
+                        bux_sb_append(newSb, value);
+                        SB_AppendChar(newSb, 10);
+                        found = true;
+                    } else {
+                        bux_sb_append(newSb, line);
+                        SB_AppendChar(newSb, 10);
+                    }
                 } else {
                     bux_sb_append(newSb, line);
                     SB_AppendChar(newSb, 10);
                 }
-            } else {
-                bux_sb_append(newSb, line);
-                SB_AppendChar(newSb, 10);
             }
+            i = i + 1;
         }
-        i = i + 1;
+
+        if !found {
+            bux_sb_append(newSb, key);
+            SB_AppendChar(newSb, 61);
+            bux_sb_append(newSb, value);
+            SB_AppendChar(newSb, 10);
+            self.count = self.count + 1;
+        }
+
+        bux_sb_free(self.sb);
+        self.sb = newSb;
     }
 
-    if !found {
-        bux_sb_append(newSb, key);
-        SB_AppendChar(newSb, 61);
-        bux_sb_append(newSb, value);
-        SB_AppendChar(newSb, 10);
-        self.count = self.count + 1;
-    }
+    func DB_Del(self: *Database, key: String) {
+        let raw: String = bux_sb_build(self.sb);
+        let lineCount: uint = bux_str_split_count(raw, "\n");
 
-    bux_sb_free(self.sb);
-    self.sb = newSb;
-}
-
-func DB_Del(self: *Database, key: String) {
-    let raw: String = bux_sb_build(self.sb);
-    let lineCount: uint = bux_str_split_count(raw, "\n");
-
-    var newSb: *void = bux_sb_new(4096);
-    var i: uint = 0;
-    var delCount: uint = 0;
-    while i < lineCount {
-        let line: String = bux_str_split_part(raw, "\n", i);
-        if bux_strlen(line) > 0 {
-            if String_StartsWith(line, key) {
-                let eqPos: String = String_Find(line, "=");
-                if String_Len(eqPos) > 0 {
-                    delCount = delCount + 1;
+        var newSb: *void = bux_sb_new(4096);
+        var i: uint = 0;
+        var delCount: uint = 0;
+        while i < lineCount {
+            let line: String = bux_str_split_part(raw, "\n", i);
+            if bux_strlen(line) > 0 {
+                if String_StartsWith(line, key) {
+                    let eqPos: String = String_Find(line, "=");
+                    if String_Len(eqPos) > 0 {
+                        delCount = delCount + 1;
+                    } else {
+                        bux_sb_append(newSb, line);
+                        SB_AppendChar(newSb, 10);
+                    }
                 } else {
                     bux_sb_append(newSb, line);
                     SB_AppendChar(newSb, 10);
                 }
+            }
+            i = i + 1;
+        }
+
+        if delCount > 0 {
+            self.count = self.count - delCount;
+        }
+
+        bux_sb_free(self.sb);
+        self.sb = newSb;
+    }
+
+    func DB_Has(self: *Database, key: String) -> bool {
+        let val: String = DB_Get(self, key);
+        return bux_strlen(val) > 0;
+    }
+
+    func DB_Count(self: *Database) -> uint {
+        return self.count;
+    }
+
+    func DB_Keys(self: *Database) -> *String {
+        if self.count == 0 { return null as *String; }
+
+        let raw: String = bux_sb_build(self.sb);
+        let lineCount: uint = bux_str_split_count(raw, "\n");
+        let keys: *String = bux_alloc(self.count * sizeof(String)) as *String;
+
+        var found: uint = 0;
+        var i: uint = 0;
+        while i < lineCount && found < self.count {
+            let line: String = bux_str_split_part(raw, "\n", i);
+            if bux_strlen(line) > 0 {
+                let eqPos: String = String_Find(line, "=");
+                if String_Len(eqPos) > 0 {
+                    let keyLen: uint = String_Offset(eqPos, line);
+                    keys[found] = bux_str_slice(line, 0, keyLen);
+                    found = found + 1;
+                }
+            }
+            i = i + 1;
+        }
+
+        return keys;
+    }
+
+    func DB_Save(self: *Database) -> bool {
+        let content: String = bux_sb_build(self.sb);
+        let ok: bool = WriteFile(self.path, content);
+        return ok;
+    }
+
+    func PrintUsage() {
+        PrintLine("SimpleDB — file-backed key-value database");
+        PrintLine("Usage:");
+        PrintLine("  simpledb <dbfile> set <key> <value>");
+        PrintLine("  simpledb <dbfile> get <key>");
+        PrintLine("  simpledb <dbfile> del <key>");
+        PrintLine("  simpledb <dbfile> has <key>");
+        PrintLine("  simpledb <dbfile> keys");
+        PrintLine("  simpledb <dbfile> count");
+    }
+
+    func Main() -> int {
+        let argc: int = Os_ArgsCount();
+
+        if argc < 3 {
+            PrintUsage();
+            return 1;
+        }
+
+        let dbFile: String = Os_Args(1);
+        let cmd: String = Os_Args(2);
+
+        var db: Database = DB_New(dbFile);
+
+        if String_Eq(cmd, "get") {
+            DB_Load(&db);
+            if argc < 4 {
+                PrintLine("get: missing key");
+                return 1;
+            }
+            let key: String = Os_Args(3);
+            let val: String = DB_Get(&db, key);
+            if bux_strlen(val) > 0 {
+                PrintLine(val);
             } else {
-                bux_sb_append(newSb, line);
-                SB_AppendChar(newSb, 10);
+                Print("(not found) ");
+                PrintLine(key);
             }
-        }
-        i = i + 1;
-    }
-
-    if delCount > 0 {
-        self.count = self.count - delCount;
-    }
-
-    bux_sb_free(self.sb);
-    self.sb = newSb;
-}
-
-func DB_Has(self: *Database, key: String) -> bool {
-    let val: String = DB_Get(self, key);
-    return bux_strlen(val) > 0;
-}
-
-func DB_Count(self: *Database) -> uint {
-    return self.count;
-}
-
-func DB_Keys(self: *Database) -> *String {
-    if self.count == 0 { return null as *String; }
-
-    let raw: String = bux_sb_build(self.sb);
-    let lineCount: uint = bux_str_split_count(raw, "\n");
-    let keys: *String = bux_alloc(self.count * sizeof(String)) as *String;
-
-    var found: uint = 0;
-    var i: uint = 0;
-    while i < lineCount && found < self.count {
-        let line: String = bux_str_split_part(raw, "\n", i);
-        if bux_strlen(line) > 0 {
-            let eqPos: String = String_Find(line, "=");
-            if String_Len(eqPos) > 0 {
-                let keyLen: uint = String_Offset(eqPos, line);
-                keys[found] = bux_str_slice(line, 0, keyLen);
-                found = found + 1;
-            }
-        }
-        i = i + 1;
-    }
-
-    return keys;
-}
-
-func DB_Save(self: *Database) -> bool {
-    let content: String = bux_sb_build(self.sb);
-    let ok: bool = WriteFile(self.path, content);
-    return ok;
-}
-
-func PrintUsage() {
-    PrintLine("SimpleDB — file-backed key-value database");
-    PrintLine("Usage:");
-    PrintLine("  simpledb <dbfile> set <key> <value>");
-    PrintLine("  simpledb <dbfile> get <key>");
-    PrintLine("  simpledb <dbfile> del <key>");
-    PrintLine("  simpledb <dbfile> has <key>");
-    PrintLine("  simpledb <dbfile> keys");
-    PrintLine("  simpledb <dbfile> count");
-}
-
-func Main() -> int {
-    let argc: int = Os_ArgsCount();
-
-    if argc < 3 {
-        PrintUsage();
-        return 1;
-    }
-
-    let dbFile: String = Os_Args(1);
-    let cmd: String = Os_Args(2);
-
-    var db: Database = DB_New(dbFile);
-
-    if String_Eq(cmd, "get") {
-        DB_Load(&db);
-        if argc < 4 {
-            PrintLine("get: missing key");
-            return 1;
-        }
-        let key: String = Os_Args(3);
-        let val: String = DB_Get(&db, key);
-        if bux_strlen(val) > 0 {
-            PrintLine(val);
-        } else {
-            Print("(not found) ");
-            PrintLine(key);
-        }
-        return 0;
-    }
-
-    if String_Eq(cmd, "set") {
-        DB_Load(&db);
-        if argc < 5 {
-            PrintLine("set: missing key or value");
-            return 1;
-        }
-        let key: String = Os_Args(3);
-        let val: String = Os_Args(4);
-        DB_Set(&db, key, val);
-        let saved: bool = DB_Save(&db);
-        if saved {
-            Print("OK  ");
-            Print(key);
-            Print(" = ");
-            PrintLine(val);
-        } else {
-            PrintLine("set: save failed");
-        }
-        return 0;
-    }
-
-    if String_Eq(cmd, "del") {
-        DB_Load(&db);
-        if argc < 4 {
-            PrintLine("del: missing key");
-            return 1;
-        }
-        let key: String = Os_Args(3);
-        DB_Del(&db, key);
-        DB_Save(&db);
-        Print("DEL ");
-        PrintLine(key);
-        return 0;
-    }
-
-    if String_Eq(cmd, "has") {
-        DB_Load(&db);
-        if argc < 4 {
-            PrintLine("has: missing key");
-            return 1;
-        }
-        let key: String = Os_Args(3);
-        let found: bool = DB_Has(&db, key);
-        if found {
-            Print("true  ");
-            PrintLine(key);
-        } else {
-            Print("false  ");
-            PrintLine(key);
-        }
-        return 0;
-    }
-
-    if String_Eq(cmd, "keys") {
-        DB_Load(&db);
-        let n: uint = DB_Count(&db);
-        Print("keys: ");
-        PrintInt(n as int);
-        PrintLine("");
-
-        if n == 0 {
             return 0;
         }
 
-        let list: *String = DB_Keys(&db);
-        var i: uint = 0;
-        while i < n {
-            Print("  ");
-            PrintLine(list[i]);
-            i = i + 1;
+        if String_Eq(cmd, "set") {
+            DB_Load(&db);
+            if argc < 5 {
+                PrintLine("set: missing key or value");
+                return 1;
+            }
+            let key: String = Os_Args(3);
+            let val: String = Os_Args(4);
+            DB_Set(&db, key, val);
+            let saved: bool = DB_Save(&db);
+            if saved {
+                Print("OK  ");
+                Print(key);
+                Print(" = ");
+                PrintLine(val);
+            } else {
+                PrintLine("set: save failed");
+            }
+            return 0;
         }
-        bux_free(list as *void);
-        return 0;
+
+        if String_Eq(cmd, "del") {
+            DB_Load(&db);
+            if argc < 4 {
+                PrintLine("del: missing key");
+                return 1;
+            }
+            let key: String = Os_Args(3);
+            DB_Del(&db, key);
+            DB_Save(&db);
+            Print("DEL ");
+            PrintLine(key);
+            return 0;
+        }
+
+        if String_Eq(cmd, "has") {
+            DB_Load(&db);
+            if argc < 4 {
+                PrintLine("has: missing key");
+                return 1;
+            }
+            let key: String = Os_Args(3);
+            let found: bool = DB_Has(&db, key);
+            if found {
+                Print("true  ");
+                PrintLine(key);
+            } else {
+                Print("false  ");
+                PrintLine(key);
+            }
+            return 0;
+        }
+
+        if String_Eq(cmd, "keys") {
+            DB_Load(&db);
+            let n: uint = DB_Count(&db);
+            Print("keys: ");
+            PrintInt(n as int);
+            PrintLine("");
+
+            if n == 0 {
+                return 0;
+            }
+
+            let list: *String = DB_Keys(&db);
+            var i: uint = 0;
+            while i < n {
+                Print("  ");
+                PrintLine(list[i]);
+                i = i + 1;
+            }
+            bux_free(list as *void);
+            return 0;
+        }
+
+        if String_Eq(cmd, "count") {
+            DB_Load(&db);
+            let n: uint = DB_Count(&db);
+            Print("count: ");
+            PrintInt(n as int);
+            PrintLine("");
+            return 0;
+        }
+
+        Print("unknown command: ");
+        PrintLine(cmd);
+        return 1;
     }
 
-    if String_Eq(cmd, "count") {
-        DB_Load(&db);
-        let n: uint = DB_Count(&db);
-        Print("count: ");
-        PrintInt(n as int);
-        PrintLine("");
-        return 0;
-    }
-
-    Print("unknown command: ");
-    PrintLine(cmd);
-    return 1;
-}
-
 }

bootstrap/cli.nim

@@ -1,6 +1,9 @@
-import std/[os, strutils, terminal, strformat, osproc, sets]
+import std/[os, strutils, terminal, strformat, osproc, sets, algorithm, tables]
 import lexer, parser, ast, sema, manifest, hir_lower, lir_lower, lir_c_backend
 import source_location
+import fmt
+import docgen
+import registry
 
 type
   ColorMode* = enum
@@ -21,16 +24,25 @@ Usage: bux [options] <command> [command-options]
 Commands:
   new <name>          Create a new Bux package
   init                Initialize a Bux package in the current directory
-  add <name> [ver]    Add a dependency (--path, --git)
+  add <name> [ver]    Add a dependency (--path, --git, or registry)
   install             Resolve and install dependencies
+  search [query]      Search the package registry
   build               Build the current package
   run                 Build and run the current package
   test                Run tests in tests/ directory
   check               Type-check the current package
+  fmt [path]          Format .bux sources (default: .)
+  doc [path]          Generate Markdown API docs from /// comments
   clean               Remove build artifacts
   help                Show this help message
   version             Show version
 
+Command options:
+  test --filter <s>   Only run tests whose name contains <s>
+  fmt  --check        Exit 1 if any file would be reformatted (CI)
+  doc  --out <file>   Write docs to file (default: stdout)
+  add  --path / --git Explicit source; else resolve via registry
+
 Global options:
   --color <auto|on|off>   Control colored output (default: auto)
   -q, --quiet             Suppress non-error output
@@ -192,6 +204,14 @@ proc hintForMessage(msg: string): string =
     return "provide the missing argument (positional or named)"
   if "use of moved value" in m:
     return "the value was moved; clone it or restructure ownership"
+  if "cannot return reference to local" in m:
+    return "return a value, or return a reference borrowed from a function parameter"
+  if "lifetime elision failed" in m:
+    return "add an explicit lifetime, e.g. func F<'a>(x: &'a T, y: &'a U) -> &'a T"
+  if "lifetime mismatch" in m:
+    return "returned reference must share a lifetime with the return type (annotate with 'a)"
+  if "no input reference to borrow from" in m:
+    return "add a '&T' parameter to borrow from, or return an owned value"
   if "shared reference" in m or "checked function" in m:
     return "use '&mut T' for mutation, or drop @[Checked] for unchecked code"
   if "double mutable borrow" in m or "already mutably borrowed" in m:
@@ -378,7 +398,11 @@ proc cmdAdd*(args: seq[string], opts: GlobalOptions): int =
         printError("--git requires a value", useColor)
         return 1
     else:
-      version = args[i]
+      if not args[i].startsWith("-"):
+        version = args[i]
+      else:
+        printError(&"unknown add option '{args[i]}'", useColor)
+        return 1
     inc i
   # Append to bux.toml
   var depLine = ""
@@ -387,7 +411,19 @@ proc cmdAdd*(args: seq[string], opts: GlobalOptions): int =
   elif gitUrl.len > 0:
     depLine = &"{depName} = {{ Version = \"{version}\", Source = \"{gitUrl}\" }}"
   else:
-    depLine = &"{depName} = \"{version}\""
+    # Registry resolve (E.1)
+    let reg = loadRegistry()
+    if reg.path.len == 0:
+      printError("no package registry found (set BUX_REGISTRY or install config/registry.toml)", useColor)
+      return 1
+    let pkg = registryLookup(reg, depName, version)
+    if pkg.name.len == 0:
+      printError(&"package '{depName}' not found in registry ({reg.path})", useColor)
+      printError("hint: bux search  |  bux add name --git <url>  |  bux add name --path <dir>", useColor)
+      return 1
+    depLine = formatRegistryDepLine(depName, pkg)
+    if not opts.quiet:
+      printInfo(&"Resolved '{depName}' {pkg.version} from registry {reg.path}", useColor)
   var content = readFile(manifestPath)
   # Ensure [Dependencies] section exists
   if content.find("[Dependencies]") < 0:
@@ -399,6 +435,34 @@ proc cmdAdd*(args: seq[string], opts: GlobalOptions): int =
     printInfo(&"Added dependency '{depName}' to bux.toml", useColor)
   return 0
 
+proc cmdSearch*(args: seq[string], opts: GlobalOptions): int =
+  let useColor = shouldUseColor(opts)
+  let query = if args.len > 0: args[0] else: ""
+  let reg = loadRegistry()
+  if reg.path.len == 0:
+    printError("no package registry found (set BUX_REGISTRY)", useColor)
+    return 1
+  if not opts.quiet:
+    echo &"Registry: {reg.path}"
+  let hits = registrySearch(reg, query)
+  if hits.len == 0:
+    if not opts.quiet:
+      echo "No packages matched."
+    return 1
+  # Dedupe by name showing latest version
+  var seen = initTable[string, RegistryPackage]()
+  for p in hits:
+    seen[p.name.toLowerAscii()] = p
+  var names: seq[string] = @[]
+  for k in seen.keys:
+    names.add(k)
+  names.sort(system.cmp)
+  for k in names:
+    let p = seen[k]
+    let desc = if p.description.len > 0: p.description else: p.source
+    echo &"  {p.name}  {p.version}  — {desc}"
+  return 0
+
 proc cmdInstall*(args: seq[string], opts: GlobalOptions): int =
   let useColor = shouldUseColor(opts)
   let root = getCurrentDir()
@@ -411,6 +475,7 @@ proc cmdInstall*(args: seq[string], opts: GlobalOptions): int =
   let cacheDir = getHomeDir() / ".bux" / "packages"
   if not dirExists(cacheDir):
     createDir(cacheDir)
+  let reg = loadRegistry()
   # Resolve each dependency
   for dep in man.dependencies:
     case dep.kind
@@ -433,20 +498,43 @@ proc cmdInstall*(args: seq[string], opts: GlobalOptions): int =
       if not dirExists(depDir):
         if not opts.quiet:
           printInfo(&"Cloning '{dep.name}' from {dep.gitUrl}...", useColor)
-        let (outp, code) = execCmdEx(&"git clone {dep.gitUrl} {depDir} 2>&1")
+        let (outp, code) = execCmdEx(&"git clone --quiet {quoteShell(dep.gitUrl)} {quoteShell(depDir)} 2>&1")
         if code != 0:
           printError(&"failed to clone {dep.gitUrl}: {outp}", useColor)
           return 1
       else:
         if not opts.quiet:
           printInfo(&"Using cached '{dep.name}' from {depDir}", useColor)
+      # Lock stores git URL; build loads from cache by name
       lock.entries.add(LockEntry(name: dep.name, version: dep.gitVersion, source: dep.gitUrl))
     of dkVersion:
-      # For version-based deps without a registry, we just record them
-      # TODO: lookup in registry
-      lock.entries.add(LockEntry(name: dep.name, version: dep.versionReq, source: "registry"))
-      if not opts.quiet:
-        printInfo(&"Recorded dependency '{dep.name}' = {dep.versionReq}", useColor)
+      # Registry lookup (E.1)
+      if reg.path.len == 0:
+        printError(&"cannot resolve '{dep.name}': no package registry (set BUX_REGISTRY)", useColor)
+        return 1
+      let pkg = registryLookup(reg, dep.name, dep.versionReq)
+      if pkg.name.len == 0:
+        printError(&"package '{dep.name}' not found in registry", useColor)
+        return 1
+      if pkg.resolvedPath.len > 0 and dirExists(pkg.resolvedPath):
+        lock.entries.add(LockEntry(name: dep.name, version: pkg.version, source: pkg.resolvedPath))
+        if not opts.quiet:
+          printInfo(&"Resolved '{dep.name}' {pkg.version} → {pkg.resolvedPath}", useColor)
+      elif isGitSource(pkg.source):
+        let depDir = cacheDir / dep.name
+        if not dirExists(depDir):
+          if not opts.quiet:
+            printInfo(&"Cloning '{dep.name}' from {pkg.source}...", useColor)
+          let (outp, code) = execCmdEx(&"git clone --quiet {quoteShell(pkg.source)} {quoteShell(depDir)} 2>&1")
+          if code != 0:
+            printError(&"failed to clone {pkg.source}: {outp}", useColor)
+            return 1
+        lock.entries.add(LockEntry(name: dep.name, version: pkg.version, source: pkg.source))
+        if not opts.quiet:
+          printInfo(&"Resolved '{dep.name}' {pkg.version} → git {pkg.source}", useColor)
+      else:
+        printError(&"registry entry '{dep.name}' has unusable source '{pkg.source}'", useColor)
+        return 1
   # Save lockfile
   let lockPath = root / "bux.lock"
   saveLockfile(lockPath, lock)
@@ -722,18 +810,93 @@ proc cmdClean*(args: seq[string], opts: GlobalOptions): int =
     printInfo("clean: build directory removed", useColor)
   return 0
 
+proc parseTestArgs(args: seq[string]): tuple[filter: string, paths: seq[string], ok: bool] =
+  ## Parse `test` args: optional `--filter <s>` / `--filter=<s>`, rest are ignored paths.
+  result.filter = ""
+  result.paths = @[]
+  result.ok = true
+  var i = 0
+  while i < args.len:
+    let a = args[i]
+    if a == "--filter":
+      if i + 1 >= args.len:
+        stderr.writeLine("error: --filter requires an argument")
+        result.ok = false
+        return
+      inc i
+      result.filter = args[i]
+    elif a.startsWith("--filter="):
+      result.filter = a["--filter=".len .. ^1]
+    elif a == "--help" or a == "-h":
+      echo "Usage: bux test [--filter <name>] [project-dir]"
+      echo "  --filter <name>   Only run tests whose filename contains <name>"
+      result.ok = false  # treat as early exit without error in caller? use special
+      # Signal help via empty filter and a sentinel path
+      result.paths = @["__help__"]
+      return
+    elif a.startsWith("-"):
+      stderr.writeLine(&"error: unknown test option '{a}'")
+      result.ok = false
+      return
+    else:
+      result.paths.add(a)
+    inc i
+
+proc parseFmtArgs(args: seq[string]): tuple[checkOnly: bool, paths: seq[string], ok: bool, help: bool] =
+  result.checkOnly = false
+  result.paths = @[]
+  result.ok = true
+  result.help = false
+  var i = 0
+  while i < args.len:
+    let a = args[i]
+    if a == "--check":
+      result.checkOnly = true
+    elif a == "--help" or a == "-h":
+      result.help = true
+      return
+    elif a.startsWith("-"):
+      stderr.writeLine(&"error: unknown fmt option '{a}'")
+      result.ok = false
+      return
+    else:
+      result.paths.add(a)
+    inc i
+
 proc cmdTest*(args: seq[string], opts: GlobalOptions): int =
   let useColor = shouldUseColor(opts)
-  let root = getCurrentDir()
+  let (filter, paths, ok) = parseTestArgs(args)
+  if not ok:
+    if paths.len == 1 and paths[0] == "__help__":
+      return 0
+    return 1
+  let root = if paths.len > 0: absolutePath(paths[0]) else: getCurrentDir()
   let testsDir = root / "tests"
   var testFiles: seq[string] = @[]
   if dirExists(testsDir):
     for kind, path in walkDir(testsDir):
       if kind == pcFile and path.endsWith(".bux"):
+        let testName = splitFile(path).name
+        if filter.len > 0 and filter notin testName:
+          continue
         testFiles.add(path)
+  testFiles.sort(system.cmp)
   if testFiles.len == 0:
-    printError("no tests found in tests/ directory", useColor)
+    if filter.len > 0:
+      printError(&"no tests matching filter '{filter}' in tests/", useColor)
+    else:
+      printError("no tests found in tests/ directory", useColor)
     return 1
+
+  if not opts.quiet:
+    if filter.len > 0:
+      echo &"Running tests (filter: {filter}) in {testsDir}"
+    else:
+      echo &"Running tests in {testsDir}"
+    echo "┌──────────────────────────────┬────────┐"
+    echo "│ Test                         │ Status │"
+    echo "├──────────────────────────────┼────────┤"
+
   var passed = 0
   var failed = 0
   for testFile in testFiles:
@@ -742,25 +905,167 @@ proc cmdTest*(args: seq[string], opts: GlobalOptions): int =
     removeDir(tmpDir)
     createDir(tmpDir / "src")
     copyFile(testFile, tmpDir / "src" / "Main.bux")
-    writeFile(tmpDir / "bux.toml", "[package]\nname = \"" & testName & "\"\nversion = \"0.1.0\"\n")
+    writeFile(tmpDir / "bux.toml",
+      "[Package]\nName    = \"" & testName & "\"\nVersion = \"0.1.0\"\nType    = \"bin\"\n\n[Build]\nOutput = \"Bin\"\n")
     let buildRes = cmdBuild(@[tmpDir], opts)
+    var status: string
+    var statusOk = false
     if buildRes != 0:
-      printError(&"  FAIL {testName} (build)", useColor)
+      status = "FAIL"
+      failed += 1
+    else:
+      var execFile = tmpDir / "build" / testName
+      if not fileExists(execFile):
+        execFile = tmpDir / "build" / "bux_out"
+      let exitCode = execCmd(execFile)
+      if exitCode == 0:
+        status = "PASS"
+        statusOk = true
+        passed += 1
+      else:
+        status = &"FAIL:{exitCode}"
+        failed += 1
+    removeDir(tmpDir)
+
+    if not opts.quiet:
+      # Pad name to 28 chars for the table column
+      var nameCol = testName
+      if nameCol.len > 28:
+        nameCol = nameCol[0 .. 24] & "..."
+      else:
+        nameCol = nameCol & repeat(' ', 28 - nameCol.len)
+      var stCol = status
+      if stCol.len < 6:
+        stCol = stCol & repeat(' ', 6 - stCol.len)
+      if useColor:
+        if statusOk:
+          stdout.setForegroundColor(fgGreen)
+        else:
+          stdout.setForegroundColor(fgRed)
+        stdout.writeLine(&"│ {nameCol} │ {stCol} │")
+        stdout.resetAttributes()
+      else:
+        echo &"│ {nameCol} │ {stCol} │"
+
+  if not opts.quiet:
+    echo "└──────────────────────────────┴────────┘"
+    echo &"\nResults: {passed} passed, {failed} failed, {testFiles.len} total"
+  # CI-friendly exit codes: 0 = all pass, 1 = some failed
+  return if failed > 0: 1 else: 0
+
+proc cmdFmt*(args: seq[string], opts: GlobalOptions): int =
+  let useColor = shouldUseColor(opts)
+  let (checkOnly, paths, ok, help) = parseFmtArgs(args)
+  if not ok:
+    return 1
+  if help:
+    echo "Usage: bux fmt [--check] [path...]"
+    echo "  --check   Do not write; exit 1 if any file would be reformatted"
+    echo "  path      File or directory (default: .)"
+    return 0
+
+  let targets = if paths.len > 0: paths else: @["."]
+  var files: seq[string] = @[]
+  for t in targets:
+    let collected = collectBuxFiles(t)
+    for f in collected:
+      if f notin files:
+        files.add(f)
+  files.sort(system.cmp)
+
+  if files.len == 0:
+    printError("no .bux files found", useColor)
+    return 1
+
+  var changed = 0
+  var failed = 0
+  var unchanged = 0
+  for path in files:
+    let (okf, didChange, msg) = formatFile(path, checkOnly)
+    if not okf:
+      printError(&"{path}: {msg}", useColor)
       failed += 1
       continue
-    var execFile = tmpDir / "build" / testName
-    if not fileExists(execFile):
-      execFile = tmpDir / "build" / "bux_out"
-    let exitCode = execCmd(execFile)
-    if exitCode == 0:
-      printInfo(&"  PASS {testName}", useColor)
-      passed += 1
+    if didChange:
+      changed += 1
+      if not opts.quiet:
+        if checkOnly:
+          printError(&"  would reformat {path}", useColor)
+        else:
+          printInfo(&"  formatted {path}", useColor)
     else:
-      printError(&"  FAIL {testName} (exit {exitCode})", useColor)
-      failed += 1
-    removeDir(tmpDir)
-  echo &"\nResults: {passed} passed, {failed} failed"
-  return if failed > 0: 1 else: 0
+      unchanged += 1
+      if opts.verbose and not opts.quiet:
+        echo &"  ok {path}"
+
+  if not opts.quiet:
+    if checkOnly:
+      echo &"\nfmt --check: {changed} would reformat, {unchanged} ok, {failed} errors"
+    else:
+      echo &"\nFormatted {changed}/{files.len} files ({unchanged} already clean)"
+
+  if failed > 0:
+    return 1
+  if checkOnly and changed > 0:
+    return 1
+  return 0
+
+proc cmdDoc*(args: seq[string], opts: GlobalOptions): int =
+  ## Generate Markdown docs from `///` / adjacent `/* */` comments.
+  var outPath = ""
+  var paths: seq[string] = @[]
+  var i = 0
+  while i < args.len:
+    let a = args[i]
+    if a == "--out" or a == "-o":
+      if i + 1 >= args.len:
+        stderr.writeLine("error: --out requires a path")
+        return 1
+      inc i
+      outPath = args[i]
+    elif a.startsWith("--out="):
+      outPath = a["--out=".len .. ^1]
+    elif a == "--help" or a == "-h":
+      echo "Usage: bux doc [--out file.md] [path...]"
+      echo "  Scans .bux files for /// and /* */ docs preceding declarations."
+      echo "  Default path: lib/ (stdlib) when omitted."
+      return 0
+    elif a.startsWith("-"):
+      stderr.writeLine(&"error: unknown doc option '{a}'")
+      return 1
+    else:
+      paths.add(a)
+    inc i
+
+  if paths.len == 0:
+    # Prefer stdlib if present
+    if dirExists("lib"):
+      paths = @["lib"]
+    else:
+      paths = @["."]
+
+  let items = generateDocs(paths)
+  let title =
+    if paths.len == 1 and paths[0] == "lib": "Bux Standard Library"
+    else: "API Reference"
+  let md = renderMarkdown(items, title)
+
+  if outPath.len > 0:
+    try:
+      let parent = parentDir(outPath)
+      if parent.len > 0 and not dirExists(parent):
+        createDir(parent)
+      writeFile(outPath, md)
+      if not opts.quiet:
+        echo &"Wrote {items.len} documented items → {outPath}"
+    except CatchableError as e:
+      stderr.writeLine("error: " & e.msg)
+      return 1
+  else:
+    stdout.write(md)
+  if items.len == 0 and not opts.quiet:
+    stderr.writeLine("warning: no /// or /* */ documented declarations found")
+  return 0
 
 proc cmdVersion*(args: seq[string], opts: GlobalOptions): int =
   echo "bux 0.1.0 (bootstrap)"
@@ -782,10 +1087,13 @@ proc runCli*(args: seq[string]): int =
   of "init": return cmdInit(cmdArgs, opts)
   of "add": return cmdAdd(cmdArgs, opts)
   of "install": return cmdInstall(cmdArgs, opts)
+  of "search": return cmdSearch(cmdArgs, opts)
   of "build": return cmdBuild(cmdArgs, opts)
   of "run": return cmdRun(cmdArgs, opts)
   of "check": return cmdCheck(cmdArgs, opts)
   of "test": return cmdTest(cmdArgs, opts)
+  of "fmt": return cmdFmt(cmdArgs, opts)
+  of "doc": return cmdDoc(cmdArgs, opts)
   of "clean": return cmdClean(cmdArgs, opts)
   of "version", "--version", "-v": return cmdVersion(cmdArgs, opts)
   of "help", "--help", "-h":

bootstrap/docgen.nim

@@ -0,0 +1,202 @@
+## docgen.nim — Extract `///` (and adjacent `/* */`) docs into Markdown.
+## Used by `bux doc [path...]`.
+
+import std/[os, strutils, strformat, algorithm]
+
+type
+  DocItem* = object
+    kind*: string       ## module | func | struct | enum | interface | extern
+    name*: string
+    signature*: string  ## first declaration line (trimmed)
+    docs*: string
+    file*: string
+    line*: int
+
+proc isDeclStart(line: string): bool =
+  let s = line.strip()
+  if s.len == 0: return false
+  # Leading attributes @[Checked] etc. — not a decl by themselves
+  if s.startsWith("@["): return false
+  if s.startsWith("func ") or s.startsWith("pub func ") or
+     s.startsWith("extern func ") or s.startsWith("const func ") or
+     s.startsWith("async func "):
+    return true
+  if s.startsWith("struct ") or s.startsWith("pub struct ") or
+     s.startsWith("enum ") or s.startsWith("pub enum ") or
+     s.startsWith("union ") or s.startsWith("interface ") or
+     s.startsWith("module ") or s.startsWith("type "):
+    return true
+  return false
+
+proc declKindAndName(line: string): tuple[kind, name: string] =
+  var s = line.strip()
+  # Strip leading pub/extern/const/async
+  for prefix in ["pub ", "extern ", "const ", "async "]:
+    if s.startsWith(prefix):
+      s = s[prefix.len .. ^1].strip()
+  var kind = "item"
+  if s.startsWith("func "):
+    kind = "func"
+    s = s["func ".len .. ^1]
+  elif s.startsWith("struct "):
+    kind = "struct"
+    s = s["struct ".len .. ^1]
+  elif s.startsWith("enum "):
+    kind = "enum"
+    s = s["enum ".len .. ^1]
+  elif s.startsWith("union "):
+    kind = "union"
+    s = s["union ".len .. ^1]
+  elif s.startsWith("interface "):
+    kind = "interface"
+    s = s["interface ".len .. ^1]
+  elif s.startsWith("module "):
+    kind = "module"
+    s = s["module ".len .. ^1]
+  elif s.startsWith("type "):
+    kind = "type"
+    s = s["type ".len .. ^1]
+  # Name: until `<` `(` `{` `:` space
+  var name = ""
+  for ch in s:
+    if ch in {' ', '<', '(', '{', ':', ';'}:
+      break
+    name.add(ch)
+  if name.len == 0:
+    name = s
+  # extern funcs already stripped "extern "
+  if kind == "func" and line.strip().startsWith("extern"):
+    kind = "extern"
+  return (kind, name)
+
+proc extractDocsFromSource*(source, path: string): seq[DocItem] =
+  result = @[]
+  var pending: seq[string] = @[]
+  var inBlockComment = false
+  var blockDoc: seq[string] = @[]
+  var lineNo = 0
+  for rawLine in source.splitLines():
+    inc lineNo
+    var line = rawLine
+    let stripped = line.strip()
+
+    # Block comment handling (/* ... */ used in stdlib today)
+    if inBlockComment:
+      let endIdx = stripped.find("*/")
+      if endIdx >= 0:
+        let before = stripped[0 ..< endIdx].strip()
+        if before.len > 0:
+          blockDoc.add(before)
+        inBlockComment = false
+        # Treat completed block as pending doc if non-empty
+        if blockDoc.len > 0:
+          pending = blockDoc
+          blockDoc = @[]
+        continue
+      else:
+        blockDoc.add(stripped)
+        continue
+    if stripped.startsWith("/*") and not stripped.startsWith("/***"):
+      let rest = stripped["/*".len .. ^1]
+      let endIdx = rest.find("*/")
+      if endIdx >= 0:
+        let body = rest[0 ..< endIdx].strip()
+        if body.len > 0:
+          pending = @[body]
+      else:
+        inBlockComment = true
+        blockDoc = @[]
+        let body = rest.strip()
+        if body.len > 0:
+          blockDoc.add(body)
+      continue
+
+    # Triple-slash doc comments
+    if stripped.startsWith("///"):
+      var body = stripped["///".len .. ^1]
+      if body.startsWith(" "):
+        body = body[1 .. ^1]
+      pending.add(body)
+      continue
+
+    # Empty line: keep pending docs (allow blank lines inside doc blocks)
+    if stripped.len == 0:
+      continue
+
+    # Attributes immediately before decl: keep pending
+    if stripped.startsWith("@["):
+      continue
+
+    if isDeclStart(line):
+      if pending.len > 0:
+        let (kind, name) = declKindAndName(line)
+        result.add(DocItem(
+          kind: kind,
+          name: name,
+          signature: stripped,
+          docs: pending.join("\n"),
+          file: path,
+          line: lineNo
+        ))
+      pending = @[]
+      continue
+
+    # Other code clears pending (except plain // comments)
+    if stripped.startsWith("//"):
+      continue
+    pending = @[]
+
+proc collectBuxFilesForDoc*(root: string): seq[string] =
+  result = @[]
+  if fileExists(root) and root.endsWith(".bux"):
+    result.add(root)
+    return
+  if not dirExists(root):
+    return
+  for path in walkDirRec(root):
+    if path.endsWith(".bux"):
+      result.add(path)
+  result.sort(system.cmp)
+
+proc renderMarkdown*(items: seq[DocItem], title: string = "API Reference"): string =
+  var sb: string
+  sb.add(&"# {title}\n\n")
+  sb.add("Generated by `bux doc` from `///` and `/* */` documentation comments.\n\n")
+  if items.len == 0:
+    sb.add("_No documented items found._\n")
+    return sb
+
+  # Group by file
+  var byFile: seq[string] = @[]
+  for it in items:
+    if it.file notin byFile:
+      byFile.add(it.file)
+  byFile.sort(system.cmp)
+
+  for f in byFile:
+    let base = splitFile(f).name
+    sb.add(&"## `{base}`\n\n")
+    sb.add(&"_Source: `{f}`_\n\n")
+    for it in items:
+      if it.file != f:
+        continue
+      sb.add(&"### `{it.name}` _{it.kind}_\n\n")
+      sb.add("```bux\n")
+      sb.add(it.signature)
+      sb.add("\n```\n\n")
+      if it.docs.len > 0:
+        sb.add(it.docs)
+        sb.add("\n\n")
+  return sb
+
+proc generateDocs*(paths: seq[string]): seq[DocItem] =
+  result = @[]
+  var files: seq[string] = @[]
+  for p in paths:
+    for f in collectBuxFilesForDoc(p):
+      if f notin files:
+        files.add(f)
+  files.sort(system.cmp)
+  for f in files:
+    let src = readFile(f)
+    result.add(extractDocsFromSource(src, f))

bootstrap/fmt.nim

@@ -0,0 +1,106 @@
+## fmt.nim — Indentation-based Bux source formatter (bootstrap).
+## Mirrors selfhost `src/fmt.bux`: re-indent by brace depth, preserve content.
+
+import std/[strutils, os, algorithm]
+
+proc isInStringOrComment(line: string, pos: int): bool =
+  ## Simplified: track `//`, `"..."`, and `'...'` up to `pos`.
+  var inString = false
+  var inChar = false
+  var inComment = false
+  var i = 0
+  while i < pos and i < line.len:
+    let c = line[i]
+    let n = if i + 1 < line.len: line[i + 1] else: '\0'
+    if inComment:
+      inc i
+      continue
+    if c == '/' and n == '/':
+      inComment = true
+      inc i
+      continue
+    if c == '"' and not inChar:
+      inString = not inString
+    if c == '\'' and not inString:
+      inChar = not inChar
+    inc i
+  return inString or inChar or inComment
+
+proc countBraceDelta(line: string): int =
+  var delta = 0
+  for i in 0 ..< line.len:
+    if isInStringOrComment(line, i):
+      continue
+    let c = line[i]
+    if c == '{':
+      inc delta
+    elif c == '}':
+      dec delta
+  return delta
+
+proc formatSource*(source: string): string =
+  ## Re-indent each non-empty line to 4 spaces × brace depth.
+  ## Idempotent: formatting a clean file is a no-op.
+  var sb: string
+  var indent = 0
+  # Nim's splitLines leaves a trailing "" when the source ends with '\n'.
+  # Drop that artifact so we don't accumulate blank lines on re-format.
+  var lines = source.splitLines(keepEol = false)
+  if source.len > 0 and source.endsWith('\n') and lines.len > 0 and lines[^1].len == 0:
+    lines.setLen(lines.len - 1)
+  for line in lines:
+    let trimmed = line.strip(leading = true, trailing = false)
+    if trimmed.len == 0:
+      sb.add('\n')
+      continue
+
+    let delta = countBraceDelta(trimmed)
+    let firstChar = trimmed[0]
+    if firstChar == '}':
+      dec indent
+      if indent < 0:
+        indent = 0
+
+    for _ in 0 ..< indent:
+      sb.add("    ")
+    sb.add(trimmed)
+    sb.add('\n')
+
+    if firstChar != '}':
+      indent = indent + delta
+    else:
+      # Net delta after the initial decrease for a leading `}`
+      indent = indent + delta + 1
+      if indent < 0:
+        indent = 0
+
+  return sb
+
+proc formatFile*(path: string, checkOnly: bool): tuple[ok: bool, changed: bool, msg: string] =
+  ## Format `path` in place, or only check if reformatting would change it.
+  if not fileExists(path):
+    return (false, false, "file not found: " & path)
+  let source = readFile(path)
+  let formatted = formatSource(source)
+  if formatted == source:
+    return (true, false, "")
+  if checkOnly:
+    return (true, true, "would reformat")
+  try:
+    writeFile(path, formatted)
+    return (true, true, "formatted")
+  except CatchableError as e:
+    return (false, false, e.msg)
+
+proc collectBuxFiles*(root: string): seq[string] =
+  ## Collect `.bux` files: single file, or recursive directory walk.
+  result = @[]
+  if fileExists(root) and root.endsWith(".bux"):
+    result.add(root)
+    return
+  if not dirExists(root):
+    return
+  for path in walkDirRec(root):
+    if path.endsWith(".bux"):
+      result.add(path)
+  result.sort(system.cmp)

bootstrap/registry.nim

@@ -0,0 +1,167 @@
+## registry.nim — Bux package registry index (E.1)
+##
+## Index format (TOML-ish, one package per [[package]] table):
+##
+##   [[package]]
+##   name = "greet"
+##   version = "0.1.0"
+##   source = "file:packages/greet"   # relative to the registry file
+##   description = "Hello helpers"
+##
+##   [[package]]
+##   name = "net"
+##   version = "1.2.0"
+##   source = "https://github.com/bux-lang/net.git"
+##
+## Lookup order for the index file:
+##   1. $BUX_REGISTRY (file path)
+##   2. ~/.bux/registry.toml
+##   3. <repo>/config/registry.toml next to the compiler / cwd
+
+import std/[os, strutils, strformat, algorithm]
+
+type
+  RegistryPackage* = object
+    name*: string
+    version*: string
+    source*: string        ## raw source as written in the index
+    description*: string
+    resolvedPath*: string  ## absolute path for file: sources (filled on load)
+
+  Registry* = object
+    path*: string          ## index file path
+    packages*: seq[RegistryPackage]
+
+proc resolvePackageSource(pkg: var RegistryPackage, indexDir: string) =
+  if pkg.source.startsWith("file:"):
+    var p = pkg.source["file:".len .. ^1]
+    if p.startsWith("//"):
+      p = p[2 .. ^1]
+    if not p.isAbsolute:
+      p = indexDir / p
+    pkg.resolvedPath = p.absolutePath
+  elif pkg.source.startsWith("path:"):
+    var p = pkg.source["path:".len .. ^1]
+    if not p.isAbsolute:
+      p = indexDir / p
+    pkg.resolvedPath = p.absolutePath
+    pkg.source = "file:" & pkg.resolvedPath
+
+proc parseRegistryToml(content, indexPath: string): seq[RegistryPackage] =
+  ## Minimal parser for repeated [[package]] blocks with string keys.
+  result = @[]
+  var cur: RegistryPackage
+  var inPkg = false
+  let indexDir = indexPath.parentDir
+
+  for raw in content.splitLines():
+    let line = raw.strip()
+    if line.len == 0 or line.startsWith("#"):
+      continue
+    if line == "[[package]]" or line == "[[Package]]":
+      if inPkg and cur.name.len > 0:
+        resolvePackageSource(cur, indexDir)
+        result.add(cur)
+      cur = RegistryPackage()
+      inPkg = true
+      continue
+    if not inPkg:
+      continue
+    let eq = line.find('=')
+    if eq < 0: continue
+    let key = line[0 ..< eq].strip().toLowerAscii()
+    var val = line[eq + 1 .. ^1].strip()
+    if val.len >= 2 and val[0] == '"' and val[^1] == '"':
+      val = val[1 ..< ^1]
+    case key
+    of "name": cur.name = val
+    of "version": cur.version = val
+    of "source": cur.source = val
+    of "description": cur.description = val
+    else: discard
+  if inPkg and cur.name.len > 0:
+    resolvePackageSource(cur, indexDir)
+    result.add(cur)
+
+proc findRegistryIndex*(): string =
+  ## Locate the registry index file.
+  let env = getEnv("BUX_REGISTRY")
+  if env.len > 0 and fileExists(env):
+    return env.absolutePath
+  let homeIdx = getHomeDir() / ".bux" / "registry.toml"
+  if fileExists(homeIdx):
+    return homeIdx
+  let candidates = @[
+    getAppDir() / ".." / "config" / "registry.toml",
+    getAppDir() / "config" / "registry.toml",
+    getCurrentDir() / "config" / "registry.toml",
+    getCurrentDir() / ".." / "config" / "registry.toml",
+  ]
+  for c in candidates:
+    if fileExists(c):
+      return c.absolutePath
+  return ""
+
+proc loadRegistry*(path: string = ""): Registry =
+  result.path = if path.len > 0: path else: findRegistryIndex()
+  result.packages = @[]
+  if result.path.len == 0 or not fileExists(result.path):
+    return
+  try:
+    let content = readFile(result.path)
+    result.packages = parseRegistryToml(content, result.path)
+  except CatchableError:
+    result.packages = @[]
+
+proc registryLookup*(reg: Registry, name: string, versionReq: string = "*"): RegistryPackage =
+  ## Find a package by name. versionReq `*` picks the last matching entry
+  ## (index order; put newest last). Exact version matches preferred.
+  result = RegistryPackage()
+  var candidates: seq[RegistryPackage] = @[]
+  for p in reg.packages:
+    if p.name.toLowerAscii() == name.toLowerAscii():
+      candidates.add(p)
+  if candidates.len == 0:
+    return
+  if versionReq.len == 0 or versionReq == "*":
+    return candidates[^1]
+  for p in candidates:
+    if p.version == versionReq:
+      return p
+  # Semver prefix match: "1" matches "1.0.0"
+  for p in candidates:
+    if p.version.startsWith(versionReq):
+      return p
+  return candidates[^1]
+
+proc registrySearch*(reg: Registry, query: string): seq[RegistryPackage] =
+  result = @[]
+  let q = query.toLowerAscii()
+  for p in reg.packages:
+    if q.len == 0 or
+       q in p.name.toLowerAscii() or
+       q in p.description.toLowerAscii():
+      result.add(p)
+  result.sort(proc (a, b: RegistryPackage): int =
+    cmp(a.name.toLowerAscii(), b.name.toLowerAscii()))
+
+proc isGitSource*(source: string): bool =
+  source.startsWith("http://") or source.startsWith("https://") or
+    source.startsWith("git@") or source.startsWith("git://") or
+    source.startsWith("ssh://")
+
+proc isFileSource*(source: string): bool =
+  source.startsWith("file:") or source.startsWith("path:")
+
+proc formatRegistryDepLine*(name: string, pkg: RegistryPackage): string =
+  ## Produce a bux.toml Dependencies line for a resolved registry package.
+  if pkg.resolvedPath.len > 0 and dirExists(pkg.resolvedPath):
+    return &"{name} = {{ Path = \"{pkg.resolvedPath}\" }}"
+  if isGitSource(pkg.source):
+    let ver = if pkg.version.len > 0: pkg.version else: "*"
+    return &"{name} = {{ Version = \"{ver}\", Source = \"{pkg.source}\" }}"
+  if isFileSource(pkg.source) and pkg.resolvedPath.len > 0:
+    return &"{name} = {{ Path = \"{pkg.resolvedPath}\" }}"
+  # Fallback: version-only (install will re-resolve)
+  let ver = if pkg.version.len > 0: pkg.version else: "*"
+  return &"{name} = \"{ver}\""

bootstrap/sema.nim

@@ -51,6 +51,11 @@ type
     ## When true, ekIdent skips use-while-borrowed (we're forming `&x` itself)
     suppressUseWhileBorrow*: bool
     currentRetType*: Type    ## return type of the function being checked
+    ## Lifetime elision / ref-origin tracking (@[Checked] only)
+    ## Binding name → lifetime id ("'a", "#elided0", "#local", …)
+    varRefLifetime*: Table[string, string]
+    ## Expected lifetime of the function's returned reference ("" if ret is not a ref)
+    returnLifetime*: string
     closureDepth*: int       ## nesting depth inside closures
     currentClosureExpr*: Expr  ## current closure being analyzed
     closureScope*: Scope     ## scope at which the current closure was entered
@@ -164,6 +169,138 @@ proc checkTempMutBorrow(sema: var Sema, varName: string, loc: SourceLocation) =
   elif sema.activeSharedBorrows.getOrDefault(varName, 0) > 0:
     sema.emitError(loc, &"cannot mutably borrow '{varName}' while it is shared-borrowed")
 
+# ---------------------------------------------------------------------------
+# Lifetime elision (C.1) — Rust-style simple rules for @[Checked]
+# ---------------------------------------------------------------------------
+#
+# Rules (common cases, no annotations required):
+#   1. Each elided input reference (&T / &mut T param) gets a distinct lifetime.
+#   2. If there is exactly one input lifetime, it is assigned to all elided outputs.
+#   3. If the first param is `self` / `Self`, its lifetime is preferred for outputs.
+#   4. Multiple input refs + elided return → error (need explicit `'a`).
+#   5. Returning a reference derived from a local (or by-value param) is rejected.
+#
+
+const
+  LifetimeLocal* = "#local"       ## ref derived from a local / by-value place
+  LifetimeOutNone* = "#out"       ## return ref with no input to borrow from
+  LifetimeAmbiguous* = "#ambiguous"
+
+proc isRefTypeExpr(te: TypeExpr): bool =
+  te != nil and te.kind in {tekRef, tekMutRef}
+
+proc applyLifetimeElision*(sema: var Sema, decl: Decl) =
+  ## Assign elided lifetimes for ref params/return of `decl`. Populates
+  ## `varRefLifetime` (params) and `returnLifetime`.
+  sema.varRefLifetime = initTable[string, string]()
+  sema.returnLifetime = ""
+  if not sema.checkedFunc:
+    return
+
+  var inputLts: seq[string] = @[]
+  var anon = 0
+  for p in decl.declFuncParams:
+    if not isRefTypeExpr(p.ptype):
+      continue
+    var lt = p.ptype.refLifetime
+    if lt.len == 0:
+      lt = "#elided" & $anon
+      inc anon
+    inputLts.add(lt)
+    sema.varRefLifetime[p.name] = lt
+
+  let ret = decl.declFuncReturnType
+  if not isRefTypeExpr(ret):
+    return
+
+  var rlt = ret.refLifetime
+  if rlt.len == 0:
+    if inputLts.len == 1:
+      rlt = inputLts[0]
+    elif inputLts.len == 0:
+      rlt = LifetimeOutNone
+    elif decl.declFuncParams.len > 0 and
+         decl.declFuncParams[0].name in ["self", "Self"]:
+      rlt = inputLts[0]
+    else:
+      sema.emitError(decl.loc,
+        "lifetime elision failed: return type needs an explicit lifetime " &
+        "(multiple input references); e.g. func F<'a>(a: &'a T, b: &'a U) -> &'a T")
+      rlt = LifetimeAmbiguous
+  sema.returnLifetime = rlt
+
+proc exprRefLifetime*(sema: Sema, expr: Expr, scope: Scope): string =
+  ## Best-effort lifetime of a reference-producing expression.
+  if expr == nil:
+    return ""
+  case expr.kind
+  of ekIdent:
+    if sema.varRefLifetime.hasKey(expr.exprIdent):
+      return sema.varRefLifetime[expr.exprIdent]
+    return ""
+  of ekUnary:
+    if expr.exprUnaryOp == tkAmp:
+      let name = extractBorrowedIdent(expr)
+      if name.len == 0:
+        return LifetimeLocal
+      # Reborrow of an existing ref binding keeps its lifetime
+      if sema.varRefLifetime.hasKey(name):
+        return sema.varRefLifetime[name]
+      # Address-of a by-value local or by-value parameter → local (dangling if returned)
+      return LifetimeLocal
+    # Dereference: *r still carries r's lifetime for field/ref purposes
+    if expr.exprUnaryOp == tkStar:
+      return sema.exprRefLifetime(expr.exprUnaryOperand, scope)
+    return ""
+  of ekBorrow:
+    # `borrow &x` / `borrow &mut x` — same origin rules as unary &
+    if expr.exprBorrowOperand != nil:
+      return sema.exprRefLifetime(expr.exprBorrowOperand, scope)
+    return LifetimeLocal
+  of ekField:
+    # Field projection through a ref keeps the base lifetime: (*p).x or p.x
+    if expr.exprFieldObj != nil:
+      let baseLt = sema.exprRefLifetime(expr.exprFieldObj, scope)
+      if baseLt.len > 0:
+        return baseLt
+      # Base is an ident of a struct local — field address would be local
+      if expr.exprFieldObj.kind == ekIdent:
+        if sema.varRefLifetime.hasKey(expr.exprFieldObj.exprIdent):
+          return sema.varRefLifetime[expr.exprFieldObj.exprIdent]
+        return LifetimeLocal
+    return ""
+  else:
+    return ""
+
+proc checkReturnLifetime*(sema: var Sema, retExpr: Expr, scope: Scope, loc: SourceLocation) =
+  ## Reject dangling returns and explicit lifetime mismatches in @[Checked].
+  if not sema.checkedFunc or sema.returnLifetime.len == 0 or retExpr == nil:
+    return
+  let got = sema.exprRefLifetime(retExpr, scope)
+  if sema.returnLifetime == LifetimeOutNone:
+    sema.emitError(loc,
+      "cannot return a reference: function has no input reference to borrow from")
+    return
+  if got == LifetimeLocal:
+    sema.emitError(loc, "cannot return reference to local variable")
+    return
+  if got.len == 0:
+    # Non-trivial expression (call, etc.) — leave for later analysis
+    return
+  if got == LifetimeAmbiguous or sema.returnLifetime == LifetimeAmbiguous:
+    return
+  # Explicit lifetime mismatch (both sides named with ')
+  if got.startsWith("'") and sema.returnLifetime.startsWith("'") and got != sema.returnLifetime:
+    sema.emitError(loc,
+      &"lifetime mismatch: returning '{got}' but function returns '{sema.returnLifetime}'")
+    return
+  # Distinct elided inputs returned into another elided input's return slot
+  if got.startsWith("#elided") and sema.returnLifetime.startsWith("#elided") and
+     got != sema.returnLifetime:
+    sema.emitError(loc,
+      "lifetime mismatch: returned reference does not outlive the return type " &
+      "(multiple input references; annotate with an explicit lifetime)")
+
 # ---------------------------------------------------------------------------
 # Generic type inference helpers
 # ---------------------------------------------------------------------------
@@ -472,7 +609,7 @@ proc inferTypeArgs(sema: var Sema, funcDecl: Decl, argTypes: seq[Type],
 # Type resolution from AST TypeExpr
 # ---------------------------------------------------------------------------
 
-proc resolveType(sema: var Sema, te: TypeExpr): Type =
+proc resolveType*(sema: var Sema, te: TypeExpr): Type =
   if te == nil:
     return makeUnknown()
   case te.kind
@@ -918,7 +1055,7 @@ proc collectGlobals*(sema: var Sema) =
 # Expression type checking
 # ---------------------------------------------------------------------------
 
-proc checkExpr(sema: var Sema, expr: Expr, scope: Scope): Type
+proc checkExpr*(sema: var Sema, expr: Expr, scope: Scope): Type
 proc checkStmt(sema: var Sema, stmt: Stmt, scope: Scope): Type
 
 proc typeImplements(sema: Sema, t: Type, interfaceName: string): bool =
@@ -1099,7 +1236,7 @@ proc resolveCallArgs(sema: var Sema, expr: Expr, calleeDecl: Decl, scope: Scope)
   expr.exprCallArgs = newArgs
   expr.exprCallArgNames = newNames
 
-proc checkExpr(sema: var Sema, expr: Expr, scope: Scope): Type =
+proc checkExpr*(sema: var Sema, expr: Expr, scope: Scope): Type =
   if expr == nil:
     return makeUnknown()
   case expr.kind
@@ -1835,6 +1972,11 @@ proc checkStmt(sema: var Sema, stmt: Stmt, scope: Scope): Type =
           # Untyped let + `&x` is typed as &mut by unary lowering
           isMut = initType.isMutRef
         sema.checkCreateBorrow(bname, isMut, stmt.stmtLetInit.loc)
+      # Propagate ref lifetime to the new binding (for return-site checks)
+      if declaredType.isRef or declaredType.isMutRef or initType.isRef or initType.isMutRef:
+        let lt = sema.exprRefLifetime(stmt.stmtLetInit, scope)
+        if lt.len > 0:
+          sema.varRefLifetime[stmt.stmtLetName] = lt
     return makeVoid()
   of skIf:
     let condType = sema.checkExpr(stmt.stmtIfCond, scope)
@@ -1897,6 +2039,8 @@ proc checkStmt(sema: var Sema, stmt: Stmt, scope: Scope): Type =
         let retSym = scope.lookup(stmt.stmtReturnValue.exprIdent)
         if retSym != nil and retSym.isOwn:
           sema.movedVars.add(stmt.stmtReturnValue.exprIdent)
+      # Lifetime: reject dangling returns / explicit mismatches
+      sema.checkReturnLifetime(stmt.stmtReturnValue, scope, stmt.loc)
     return makeVoid()
   of skBreak, skContinue:
     return makeVoid()
@@ -1951,9 +2095,15 @@ proc checkStmt(sema: var Sema, stmt: Stmt, scope: Scope): Type =
 proc checkFunc(sema: var Sema, decl: Decl) =
   if decl.declFuncBody == nil:
     return
-  # Skip body type-checking for generic functions — their bodies contain
+  # Skip body type-checking for type-generic functions — their bodies contain
   # type parameters that cannot be fully resolved until monomorphization.
-  if decl.declFuncTypeParams.len > 0:
+  # Lifetime-only params (`'a`) are fine: we still check the body for elision.
+  var hasTypeGeneric = false
+  for tp in decl.declFuncTypeParams:
+    if not tp.isLifetime:
+      hasTypeGeneric = true
+      break
+  if hasTypeGeneric:
     return
   let wasChecked = sema.checkedFunc
   let wasAsync = sema.currentFuncIsAsync
@@ -1963,10 +2113,18 @@ proc checkFunc(sema: var Sema, decl: Decl) =
     sema.movedVars = @[]
     sema.activeMutBorrows = initTable[string, SourceLocation]()
     sema.activeSharedBorrows = initTable[string, int]()
+    # C.1: elide lifetimes on params / return before walking the body
+    sema.applyLifetimeElision(decl)
+  else:
+    sema.varRefLifetime = initTable[string, string]()
+    sema.returnLifetime = ""
   var funcScope = newScope(sema.globalScope)
   # Add type parameters to type table for resolution
   var addedTypeParams: seq[string] = @[]
   for tp in decl.declFuncTypeParams:
+    if tp.isLifetime:
+      # Lifetime params are not types; skip typeTable
+      continue
     sema.typeTable[tp.name] = makeTypeParam(tp.name)
     addedTypeParams.add(tp.name)
   # Add parameters
@@ -1982,6 +2140,8 @@ proc checkFunc(sema: var Sema, decl: Decl) =
     sema.typeTable.del(tp)
   sema.checkedFunc = wasChecked
   sema.currentFuncIsAsync = wasAsync
+  sema.varRefLifetime = initTable[string, string]()
+  sema.returnLifetime = ""
 
 # ---------------------------------------------------------------------------
 # Second pass: check all function bodies
@@ -2026,3 +2186,16 @@ proc analyzeFull*(modu: Module): tuple[result: SemaResult, sema: Sema] =
   sema.collectGlobals()
   sema.checkBodies()
   result = (SemaResult(diagnostics: sema.diagnostics), sema)
+
+proc checkExprForLsp*(sema: var Sema, expr: Expr, scope: Scope): Type =
+  ## Type-check an expression for IDE use (no borrow/move side effects).
+  let wasChecked = sema.checkedFunc
+  let savedMoved = sema.movedVars
+  let savedMut = sema.activeMutBorrows
+  let savedShared = sema.activeSharedBorrows
+  sema.checkedFunc = false
+  result = sema.checkExpr(expr, scope)
+  sema.checkedFunc = wasChecked
+  sema.movedVars = savedMoved
+  sema.activeMutBorrows = savedMut
+  sema.activeSharedBorrows = savedShared

config/registry.toml

@@ -0,0 +1,22 @@
+# Bux package registry index (E.1)
+# Used by `bux add <name>` and `bux install` when no --path/--git is given.
+#
+# Override with: export BUX_REGISTRY=/path/to/registry.toml
+# Or copy to:    ~/.bux/registry.toml
+#
+# source forms:
+#   file:relative/or/absolute   — local package (relative to this file)
+#   path:relative/or/absolute   — same as file:
+#   https://...git              — git clone into ~/.bux/packages/<name>
+
+[[package]]
+name = "greet"
+version = "0.1.0"
+source = "file:../registry/packages/greet"
+description = "Tiny Hello helper library (demo registry package)"
+
+[[package]]
+name = "greet"
+version = "0.1.1"
+source = "file:../registry/packages/greet"
+description = "Tiny Hello helper library (demo registry package, patch)"

docs/BuildAndTest.md

@@ -152,15 +152,60 @@ This runs:
 
 ### Project Tests (`bux test`)
 ```bash
-./buxc test
+./buxc test                    # run all tests/*.bux in the current package
+./buxc test --filter first     # only tests whose name contains "first"
+./buxc test --filter=first _test_runner
 ```
 
-Builds the project and runs the resulting binary. Reports:
-- `Tests passed` on exit code 0
-- `Tests failed (exit code N)` on non-zero exit
+Discovers `tests/*.bux`, builds each as a temp package, and runs it. Prints a
+summary table and exits:
+- `0` — all selected tests passed
+- `1` — at least one failure, or no tests matched the filter
 
 Use `Std::Test` module for assertions inside test code.
 
+### Format (`bux fmt`)
+```bash
+./buxc fmt examples/hello.bux  # reformat one file
+./buxc fmt lib/                # reformat a directory tree
+make fmt                       # reformat lib/ examples/ src/ tests/ apps/
+./buxc fmt --check path/       # exit 1 if any file would change
+make fmt-check                 # CI: full-tree clean + dirty smoke
+```
+
+Indentation is 4 spaces by brace depth. The formatter is idempotent (safe to re-run).
+`make fmt-check` enforces a clean tree under `lib/`, `examples/`, `src/`, `tests/`, and `apps/`.
+
+### Stdlib golden tests
+```bash
+make test-stdlib
+# or: tests/stdlib_golden/run.sh ./buxc
+```
+
+Behavioral packages under `tests/stdlib_golden/` (`array`, `string`, `collections`)
+assert core Array/String/Map/Set/Result/Option APIs and match expected `PASS` lines.
+
+### API docs (`bux doc`)
+```bash
+./buxc doc lib/                      # Markdown to stdout
+./buxc doc --out docs/api/stdlib.md lib/
+make docs                            # writes docs/api/stdlib.md
+```
+
+Scans `///` line comments (and bootstrap also accepts adjacent `/* */`) immediately
+before `func` / `struct` / `enum` / `interface` / `module` declarations.
+
+### Language Server (`bux-lsp` 0.4.0)
+```bash
+make lsp                             # → tools/bux-lsp
+nim r --path:bootstrap tools/test_lsp_locals.nim
+./tools/smoke_lsp_hover.sh
+```
+
+Features: diagnostics (`buxc check`), hover, go-to-def, outline, completion.
+**Locals are position-sensitive** (nested scopes / shadowing). **Inferred `let` types**
+appear on hover (`let x: int · inferred`).
+
 ### Example Programs
 ```bash
 make test-examples

docs/LanguageRef.md

@@ -604,6 +604,44 @@ Moves happen in three contexts:
   msg = "reassigned";    // OK: reinitialization
   PrintLine(msg);
   ```
+- **No dangling returns**: cannot return a reference to a local (or by-value parameter)
+  ```bux
+  @[Checked]
+  func Bad(p: &int) -> &int {
+      var x: int = 1;
+      return &x;   // ERROR: cannot return reference to local variable
+  }
+  ```
+
+### Lifetime elision (C.1)
+
+In `@[Checked]` functions, most reference signatures need **no** lifetime annotations.
+Elision applies the usual single-input rules:
+
+1. Each elided input `&T` / `&mut T` parameter gets a distinct lifetime.
+2. If there is **exactly one** input lifetime, it is assigned to all elided outputs.
+3. If the first parameter is named `self` / `Self`, that input lifetime is preferred for outputs.
+4. Multiple input references + elided return → **error** (write an explicit lifetime).
+
+```bux
+// Elided — one input ref, return shares its lifetime
+@[Checked]
+func Identity(p: &int) -> &int {
+    return p;   // OK
+}
+
+// Explicit — required when several inputs could be returned
+@[Checked]
+func Pick<'a>(a: &'a int, b: &'a int) -> &'a int {
+    return a;
+}
+
+// Syntax: &'a T  and  &mut / &'a mut T  (lifetime before `mut`)
+// Type parameters: func F<'a, T>(...)
+```
+
+Unchecked functions ignore lifetime rules (C-like). Explicit `'a` is optional
+documentation when a single input would already elide correctly.
 
 ---
 

docs/Packages.md

@@ -1,6 +1,8 @@
 # Bux Package Manager
 
-> **Status:** Implemented (Phase 9.1)
+> **Status:** Path + git + **local/file registry** (E.1). HTTP registry index URL optional later.
+
+See also: [SEMVER.md](SEMVER.md) for version policy.
 
 ---
 
@@ -20,52 +22,97 @@ License = "MIT"
 Output = "Bin"
 
 [Dependencies]
-Std  = "1.0"
-Json = { Version = "2.1", Source = "https://github.com/bux-lang/json" }
+greet = { Path = "/abs/path/to/greet" }
+Json  = { Version = "2.1", Source = "https://github.com/bux-lang/json" }
 Utils = { Path = "../Utils" }
+# Registry name-only (resolved by `bux add` / `bux install`):
+# greet = "0.1.1"
 ```
 
 ### Dependency Forms
 
 | Form | Example | Description |
 |------|---------|-------------|
-| Version string | `Std = "1.0"` | Registry dependency |
-| Wildcard | `Std = "*"` | Latest version |
+| Version string | `greet = "0.1.1"` | Registry dependency |
+| Wildcard | `greet = "*"` | Latest registry version |
 | Inline table (git) | `{ Version = "1.4", Source = "https://..." }` | Git URL + version |
 | Inline table (path) | `{ Path = "../Lib" }` | Local path dependency |
 
 ---
 
+## Package registry (E.1)
+
+### Index file
+
+Default locations (first hit wins):
+
+1. `$BUX_REGISTRY` — path to a `registry.toml`
+2. `~/.bux/registry.toml`
+3. `config/registry.toml` next to the Bux repo / compiler
+
+Format:
+
+```toml
+[[package]]
+name = "greet"
+version = "0.1.1"
+source = "file:../registry/packages/greet"   # relative to the index file
+description = "Hello helpers"
+
+[[package]]
+name = "net"
+version = "1.0.0"
+source = "https://github.com/example/bux-net.git"
+description = "TCP helpers"
+```
+
+`file:` / `path:` sources are resolved relative to the registry file.
+Git URLs are cloned into `~/.bux/packages/<name>/` on install.
+
+### CLI
+
+```bash
+# Search the index
+bux search
+bux search greet
+
+# Add by registry name (writes Path or git Source into bux.toml)
+bux add greet
+bux add greet 0.1.1
+
+# Explicit sources still work
+bux add utils --path "../utils"
+bux add network --git "https://github.com/bux-lang/network"
+
+# Resolve + write bux.lock
+bux install
+```
+
+Demo package in this monorepo: `registry/packages/greet` (registered in
+`config/registry.toml`). Smoke test: `tools/smoke_registry.sh`.
+
+---
+
 ## CLI Commands
 
 ### `bux add <name> [version]`
 
-Add a dependency to `bux.toml`.
+Add a dependency to `bux.toml` (registry / `--path` / `--git`).
 
-```bash
-# Add registry dependency
-bux add json "2.1"
+### `bux search [query]`
 
-# Add path-based dependency
-bux add utils --path "../utils"
-
-# Add git dependency
-bux add network --git "https://github.com/bux-lang/network"
-```
+List packages in the active registry (filter by name/description).
 
 ### `bux install`
 
 Resolve dependencies and generate `bux.lock`.
 
-```bash
-bux install
-```
-
 What it does:
 1. Reads `[Dependencies]` from `bux.toml`
 2. Resolves path-based deps (verifies directory exists)
-3. Clones/pulls git-based deps to `~/.bux/packages/<name>/`
-4. Generates `bux.lock` with exact versions and sources
+3. Clones git-based deps to `~/.bux/packages/<name>/`
+4. Resolves bare version names via the registry index
+5. Generates `bux.lock` with exact versions and sources
 
 ### `bux build` / `bux run`
 
@@ -84,10 +131,9 @@ Auto-generated. **Do not edit manually.**
 
 ```toml
 [[Package]]
-Name = "json"
-Version = "2.1.3"
-Source = "https://github.com/bux-lang/json"
-Checksum = "8dcb2a7f..."
+Name = "greet"
+Version = "0.1.1"
+Source = "/home/user/z-git/bux/bux/registry/packages/greet"
 
 [[Package]]
 Name = "utils"
@@ -103,7 +149,7 @@ The lockfile ensures **reproducible builds** — every developer gets the exact
 
 1. **Path-based** deps are resolved relative to the manifest directory
 2. **Git-based** deps are cloned to `~/.bux/packages/<name>/`
-3. **Version-based** deps (without Source) require a registry (future feature)
+3. **Version-based** deps look up `config/registry.toml` (or `$BUX_REGISTRY`)
 4. Dependencies are loaded from `<dep>/src/*.bux` at build time
 5. Later declarations shadow earlier ones (project > deps > stdlib)
 
@@ -114,8 +160,10 @@ The lockfile ensures **reproducible builds** — every developer gets the exact
 ```bash
 bux new mylib
 cd mylib
-# Edit src/Main.bux → module MyLib { pub func Add(...) }
-bux build       # Builds as library (Type = "lib")
+# Edit src/*.bux → module MyLib { func Add(...) }
+# Set Type = "lib" in bux.toml
+# Register in your registry.toml with source = "file:..."
+bux build
 ```
 
 ## Example: Using a Library

docs/QUALITY_PLAN.md

@@ -1,7 +1,7 @@
 # Bux — План към „добър“ език (v0.5 → v1.0)
 
 > **Дата:** 2026-07-18  
-> **Текущо:** v0.5.x — selfhost loop, gradual ownership, green threads, **43+ examples**, match + guards + **generic HOF inference** + pattern bindings + **`f"..."` interp** bootstrap+selfhost ✅  
+> **Текущо:** v0.5.x — selfhost, C.1, tooling, LSP 0.4, full-tree fmt, **package registry (E.1)** ✅  
 > **Цел:** Език, с който се пишат реални проекти комфортно, безопасно (по избор) и с надежден toolchain.
 
 ---
@@ -14,11 +14,11 @@
 | Sema / generics | Monomorphization, trait bounds basic | ★★★★☆ |
 | HIR → C | Tuples + fat `func` ABI в bootstrap **и** selfhost | ★★★★☆ |
 | Selfhost (`src/`) | ~12k LOC, binary-identical loop, closures+tuples | ★★★★★ |
-| Gradual ownership | `@[Checked]`, `&`/`&mut`, move, Drop | ★★★☆☆ (basic) |
+| Gradual ownership | `@[Checked]`, `&`/`&mut`, move, Drop, **lifetime elision** | ★★★★☆ |
 | Concurrency | M:N tasks + channels + async | ★★★★☆ |
 | Stdlib | Array/Map/Set/String/Iter HOF разширени | ★★★★☆ |
 | Tooling | `test-errors`, LSP diagnostics + hover/def/outline | ★★★★☆ |
-| Ecosystem / registry | path+git deps; няма централен registry | ★☆☆☆☆ |
+| Ecosystem / registry | path+git + **file registry index** (`bux search/add`) | ★★★☆☆ |
 | Документация | README + QUALITY_PLAN синхронизирани (2026-07-15) | ★★★★☆ |
 
 **Силна ниша:** gradual ownership (C-скорост на писане + opt-in Rust-safety).  
@@ -69,7 +69,7 @@
 
 | # | Задача | Защо | Статус |
 |---|--------|------|--------|
-| C.1 | Lifetime elision за common cases | Без `'a` в 90% от API-тата | ⏳ |
+| C.1 | Lifetime elision за common cases | Без `'a` в 90% от API-тата | ✅ bootstrap + selfhost |
 | C.2 | Exclusive `&mut` vs shared `&` data-flow | По-малко false negatives | ✅ let-bound + use-while + call conflict |
 | C.3 | Auto-drop edge cases (early return, branches) | RAII да е надежден | ✅ bootstrap + selfhost |
 | C.4 | `@[Release]` zero-cost path документация + golden tests | Killer story: safe default, free hot path | ✅ partial (unchecked path + goldens) |
@@ -78,21 +78,21 @@
 
 | # | Задача | Защо | Статус |
 |---|--------|------|--------|
-| D.1 | LSP: hover, go-to-def, diagnostics | IDE = adoption | ✅ hover/def/outline + **sema types on hover** (v0.3.0) + `buxc` diags |
-| D.2 | `bux fmt` стабилен + CI check | Единен style | ⏳ |
-| D.3 | `bux test` с `--filter`, exit codes, summary table | CI-friendly | ⏳ partial (`bux test` exists) |
-| D.4 | `bux doc` от `///` comments | Самодокументиращ се stdlib | ⏳ |
-| D.5 | Golden tests за stdlib modules | Регресии без изненади | ⏳ |
+| D.1 | LSP: hover, go-to-def, diagnostics | IDE = adoption | ✅ v0.4.0: **position-sensitive locals** + **inferred `let`** + sema hover |
+| D.2 | `bux fmt` стабилен + CI check | Единен style | ✅ full-tree format + `make fmt-check` enforce |
+| D.3 | `bux test` с `--filter`, exit codes, summary table | CI-friendly | ✅ `--filter` / summary / exit 0\|1 |
+| D.4 | `bux doc` от `///` comments | Самодокументиращ се stdlib | ✅ bootstrap+selfhost + `make docs` |
+| D.5 | Golden tests за stdlib modules | Регресии без изненади | ✅ `tests/stdlib_golden/` + `make test-stdlib` |
 
 ### E — Ecosystem & v1.0 (P2)
 
-| # | Задача | Защо |
-|---|--------|------|
-| E.1 | Package registry protocol (git/HTTP) | `bux add foo` без path hacks |
-| E.2 | 3–5 production-quality apps в `apps/` | Showcase |
-| E.3 | Language freeze + semver policy | Trust |
-| E.4 | Debugger/DWARF basics | Systems audience |
-| E.5 | Benchmarks vs C/Zig/Nim (micro + nexus) | Marketing + regression |
+| # | Задача | Защо | Статус |
+|---|--------|------|--------|
+| E.1 | Package registry protocol (git/HTTP) | `bux add foo` без path hacks | ✅ local index + file/git sources + `search` |
+| E.2 | 3–5 production-quality apps в `apps/` | Showcase | ⏳ partial (`nexus`, `boko`, `simpledb`, `jwt-pitbul`) |
+| E.3 | Language freeze + semver policy | Trust | ✅ draft `docs/SEMVER.md` |
+| E.4 | Debugger/DWARF basics | Systems audience | ⏳ |
+| E.5 | Benchmarks vs C/Zig/Nim (micro + nexus) | Marketing + regression | ⏳ |
 
 ---
 
@@ -114,10 +114,10 @@ A (stdlib ergonomics)  →  B (compiler holes)  →  C (ownership depth)
 
 - [ ] Всички examples + selfhost-loop + 3 apps минават на CI
 - [ ] Array/Map/String/Test API покрива 90% от ежедневните нужди
-- [ ] `@[Checked]` хваща use-after-move + double `&mut` в documented subset
-- [ ] `bux test` + `bux fmt` + `bux check` са default developer loop
-- [ ] LanguageRef синхронизиран с компилатора
-- [ ] Поне един външен проект (не в monorepo) build-ва с git dep
+- [x] `@[Checked]` хваща use-after-move + double `&mut` + dangling return / elision fail
+- [x] `bux test` + `bux fmt` + `bux check` са default developer loop (`--filter` / `--check` shipped)
+- [x] LanguageRef синхронизиран с компилатора (incl. C.1 elision)
+- [x] Поне един външен/temp проект build-ва с registry dep (`tools/smoke_registry.sh`)
 
 ---
 
@@ -388,8 +388,116 @@ A (stdlib ergonomics)  →  B (compiler holes)  →  C (ownership depth)
 
 ---
 
+## Сесия 24 (tooling — D.2 fmt --check + D.3 test --filter)
+
+1. **Bootstrap `bux fmt`** (`bootstrap/fmt.nim`):
+   - Indent-by-brace-depth formatter (parity with `src/fmt.bux`)
+   - `bux fmt [path...]` writes; `bux fmt --check` exits 1 if any file would change
+   - Collects single file or recursive `.bux` under directories
+2. **Bootstrap `bux test --filter`**:
+   - `--filter <s>` / `--filter=<s>` — only run `tests/*.bux` whose name contains `s`
+   - Summary table (`PASS` / `FAIL[:code]`) + `Results: N passed, M failed, T total`
+   - Exit `0` all pass, `1` failures or no match
+3. **Selfhost parity** (`src/cli.bux`, `src/fmt.bux`):
+   - `Fmt_WouldChange` / `Fmt_CheckFile`; `Cli_Fmt(dir, checkOnly)`
+   - `Cli_Test(dir, filter)` with summary + skip count; filter skips Main package run
+4. **CI hooks:** `make fmt-check` smoke (clean→0, dirty→1); full-tree enforce deferred
+   until a one-shot format pass on `lib/`/`examples/`
+5. **Idempotence fix:** drop trailing split-empty so re-format is a no-op
+6. Verified: unit suite + `./buxc test --filter first _test_runner` + selfhost `buxc2`
+   fmt/test parity
+
+---
+
+## Сесия 25 (Ownership 2.0 — C.1 lifetime elision)
+
+1. **Elision rules** in `@[Checked]` (`bootstrap/sema.nim`):
+   - Each elided input `&`/`&mut` → distinct `#elidedN`
+   - One input lifetime → assigned to elided return
+   - First param `self`/`Self` preferred when multiple inputs
+   - Multiple inputs + elided return → `lifetime elision failed` (need `'a`)
+2. **Return checks:**
+   - `cannot return reference to local variable` (`return &local` / let-bound local ref)
+   - `no input reference to borrow from` (return ref with zero input refs)
+   - Explicit `'a` mismatch between return and value
+3. **Body check for lifetime-only generics** (`func F<'a>(...)`) — no longer skipped
+4. **Diagnostics hints** for elision / dangling / mismatch
+5. **Tests:** 8 new borrow_test cases; goldens `return_local_ref`, `elision_multi_input`
+6. **Example:** `examples/lifetime_elision.bux` (Identity / explicit / ViaLet / self)
+7. LanguageRef + QUALITY_PLAN updated
+8. Verified: borrow_test 24/24, 9 error goldens, example runs
+
+## Сесия 26 (C.1 selfhost parity)
+
+1. **Lexer** (`src/lexer.bux` + `tkLifetime=111`): `'a` vs char `'x'` (same heuristic as bootstrap)
+2. **Parser:**
+   - `&'a T` / `&'a mut T` → `TypeExpr.refLifetime`
+   - `func F<'a, T>(…)` — lifetime params accepted and **skipped** for mono slots
+3. **Sema** lifetime elision (fixed 8-slot maps, same rules as bootstrap):
+   - single-input elision, `self` preference, multi-input fail
+   - return-local / no-input-ref / explicit mismatch
+   - let-bound ref lifetime propagation
+4. Fixed `checkFunc` else-branch that wiped `checkedFunc` when retType was void
+5. Verified: `buxc2 run lifetime_elision` PASS; goldens on buxc2 show same errors;
+   bootstrap still green; **selfhost-loop** expected IDENTICAL
+
+---
+
+## Сесия 27 (tooling — D.4 bux doc + D.5 stdlib goldens)
+
+1. **D.5 Stdlib goldens** (`tests/stdlib_golden/`):
+   - Packages: `array`, `string`, `collections` (Map/Set/Result/Option)
+   - `run.sh` builds via `buxc run` and matches expected PASS lines
+   - `make test-stdlib` wired into `make test`
+2. **D.4 `bux doc`**:
+   - Bootstrap: `bootstrap/docgen.nim` — `///` + adjacent `/* */`
+   - Selfhost: `Cli_Doc` line scanner for `///`
+   - `bux doc [--out file] [path]` (default path `lib/`)
+   - `make docs` → `docs/api/stdlib.md`
+3. **Stdlib docs:** `///` on Array / String / Test public helpers
+4. Verified: `make test-stdlib`, `./buxc doc lib/Array.bux | head`, selfhost build
+
+---
+
+## Сесия 28 (LSP v0.4.0 — position-sensitive locals + inferred lets)
+
+1. **`LocalBinding`** with scope range (`scopeStartLine`…`scopeEndLine`) per let/param
+2. **Sema-backed inference** (`checkExprForLsp` / `resolveType`):
+   - `let x = 42` → hover `let x: int` · inferred
+   - `let s: String = "…"` → annotated, not inferred
+   - params: `param a: int` visible for whole function
+3. **Position-sensitive** hover / go-to-def / completion (innermost scope wins on shadowing)
+4. Nested scopes: if/while/for/match/block arms
+5. Version **bux-lsp 0.4.0**; tests: `tools/test_lsp_locals.nim`, `tools/smoke_lsp_hover.sh`
+6. Verified: hover shows `let sum: int · inferred`, `param a: int`, `let n: int · inferred`
+
+---
+
+## Сесия 29 (full-tree `bux fmt` + CI enforce)
+
+1. **One-shot format** of `lib/` (33), `examples/` (23), `src/` (15), `tests/` (8), `apps/` (12)
+2. **Idempotent:** second `--check` → 0 would reformat on all trees
+3. **CI:** `make fmt-check` enforces full tree + dirty-path smoke (exit 1)
+4. **`make fmt`** helper to reformat the same roots
+5. Verified: `test-stdlib`, key examples, **selfhost + selfhost-loop IDENTICAL ✓**
+
+---
+
+## Сесия 30 (E.1 package registry + E.3 semver draft)
+
+1. **Registry index** (`config/registry.toml`, `$BUX_REGISTRY`, `~/.bux/registry.toml`)
+   - `[[package]]` with `name` / `version` / `source` / `description`
+   - `file:` / `path:` (relative to index) or git URL
+2. **CLI:** `bux search [q]`, `bux add <name>` resolves registry, `bux install` locks path/git
+3. **Demo package:** `registry/packages/greet` (`Greet_Hello`, `Greet_Version`)
+4. **Smoke:** `tools/smoke_registry.sh` / `make test-registry` — temp app outside tree
+5. **Semver policy:** `docs/SEMVER.md` (0.x vs 1.0, registry version match)
+6. Packages.md updated
+
+---
+
 ## Следващи стъпки
 
-1. C.1 Lifetime elision
-2. Phase D tooling: `bux fmt` CI, `bux test --filter`, golden stdlib tests
-3. LSP: position-sensitive locals; inferred `let` types
+1. E.2 polish apps / E.5 benchmarks
+2. HTTP-fetchable registry index URL (beyond local file)
+3. LSP: workspace rename / references (optional)

docs/SEMVER.md

@@ -0,0 +1,76 @@
+# Bux Semantic Versioning Policy
+
+> Status: Draft for v0.x → v1.0 freeze (E.3)
+
+Bux follows [Semantic Versioning 2.0.0](https://semver.org/) with the
+clarifications below.
+
+---
+
+## Version numbers
+
+```
+MAJOR.MINOR.PATCH[-prerelease]
+```
+
+| Component | When it increases |
+|-----------|-------------------|
+| **MAJOR** | Breaking language / stdlib / CLI changes |
+| **MINOR** | Backward-compatible features |
+| **PATCH** | Backward-compatible bug fixes |
+
+During **0.x** (pre-1.0):
+
+- `0.MINOR.PATCH` — MINOR may still introduce breaking changes (documented in
+  the release notes and `MIGRATION_*.sh` when needed).
+- Prefer deprecation warnings for at least one MINOR before removal when
+  practical.
+
+After **1.0.0** (language freeze):
+
+- Breaking changes require a MAJOR bump and a migration guide.
+- The Language Reference is the normative spec; compiler bugs that contradict
+  the ref are fixed without a MAJOR bump.
+
+---
+
+## What counts as “breaking”
+
+- Removing or renaming a public stdlib symbol
+- Changing the type or semantics of a public API
+- Changing CLI flags that scripts rely on (`build`, `test`, `fmt --check`, …)
+- Changing `bux.toml` / `bux.lock` fields in an incompatible way
+- Changing the fat `func` / tuple C ABI in a way that breaks linked code
+
+**Not breaking:**
+
+- New keywords that were previously valid identifiers only if reserved carefully
+  (prefer contextual keywords)
+- New diagnostics / stricter `@[Checked]` (document; may be gated)
+- Formatter whitespace-only changes
+
+---
+
+## Package versions (registry)
+
+Registry packages use the same MAJOR.MINOR.PATCH scheme.
+
+`bux add foo` / `bux add foo 0.1` resolution:
+
+| Request | Matches |
+|---------|---------|
+| `*` / omitted | Latest entry for `foo` in the index |
+| `0.1.1` | Exact version |
+| `0.1` | First version with that prefix (e.g. `0.1.1`) |
+
+Lockfiles pin the **resolved** version and source path/URL.
+
+---
+
+## Release checklist (maintainers)
+
+1. Update `docs/LanguageRef.md` if behaviour changed
+2. Update `docs/QUALITY_PLAN.md` / changelog notes
+3. Run `make test` (includes `fmt-check`, examples, goldens)
+4. Run `make selfhost-loop`
+5. Tag `vMAJOR.MINOR.PATCH`

docs/api/stdlib.md

@@ -0,0 +1,749 @@
+# API Reference
+
+Generated by `bux doc` from `///` and `/* */` documentation comments.
+
+## `Array`
+
+_Source: `lib/Array.bux`_
+
+### `Array` _struct_
+
+```bux
+struct Array<T> {
+```
+
+Growable contiguous buffer of `T` (len + capacity).
+
+### `Array_New` _func_
+
+```bux
+func Array_New<T>(cap: uint) -> Array<T> {
+```
+
+Create an empty array with the given initial capacity.
+
+### `Array_Push` _func_
+
+```bux
+func Array_Push<T>(self: *Array<T>, value: T) {
+```
+
+Append `value`, growing capacity if needed.
+
+### `Array_Get` _func_
+
+```bux
+func Array_Get<T>(self: *Array<T>, index: uint) -> T {
+```
+
+Element at `index` (bounds-checked unless `@[Release]`).
+
+### `Array_Set` _func_
+
+```bux
+func Array_Set<T>(self: *Array<T>, index: uint, value: T) {
+```
+
+Write `value` at `index` (bounds-checked unless `@[Release]`).
+
+### `Array_Len` _func_
+
+```bux
+func Array_Len<T>(self: *Array<T>) -> uint {
+```
+
+Number of live elements.
+
+### `Array_Free` _func_
+
+```bux
+func Array_Free<T>(self: *Array<T>) {
+```
+
+Free the backing buffer and reset length/capacity to zero.
+
+### `Array_Drop` _func_
+
+```bux
+func Array_Drop<T>(self: *Array<T>) {
+```
+
+Drop trait entry — same as `Array_Free`.
+
+### `Array_IsEmpty` _func_
+
+```bux
+func Array_IsEmpty<T>(self: *Array<T>) -> bool {
+```
+
+True if the array has no elements.
+
+### `Array_Cap` _func_
+
+```bux
+func Array_Cap<T>(self: *Array<T>) -> uint {
+```
+
+Current capacity (not length).
+
+### `Array_Clear` _func_
+
+```bux
+func Array_Clear<T>(self: *Array<T>) {
+```
+
+Drop length to zero; keeps allocated capacity.
+
+### `Array_Reserve` _func_
+
+```bux
+func Array_Reserve<T>(self: *Array<T>, minCap: uint) {
+```
+
+Ensure capacity is at least `minCap` (does not shrink).
+
+### `Array_First` _func_
+
+```bux
+func Array_First<T>(self: *Array<T>) -> T {
+```
+
+First element (bounds-checked if empty).
+
+### `Array_Last` _func_
+
+```bux
+func Array_Last<T>(self: *Array<T>) -> T {
+```
+
+Last element (bounds-checked if empty).
+
+### `Array_Pop` _func_
+
+```bux
+func Array_Pop<T>(self: *Array<T>) -> T {
+```
+
+Remove and return the last element (bounds-checked if empty).
+
+### `Array_Contains` _func_
+
+```bux
+func Array_Contains<T>(self: *Array<T>, value: T) -> bool {
+```
+
+Linear search: true if `value` is present (uses `==`).
+
+### `Array_IndexOf` _func_
+
+```bux
+func Array_IndexOf<T>(self: *Array<T>, value: T) -> int {
+```
+
+Index of first equal element, or `-1` if not found.
+
+### `Array_Extend` _func_
+
+```bux
+func Array_Extend<T>(self: *Array<T>, other: *Array<T>) {
+```
+
+Append all elements of `other` onto `self`.
+
+## `Channel`
+
+_Source: `lib/Channel.bux`_
+
+### `Channel_SendInt` _func_
+
+```bux
+func Channel_SendInt(ch: *Channel<int>, value: int) {
+```
+
+Convenience wrappers for common types
+
+## `Iter`
+
+_Source: `lib/Iter.bux`_
+
+### `Array_Iter` _func_
+
+```bux
+func Array_Iter<T>(arr: *Array<T>) -> Iter<T> {
+```
+
+Create an iterator from an Array
+
+### `Iter_HasNext` _func_
+
+```bux
+func Iter_HasNext<T>(it: *Iter<T>) -> bool {
+```
+
+Check if there are more elements
+
+### `Iter_Next` _func_
+
+```bux
+func Iter_Next<T>(it: *Iter<T>) -> T {
+```
+
+Get the next element and advance (undefined if HasNext is false)
+
+### `Iter_Peek` _func_
+
+```bux
+func Iter_Peek<T>(it: *Iter<T>) -> T {
+```
+
+Peek current element without advancing (undefined if HasNext is false)
+
+### `Iter_Reset` _func_
+
+```bux
+func Iter_Reset<T>(it: *Iter<T>) {
+```
+
+Reset iterator to the beginning
+
+### `Iter_Pos` _func_
+
+```bux
+func Iter_Pos<T>(it: *Iter<T>) -> uint {
+```
+
+Current position
+
+### `Iter_Len` _func_
+
+```bux
+func Iter_Len<T>(it: *Iter<T>) -> uint {
+```
+
+Remaining length
+
+### `Iter_Count` _func_
+
+```bux
+func Iter_Count<T>(it: *Iter<T>) -> uint {
+```
+
+Count remaining elements
+
+### `Iter_Skip` _func_
+
+```bux
+func Iter_Skip<T>(it: *Iter<T>, n: uint) {
+```
+
+Skip N elements
+
+### `Iter_Take` _func_
+
+```bux
+func Iter_Take<T>(it: *Iter<T>, n: uint) -> Iter<T> {
+```
+
+Take first N elements (by limiting len)
+
+### `Iter_AnyEq` _func_
+
+```bux
+func Iter_AnyEq<T>(it: *Iter<T>, value: T) -> bool {
+```
+
+True if any remaining element equals value
+
+### `Iter_AllEq` _func_
+
+```bux
+func Iter_AllEq<T>(it: *Iter<T>, value: T) -> bool {
+```
+
+True if every remaining element equals value (true if empty)
+
+### `Iter_Collect` _func_
+
+```bux
+func Iter_Collect<T>(it: *Iter<T>) -> Array<T> {
+```
+
+Collect remaining elements into a new Array
+
+### `Iter_Map` _func_
+
+```bux
+func Iter_Map<T, U>(it: *Iter<T>, f: func(T) -> U) -> Array<U> {
+```
+
+Map each remaining element through f: T → U, collect into Array<U>
+
+### `Iter_Filter` _func_
+
+```bux
+func Iter_Filter<T>(it: *Iter<T>, pred: func(T) -> bool) -> Array<T> {
+```
+
+Keep remaining elements for which pred returns true
+
+### `Iter_Fold` _func_
+
+```bux
+func Iter_Fold<T, Acc>(it: *Iter<T>, init: Acc, f: func(Acc, T) -> Acc) -> Acc {
+```
+
+Left-fold: f(f(...f(init, x0), x1), ...)
+
+### `Iter_ForEach` _func_
+
+```bux
+func Iter_ForEach<T>(it: *Iter<T>, f: func(T) -> int) {
+```
+
+Call f for each remaining element (return value of f is ignored)
+
+### `Iter_Any` _func_
+
+```bux
+func Iter_Any<T>(it: *Iter<T>, pred: func(T) -> bool) -> bool {
+```
+
+True if any remaining element satisfies pred
+
+### `Iter_All` _func_
+
+```bux
+func Iter_All<T>(it: *Iter<T>, pred: func(T) -> bool) -> bool {
+```
+
+True if all remaining elements satisfy pred (true if empty)
+
+### `Iter_SumInt` _func_
+
+```bux
+func Iter_SumInt(it: *Iter<int>) -> int {
+```
+
+Sum remaining ints (specialized fold)
+
+## `Json`
+
+_Source: `lib/Json.bux`_
+
+### `JsonValue` _struct_
+
+```bux
+struct JsonValue {
+```
+
+=== Core type ===
+
+### `Json_Null` _func_
+
+```bux
+func Json_Null() -> JsonValue {
+```
+
+=== Constructors ===
+
+### `Json_ArrayLen` _func_
+
+```bux
+func Json_ArrayLen(v: JsonValue) -> uint {
+```
+
+=== Array helpers ===
+
+### `Json_ObjectLen` _func_
+
+```bux
+func Json_ObjectLen(v: JsonValue) -> uint {
+```
+
+=== Object helpers ===
+
+### `Json_IsNull` _func_
+
+```bux
+func Json_IsNull(v: JsonValue) -> bool {
+```
+
+=== Accessors ===
+
+### `JsonParser` _struct_
+
+```bux
+struct JsonParser {
+```
+
+=== Parser ===
+
+### `Json_Parse` _func_
+
+```bux
+func Json_Parse(s: String) -> JsonValue {
+```
+
+=== Public parser ===
+
+### `Json_StringifyImpl` _func_
+
+```bux
+func Json_StringifyImpl(sb: *StringBuilder, v: JsonValue) {
+```
+
+=== Serializer ===
+
+## `Map`
+
+_Source: `lib/Map.bux`_
+
+### `Map_Remove` _func_
+
+```bux
+func Map_Remove<K, V>(m: *Map<K, V>, key: K) -> bool {
+```
+
+Remove key if present. Rebuilds the table to keep open-addressing correct.
+
+## `Net`
+
+_Source: `lib/Net.bux`_
+
+### `Net_Create` _func_
+
+```bux
+func Net_Create() -> int {
+```
+
+Create a TCP socket. Returns -1 on error.
+
+### `Net_SetReuse` _func_
+
+```bux
+func Net_SetReuse(fd: int) -> bool {
+```
+
+Enable SO_REUSEADDR on a socket.
+
+### `Net_Bind` _func_
+
+```bux
+func Net_Bind(fd: int, addr: String, port: int) -> bool {
+```
+
+Bind a socket to an address and port.
+
+### `Net_Listen` _func_
+
+```bux
+func Net_Listen(fd: int, backlog: int) -> bool {
+```
+
+Start listening for connections.
+
+### `Net_Accept` _func_
+
+```bux
+func Net_Accept(fd: int) -> int {
+```
+
+Accept a connection. Returns new fd or -1 on error.
+
+### `Net_Connect` _func_
+
+```bux
+func Net_Connect(fd: int, addr: String, port: int) -> bool {
+```
+
+Connect to a remote address and port.
+
+### `Net_Send` _func_
+
+```bux
+func Net_Send(fd: int, data: String) -> int {
+```
+
+Send data. Returns bytes sent or -1 on error.
+
+### `Net_Recv` _func_
+
+```bux
+func Net_Recv(fd: int, maxLen: int) -> String {
+```
+
+Receive up to maxLen bytes. Returns empty string on error/EOF.
+
+### `Net_Close` _func_
+
+```bux
+func Net_Close(fd: int) -> bool {
+```
+
+Close a socket.
+
+### `Net_LastError` _func_
+
+```bux
+func Net_LastError() -> String {
+```
+
+Get last socket error as a string.
+
+## `Option`
+
+_Source: `lib/Option.bux`_
+
+### `Option_Expect` _func_
+
+```bux
+func Option_Expect(o: Option, msg: String) -> int {
+```
+
+Unwrap Some or panic with a custom message
+
+### `Option_Or` _func_
+
+```bux
+func Option_Or(o: Option, other: Option) -> Option {
+```
+
+If o is Some return it, otherwise return other
+
+## `Os`
+
+_Source: `lib/Os.bux`_
+
+### `Os_Exit` _func_
+
+```bux
+func Os_Exit(code: int) {
+```
+
+Terminate the process with the given exit code
+
+## `Result`
+
+_Source: `lib/Result.bux`_
+
+### `Result_Expect` _func_
+
+```bux
+func Result_Expect(r: Result, msg: String) -> int {
+```
+
+Unwrap Ok or panic with a custom message
+
+### `Result_UnwrapErr` _func_
+
+```bux
+func Result_UnwrapErr(r: Result) -> String {
+```
+
+Extract Err payload (panics if Ok)
+
+### `Result_Or` _func_
+
+```bux
+func Result_Or(r: Result, other: Result) -> Result {
+```
+
+If r is Ok return it, otherwise return other
+
+## `Set`
+
+_Source: `lib/Set.bux`_
+
+### `Set_Remove` _func_
+
+```bux
+func Set_Remove<T>(s: *Set<T>, value: T) -> bool {
+```
+
+Remove value if present. Rebuilds the table to keep open-addressing correct.
+
+## `String`
+
+_Source: `lib/String.bux`_
+
+### `String_Len` _func_
+
+```bux
+func String_Len(s: String) -> uint {
+```
+
+Byte length of a C string (`strlen`).
+
+### `String_IsEmpty` _func_
+
+```bux
+func String_IsEmpty(s: String) -> bool {
+```
+
+True if the string has zero length.
+
+### `String_IsNull` _func_
+
+```bux
+func String_IsNull(s: String) -> bool {
+```
+
+True if the pointer is null.
+
+### `String_Eq` _func_
+
+```bux
+func String_Eq(a: String, b: String) -> bool {
+```
+
+Lexicographic equality.
+
+### `String_Concat` _func_
+
+```bux
+func String_Concat(a: String, b: String) -> String {
+```
+
+Allocate and return `a` concatenated with `b`.
+
+### `String_Copy` _func_
+
+```bux
+func String_Copy(s: String) -> String {
+```
+
+Heap-copy of `s`.
+
+### `String_StartsWith` _func_
+
+```bux
+func String_StartsWith(s: String, prefix: String) -> bool {
+```
+
+True if `s` begins with `prefix`.
+
+### `String_EndsWith` _func_
+
+```bux
+func String_EndsWith(s: String, suffix: String) -> bool {
+```
+
+True if `s` ends with `suffix`.
+
+### `String_Contains` _func_
+
+```bux
+func String_Contains(s: String, substr: String) -> bool {
+```
+
+True if `substr` occurs anywhere in `s`.
+
+### `String_IsBlank` _func_
+
+```bux
+func String_IsBlank(s: String) -> bool {
+```
+
+True if empty or only whitespace (space, tab, CR, LF).
+
+### `String_Repeat` _func_
+
+```bux
+func String_Repeat(s: String, count: uint) -> String {
+```
+
+Repeat `s`, `count` times (`count == 0` → empty string).
+
+### `String_ReplaceAll` _func_
+
+```bux
+func String_ReplaceAll(s: String, old: String, new: String) -> String {
+```
+
+Replace every non-overlapping occurrence of `old` with `new`.
+Empty `old` is a no-op (returns `s` unchanged). Safe if `new` contains `old`.
+
+## `Test`
+
+_Source: `lib/Test.bux`_
+
+### `Test_Exit` _func_
+
+```bux
+func Test_Exit(code: int) {
+```
+
+Exit the process with `code` (for test runners).
+
+### `Test_Assert` _func_
+
+```bux
+func Test_Assert(cond: bool) {
+```
+
+Assert `cond` is true; abort on failure.
+
+### `Test_AssertEqInt` _func_
+
+```bux
+func Test_AssertEqInt(a: int, b: int) {
+```
+
+Assert two ints are equal; print both values and exit 1 on mismatch.
+
+### `Test_AssertNeqInt` _func_
+
+```bux
+func Test_AssertNeqInt(a: int, b: int) {
+```
+
+Assert two ints differ.
+
+### `Test_AssertEqString` _func_
+
+```bux
+func Test_AssertEqString(a: String, b: String) {
+```
+
+Assert two strings are equal (`String_Eq`).
+
+### `Test_AssertEqBool` _func_
+
+```bux
+func Test_AssertEqBool(a: bool, b: bool) {
+```
+
+Assert two bools are equal.
+
+### `Test_AssertTrue` _func_
+
+```bux
+func Test_AssertTrue(cond: bool) {
+```
+
+Assert `cond` is true.
+
+### `Test_AssertFalse` _func_
+
+```bux
+func Test_AssertFalse(cond: bool) {
+```
+
+Assert `cond` is false.
+
+### `Test_Fail` _func_
+
+```bux
+func Test_Fail(msg: String) {
+```
+
+Fail the test with a message and exit 1.
+
+### `Test_Pass` _func_
+
+```bux
+func Test_Pass(msg: String) {
+```
+
+Print a PASS line (for human-readable runners / goldens).
+

examples/algebraic_enums.bux

@@ -10,20 +10,20 @@ enum Result {
 func Main() -> int {
     let r1: Result = Result { tag: Result_Ok };
     r1.data.Ok_0 = 42;
-    
+
     let r2: Result = Result { tag: Result_Err };
     r2.data.Err_0 = "error message";
-    
+
     if r1.tag == Result_Ok {
         PrintLine("r1 is Ok:");
         PrintInt(r1.data.Ok_0);
         PrintLine("");
     }
-    
+
     if r2.tag == Result_Err {
         PrintLine("r2 is Err:");
         PrintLine(r2.data.Err_0);
     }
-    
+
     return 0;
 }

examples/borrow.bux

@@ -1,8 +1,8 @@
 // borrow.bux — Test explicit borrow expressions
 
 struct Point {
-	x: int;
-	y: int;
+    x: int;
+    y: int;
 }
 
 // NOT @[Checked] — borrow keyword available everywhere

examples/enums.bux

@@ -23,12 +23,12 @@ func ColorName(c: Color) -> String {
 
 func Main() -> int {
     let myColor: Color = Color::Green;
-    
+
     PrintLine("My color is:");
     PrintLine(ColorName(myColor));
     PrintLine("Color value:");
     PrintInt(myColor as int);
     PrintLine("");
-    
+
     return 0;
 }

examples/extend_generic.bux

@@ -27,4 +27,4 @@ func Main() -> int {
     PrintLine("");
 
     return 0;
-}
+}

examples/factorial.bux

@@ -11,13 +11,13 @@ func Factorial(n: int) -> int {
 
 func Main() -> int {
     PrintLine("Factorials:");
-    
+
     var i: int = 1;
     while i <= 10 {
         let fact: int = Factorial(i);
         PrintLine(Fmt_Fmt2("{0}! = {1}", String_FromInt(i), String_FromInt(fact)));
         i = i + 1;
     }
-    
+
     return 0;
 }

examples/fibonacci.bux

@@ -11,13 +11,13 @@ func Fibonacci(n: int) -> int {
 
 func Main() -> int {
     PrintLine("Fibonacci sequence:");
-    
+
     var i: int = 0;
     while i < 10 {
         let fib: int = Fibonacci(i);
         PrintLine(Fmt_Fmt1("{0}", String_FromInt(fib)));
         i = i + 1;
     }
-    
+
     return 0;
 }

examples/generic_infer.bux

@@ -13,14 +13,14 @@ func Main() -> int {
     // Inferred: T = int
     let m1: int = Max(10, 20);
     let m2: int = Max(5, 3);
-    
+
     PrintLine("Max(10, 20) = ");
     PrintInt(m1);
     PrintLine("");
-    
+
     PrintLine("Max(5, 3) = ");
     PrintInt(m2);
     PrintLine("");
-    
+
     return 0;
-}
+}

examples/generic_infer2.bux

@@ -20,4 +20,4 @@ func Main() -> int {
     PrintInt(p.GetFirst());
     PrintLine("");
     return 0;
-}
+}

examples/generics.bux

@@ -13,14 +13,14 @@ func Max<T>(a: T, b: T) -> T {
 func Main() -> int {
     let m1: int = Max<int>(10, 20);
     let m2: int = Max<int>(5, 3);
-    
+
     PrintLine("Max(10, 20) = ");
     PrintInt(m1);
     PrintLine("");
-    
+
     PrintLine("Max(5, 3) = ");
     PrintInt(m2);
     PrintLine("");
-    
+
     return 0;
 }

examples/generics_struct.bux

@@ -31,21 +31,21 @@ func Main() -> int {
     PrintLine("Box value:");
     PrintInt(b.Get());
     PrintLine("");
-    
+
     b.Set(100);
     PrintLine("Box after Set(100):");
     PrintInt(b.Get());
     PrintLine("");
-    
+
     let p: Pair<int, String> = Pair<int, String> { first: 10, second: "hello" };
     PrintLine("Pair first:");
     PrintInt(p.GetFirst());
     PrintLine("");
-    
+
     let bp: *Box<int> = &b;
     PrintLine("Box via pointer:");
     PrintInt(bp.Get());
     PrintLine("");
-    
+
     return 0;
 }

examples/json.bux

@@ -5,20 +5,20 @@ import Std::Fmt::{Fmt_Fmt1, Fmt_FmtInt};
 
 func Main() -> int {
     PrintLine("=== Json Demo ===");
-    
+
     let s: String = "{\"name\":\"Bux\",\"count\":42,\"items\":[\"a\",\"b\",\"c\"]}";
     let j: JsonValue = Json_Parse(s);
     PrintLine("Parsed and stringified:");
     PrintLine(Json_Stringify(j));
-    
+
     PrintLine("\nAccess fields:");
     PrintLine(Fmt_Fmt1("name = {0}", Json_AsString(Json_ObjectGet(j, "name"))));
     PrintLine(Fmt_FmtInt("count = {0}", Json_AsNumber(Json_ObjectGet(j, "count")) as int64));
-    
+
     let items: JsonValue = Json_ObjectGet(j, "items");
     PrintLine(Fmt_Fmt1("items[0] = {0}", Json_AsString(Json_ArrayGet(items, 0))));
     PrintLine(Fmt_Fmt1("items[1] = {0}", Json_AsString(Json_ArrayGet(items, 1))));
-    
+
     PrintLine("\nBuild JSON programmatically:");
     var obj: JsonValue = Json_Object();
     Json_ObjectSet(&obj, "lang", Json_String("Bux"));
@@ -28,6 +28,6 @@ func Main() -> int {
     Json_ArrayPush(&arr, Json_String("safe"));
     Json_ObjectSet(&obj, "tags", arr);
     PrintLine(Json_Stringify(obj));
-    
+
     return 0;
 }

examples/jwt.bux

@@ -29,30 +29,30 @@ func Jwt_Create(payload: JsonValue, secret: String) -> String {
     let header: JsonValue = Json_Object();
     Json_ObjectSet(&header, "alg", Json_String("HS256"));
     Json_ObjectSet(&header, "typ", Json_String("JWT"));
-    
+
     let headerB64: String = Base64UrlEncode(Json_Stringify(header));
     let payloadB64: String = Base64UrlEncode(Json_Stringify(payload));
-    
+
     let signingInput: String = String_Concat(headerB64, ".");
     signingInput = String_Concat(signingInput, payloadB64);
-    
+
     let sigRaw: String = Crypto_HmacSha256Raw(secret, signingInput);
     let sigB64: String = Base64UrlEncodeSig(sigRaw);
-    
+
     return String_Concat(String_Concat(signingInput, "."), sigB64);
 }
 
 func Main() -> int {
     PrintLine("=== JWT Demo ===");
-    
+
     let payload: JsonValue = Json_Object();
     Json_ObjectSet(&payload, "sub", Json_String("user123"));
     Json_ObjectSet(&payload, "name", Json_String("Bux Developer"));
     Json_ObjectSet(&payload, "admin", Json_Bool(true));
-    
+
     let token: String = Jwt_Create(payload, "my-secret-key");
     PrintLine("Token:");
     PrintLine(token);
-    
+
     return 0;
 }

examples/lifetime_elision.bux

@@ -0,0 +1,51 @@
+// lifetime_elision.bux — C.1: elided lifetimes for common &[Checked] APIs
+// No 'a annotations needed when there is a single input reference.
+import Std::Io::{PrintLine, PrintInt};
+import Std::Test::{Test_AssertEqInt, Test_Pass};
+
+// Elided: param and return share one lifetime automatically
+@[Checked]
+func Identity(p: &int) -> &int {
+    return p;
+}
+
+// Explicit lifetime for documentation / multi-ref (same lifetime both sides)
+@[Checked]
+func IdentityNamed<'a>(p: &'a int) -> &'a int {
+return p;
+}
+
+// Via intermediate let binding — lifetime is propagated
+@[Checked]
+func ViaLet(p: &int) -> &int {
+    let r: &int = p;
+    return r;
+}
+
+// self-style first param: elision prefers the first input for the return
+@[Checked]
+func FirstOf(self: &int, _other: int) -> &int {
+    return self;
+}
+
+@[Checked]
+func Main() -> int {
+    var x: int = 10;
+    var y: int = 20;
+
+    let a: &int = Identity(&x);
+    Test_AssertEqInt(*a, 10);
+
+    let b: &int = IdentityNamed(&y);
+    Test_AssertEqInt(*b, 20);
+
+    let c: &int = ViaLet(&x);
+    Test_AssertEqInt(*c, 10);
+
+    let d: &int = FirstOf(&y, 0);
+    Test_AssertEqInt(*d, 20);
+
+    Test_Pass("lifetime_elision");
+    PrintLine("lifetime_elision: ok");
+    return 0;
+}

examples/map.bux

@@ -5,26 +5,26 @@ import Std::Map::{Map, Map_New, Map_Set, Map_Get, Map_Has, Map_Free};
 func Main() -> int {
     PrintLine("=== Map<int, String> ===");
     let m: Map<int, String> = Map_New<int, String>(16);
-    
+
     Map_Set<int, String>(&m, 1, "one");
     Map_Set<int, String>(&m, 2, "two");
     Map_Set<int, String>(&m, 3, "three");
-    
+
     PrintLine("Get 1:");
     PrintLine(Map_Get<int, String>(&m, 1));
-    
+
     PrintLine("Get 2:");
     PrintLine(Map_Get<int, String>(&m, 2));
-    
+
     if Map_Has<int, String>(&m, 1) {
         PrintLine("Has 1: yes");
     }
-    
+
     // Test update
     Map_Set<int, String>(&m, 2, "updated");
     PrintLine("Updated 2:");
     PrintLine(Map_Get<int, String>(&m, 2));
-    
+
     Map_Free<int, String>(&m);
     return 0;
-}
+}

examples/methods.bux

@@ -11,7 +11,7 @@ extend Rectangle {
     func Area(self: Rectangle) -> int {
         return self.width * self.height;
     }
-    
+
     func Perimeter(self: Rectangle) -> int {
         return 2 * (self.width + self.height);
     }
@@ -19,7 +19,7 @@ extend Rectangle {
 
 func Main() -> int {
     let rect: Rectangle = Rectangle { width: 10, height: 5 };
-    
+
     PrintLine("Rectangle:");
     PrintLine("Width = ");
     PrintInt(rect.width);
@@ -33,6 +33,6 @@ func Main() -> int {
     PrintLine("Perimeter = ");
     PrintInt(rect.Perimeter());
     PrintLine("");
-    
+
     return 0;
 }

examples/os_time.bux

@@ -9,16 +9,16 @@ func Main() -> int {
     PrintLine(Fmt_Fmt1("Current directory: {0}", Os_GetCwd()));
     PrintLine(Fmt_FmtInt("Command-line args: {0}", Os_ArgsCount() as int64));
     PrintLine(Fmt_Fmt1("HOME env: {0}", Os_GetEnv("HOME")));
-    
+
     PrintLine("\n=== Time Demo ===");
     let start: int64 = Time_NowMs();
     PrintLine(Fmt_FmtInt("Start: {0} ms", start));
     PrintLine("Sleeping 150ms...");
     Time_SleepMs(150);
-    
+
     let end: int64 = Time_NowMs();
     PrintLine(Fmt_FmtInt("End: {0} ms", end));
     PrintLine(Fmt_FmtInt("Elapsed: {0} ms", end - start));
-    
+
     return 0;
 }

examples/ownership.bux

@@ -23,17 +23,17 @@ func UncheckedSwap(a: *int, b: *int) {
 
 func Main() -> int {
     var x: int = 10;
-    
+
     // &mut allows mutation
     ScaleInPlace(&x, 3);
     PrintInt(x);  // 30
     PrintLine("");
-    
+
     // & allows reading
     let y: int = GetValue(&x);
     PrintInt(y);  // 30
     PrintLine("");
-    
+
     // Unchecked: raw pointers work like C
     var a: int = 5;
     var b: int = 7;
@@ -42,6 +42,6 @@ func Main() -> int {
     PrintLine("");
     PrintInt(b);  // 5
     PrintLine("");
-    
+
     return 0;
 }

examples/process.bux

@@ -5,12 +5,12 @@ import Std::Fmt::{Fmt_Fmt1, Fmt_FmtInt};
 
 func Main() -> int {
     PrintLine("Process demo:");
-    
+
     let output: String = Process_Output("echo Hello from subprocess");
     PrintLine(Fmt_Fmt1("Captured: {0}", output));
-    
+
     let rc: int = Process_Run("true");
     PrintLine(Fmt_FmtInt("Exit code: {0}", rc));
-    
+
     return 0;
 }

examples/result_option.bux

@@ -82,14 +82,14 @@ func SafeDivide(a: int, b: int) -> Option {
 
 func Main() -> int {
     PrintLine("Result demo:");
-    
+
     let r1: Result = Divide(10, 2);
     if Result_IsOk(r1) {
         PrintLine("10 / 2 = ");
         PrintInt(Result_Unwrap(r1));
         PrintLine("");
     }
-    
+
     let r2: Result = Divide(10, 0);
     if Result_IsErr(r2) {
         PrintLine("10 / 0 failed");
@@ -97,20 +97,20 @@ func Main() -> int {
     PrintLine("unwrap_or = ");
     PrintInt(Result_UnwrapOr(r2, -1));
     PrintLine("");
-    
+
     PrintLine("Option demo:");
-    
+
     let o1: Option = SafeDivide(20, 4);
     if Option_IsSome(o1) {
         PrintLine("20 / 4 = ");
         PrintInt(Option_UnwrapOr(o1, 0));
         PrintLine("");
     }
-    
+
     let o2: Option = SafeDivide(20, 0);
     PrintLine("20 / 0 fallback = ");
     PrintInt(Option_UnwrapOr(o2, -1));
     PrintLine("");
-    
+
     return 0;
 }

examples/strings.bux

@@ -5,30 +5,30 @@ import Std::String::{String_Len, String_Eq, String_Concat};
 func Main() -> int {
     let hello: String = "Hello";
     let world: String = "World";
-    
+
     PrintLine("String operations:");
-    
+
     // Length
     PrintLine("Length of 'Hello':");
     PrintInt(String_Len(hello));
     PrintLine("");
-    
+
     // Concatenation
     let greeting: String = String_Concat(hello, ", ");
     let greeting2: String = String_Concat(greeting, world);
     let full: String = String_Concat(greeting2, "!");
-    
+
     PrintLine("Concatenated:");
     PrintLine(full);
-    
+
     // Equality
     if String_Eq(hello, "Hello") {
         PrintLine("'Hello' equals 'Hello'");
     }
-    
+
     if !String_Eq(hello, world) {
         PrintLine("'Hello' does not equal 'World'");
     }
-    
+
     return 0;
 }

examples/strings2.bux

@@ -65,10 +65,10 @@ func Main() -> int {
     StringBuilder_Append(&sb, "World");
     StringBuilder_Append(&sb, "! #");
     StringBuilder_AppendInt(&sb, 42);
-    
+
     Print("StringBuilder: ");
     PrintLine(StringBuilder_Build(&sb));
     StringBuilder_Free(&sb);
 
     return 0;
-}
+}

examples/structs.bux

@@ -16,7 +16,7 @@ func Main() -> int {
     let p1: Point = Point { x: 10, y: 20 };
     let p2: Point = Point { x: 5, y: 15 };
     let sum: Point = AddPoints(p1, p2);
-    
+
     PrintLine("Point sum:");
     PrintLine("x = ");
     PrintInt(sum.x);
@@ -24,6 +24,6 @@ func Main() -> int {
     PrintLine("y = ");
     PrintInt(sum.y);
     PrintLine("");
-    
+
     return 0;
 }

examples/try_operator.bux

@@ -39,7 +39,7 @@ func ComputeWithError() -> Result {
 
 func Main() -> int {
     PrintLine("Try operator demo:");
-    
+
     let r1: Result = Compute();
     if r1.tag == Result_Ok {
         PrintLine("Compute() = ");
@@ -48,11 +48,11 @@ func Main() -> int {
     } else {
         PrintLine("Compute() failed");
     }
-    
+
     let r2: Result = ComputeWithError();
     if r2.tag == Result_Err {
         PrintLine("ComputeWithError() failed as expected");
     }
-    
+
     return 0;
 }

lib/Array.bux

@@ -1,135 +1,143 @@
 module Std::Array {
 
-extern func bux_alloc(size: uint) -> *void;
-extern func bux_realloc(ptr: *void, size: uint) -> *void;
-extern func bux_free(ptr: *void);
-extern func bux_bounds_check(index: uint, len: uint);
+    extern func bux_alloc(size: uint) -> *void;
+    extern func bux_realloc(ptr: *void, size: uint) -> *void;
+    extern func bux_free(ptr: *void);
+    extern func bux_bounds_check(index: uint, len: uint);
 
-struct Array<T> {
-    data: *T,
-    len: uint,
-    cap: uint,
-}
+    /// Growable contiguous buffer of `T` (len + capacity).
+    struct Array<T> {
+        data: *T,
+        len: uint,
+        cap: uint,
+    }
 
-func Array_New<T>(cap: uint) -> Array<T> {
-    let data = bux_alloc(cap * sizeof(T)) as *T;
-    return Array<T> { data: data, len: 0, cap: cap };
-}
+    /// Create an empty array with the given initial capacity.
+    func Array_New<T>(cap: uint) -> Array<T> {
+        let data = bux_alloc(cap * sizeof(T)) as *T;
+        return Array<T> { data: data, len: 0, cap: cap };
+    }
 
-func Array_Push<T>(self: *Array<T>, value: T) {
-    if self.len >= self.cap {
-        self.cap = self.cap * 2;
+    /// Append `value`, growing capacity if needed.
+    func Array_Push<T>(self: *Array<T>, value: T) {
+        if self.len >= self.cap {
+            self.cap = self.cap * 2;
+            self.data = bux_realloc(self.data as *void, self.cap * sizeof(T)) as *T;
+        }
+        self.data[self.len] = value;
+        self.len = self.len + 1;
+    }
+
+    /// Element at `index` (bounds-checked unless `@[Release]`).
+    func Array_Get<T>(self: *Array<T>, index: uint) -> T {
+        bux_bounds_check(index, self.len);
+        return self.data[index];
+    }
+
+    /// Write `value` at `index` (bounds-checked unless `@[Release]`).
+    func Array_Set<T>(self: *Array<T>, index: uint, value: T) {
+        bux_bounds_check(index, self.len);
+        self.data[index] = value;
+    }
+
+    /// Number of live elements.
+    func Array_Len<T>(self: *Array<T>) -> uint {
+        return self.len;
+    }
+
+    /// Free the backing buffer and reset length/capacity to zero.
+    func Array_Free<T>(self: *Array<T>) {
+        bux_free(self.data as *void);
+        self.data = null as *T;
+        self.len = 0;
+        self.cap = 0;
+    }
+
+    /// Drop trait entry — same as `Array_Free`.
+    func Array_Drop<T>(self: *Array<T>) {
+        Array_Free<T>(self);
+    }
+
+    func Array_operator_index_get<T>(self: *Array<T>, idx: uint) -> T {
+        return Array_Get<T>(self, idx);
+    }
+
+    func Array_operator_index_set<T>(self: *Array<T>, idx: uint, value: T) {
+        Array_Set<T>(self, idx, value);
+    }
+
+    /// True if the array has no elements.
+    func Array_IsEmpty<T>(self: *Array<T>) -> bool {
+        return self.len == 0;
+    }
+
+    /// Current capacity (not length).
+    func Array_Cap<T>(self: *Array<T>) -> uint {
+        return self.cap;
+    }
+
+    /// Drop length to zero; keeps allocated capacity.
+    func Array_Clear<T>(self: *Array<T>) {
+        self.len = 0;
+    }
+
+    /// Ensure capacity is at least `minCap` (does not shrink).
+    func Array_Reserve<T>(self: *Array<T>, minCap: uint) {
+        if minCap <= self.cap {
+            return;
+        }
+        self.cap = minCap;
         self.data = bux_realloc(self.data as *void, self.cap * sizeof(T)) as *T;
     }
-    self.data[self.len] = value;
-    self.len = self.len + 1;
-}
 
-func Array_Get<T>(self: *Array<T>, index: uint) -> T {
-    bux_bounds_check(index, self.len);
-    return self.data[index];
-}
-
-func Array_Set<T>(self: *Array<T>, index: uint, value: T) {
-    bux_bounds_check(index, self.len);
-    self.data[index] = value;
-}
-
-func Array_Len<T>(self: *Array<T>) -> uint {
-    return self.len;
-}
-
-func Array_Free<T>(self: *Array<T>) {
-    bux_free(self.data as *void);
-    self.data = null as *T;
-    self.len = 0;
-    self.cap = 0;
-}
-
-func Array_Drop<T>(self: *Array<T>) {
-    Array_Free<T>(self);
-}
-
-func Array_operator_index_get<T>(self: *Array<T>, idx: uint) -> T {
-    return Array_Get<T>(self, idx);
-}
-
-func Array_operator_index_set<T>(self: *Array<T>, idx: uint, value: T) {
-    Array_Set<T>(self, idx, value);
-}
-
-/* True if the array has no elements */
-func Array_IsEmpty<T>(self: *Array<T>) -> bool {
-    return self.len == 0;
-}
-
-/* Current capacity (not length) */
-func Array_Cap<T>(self: *Array<T>) -> uint {
-    return self.cap;
-}
-
-/* Drop length to zero; keeps allocated capacity */
-func Array_Clear<T>(self: *Array<T>) {
-    self.len = 0;
-}
-
-/* Ensure capacity is at least minCap (does not shrink) */
-func Array_Reserve<T>(self: *Array<T>, minCap: uint) {
-    if minCap <= self.cap {
-        return;
+    /// First element (bounds-checked if empty).
+    func Array_First<T>(self: *Array<T>) -> T {
+        return Array_Get<T>(self, 0);
     }
-    self.cap = minCap;
-    self.data = bux_realloc(self.data as *void, self.cap * sizeof(T)) as *T;
-}
 
-/* First element (panics if empty via bounds check) */
-func Array_First<T>(self: *Array<T>) -> T {
-    return Array_Get<T>(self, 0);
-}
+    /// Last element (bounds-checked if empty).
+    func Array_Last<T>(self: *Array<T>) -> T {
+        return Array_Get<T>(self, self.len - 1);
+    }
 
-/* Last element (panics if empty via bounds check) */
-func Array_Last<T>(self: *Array<T>) -> T {
-    return Array_Get<T>(self, self.len - 1);
-}
+    /// Remove and return the last element (bounds-checked if empty).
+    func Array_Pop<T>(self: *Array<T>) -> T {
+        bux_bounds_check(0, self.len);
+        self.len = self.len - 1;
+        return self.data[self.len];
+    }
 
-/* Remove and return the last element (panics if empty) */
-func Array_Pop<T>(self: *Array<T>) -> T {
-    bux_bounds_check(0, self.len);
-    self.len = self.len - 1;
-    return self.data[self.len];
-}
-
-/* Linear search: true if value is present (uses ==) */
-func Array_Contains<T>(self: *Array<T>, value: T) -> bool {
-    var i: uint = 0;
-    while i < self.len {
-        if self.data[i] == value {
-            return true;
+    /// Linear search: true if `value` is present (uses `==`).
+    func Array_Contains<T>(self: *Array<T>, value: T) -> bool {
+        var i: uint = 0;
+        while i < self.len {
+            if self.data[i] == value {
+                return true;
+            }
+            i = i + 1;
         }
-        i = i + 1;
+        return false;
     }
-    return false;
-}
 
-/* Index of first equal element, or -1 if not found */
-func Array_IndexOf<T>(self: *Array<T>, value: T) -> int {
-    var i: uint = 0;
-    while i < self.len {
-        if self.data[i] == value {
-            return i as int;
+    /// Index of first equal element, or `-1` if not found.
+    func Array_IndexOf<T>(self: *Array<T>, value: T) -> int {
+        var i: uint = 0;
+        while i < self.len {
+            if self.data[i] == value {
+                return i as int;
+            }
+            i = i + 1;
         }
-        i = i + 1;
+        return -1;
     }
-    return -1;
-}
 
-/* Append all elements of other onto self */
-func Array_Extend<T>(self: *Array<T>, other: *Array<T>) {
-    var i: uint = 0;
-    while i < other.len {
-        Array_Push<T>(self, other.data[i]);
-        i = i + 1;
+    /// Append all elements of `other` onto `self`.
+    func Array_Extend<T>(self: *Array<T>, other: *Array<T>) {
+        var i: uint = 0;
+        while i < other.len {
+            Array_Push<T>(self, other.data[i]);
+            i = i + 1;
+        }
     }
-}
 
 }

lib/Channel.bux

@@ -1,64 +1,64 @@
 module Std::Channel {
 
-extern func bux_channel_new(capacity: int64, elem_size: int64) -> *void;
-extern func bux_channel_send(handle: *void, elem: *void);
-extern func bux_channel_recv(handle: *void, out: *void) -> int;
-extern func bux_channel_close(handle: *void);
-extern func bux_channel_free(handle: *void);
+    extern func bux_channel_new(capacity: int64, elem_size: int64) -> *void;
+    extern func bux_channel_send(handle: *void, elem: *void);
+    extern func bux_channel_recv(handle: *void, out: *void) -> int;
+    extern func bux_channel_close(handle: *void);
+    extern func bux_channel_free(handle: *void);
 
-struct Channel<T> {
-    handle: *void;
-}
+    struct Channel<T> {
+        handle: *void;
+    }
 
-func Channel_New<T>(capacity: int64) -> Channel<T> {
-    return Channel<T> { handle: bux_channel_new(capacity, sizeof(T)) };
-}
+    func Channel_New<T>(capacity: int64) -> Channel<T> {
+        return Channel<T> { handle: bux_channel_new(capacity, sizeof(T)) };
+    }
 
-func Channel_Send<T>(ch: *Channel<T>, value: T) {
-    bux_channel_send(ch.handle, (&value) as *void);
-}
+    func Channel_Send<T>(ch: *Channel<T>, value: T) {
+        bux_channel_send(ch.handle, (&value) as *void);
+    }
 
-func Channel_Recv<T>(ch: *Channel<T>) -> T {
-    var result: T;
-    bux_channel_recv(ch.handle, (&result) as *void);
-    return result;
-}
+    func Channel_Recv<T>(ch: *Channel<T>) -> T {
+        var result: T;
+        bux_channel_recv(ch.handle, (&result) as *void);
+        return result;
+    }
 
-func Channel_Recv_Ok<T>(ch: *Channel<T>, out: *T) -> bool {
-    return bux_channel_recv(ch.handle, out as *void) != 0;
-}
+    func Channel_Recv_Ok<T>(ch: *Channel<T>, out: *T) -> bool {
+        return bux_channel_recv(ch.handle, out as *void) != 0;
+    }
 
-func Channel_Close<T>(ch: *Channel<T>) {
-    bux_channel_close(ch.handle);
-}
+    func Channel_Close<T>(ch: *Channel<T>) {
+        bux_channel_close(ch.handle);
+    }
 
-func Channel_Free<T>(ch: *Channel<T>) {
-    bux_channel_free(ch.handle);
-}
+    func Channel_Free<T>(ch: *Channel<T>) {
+        bux_channel_free(ch.handle);
+    }
 
-func Channel_Drop<T>(ch: *Channel<T>) {
-    Channel_Free<T>(ch);
-}
+    func Channel_Drop<T>(ch: *Channel<T>) {
+        Channel_Free<T>(ch);
+    }
 
-/* Convenience wrappers for common types */
-func Channel_SendInt(ch: *Channel<int>, value: int) {
-    bux_channel_send(ch.handle, (&value) as *void);
-}
+    /* Convenience wrappers for common types */
+    func Channel_SendInt(ch: *Channel<int>, value: int) {
+        bux_channel_send(ch.handle, (&value) as *void);
+    }
 
-func Channel_RecvInt(ch: *Channel<int>) -> int {
-    var result: int = 0;
-    bux_channel_recv(ch.handle, (&result) as *void);
-    return result;
-}
+    func Channel_RecvInt(ch: *Channel<int>) -> int {
+        var result: int = 0;
+        bux_channel_recv(ch.handle, (&result) as *void);
+        return result;
+    }
 
-func Channel_SendFloat64(ch: *Channel<float64>, value: float64) {
-    bux_channel_send(ch.handle, (&value) as *void);
-}
+    func Channel_SendFloat64(ch: *Channel<float64>, value: float64) {
+        bux_channel_send(ch.handle, (&value) as *void);
+    }
 
-func Channel_RecvFloat64(ch: *Channel<float64>) -> float64 {
-    var result: float64 = 0.0;
-    bux_channel_recv(ch.handle, (&result) as *void);
-    return result;
-}
+    func Channel_RecvFloat64(ch: *Channel<float64>) -> float64 {
+        var result: float64 = 0.0;
+        bux_channel_recv(ch.handle, (&result) as *void);
+        return result;
+    }
 
 }

lib/Crypto.bux

@@ -10,72 +10,72 @@
 // =============================================================================
 module Std::Crypto {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len};
 
-// Re-use the same externs from submodules (merged by compiler)
-extern func bux_sha256(data: String, len: int, out: *void);
-extern func bux_hmac_sha256(key: String, keylen: int, msg: String, msglen: int, out: *void);
-extern func bux_random_bytes(buf: *void, len: int) -> int;
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
-extern func bux_bytes_to_hex(data: *void, len: int) -> String;
+    // Re-use the same externs from submodules (merged by compiler)
+    extern func bux_sha256(data: String, len: int, out: *void);
+    extern func bux_hmac_sha256(key: String, keylen: int, msg: String, msglen: int, out: *void);
+    extern func bux_random_bytes(buf: *void, len: int) -> int;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
+    extern func bux_bytes_to_hex(data: *void, len: int) -> String;
 
-// --- Legacy function names (delegate to new submodule functions) ---
+    // --- Legacy function names (delegate to new submodule functions) ---
 
-// SHA-256 → hex
-func Crypto_Sha256(data: String) -> String {
-    let len: int = String_Len(data) as int;
-    let hashBuf: *void = Alloc(32);
-    bux_sha256(data, len, hashBuf);
-    let result: String = bux_bytes_to_hex(hashBuf as *void, 32);
-    Free(hashBuf);
-    return result;
-}
-
-// HMAC-SHA256 → hex
-func Crypto_HmacSha256(key: String, message: String) -> String {
-    let keylen: int = String_Len(key) as int;
-    let msglen: int = String_Len(message) as int;
-    let hmacBuf: *void = Alloc(32);
-    bux_hmac_sha256(key, keylen, message, msglen, hmacBuf);
-    let result: String = bux_bytes_to_hex(hmacBuf as *void, 32);
-    Free(hmacBuf);
-    return result;
-}
-
-// Random bytes → base64
-func Crypto_RandomBytes(n: int) -> String {
-    if n <= 0 { return ""; }
-    let buf: *void = Alloc(n as uint);
-    if bux_random_bytes(buf, n) != 1 {
-        Free(buf);
-        return "";
+    // SHA-256 → hex
+    func Crypto_Sha256(data: String) -> String {
+        let len: int = String_Len(data) as int;
+        let hashBuf: *void = Alloc(32);
+        bux_sha256(data, len, hashBuf);
+        let result: String = bux_bytes_to_hex(hashBuf as *void, 32);
+        Free(hashBuf);
+        return result;
     }
-    let result: String = bux_base64_encode(buf as String, n);
-    Free(buf);
-    return result;
-}
 
-// Base64 encode
-func Crypto_Base64Encode(s: String) -> String {
-    return bux_base64_encode(s, String_Len(s) as int);
-}
+    // HMAC-SHA256 → hex
+    func Crypto_HmacSha256(key: String, message: String) -> String {
+        let keylen: int = String_Len(key) as int;
+        let msglen: int = String_Len(message) as int;
+        let hmacBuf: *void = Alloc(32);
+        bux_hmac_sha256(key, keylen, message, msglen, hmacBuf);
+        let result: String = bux_bytes_to_hex(hmacBuf as *void, 32);
+        Free(hmacBuf);
+        return result;
+    }
 
-// HMAC-SHA256 raw → base64
-func Crypto_HmacSha256Raw(key: String, message: String) -> String {
-    let keylen: int = String_Len(key) as int;
-    let msglen: int = String_Len(message) as int;
-    let hmacBuf: *void = Alloc(32);
-    bux_hmac_sha256(key, keylen, message, msglen, hmacBuf);
-    let result: String = bux_base64_encode(hmacBuf as String, 32);
-    Free(hmacBuf);
-    return result;
-}
+    // Random bytes → base64
+    func Crypto_RandomBytes(n: int) -> String {
+        if n <= 0 { return ""; }
+        let buf: *void = Alloc(n as uint);
+        if bux_random_bytes(buf, n) != 1 {
+            Free(buf);
+            return "";
+        }
+        let result: String = bux_base64_encode(buf as String, n);
+        Free(buf);
+        return result;
+    }
 
-// Base64 decode
-func Crypto_Base64Decode(s: String) -> String {
-    let outlen: int = 0;
-    return bux_base64_decode(s, String_Len(s) as int, &outlen);
-}
+    // Base64 encode
+    func Crypto_Base64Encode(s: String) -> String {
+        return bux_base64_encode(s, String_Len(s) as int);
+    }
+
+    // HMAC-SHA256 raw → base64
+    func Crypto_HmacSha256Raw(key: String, message: String) -> String {
+        let keylen: int = String_Len(key) as int;
+        let msglen: int = String_Len(message) as int;
+        let hmacBuf: *void = Alloc(32);
+        bux_hmac_sha256(key, keylen, message, msglen, hmacBuf);
+        let result: String = bux_base64_encode(hmacBuf as String, 32);
+        Free(hmacBuf);
+        return result;
+    }
+
+    // Base64 decode
+    func Crypto_Base64Decode(s: String) -> String {
+        let outlen: int = 0;
+        return bux_base64_decode(s, String_Len(s) as int, &outlen);
+    }
 }

lib/Fmt.bux

@@ -8,93 +8,93 @@
 
 module Std::Fmt {
 
-import Std::String::{
-    String_Eq,
-    String_FromInt,
-    String_FromFloat,
-    String_FromBool,
-    StringBuilder,
-    StringBuilder_New,
-    StringBuilder_Append,
-    StringBuilder_Build,
-    String_Chars
-};
+    import Std::String::{
+        String_Eq,
+        String_FromInt,
+        String_FromFloat,
+        String_FromBool,
+        StringBuilder,
+        StringBuilder_New,
+        StringBuilder_Append,
+        StringBuilder_Build,
+        String_Chars
+    };
 
-extern func bux_strlen(s: String) -> uint;
-extern func bux_str_to_int(s: String) -> int64;
-extern func bux_alloc(size: uint) -> *void;
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_str_to_int(s: String) -> int64;
+    extern func bux_alloc(size: uint) -> *void;
 
-// Core formatting engine: replace {0}..{9} in template with args
-func Fmt_Format(tmpl: String, argStrs: *String, argCount: int) -> String {
-    let sb: StringBuilder = StringBuilder_New();
-    var i: uint = 0;
-    let tmplLen: uint = bux_strlen(tmpl);
-    while i < tmplLen {
-        // Check for {
-        let ch: String = String_Chars(tmpl, i);
-        if String_Eq(ch, "{") {
-            let digitIdx: uint = i + 1;
-            if digitIdx < tmplLen {
-                let digitCh: String = String_Chars(tmpl, digitIdx);
-                let d: int64 = bux_str_to_int(digitCh);
-                if d >= 0 && d < argCount as int64 {
-                    // Consume {d}
-                    i = i + 2; // skip past digit
-                    // Check for closing }
-                    if i < tmplLen {
-                        let closeCh: String = String_Chars(tmpl, i);
-                        if String_Eq(closeCh, "}") {
-                            i = i + 1; // skip }
-                            let argStr: String = argStrs[d as uint];
-                            StringBuilder_Append(&sb, argStr);
-                            continue;
+    // Core formatting engine: replace {0}..{9} in template with args
+    func Fmt_Format(tmpl: String, argStrs: *String, argCount: int) -> String {
+        let sb: StringBuilder = StringBuilder_New();
+        var i: uint = 0;
+        let tmplLen: uint = bux_strlen(tmpl);
+        while i < tmplLen {
+            // Check for {
+            let ch: String = String_Chars(tmpl, i);
+            if String_Eq(ch, "{") {
+                let digitIdx: uint = i + 1;
+                if digitIdx < tmplLen {
+                    let digitCh: String = String_Chars(tmpl, digitIdx);
+                    let d: int64 = bux_str_to_int(digitCh);
+                    if d >= 0 && d < argCount as int64 {
+                        // Consume {d}
+                        i = i + 2; // skip past digit
+                        // Check for closing }
+                        if i < tmplLen {
+                            let closeCh: String = String_Chars(tmpl, i);
+                            if String_Eq(closeCh, "}") {
+                                i = i + 1; // skip }
+                                let argStr: String = argStrs[d as uint];
+                                StringBuilder_Append(&sb, argStr);
+                                continue;
+                            }
                         }
                     }
                 }
             }
+            // Normal character: append it
+            StringBuilder_Append(&sb, ch);
+            i = i + 1;
         }
-        // Normal character: append it
-        StringBuilder_Append(&sb, ch);
-        i = i + 1;
+        return StringBuilder_Build(&sb);
     }
-    return StringBuilder_Build(&sb);
-}
 
-// Convenience wrappers
-func Fmt_Fmt1(tmpl: String, a1: String) -> String {
-    var args: *String = bux_alloc(sizeof(String)) as *String;
-    args[0] = a1;
-    return Fmt_Format(tmpl, args, 1);
-}
+    // Convenience wrappers
+    func Fmt_Fmt1(tmpl: String, a1: String) -> String {
+        var args: *String = bux_alloc(sizeof(String)) as *String;
+        args[0] = a1;
+        return Fmt_Format(tmpl, args, 1);
+    }
 
-func Fmt_FmtInt(tmpl: String, val: int64) -> String {
-    let s: String = String_FromInt(val);
-    return Fmt_Fmt1(tmpl, s);
-}
+    func Fmt_FmtInt(tmpl: String, val: int64) -> String {
+        let s: String = String_FromInt(val);
+        return Fmt_Fmt1(tmpl, s);
+    }
 
-func Fmt_FmtBool(tmpl: String, val: bool) -> String {
-    let s: String = String_FromBool(val);
-    return Fmt_Fmt1(tmpl, s);
-}
+    func Fmt_FmtBool(tmpl: String, val: bool) -> String {
+        let s: String = String_FromBool(val);
+        return Fmt_Fmt1(tmpl, s);
+    }
 
-func Fmt_FmtFloat(tmpl: String, val: float64) -> String {
-    let s: String = String_FromFloat(val);
-    return Fmt_Fmt1(tmpl, s);
-}
+    func Fmt_FmtFloat(tmpl: String, val: float64) -> String {
+        let s: String = String_FromFloat(val);
+        return Fmt_Fmt1(tmpl, s);
+    }
 
-func Fmt_Fmt2(tmpl: String, a1: String, a2: String) -> String {
-    var args: *String = bux_alloc(2 * sizeof(String)) as *String;
-    args[0] = a1;
-    args[1] = a2;
-    return Fmt_Format(tmpl, args, 2);
-}
+    func Fmt_Fmt2(tmpl: String, a1: String, a2: String) -> String {
+        var args: *String = bux_alloc(2 * sizeof(String)) as *String;
+        args[0] = a1;
+        args[1] = a2;
+        return Fmt_Format(tmpl, args, 2);
+    }
 
-func Fmt_Fmt3(tmpl: String, a1: String, a2: String, a3: String) -> String {
-    var args: *String = bux_alloc(3 * sizeof(String)) as *String;
-    args[0] = a1;
-    args[1] = a2;
-    args[2] = a3;
-    return Fmt_Format(tmpl, args, 3);
-}
+    func Fmt_Fmt3(tmpl: String, a1: String, a2: String, a3: String) -> String {
+        var args: *String = bux_alloc(3 * sizeof(String)) as *String;
+        args[0] = a1;
+        args[1] = a2;
+        args[2] = a3;
+        return Fmt_Format(tmpl, args, 3);
+    }
 
 }

lib/Fs.bux

@@ -1,19 +1,19 @@
 module Std::Fs {
 
-extern func bux_dir_exists(path: String) -> int;
-extern func bux_mkdir_if_needed(path: String) -> int;
-extern func bux_list_dir(dir: String, ext: String, out_count: *int) -> *String;
+    extern func bux_dir_exists(path: String) -> int;
+    extern func bux_mkdir_if_needed(path: String) -> int;
+    extern func bux_list_dir(dir: String, ext: String, out_count: *int) -> *String;
 
-func DirExists(path: String) -> bool {
-    return bux_dir_exists(path) != 0;
-}
+    func DirExists(path: String) -> bool {
+        return bux_dir_exists(path) != 0;
+    }
 
-func Mkdir(path: String) -> bool {
-    return bux_mkdir_if_needed(path) != 0;
-}
+    func Mkdir(path: String) -> bool {
+        return bux_mkdir_if_needed(path) != 0;
+    }
 
-func ListDir(dir: String, ext: String, count: *int) -> *String {
-    return bux_list_dir(dir, ext, count);
-}
+    func ListDir(dir: String, ext: String, count: *int) -> *String {
+        return bux_list_dir(dir, ext, count);
+    }
 
 }

lib/Io.bux

@@ -1,28 +1,28 @@
 module Std::Io {
 
-extern func PrintLine(s: String);
-extern func Print(s: String);
-extern func PrintInt(n: int);
-extern func PrintInt64(n: int64);
-extern func PrintFloat(f: float64);
-extern func PrintBool(b: bool);
-extern func ReadLine() -> String;
-extern func bux_read_file(path: String) -> String;
-extern func bux_write_file(path: String, content: String) -> int;
-extern func bux_file_exists(path: String) -> int;
+    extern func PrintLine(s: String);
+    extern func Print(s: String);
+    extern func PrintInt(n: int);
+    extern func PrintInt64(n: int64);
+    extern func PrintFloat(f: float64);
+    extern func PrintBool(b: bool);
+    extern func ReadLine() -> String;
+    extern func bux_read_file(path: String) -> String;
+    extern func bux_write_file(path: String, content: String) -> int;
+    extern func bux_file_exists(path: String) -> int;
 
-func ReadFile(path: String) -> String {
-    return bux_read_file(path);
-}
+    func ReadFile(path: String) -> String {
+        return bux_read_file(path);
+    }
 
-func WriteFile(path: String, content: String) -> bool {
-    let r: int = bux_write_file(path, content);
-    return r != 0;
-}
+    func WriteFile(path: String, content: String) -> bool {
+        let r: int = bux_write_file(path, content);
+        return r != 0;
+    }
 
-func FileExists(path: String) -> bool {
-    let r: int = bux_file_exists(path);
-    return r != 0;
-}
+    func FileExists(path: String) -> bool {
+        let r: int = bux_file_exists(path);
+        return r != 0;
+    }
 
 }

lib/Iter.bux

@@ -1,233 +1,233 @@
 module Std::Iter {
 
-import Std::Array::*;
+    import Std::Array::*;
 
-struct Iter<T> {
-    data: *T,
-    len: uint,
-    pos: uint,
-}
-
-/* Create an iterator from an Array */
-func Array_Iter<T>(arr: *Array<T>) -> Iter<T> {
-    return Iter<T> { data: arr.data, len: arr.len, pos: 0 };
-}
-
-/* Check if there are more elements */
-func Iter_HasNext<T>(it: *Iter<T>) -> bool {
-    return it.pos < it.len;
-}
-
-/* Get the next element and advance (undefined if HasNext is false) */
-func Iter_Next<T>(it: *Iter<T>) -> T {
-    let val: T = it.data[it.pos];
-    it.pos = it.pos + 1;
-    return val;
-}
-
-/* Peek current element without advancing (undefined if HasNext is false) */
-func Iter_Peek<T>(it: *Iter<T>) -> T {
-    return it.data[it.pos];
-}
-
-/* Reset iterator to the beginning */
-func Iter_Reset<T>(it: *Iter<T>) {
-    it.pos = 0;
-}
-
-/* Current position */
-func Iter_Pos<T>(it: *Iter<T>) -> uint {
-    return it.pos;
-}
-
-/* Remaining length */
-func Iter_Len<T>(it: *Iter<T>) -> uint {
-    return it.len;
-}
-
-/* Count remaining elements */
-func Iter_Count<T>(it: *Iter<T>) -> uint {
-    return it.len - it.pos;
-}
-
-/* Skip N elements */
-func Iter_Skip<T>(it: *Iter<T>, n: uint) {
-    it.pos = it.pos + n;
-    if it.pos > it.len {
-        it.pos = it.len;
+    struct Iter<T> {
+        data: *T,
+        len: uint,
+        pos: uint,
     }
-}
 
-/* Take first N elements (by limiting len) */
-func Iter_Take<T>(it: *Iter<T>, n: uint) -> Iter<T> {
-    var endPos: uint = it.pos + n;
-    if endPos > it.len {
-        endPos = it.len;
+    /* Create an iterator from an Array */
+    func Array_Iter<T>(arr: *Array<T>) -> Iter<T> {
+        return Iter<T> { data: arr.data, len: arr.len, pos: 0 };
     }
-    return Iter<T> { data: it.data, len: endPos, pos: it.pos };
-}
 
-/* True if any remaining element equals value */
-func Iter_AnyEq<T>(it: *Iter<T>, value: T) -> bool {
-    var i: uint = it.pos;
-    while i < it.len {
-        if it.data[i] == value {
-            return true;
+    /* Check if there are more elements */
+    func Iter_HasNext<T>(it: *Iter<T>) -> bool {
+        return it.pos < it.len;
+    }
+
+    /* Get the next element and advance (undefined if HasNext is false) */
+    func Iter_Next<T>(it: *Iter<T>) -> T {
+        let val: T = it.data[it.pos];
+        it.pos = it.pos + 1;
+        return val;
+    }
+
+    /* Peek current element without advancing (undefined if HasNext is false) */
+    func Iter_Peek<T>(it: *Iter<T>) -> T {
+        return it.data[it.pos];
+    }
+
+    /* Reset iterator to the beginning */
+    func Iter_Reset<T>(it: *Iter<T>) {
+        it.pos = 0;
+    }
+
+    /* Current position */
+    func Iter_Pos<T>(it: *Iter<T>) -> uint {
+        return it.pos;
+    }
+
+    /* Remaining length */
+    func Iter_Len<T>(it: *Iter<T>) -> uint {
+        return it.len;
+    }
+
+    /* Count remaining elements */
+    func Iter_Count<T>(it: *Iter<T>) -> uint {
+        return it.len - it.pos;
+    }
+
+    /* Skip N elements */
+    func Iter_Skip<T>(it: *Iter<T>, n: uint) {
+        it.pos = it.pos + n;
+        if it.pos > it.len {
+            it.pos = it.len;
         }
-        i = i + 1;
     }
-    return false;
-}
 
-/* True if every remaining element equals value (true if empty) */
-func Iter_AllEq<T>(it: *Iter<T>, value: T) -> bool {
-    var i: uint = it.pos;
-    while i < it.len {
-        if it.data[i] != value {
-            return false;
+    /* Take first N elements (by limiting len) */
+    func Iter_Take<T>(it: *Iter<T>, n: uint) -> Iter<T> {
+        var endPos: uint = it.pos + n;
+        if endPos > it.len {
+            endPos = it.len;
         }
-        i = i + 1;
+        return Iter<T> { data: it.data, len: endPos, pos: it.pos };
     }
-    return true;
-}
 
-/* Collect remaining elements into a new Array */
-func Iter_Collect<T>(it: *Iter<T>) -> Array<T> {
-    let remaining: uint = it.len - it.pos;
-    var cap: uint = remaining;
-    if cap == 0 {
-        cap = 1;
-    }
-    var arr: Array<T> = Array_New<T>(cap);
-    var i: uint = it.pos;
-    while i < it.len {
-        Array_Push<T>(&arr, it.data[i]);
-        i = i + 1;
-    }
-    return arr;
-}
-
-// ---------------------------------------------------------------------------
-// Higher-order helpers (generic; fat func pointers / closures)
-// ---------------------------------------------------------------------------
-
-/* Map each remaining element through f: T → U, collect into Array<U> */
-func Iter_Map<T, U>(it: *Iter<T>, f: func(T) -> U) -> Array<U> {
-    let remaining: uint = it.len - it.pos;
-    var cap: uint = remaining;
-    if cap == 0 {
-        cap = 1;
-    }
-    var out: Array<U> = Array_New<U>(cap);
-    var i: uint = it.pos;
-    while i < it.len {
-        let mapped: U = f(it.data[i]);
-        Array_Push<U>(&out, mapped);
-        i = i + 1;
-    }
-    return out;
-}
-
-/* Keep remaining elements for which pred returns true */
-func Iter_Filter<T>(it: *Iter<T>, pred: func(T) -> bool) -> Array<T> {
-    let remaining: uint = it.len - it.pos;
-    var cap: uint = remaining;
-    if cap == 0 {
-        cap = 1;
-    }
-    var out: Array<T> = Array_New<T>(cap);
-    var i: uint = it.pos;
-    while i < it.len {
-        let v: T = it.data[i];
-        if pred(v) {
-            Array_Push<T>(&out, v);
+    /* True if any remaining element equals value */
+    func Iter_AnyEq<T>(it: *Iter<T>, value: T) -> bool {
+        var i: uint = it.pos;
+        while i < it.len {
+            if it.data[i] == value {
+                return true;
+            }
+            i = i + 1;
         }
-        i = i + 1;
+        return false;
     }
-    return out;
-}
 
-/* Left-fold: f(f(...f(init, x0), x1), ...) */
-func Iter_Fold<T, Acc>(it: *Iter<T>, init: Acc, f: func(Acc, T) -> Acc) -> Acc {
-    var acc: Acc = init;
-    var i: uint = it.pos;
-    while i < it.len {
-        acc = f(acc, it.data[i]);
-        i = i + 1;
-    }
-    return acc;
-}
-
-/* Call f for each remaining element (return value of f is ignored) */
-func Iter_ForEach<T>(it: *Iter<T>, f: func(T) -> int) {
-    var i: uint = it.pos;
-    while i < it.len {
-        let _ignored: int = f(it.data[i]);
-        i = i + 1;
-    }
-}
-
-/* True if any remaining element satisfies pred */
-func Iter_Any<T>(it: *Iter<T>, pred: func(T) -> bool) -> bool {
-    var i: uint = it.pos;
-    while i < it.len {
-        if pred(it.data[i]) {
-            return true;
+    /* True if every remaining element equals value (true if empty) */
+    func Iter_AllEq<T>(it: *Iter<T>, value: T) -> bool {
+        var i: uint = it.pos;
+        while i < it.len {
+            if it.data[i] != value {
+                return false;
+            }
+            i = i + 1;
         }
-        i = i + 1;
+        return true;
     }
-    return false;
-}
 
-/* True if all remaining elements satisfy pred (true if empty) */
-func Iter_All<T>(it: *Iter<T>, pred: func(T) -> bool) -> bool {
-    var i: uint = it.pos;
-    while i < it.len {
-        if !pred(it.data[i]) {
-            return false;
+    /* Collect remaining elements into a new Array */
+    func Iter_Collect<T>(it: *Iter<T>) -> Array<T> {
+        let remaining: uint = it.len - it.pos;
+        var cap: uint = remaining;
+        if cap == 0 {
+            cap = 1;
         }
-        i = i + 1;
+        var arr: Array<T> = Array_New<T>(cap);
+        var i: uint = it.pos;
+        while i < it.len {
+            Array_Push<T>(&arr, it.data[i]);
+            i = i + 1;
+        }
+        return arr;
     }
-    return true;
-}
 
-/* Sum remaining ints (specialized fold) */
-func Iter_SumInt(it: *Iter<int>) -> int {
-    var total: int = 0;
-    var i: uint = it.pos;
-    while i < it.len {
-        total = total + it.data[i];
-        i = i + 1;
+    // ---------------------------------------------------------------------------
+    // Higher-order helpers (generic; fat func pointers / closures)
+    // ---------------------------------------------------------------------------
+
+    /* Map each remaining element through f: T → U, collect into Array<U> */
+    func Iter_Map<T, U>(it: *Iter<T>, f: func(T) -> U) -> Array<U> {
+        let remaining: uint = it.len - it.pos;
+        var cap: uint = remaining;
+        if cap == 0 {
+            cap = 1;
+        }
+        var out: Array<U> = Array_New<U>(cap);
+        var i: uint = it.pos;
+        while i < it.len {
+            let mapped: U = f(it.data[i]);
+            Array_Push<U>(&out, mapped);
+            i = i + 1;
+        }
+        return out;
     }
-    return total;
-}
 
-// ---------------------------------------------------------------------------
-// Int-specialized aliases (backward compatible with earlier examples)
-// ---------------------------------------------------------------------------
+    /* Keep remaining elements for which pred returns true */
+    func Iter_Filter<T>(it: *Iter<T>, pred: func(T) -> bool) -> Array<T> {
+        let remaining: uint = it.len - it.pos;
+        var cap: uint = remaining;
+        if cap == 0 {
+            cap = 1;
+        }
+        var out: Array<T> = Array_New<T>(cap);
+        var i: uint = it.pos;
+        while i < it.len {
+            let v: T = it.data[i];
+            if pred(v) {
+                Array_Push<T>(&out, v);
+            }
+            i = i + 1;
+        }
+        return out;
+    }
 
-func Iter_MapInt(it: *Iter<int>, f: func(int) -> int) -> Array<int> {
-    return Iter_Map<int, int>(it, f);
-}
+    /* Left-fold: f(f(...f(init, x0), x1), ...) */
+    func Iter_Fold<T, Acc>(it: *Iter<T>, init: Acc, f: func(Acc, T) -> Acc) -> Acc {
+        var acc: Acc = init;
+        var i: uint = it.pos;
+        while i < it.len {
+            acc = f(acc, it.data[i]);
+            i = i + 1;
+        }
+        return acc;
+    }
 
-func Iter_FilterInt(it: *Iter<int>, pred: func(int) -> bool) -> Array<int> {
-    return Iter_Filter<int>(it, pred);
-}
+    /* Call f for each remaining element (return value of f is ignored) */
+    func Iter_ForEach<T>(it: *Iter<T>, f: func(T) -> int) {
+        var i: uint = it.pos;
+        while i < it.len {
+            let _ignored: int = f(it.data[i]);
+            i = i + 1;
+        }
+    }
 
-func Iter_FoldInt(it: *Iter<int>, init: int, f: func(int, int) -> int) -> int {
-    return Iter_Fold<int, int>(it, init, f);
-}
+    /* True if any remaining element satisfies pred */
+    func Iter_Any<T>(it: *Iter<T>, pred: func(T) -> bool) -> bool {
+        var i: uint = it.pos;
+        while i < it.len {
+            if pred(it.data[i]) {
+                return true;
+            }
+            i = i + 1;
+        }
+        return false;
+    }
 
-func Iter_ForEachInt(it: *Iter<int>, f: func(int) -> int) {
-    Iter_ForEach<int>(it, f);
-}
+    /* True if all remaining elements satisfy pred (true if empty) */
+    func Iter_All<T>(it: *Iter<T>, pred: func(T) -> bool) -> bool {
+        var i: uint = it.pos;
+        while i < it.len {
+            if !pred(it.data[i]) {
+                return false;
+            }
+            i = i + 1;
+        }
+        return true;
+    }
 
-func Iter_AnyInt(it: *Iter<int>, pred: func(int) -> bool) -> bool {
-    return Iter_Any<int>(it, pred);
-}
+    /* Sum remaining ints (specialized fold) */
+    func Iter_SumInt(it: *Iter<int>) -> int {
+        var total: int = 0;
+        var i: uint = it.pos;
+        while i < it.len {
+            total = total + it.data[i];
+            i = i + 1;
+        }
+        return total;
+    }
 
-func Iter_AllInt(it: *Iter<int>, pred: func(int) -> bool) -> bool {
-    return Iter_All<int>(it, pred);
-}
+    // ---------------------------------------------------------------------------
+    // Int-specialized aliases (backward compatible with earlier examples)
+    // ---------------------------------------------------------------------------
+
+    func Iter_MapInt(it: *Iter<int>, f: func(int) -> int) -> Array<int> {
+        return Iter_Map<int, int>(it, f);
+    }
+
+    func Iter_FilterInt(it: *Iter<int>, pred: func(int) -> bool) -> Array<int> {
+        return Iter_Filter<int>(it, pred);
+    }
+
+    func Iter_FoldInt(it: *Iter<int>, init: int, f: func(int, int) -> int) -> int {
+        return Iter_Fold<int, int>(it, init, f);
+    }
+
+    func Iter_ForEachInt(it: *Iter<int>, f: func(int) -> int) {
+        Iter_ForEach<int>(it, f);
+    }
+
+    func Iter_AnyInt(it: *Iter<int>, pred: func(int) -> bool) -> bool {
+        return Iter_Any<int>(it, pred);
+    }
+
+    func Iter_AllInt(it: *Iter<int>, pred: func(int) -> bool) -> bool {
+        return Iter_All<int>(it, pred);
+    }
 
 }

lib/Json.bux

@@ -1,297 +1,287 @@
 module Std::Json {
-import Std::Mem::{Alloc, Realloc, Free};
-import Std::String;
+    import Std::Mem::{Alloc, Realloc, Free};
+    import Std::String;
 
-/* === Tags === */
-const JsonTagNull: int = 0;
-const JsonTagBool: int = 1;
-const JsonTagNumber: int = 2;
-const JsonTagString: int = 3;
-const JsonTagArray: int = 4;
-const JsonTagObject: int = 5;
+    /* === Tags === */
+    const JsonTagNull: int = 0;
+    const JsonTagBool: int = 1;
+    const JsonTagNumber: int = 2;
+    const JsonTagString: int = 3;
+    const JsonTagArray: int = 4;
+    const JsonTagObject: int = 5;
 
-/* === Core type === */
-struct JsonValue {
-    tag: int,
-    boolVal: bool,
-    numVal: float64,
-    strVal: String,
-    arrData: *JsonValue,
-    arrLen: uint,
-    arrCap: uint,
-    objKeys: *String,
-    objValues: *JsonValue,
-    objLen: uint,
-    objCap: uint
-}
+    /* === Core type === */
+    struct JsonValue {
+        tag: int,
+        boolVal: bool,
+        numVal: float64,
+        strVal: String,
+        arrData: *JsonValue,
+        arrLen: uint,
+        arrCap: uint,
+        objKeys: *String,
+        objValues: *JsonValue,
+        objLen: uint,
+        objCap: uint
+    }
 
-/* === Constructors === */
-func Json_Null() -> JsonValue {
-    return JsonValue {
-        tag: JsonTagNull, boolVal: false, numVal: 0.0, strVal: "",
-        arrData: null, arrLen: 0, arrCap: 0,
-        objKeys: null, objValues: null, objLen: 0, objCap: 0
-    };
-}
+    /* === Constructors === */
+    func Json_Null() -> JsonValue {
+        return JsonValue {
+            tag: JsonTagNull, boolVal: false, numVal: 0.0, strVal: "",
+            arrData: null, arrLen: 0, arrCap: 0,
+            objKeys: null, objValues: null, objLen: 0, objCap: 0
+        };
+    }
 
-func Json_Bool(b: bool) -> JsonValue {
-    return JsonValue {
-        tag: JsonTagBool, boolVal: b, numVal: 0.0, strVal: "",
-        arrData: null, arrLen: 0, arrCap: 0,
-        objKeys: null, objValues: null, objLen: 0, objCap: 0
-    };
-}
+    func Json_Bool(b: bool) -> JsonValue {
+        return JsonValue {
+            tag: JsonTagBool, boolVal: b, numVal: 0.0, strVal: "",
+            arrData: null, arrLen: 0, arrCap: 0,
+            objKeys: null, objValues: null, objLen: 0, objCap: 0
+        };
+    }
 
-func Json_Number(n: float64) -> JsonValue {
-    return JsonValue {
-        tag: JsonTagNumber, boolVal: false, numVal: n, strVal: "",
-        arrData: null, arrLen: 0, arrCap: 0,
-        objKeys: null, objValues: null, objLen: 0, objCap: 0
-    };
-}
+    func Json_Number(n: float64) -> JsonValue {
+        return JsonValue {
+            tag: JsonTagNumber, boolVal: false, numVal: n, strVal: "",
+            arrData: null, arrLen: 0, arrCap: 0,
+            objKeys: null, objValues: null, objLen: 0, objCap: 0
+        };
+    }
 
-func Json_String(s: String) -> JsonValue {
-    return JsonValue {
-        tag: JsonTagString, boolVal: false, numVal: 0.0, strVal: s,
-        arrData: null, arrLen: 0, arrCap: 0,
-        objKeys: null, objValues: null, objLen: 0, objCap: 0
-    };
-}
+    func Json_String(s: String) -> JsonValue {
+        return JsonValue {
+            tag: JsonTagString, boolVal: false, numVal: 0.0, strVal: s,
+            arrData: null, arrLen: 0, arrCap: 0,
+            objKeys: null, objValues: null, objLen: 0, objCap: 0
+        };
+    }
 
-func Json_Array() -> JsonValue {
-    return JsonValue {
-        tag: JsonTagArray, boolVal: false, numVal: 0.0, strVal: "",
-        arrData: null, arrLen: 0, arrCap: 0,
-        objKeys: null, objValues: null, objLen: 0, objCap: 0
-    };
-}
+    func Json_Array() -> JsonValue {
+        return JsonValue {
+            tag: JsonTagArray, boolVal: false, numVal: 0.0, strVal: "",
+            arrData: null, arrLen: 0, arrCap: 0,
+            objKeys: null, objValues: null, objLen: 0, objCap: 0
+        };
+    }
 
-func Json_Object() -> JsonValue {
-    return JsonValue {
-        tag: JsonTagObject, boolVal: false, numVal: 0.0, strVal: "",
-        arrData: null, arrLen: 0, arrCap: 0,
-        objKeys: null, objValues: null, objLen: 0, objCap: 0
-    };
-}
+    func Json_Object() -> JsonValue {
+        return JsonValue {
+            tag: JsonTagObject, boolVal: false, numVal: 0.0, strVal: "",
+            arrData: null, arrLen: 0, arrCap: 0,
+            objKeys: null, objValues: null, objLen: 0, objCap: 0
+        };
+    }
 
-/* === Array helpers === */
-func Json_ArrayLen(v: JsonValue) -> uint {
-    if v.tag != JsonTagArray { return 0; }
-    return v.arrLen;
-}
+    /* === Array helpers === */
+    func Json_ArrayLen(v: JsonValue) -> uint {
+        if v.tag != JsonTagArray { return 0; }
+        return v.arrLen;
+    }
 
-func Json_ArrayGet(v: JsonValue, index: uint) -> JsonValue {
-    if v.tag != JsonTagArray { return Json_Null(); }
-    if index >= v.arrLen { return Json_Null(); }
-    return v.arrData[index];
-}
+    func Json_ArrayGet(v: JsonValue, index: uint) -> JsonValue {
+        if v.tag != JsonTagArray { return Json_Null(); }
+        if index >= v.arrLen { return Json_Null(); }
+        return v.arrData[index];
+    }
 
-func Json_ArrayPush(self: *JsonValue, val: JsonValue) {
-    if self.tag != JsonTagArray { return; }
-    if self.arrLen >= self.arrCap {
-        let arrNewCap: uint = self.arrCap;
-        if arrNewCap == 0 {
-            self.arrCap = 4;
-            self.arrData = Alloc(4 * sizeof(JsonValue)) as *JsonValue;
-        } else {
-            let doubleCap: uint = arrNewCap * 2;
-            self.arrCap = doubleCap;
-            self.arrData = Realloc(self.arrData as *void, doubleCap * sizeof(JsonValue)) as *JsonValue;
+    func Json_ArrayPush(self: *JsonValue, val: JsonValue) {
+        if self.tag != JsonTagArray { return; }
+        if self.arrLen >= self.arrCap {
+            let arrNewCap: uint = self.arrCap;
+            if arrNewCap == 0 {
+                self.arrCap = 4;
+                self.arrData = Alloc(4 * sizeof(JsonValue)) as *JsonValue;
+            } else {
+                let doubleCap: uint = arrNewCap * 2;
+                self.arrCap = doubleCap;
+                self.arrData = Realloc(self.arrData as *void, doubleCap * sizeof(JsonValue)) as *JsonValue;
+            }
         }
+        self.arrData[self.arrLen] = val;
+        self.arrLen = self.arrLen + 1;
     }
-    self.arrData[self.arrLen] = val;
-    self.arrLen = self.arrLen + 1;
-}
 
-/* === Object helpers === */
-func Json_ObjectLen(v: JsonValue) -> uint {
-    if v.tag != JsonTagObject { return 0; }
-    return v.objLen;
-}
+    /* === Object helpers === */
+    func Json_ObjectLen(v: JsonValue) -> uint {
+        if v.tag != JsonTagObject { return 0; }
+        return v.objLen;
+    }
 
-func Json_ObjectGet(v: JsonValue, key: String) -> JsonValue {
-    if v.tag != JsonTagObject { return Json_Null(); }
-    var i: uint = 0;
-    while i < v.objLen {
-        if String_Eq(v.objKeys[i], key) {
-            return v.objValues[i];
+    func Json_ObjectGet(v: JsonValue, key: String) -> JsonValue {
+        if v.tag != JsonTagObject { return Json_Null(); }
+        var i: uint = 0;
+        while i < v.objLen {
+            if String_Eq(v.objKeys[i], key) {
+                return v.objValues[i];
+            }
+            i = i + 1;
         }
-        i = i + 1;
+        return Json_Null();
     }
-    return Json_Null();
-}
 
-func Json_ObjectHas(v: JsonValue, key: String) -> bool {
-    if v.tag != JsonTagObject { return false; }
-    var i: uint = 0;
-    while i < v.objLen {
-        if String_Eq(v.objKeys[i], key) {
-            return true;
+    func Json_ObjectHas(v: JsonValue, key: String) -> bool {
+        if v.tag != JsonTagObject { return false; }
+        var i: uint = 0;
+        while i < v.objLen {
+            if String_Eq(v.objKeys[i], key) {
+                return true;
+            }
+            i = i + 1;
         }
-        i = i + 1;
+        return false;
     }
-    return false;
-}
 
-func Json_ObjectSet(self: *JsonValue, key: String, val: JsonValue) {
-    if self.tag != JsonTagObject { return; }
-    var i: uint = 0;
-    while i < self.objLen {
-        if String_Eq(self.objKeys[i], key) {
-            self.objValues[i] = val;
-            return;
+    func Json_ObjectSet(self: *JsonValue, key: String, val: JsonValue) {
+        if self.tag != JsonTagObject { return; }
+        var i: uint = 0;
+        while i < self.objLen {
+            if String_Eq(self.objKeys[i], key) {
+                self.objValues[i] = val;
+                return;
+            }
+            i = i + 1;
         }
-        i = i + 1;
-    }
-    if self.objLen >= self.objCap {
-        let objNewCap: uint = self.objCap;
-        if objNewCap == 0 {
-            self.objCap = 4;
-            self.objKeys = Alloc(4 * sizeof(String)) as *String;
-            self.objValues = Alloc(4 * sizeof(JsonValue)) as *JsonValue;
-        } else {
-            let doubleCap: uint = objNewCap * 2;
-            self.objCap = doubleCap;
-            self.objKeys = Realloc(self.objKeys as *void, doubleCap * sizeof(String)) as *String;
-            self.objValues = Realloc(self.objValues as *void, doubleCap * sizeof(JsonValue)) as *JsonValue;
+        if self.objLen >= self.objCap {
+            let objNewCap: uint = self.objCap;
+            if objNewCap == 0 {
+                self.objCap = 4;
+                self.objKeys = Alloc(4 * sizeof(String)) as *String;
+                self.objValues = Alloc(4 * sizeof(JsonValue)) as *JsonValue;
+            } else {
+                let doubleCap: uint = objNewCap * 2;
+                self.objCap = doubleCap;
+                self.objKeys = Realloc(self.objKeys as *void, doubleCap * sizeof(String)) as *String;
+                self.objValues = Realloc(self.objValues as *void, doubleCap * sizeof(JsonValue)) as *JsonValue;
+            }
         }
+        self.objKeys[self.objLen] = key;
+        self.objValues[self.objLen] = val;
+        self.objLen = self.objLen + 1;
     }
-    self.objKeys[self.objLen] = key;
-    self.objValues[self.objLen] = val;
-    self.objLen = self.objLen + 1;
-}
 
-/* === Accessors === */
-func Json_IsNull(v: JsonValue) -> bool {
-    return v.tag == JsonTagNull;
-}
-
-func Json_AsBool(v: JsonValue) -> bool {
-    if v.tag == JsonTagBool { return v.boolVal; }
-    return false;
-}
-
-func Json_AsNumber(v: JsonValue) -> float64 {
-    if v.tag == JsonTagNumber { return v.numVal; }
-    return 0.0;
-}
-
-func Json_AsString(v: JsonValue) -> String {
-    if v.tag == JsonTagString { return v.strVal; }
-    return "";
-}
-
-/* === Parser === */
-struct JsonParser {
-    src: String,
-    pos: uint,
-    len: uint,
-    error: String
-}
-
-func JsonParser_Peek(p: *JsonParser) -> int {
-    if p.pos >= p.len { return 0; }
-    return p.src[p.pos] as int;
-}
-
-func JsonParser_Advance(p: *JsonParser) {
-    if p.pos < p.len {
-        p.pos = p.pos + 1;
+    /* === Accessors === */
+    func Json_IsNull(v: JsonValue) -> bool {
+        return v.tag == JsonTagNull;
     }
-}
 
-func JsonParser_SkipWhitespace(p: *JsonParser) {
-    while true {
-        let c: int = JsonParser_Peek(p);
-        if c == 32 || c == 9 || c == 10 || c == 13 {
-            JsonParser_Advance(p);
-        } else {
-            return;
-        }
+    func Json_AsBool(v: JsonValue) -> bool {
+        if v.tag == JsonTagBool { return v.boolVal; }
+        return false;
     }
-}
 
-func JsonParser_Match(p: *JsonParser, expected: String) -> bool {
-    let elen: uint = String_Len(expected);
-    if p.pos + elen > p.len { return false; }
-    var i: uint = 0;
-    while i < elen {
-        if p.src[p.pos + i] != expected[i] {
-            return false;
-        }
-        i = i + 1;
+    func Json_AsNumber(v: JsonValue) -> float64 {
+        if v.tag == JsonTagNumber { return v.numVal; }
+        return 0.0;
     }
-    p.pos = p.pos + elen;
-    return true;
-}
 
-func JsonParser_ParseValue(p: *JsonParser) -> JsonValue;
-
-func JsonParser_ParseString(p: *JsonParser) -> String {
-    if JsonParser_Peek(p) != 34 {
-        p.error = "Expected string";
+    func Json_AsString(v: JsonValue) -> String {
+        if v.tag == JsonTagString { return v.strVal; }
         return "";
     }
-    JsonParser_Advance(p);
-    let sb: StringBuilder = StringBuilder_New();
-    while true {
-        let c: int = JsonParser_Peek(p);
-        if c == 0 || c == 34 {
-            break;
-        }
-        if c == 92 {
-            JsonParser_Advance(p);
-            let esc: int = JsonParser_Peek(p);
-            if esc == 0 {
-                p.error = "Unterminated string escape";
-                StringBuilder_Free(&sb);
-                return "";
-            }
-            if esc == 110 { StringBuilder_AppendChar(&sb, 10 as char8); }      // \n
-            else if esc == 116 { StringBuilder_AppendChar(&sb, 9 as char8); }  // \t
-            else if esc == 114 { StringBuilder_AppendChar(&sb, 13 as char8); } // \r
-            else if esc == 98 { StringBuilder_AppendChar(&sb, 8 as char8); }   // \b
-            else if esc == 102 { StringBuilder_AppendChar(&sb, 12 as char8); } // \f
-            else if esc == 34 { StringBuilder_AppendChar(&sb, 34 as char8); }  // \"
-            else if esc == 92 { StringBuilder_AppendChar(&sb, 92 as char8); }  // \\
-            else {
-                // Unknown escape — keep literal
-                StringBuilder_AppendChar(&sb, 92 as char8);
-                StringBuilder_AppendChar(&sb, esc as char8);
-            }
-            JsonParser_Advance(p);
-        } else {
-            StringBuilder_AppendChar(&sb, c as char8);
-            JsonParser_Advance(p);
+
+    /* === Parser === */
+    struct JsonParser {
+        src: String,
+        pos: uint,
+        len: uint,
+        error: String
+    }
+
+    func JsonParser_Peek(p: *JsonParser) -> int {
+        if p.pos >= p.len { return 0; }
+        return p.src[p.pos] as int;
+    }
+
+    func JsonParser_Advance(p: *JsonParser) {
+        if p.pos < p.len {
+            p.pos = p.pos + 1;
         }
     }
-    if JsonParser_Peek(p) != 34 {
-        p.error = "Unterminated string";
+
+    func JsonParser_SkipWhitespace(p: *JsonParser) {
+        while true {
+            let c: int = JsonParser_Peek(p);
+            if c == 32 || c == 9 || c == 10 || c == 13 {
+                JsonParser_Advance(p);
+            } else {
+                return;
+            }
+        }
+    }
+
+    func JsonParser_Match(p: *JsonParser, expected: String) -> bool {
+        let elen: uint = String_Len(expected);
+        if p.pos + elen > p.len { return false; }
+        var i: uint = 0;
+        while i < elen {
+            if p.src[p.pos + i] != expected[i] {
+                return false;
+            }
+            i = i + 1;
+        }
+        p.pos = p.pos + elen;
+        return true;
+    }
+
+    func JsonParser_ParseValue(p: *JsonParser) -> JsonValue;
+
+    func JsonParser_ParseString(p: *JsonParser) -> String {
+        if JsonParser_Peek(p) != 34 {
+            p.error = "Expected string";
+            return "";
+        }
+        JsonParser_Advance(p);
+        let sb: StringBuilder = StringBuilder_New();
+        while true {
+            let c: int = JsonParser_Peek(p);
+            if c == 0 || c == 34 {
+                break;
+            }
+            if c == 92 {
+                JsonParser_Advance(p);
+                let esc: int = JsonParser_Peek(p);
+                if esc == 0 {
+                    p.error = "Unterminated string escape";
+                    StringBuilder_Free(&sb);
+                    return "";
+                }
+                if esc == 110 { StringBuilder_AppendChar(&sb, 10 as char8); }      // \n
+                else if esc == 116 { StringBuilder_AppendChar(&sb, 9 as char8); }  // \t
+                else if esc == 114 { StringBuilder_AppendChar(&sb, 13 as char8); } // \r
+                else if esc == 98 { StringBuilder_AppendChar(&sb, 8 as char8); }   // \b
+                else if esc == 102 { StringBuilder_AppendChar(&sb, 12 as char8); } // \f
+                else if esc == 34 { StringBuilder_AppendChar(&sb, 34 as char8); }  // \"
+                else if esc == 92 { StringBuilder_AppendChar(&sb, 92 as char8); }  // \\
+                else {
+                    // Unknown escape — keep literal
+                    StringBuilder_AppendChar(&sb, 92 as char8);
+                    StringBuilder_AppendChar(&sb, esc as char8);
+                }
+                JsonParser_Advance(p);
+            } else {
+                StringBuilder_AppendChar(&sb, c as char8);
+                JsonParser_Advance(p);
+            }
+        }
+        if JsonParser_Peek(p) != 34 {
+            p.error = "Unterminated string";
+            StringBuilder_Free(&sb);
+            return "";
+        }
+        JsonParser_Advance(p);
+        let result: String = StringBuilder_Build(&sb);
         StringBuilder_Free(&sb);
-        return "";
+        return result;
     }
-    JsonParser_Advance(p);
-    let result: String = StringBuilder_Build(&sb);
-    StringBuilder_Free(&sb);
-    return result;
-}
 
-func JsonParser_ParseNumber(p: *JsonParser) -> JsonValue {
-    let start: uint = p.pos;
-    let c0: int = JsonParser_Peek(p);
-    if c0 == 45 {
-        JsonParser_Advance(p);
-    }
-    while true {
-        let c: int = JsonParser_Peek(p);
-        if c >= 48 && c <= 57 {
+    func JsonParser_ParseNumber(p: *JsonParser) -> JsonValue {
+        let start: uint = p.pos;
+        let c0: int = JsonParser_Peek(p);
+        if c0 == 45 {
             JsonParser_Advance(p);
-        } else {
-            break;
         }
-    }
-    if JsonParser_Peek(p) == 46 {
-        JsonParser_Advance(p);
         while true {
             let c: int = JsonParser_Peek(p);
             if c >= 48 && c <= 57 {
@@ -300,193 +290,203 @@ func JsonParser_ParseNumber(p: *JsonParser) -> JsonValue {
                 break;
             }
         }
+        if JsonParser_Peek(p) == 46 {
+            JsonParser_Advance(p);
+            while true {
+                let c: int = JsonParser_Peek(p);
+                if c >= 48 && c <= 57 {
+                    JsonParser_Advance(p);
+                } else {
+                    break;
+                }
+            }
+        }
+        let numStr: String = String_Slice(p.src, start, p.pos - start);
+        let n: float64 = String_ToFloat(numStr);
+        return Json_Number(n);
     }
-    let numStr: String = String_Slice(p.src, start, p.pos - start);
-    let n: float64 = String_ToFloat(numStr);
-    return Json_Number(n);
-}
 
-func JsonParser_ParseArray(p: *JsonParser) -> JsonValue {
-    JsonParser_Advance(p);
-    var arr: JsonValue = Json_Array();
-    JsonParser_SkipWhitespace(p);
-    if JsonParser_Peek(p) == 93 {
+    func JsonParser_ParseArray(p: *JsonParser) -> JsonValue {
         JsonParser_Advance(p);
-        return arr;
-    }
-    while true {
+        var arr: JsonValue = Json_Array();
         JsonParser_SkipWhitespace(p);
-        let val: JsonValue = JsonParser_ParseValue(p);
-        if p.error != "" { return Json_Null(); }
-        Json_ArrayPush(&arr, val);
-        JsonParser_SkipWhitespace(p);
-        let c: int = JsonParser_Peek(p);
-        if c == 93 {
+        if JsonParser_Peek(p) == 93 {
             JsonParser_Advance(p);
             return arr;
         }
-        if c == 44 {
-            JsonParser_Advance(p);
-        } else {
-            p.error = "Expected ',' or ']' in array";
-            return Json_Null();
+        while true {
+            JsonParser_SkipWhitespace(p);
+            let val: JsonValue = JsonParser_ParseValue(p);
+            if p.error != "" { return Json_Null(); }
+            Json_ArrayPush(&arr, val);
+            JsonParser_SkipWhitespace(p);
+            let c: int = JsonParser_Peek(p);
+            if c == 93 {
+                JsonParser_Advance(p);
+                return arr;
+            }
+            if c == 44 {
+                JsonParser_Advance(p);
+            } else {
+                p.error = "Expected ',' or ']' in array";
+                return Json_Null();
+            }
         }
     }
-}
 
-func JsonParser_ParseObject(p: *JsonParser) -> JsonValue {
-    JsonParser_Advance(p);
-    var obj: JsonValue = Json_Object();
-    JsonParser_SkipWhitespace(p);
-    if JsonParser_Peek(p) == 125 {
+    func JsonParser_ParseObject(p: *JsonParser) -> JsonValue {
         JsonParser_Advance(p);
-        return obj;
-    }
-    while true {
+        var obj: JsonValue = Json_Object();
         JsonParser_SkipWhitespace(p);
-        let key: String = JsonParser_ParseString(p);
-        if p.error != "" { return Json_Null(); }
-        JsonParser_SkipWhitespace(p);
-        if JsonParser_Peek(p) != 58 {
-            p.error = "Expected ':' after object key";
-            return Json_Null();
-        }
-        JsonParser_Advance(p);
-        JsonParser_SkipWhitespace(p);
-        let val: JsonValue = JsonParser_ParseValue(p);
-        if p.error != "" { return Json_Null(); }
-        Json_ObjectSet(&obj, key, val);
-        JsonParser_SkipWhitespace(p);
-        let c: int = JsonParser_Peek(p);
-        if c == 125 {
+        if JsonParser_Peek(p) == 125 {
             JsonParser_Advance(p);
             return obj;
         }
-        if c == 44 {
+        while true {
+            JsonParser_SkipWhitespace(p);
+            let key: String = JsonParser_ParseString(p);
+            if p.error != "" { return Json_Null(); }
+            JsonParser_SkipWhitespace(p);
+            if JsonParser_Peek(p) != 58 {
+                p.error = "Expected ':' after object key";
+                return Json_Null();
+            }
             JsonParser_Advance(p);
-        } else {
-            p.error = "Expected ',' or '}' in object";
+            JsonParser_SkipWhitespace(p);
+            let val: JsonValue = JsonParser_ParseValue(p);
+            if p.error != "" { return Json_Null(); }
+            Json_ObjectSet(&obj, key, val);
+            JsonParser_SkipWhitespace(p);
+            let c: int = JsonParser_Peek(p);
+            if c == 125 {
+                JsonParser_Advance(p);
+                return obj;
+            }
+            if c == 44 {
+                JsonParser_Advance(p);
+            } else {
+                p.error = "Expected ',' or '}' in object";
+                return Json_Null();
+            }
+        }
+    }
+
+    func JsonParser_ParseValue(p: *JsonParser) -> JsonValue {
+        JsonParser_SkipWhitespace(p);
+        let c: int = JsonParser_Peek(p);
+        if c == 0 {
+            p.error = "Unexpected end of input";
             return Json_Null();
         }
-    }
-}
-
-func JsonParser_ParseValue(p: *JsonParser) -> JsonValue {
-    JsonParser_SkipWhitespace(p);
-    let c: int = JsonParser_Peek(p);
-    if c == 0 {
-        p.error = "Unexpected end of input";
-        return Json_Null();
-    }
-    if c == 34 {
-        return Json_String(JsonParser_ParseString(p));
-    }
-    if c == 123 {
-        return JsonParser_ParseObject(p);
-    }
-    if c == 91 {
-        return JsonParser_ParseArray(p);
-    }
-    if c == 116 {
-        if JsonParser_Match(p, "true") {
-            return Json_Bool(true);
+        if c == 34 {
+            return Json_String(JsonParser_ParseString(p));
         }
-        p.error = "Expected 'true'";
-        return Json_Null();
-    }
-    if c == 102 {
-        if JsonParser_Match(p, "false") {
-            return Json_Bool(false);
+        if c == 123 {
+            return JsonParser_ParseObject(p);
         }
-        p.error = "Expected 'false'";
-        return Json_Null();
-    }
-    if c == 110 {
-        if JsonParser_Match(p, "null") {
+        if c == 91 {
+            return JsonParser_ParseArray(p);
+        }
+        if c == 116 {
+            if JsonParser_Match(p, "true") {
+                return Json_Bool(true);
+            }
+            p.error = "Expected 'true'";
             return Json_Null();
         }
-        p.error = "Expected 'null'";
+        if c == 102 {
+            if JsonParser_Match(p, "false") {
+                return Json_Bool(false);
+            }
+            p.error = "Expected 'false'";
+            return Json_Null();
+        }
+        if c == 110 {
+            if JsonParser_Match(p, "null") {
+                return Json_Null();
+            }
+            p.error = "Expected 'null'";
+            return Json_Null();
+        }
+        if (c >= 48 && c <= 57) || c == 45 {
+            return JsonParser_ParseNumber(p);
+        }
+        p.error = "Unexpected character";
         return Json_Null();
     }
-    if (c >= 48 && c <= 57) || c == 45 {
-        return JsonParser_ParseNumber(p);
-    }
-    p.error = "Unexpected character";
-    return Json_Null();
-}
 
-/* === Public parser === */
-func Json_Parse(s: String) -> JsonValue {
-    var p: JsonParser = JsonParser { src: s, pos: 0, len: String_Len(s), error: "" };
-    let result: JsonValue = JsonParser_ParseValue(&p);
-    JsonParser_SkipWhitespace(&p);
-    if p.error == "" && p.pos != p.len {
-        p.error = "Trailing data after JSON value";
-        return Json_Null();
-    }
-    return result;
-}
-
-/* === Serializer === */
-func Json_StringifyImpl(sb: *StringBuilder, v: JsonValue) {
-    if v.tag == JsonTagNull {
-        StringBuilder_Append(sb, "null");
-        return;
-    }
-    if v.tag == JsonTagBool {
-        if v.boolVal {
-            StringBuilder_Append(sb, "true");
-        } else {
-            StringBuilder_Append(sb, "false");
+    /* === Public parser === */
+    func Json_Parse(s: String) -> JsonValue {
+        var p: JsonParser = JsonParser { src: s, pos: 0, len: String_Len(s), error: "" };
+        let result: JsonValue = JsonParser_ParseValue(&p);
+        JsonParser_SkipWhitespace(&p);
+        if p.error == "" && p.pos != p.len {
+            p.error = "Trailing data after JSON value";
+            return Json_Null();
         }
-        return;
+        return result;
     }
-    if v.tag == JsonTagNumber {
-        StringBuilder_AppendFloat(sb, v.numVal);
-        return;
-    }
-    if v.tag == JsonTagString {
-        StringBuilder_AppendChar(sb, 34 as char8);
-        StringBuilder_Append(sb, v.strVal);
-        StringBuilder_AppendChar(sb, 34 as char8);
-        return;
-    }
-    if v.tag == JsonTagArray {
-        StringBuilder_AppendChar(sb, 91 as char8);
-        var i: uint = 0;
-        while i < v.arrLen {
-            if i > 0 {
-                StringBuilder_AppendChar(sb, 44 as char8);
+
+    /* === Serializer === */
+    func Json_StringifyImpl(sb: *StringBuilder, v: JsonValue) {
+        if v.tag == JsonTagNull {
+            StringBuilder_Append(sb, "null");
+            return;
+        }
+        if v.tag == JsonTagBool {
+            if v.boolVal {
+                StringBuilder_Append(sb, "true");
+            } else {
+                StringBuilder_Append(sb, "false");
             }
-            Json_StringifyImpl(sb, v.arrData[i]);
-            i = i + 1;
+            return;
         }
-        StringBuilder_AppendChar(sb, 93 as char8);
-        return;
-    }
-    if v.tag == JsonTagObject {
-        StringBuilder_AppendChar(sb, 123 as char8);
-        var i: uint = 0;
-        while i < v.objLen {
-            if i > 0 {
-                StringBuilder_AppendChar(sb, 44 as char8);
+        if v.tag == JsonTagNumber {
+            StringBuilder_AppendFloat(sb, v.numVal);
+            return;
+        }
+        if v.tag == JsonTagString {
+            StringBuilder_AppendChar(sb, 34 as char8);
+            StringBuilder_Append(sb, v.strVal);
+            StringBuilder_AppendChar(sb, 34 as char8);
+            return;
+        }
+        if v.tag == JsonTagArray {
+            StringBuilder_AppendChar(sb, 91 as char8);
+            var i: uint = 0;
+            while i < v.arrLen {
+                if i > 0 {
+                    StringBuilder_AppendChar(sb, 44 as char8);
+                }
+                Json_StringifyImpl(sb, v.arrData[i]);
+                i = i + 1;
             }
-            StringBuilder_AppendChar(sb, 34 as char8);
-            StringBuilder_Append(sb, v.objKeys[i]);
-            StringBuilder_AppendChar(sb, 34 as char8);
-            StringBuilder_AppendChar(sb, 58 as char8);
-            Json_StringifyImpl(sb, v.objValues[i]);
-            i = i + 1;
+            StringBuilder_AppendChar(sb, 93 as char8);
+            return;
+        }
+        if v.tag == JsonTagObject {
+            StringBuilder_AppendChar(sb, 123 as char8);
+            var i: uint = 0;
+            while i < v.objLen {
+                if i > 0 {
+                    StringBuilder_AppendChar(sb, 44 as char8);
+                }
+                StringBuilder_AppendChar(sb, 34 as char8);
+                StringBuilder_Append(sb, v.objKeys[i]);
+                StringBuilder_AppendChar(sb, 34 as char8);
+                StringBuilder_AppendChar(sb, 58 as char8);
+                Json_StringifyImpl(sb, v.objValues[i]);
+                i = i + 1;
+            }
+            StringBuilder_AppendChar(sb, 125 as char8);
+            return;
         }
-        StringBuilder_AppendChar(sb, 125 as char8);
-        return;
     }
-}
 
-func Json_Stringify(v: JsonValue) -> String {
-    let sb: StringBuilder = StringBuilder_New();
-    Json_StringifyImpl(&sb, v);
-    return StringBuilder_Build(&sb);
-}
+    func Json_Stringify(v: JsonValue) -> String {
+        let sb: StringBuilder = StringBuilder_New();
+        Json_StringifyImpl(&sb, v);
+        return StringBuilder_Build(&sb);
+    }
 
 }

lib/Map.bux

@@ -1,242 +1,250 @@
 module Std::Map {
 
-extern func bux_hash_bytes(ptr: *void, size: uint) -> uint;
-extern func bux_hash_string(s: String) -> uint;
+    extern func bux_hash_bytes(ptr: *void, size: uint) -> uint;
+    extern func bux_hash_string(s: String) -> uint;
 
-// ---------------------------------------------------------------------------
-// Generic Map<K, V> — works with value-type keys (int, float, etc.)
-// For String keys, use StringMap below.
-// ---------------------------------------------------------------------------
+    // ---------------------------------------------------------------------------
+    // Generic Map<K, V> — works with value-type keys (int, float, etc.)
+    // For String keys, use StringMap below.
+    // ---------------------------------------------------------------------------
 
-struct MapEntry<K, V> {
-    key: K,
-    value: V,
-    occupied: bool,
-}
-
-struct Map<K, V> {
-    entries: *MapEntry<K, V>,
-    cap: uint,
-    len: uint,
-}
-
-func Map_New<K, V>(cap: uint) -> Map<K, V> {
-    let total: uint = cap * sizeof(MapEntry<K, V>);
-    let data: *MapEntry<K, V> = bux_alloc(total) as *MapEntry<K, V>;
-    var i: uint = 0;
-    while i < cap {
-        data[i].occupied = false;
-        i = i + 1;
+    struct MapEntry<K, V> {
+        key: K,
+        value: V,
+        occupied: bool,
     }
-    return Map<K, V> { entries: data, cap: cap, len: 0 };
-}
 
-func Map_Set<K, V>(m: *Map<K, V>, key: K, value: V) {
-    var keyPtr: *K = &key;
-    let hash: uint = bux_hash_bytes(keyPtr as *void, sizeof(K));
-    var idx: uint = hash % m.cap;
-    while m.entries[idx].occupied {
-        if m.entries[idx].key == key {
-            m.entries[idx].value = value;
-            return;
+    struct Map<K, V> {
+        entries: *MapEntry<K, V>,
+        cap: uint,
+        len: uint,
+    }
+
+    func Map_New<K, V>(cap: uint) -> Map<K, V> {
+        let total: uint = cap * sizeof(MapEntry<K, V>);
+        let data: *MapEntry<K, V> = bux_alloc(total) as *MapEntry<K, V>;
+        var i: uint = 0;
+        while i < cap {
+            data[i].occupied = false;
+            i = i + 1;
         }
-        idx = (idx + 1) % m.cap;
+        return Map<K, V> { entries: data, cap: cap, len: 0 };
     }
-    m.entries[idx].key = key;
-    m.entries[idx].value = value;
-    m.entries[idx].occupied = true;
-    m.len = m.len + 1;
-}
 
-func Map_Get<K, V>(m: *Map<K, V>, key: K) -> V {
-    var keyPtr: *K = &key;
-    let hash: uint = bux_hash_bytes(keyPtr as *void, sizeof(K));
-    var idx: uint = hash % m.cap;
-    while m.entries[idx].occupied {
-        if m.entries[idx].key == key {
-            return m.entries[idx].value;
+    func Map_Set<K, V>(m: *Map<K, V>, key: K, value: V) {
+        var keyPtr: *K = &key;
+        let hash: uint = bux_hash_bytes(keyPtr as *void, sizeof(K));
+        var idx: uint = hash % m.cap;
+        while m.entries[idx].occupied {
+            if m.entries[idx].key == key {
+                m.entries[idx].value = value;
+                return;
+            }
+            idx = (idx + 1) % m.cap;
         }
-        idx = (idx + 1) % m.cap;
+        m.entries[idx].key = key;
+        m.entries[idx].value = value;
+        m.entries[idx].occupied = true;
+        m.len = m.len + 1;
     }
-    // Return zero value for missing key
-    var zero: V = 0 as V;
-    return zero;
-}
 
-func Map_Has<K, V>(m: *Map<K, V>, key: K) -> bool {
-    var keyPtr: *K = &key;
-    let hash: uint = bux_hash_bytes(keyPtr as *void, sizeof(K));
-    var idx: uint = hash % m.cap;
-    while m.entries[idx].occupied {
-        if m.entries[idx].key == key {
-            return true;
+    func Map_Get<K, V>(m: *Map<K, V>, key: K) -> V {
+        var keyPtr: *K = &key;
+        let hash: uint = bux_hash_bytes(keyPtr as *void, sizeof(K));
+        var idx: uint = hash % m.cap;
+        while m.entries[idx].occupied {
+            if m.entries[idx].key == key {
+                return m.entries[idx].value;
+            }
+            idx = (idx + 1) % m.cap;
         }
-        idx = (idx + 1) % m.cap;
+        // Return zero value for missing key
+        var zero: V = 0 as V;
+        return zero;
     }
-    return false;
-}
 
-func Map_Len<K, V>(m: *Map<K, V>) -> uint {
-    return m.len;
-}
-
-func Map_IsEmpty<K, V>(m: *Map<K, V>) -> bool {
-    return m.len == 0;
-}
-
-/* Remove key if present. Rebuilds the table to keep open-addressing correct. */
-func Map_Remove<K, V>(m: *Map<K, V>, key: K) -> bool {
-    if !Map_Has<K, V>(m, key) {
+    func Map_Has<K, V>(m: *Map<K, V>, key: K) -> bool {
+        var keyPtr: *K = &key;
+        let hash: uint = bux_hash_bytes(keyPtr as *void, sizeof(K));
+        var idx: uint = hash % m.cap;
+        while m.entries[idx].occupied {
+            if m.entries[idx].key == key {
+                return true;
+            }
+            idx = (idx + 1) % m.cap;
+        }
         return false;
     }
-    var fresh: Map<K, V> = Map_New<K, V>(m.cap);
-    var i: uint = 0;
-    while i < m.cap {
-        if m.entries[i].occupied {
-            if m.entries[i].key != key {
-                Map_Set<K, V>(&fresh, m.entries[i].key, m.entries[i].value);
+
+    func Map_Len<K, V>(m: *Map<K, V>) -> uint {
+        return m.len;
+    }
+
+    func Map_IsEmpty<K, V>(m: *Map<K, V>) -> bool {
+        return m.len == 0;
+    }
+
+    /* Remove key if present. Rebuilds the table to keep open-addressing correct. */
+    func Map_Remove<K, V>(m: *Map<K, V>, key: K) -> bool {
+        if !Map_Has<K, V>(m, key) {
+            return false;
+        }
+        var fresh: Map<K, V> = Map_New<K, V>(m.cap);
+        var i: uint = 0;
+        while i < m.cap {
+            if m.entries[i].occupied {
+                if m.entries[i].key != key {
+                    Map_Set<K, V>(&fresh, m.entries[i].key, m.entries[i].value);
+                }
             }
+            i = i + 1;
         }
-        i = i + 1;
+        bux_free(m.entries as *void);
+        m.entries = fresh.entries;
+        m.cap = fresh.cap;
+        m.len = fresh.len;
+        // Ownership transferred to `m` — clear `fresh` so auto-Drop does not free twice
+        fresh.entries = null as *MapEntry<K, V>;
+        fresh.cap = 0;
+        fresh.len = 0;
+        return true;
     }
-    bux_free(m.entries as *void);
-    m.entries = fresh.entries;
-    m.cap = fresh.cap;
-    m.len = fresh.len;
-    return true;
-}
 
-func Map_Clear<K, V>(m: *Map<K, V>) {
-    var i: uint = 0;
-    while i < m.cap {
-        m.entries[i].occupied = false;
-        i = i + 1;
-    }
-    m.len = 0;
-}
-
-func Map_Free<K, V>(m: *Map<K, V>) {
-    bux_free(m.entries as *void);
-    m.entries = null as *MapEntry<K, V>;
-    m.cap = 0;
-    m.len = 0;
-}
-
-func Map_Drop<K, V>(m: *Map<K, V>) {
-    Map_Free<K, V>(m);
-}
-
-// ---------------------------------------------------------------------------
-// StringMap<V> — specialized Map for String keys, using strcmp
-// ---------------------------------------------------------------------------
-
-struct StringMapEntry<V> {
-    key: String,
-    value: V,
-    occupied: bool,
-}
-
-struct StringMap<V> {
-    entries: *StringMapEntry<V>,
-    cap: uint,
-    len: uint,
-}
-
-func StringMap_New<V>(cap: uint) -> StringMap<V> {
-    let total: uint = cap * sizeof(StringMapEntry<V>);
-    let data: *StringMapEntry<V> = bux_alloc(total) as *StringMapEntry<V>;
-    var i: uint = 0;
-    while i < cap {
-        data[i].occupied = false;
-        i = i + 1;
-    }
-    return StringMap<V> { entries: data, cap: cap, len: 0 };
-}
-
-func StringMap_Set<V>(m: *StringMap<V>, key: String, value: V) {
-    let hash: uint = bux_hash_string(key);
-    var idx: uint = hash % m.cap;
-    while m.entries[idx].occupied {
-        if String_Eq(m.entries[idx].key, key) {
-            m.entries[idx].value = value;
-            return;
+    func Map_Clear<K, V>(m: *Map<K, V>) {
+        var i: uint = 0;
+        while i < m.cap {
+            m.entries[i].occupied = false;
+            i = i + 1;
         }
-        idx = (idx + 1) % m.cap;
+        m.len = 0;
     }
-    m.entries[idx].key = key;
-    m.entries[idx].value = value;
-    m.entries[idx].occupied = true;
-    m.len = m.len + 1;
-}
 
-func StringMap_Get<V>(m: *StringMap<V>, key: String) -> V {
-    let hash: uint = bux_hash_string(key);
-    var idx: uint = hash % m.cap;
-    while m.entries[idx].occupied {
-        if String_Eq(m.entries[idx].key, key) {
-            return m.entries[idx].value;
+    func Map_Free<K, V>(m: *Map<K, V>) {
+        bux_free(m.entries as *void);
+        m.entries = null as *MapEntry<K, V>;
+        m.cap = 0;
+        m.len = 0;
+    }
+
+    func Map_Drop<K, V>(m: *Map<K, V>) {
+        Map_Free<K, V>(m);
+    }
+
+    // ---------------------------------------------------------------------------
+    // StringMap<V> — specialized Map for String keys, using strcmp
+    // ---------------------------------------------------------------------------
+
+    struct StringMapEntry<V> {
+        key: String,
+        value: V,
+        occupied: bool,
+    }
+
+    struct StringMap<V> {
+        entries: *StringMapEntry<V>,
+        cap: uint,
+        len: uint,
+    }
+
+    func StringMap_New<V>(cap: uint) -> StringMap<V> {
+        let total: uint = cap * sizeof(StringMapEntry<V>);
+        let data: *StringMapEntry<V> = bux_alloc(total) as *StringMapEntry<V>;
+        var i: uint = 0;
+        while i < cap {
+            data[i].occupied = false;
+            i = i + 1;
         }
-        idx = (idx + 1) % m.cap;
+        return StringMap<V> { entries: data, cap: cap, len: 0 };
     }
-    var zero: V = 0 as V;
-    return zero;
-}
 
-func StringMap_Has<V>(m: *StringMap<V>, key: String) -> bool {
-    let hash: uint = bux_hash_string(key);
-    var idx: uint = hash % m.cap;
-    while m.entries[idx].occupied {
-        if String_Eq(m.entries[idx].key, key) {
-            return true;
+    func StringMap_Set<V>(m: *StringMap<V>, key: String, value: V) {
+        let hash: uint = bux_hash_string(key);
+        var idx: uint = hash % m.cap;
+        while m.entries[idx].occupied {
+            if String_Eq(m.entries[idx].key, key) {
+                m.entries[idx].value = value;
+                return;
+            }
+            idx = (idx + 1) % m.cap;
         }
-        idx = (idx + 1) % m.cap;
+        m.entries[idx].key = key;
+        m.entries[idx].value = value;
+        m.entries[idx].occupied = true;
+        m.len = m.len + 1;
     }
-    return false;
-}
 
-func StringMap_Len<V>(m: *StringMap<V>) -> uint {
-    return m.len;
-}
+    func StringMap_Get<V>(m: *StringMap<V>, key: String) -> V {
+        let hash: uint = bux_hash_string(key);
+        var idx: uint = hash % m.cap;
+        while m.entries[idx].occupied {
+            if String_Eq(m.entries[idx].key, key) {
+                return m.entries[idx].value;
+            }
+            idx = (idx + 1) % m.cap;
+        }
+        var zero: V = 0 as V;
+        return zero;
+    }
 
-func StringMap_IsEmpty<V>(m: *StringMap<V>) -> bool {
-    return m.len == 0;
-}
-
-func StringMap_Remove<V>(m: *StringMap<V>, key: String) -> bool {
-    if !StringMap_Has<V>(m, key) {
+    func StringMap_Has<V>(m: *StringMap<V>, key: String) -> bool {
+        let hash: uint = bux_hash_string(key);
+        var idx: uint = hash % m.cap;
+        while m.entries[idx].occupied {
+            if String_Eq(m.entries[idx].key, key) {
+                return true;
+            }
+            idx = (idx + 1) % m.cap;
+        }
         return false;
     }
-    var fresh: StringMap<V> = StringMap_New<V>(m.cap);
-    var i: uint = 0;
-    while i < m.cap {
-        if m.entries[i].occupied {
-            if !String_Eq(m.entries[i].key, key) {
-                StringMap_Set<V>(&fresh, m.entries[i].key, m.entries[i].value);
-            }
+
+    func StringMap_Len<V>(m: *StringMap<V>) -> uint {
+        return m.len;
+    }
+
+    func StringMap_IsEmpty<V>(m: *StringMap<V>) -> bool {
+        return m.len == 0;
+    }
+
+    func StringMap_Remove<V>(m: *StringMap<V>, key: String) -> bool {
+        if !StringMap_Has<V>(m, key) {
+            return false;
         }
-        i = i + 1;
+        var fresh: StringMap<V> = StringMap_New<V>(m.cap);
+        var i: uint = 0;
+        while i < m.cap {
+            if m.entries[i].occupied {
+                if !String_Eq(m.entries[i].key, key) {
+                    StringMap_Set<V>(&fresh, m.entries[i].key, m.entries[i].value);
+                }
+            }
+            i = i + 1;
+        }
+        bux_free(m.entries as *void);
+        m.entries = fresh.entries;
+        m.cap = fresh.cap;
+        m.len = fresh.len;
+        // Ownership transferred to `m` — clear `fresh` so auto-Drop does not free twice
+        fresh.entries = null as *StringMapEntry<V>;
+        fresh.cap = 0;
+        fresh.len = 0;
+        return true;
     }
-    bux_free(m.entries as *void);
-    m.entries = fresh.entries;
-    m.cap = fresh.cap;
-    m.len = fresh.len;
-    return true;
-}
 
-func StringMap_Clear<V>(m: *StringMap<V>) {
-    var i: uint = 0;
-    while i < m.cap {
-        m.entries[i].occupied = false;
-        i = i + 1;
+    func StringMap_Clear<V>(m: *StringMap<V>) {
+        var i: uint = 0;
+        while i < m.cap {
+            m.entries[i].occupied = false;
+            i = i + 1;
+        }
+        m.len = 0;
     }
-    m.len = 0;
-}
 
-func StringMap_Free<V>(m: *StringMap<V>) {
-    bux_free(m.entries as *void);
-    m.entries = null as *StringMapEntry<V>;
-    m.cap = 0;
-    m.len = 0;
-}
+    func StringMap_Free<V>(m: *StringMap<V>) {
+        bux_free(m.entries as *void);
+        m.entries = null as *StringMapEntry<V>;
+        m.cap = 0;
+        m.len = 0;
+    }
 
-}
+}

lib/Math.bux

@@ -1,44 +1,44 @@
 module Std::Math {
 
-extern func bux_sqrt(x: float64) -> float64;
-extern func bux_pow(x: float64, y: float64) -> float64;
-extern func bux_abs_i64(x: int64) -> int64;
-extern func bux_abs_f64(x: float64) -> float64;
-extern func bux_min_i64(a: int64, b: int64) -> int64;
-extern func bux_max_i64(a: int64, b: int64) -> int64;
-extern func bux_min_f64(a: float64, b: float64) -> float64;
-extern func bux_max_f64(a: float64, b: float64) -> float64;
+    extern func bux_sqrt(x: float64) -> float64;
+    extern func bux_pow(x: float64, y: float64) -> float64;
+    extern func bux_abs_i64(x: int64) -> int64;
+    extern func bux_abs_f64(x: float64) -> float64;
+    extern func bux_min_i64(a: int64, b: int64) -> int64;
+    extern func bux_max_i64(a: int64, b: int64) -> int64;
+    extern func bux_min_f64(a: float64, b: float64) -> float64;
+    extern func bux_max_f64(a: float64, b: float64) -> float64;
+
+    func Sqrt(x: float64) -> float64 {
+        return bux_sqrt(x);
+    }
+
+    func Pow(x: float64, y: float64) -> float64 {
+        return bux_pow(x, y);
+    }
+
+    func Abs(n: int64) -> int64 {
+        return bux_abs_i64(n);
+    }
+
+    func AbsF(f: float64) -> float64 {
+        return bux_abs_f64(f);
+    }
+
+    func Min(a: int64, b: int64) -> int64 {
+        return bux_min_i64(a, b);
+    }
+
+    func Max(a: int64, b: int64) -> int64 {
+        return bux_max_i64(a, b);
+    }
+
+    func MinF(a: float64, b: float64) -> float64 {
+        return bux_min_f64(a, b);
+    }
+
+    func MaxF(a: float64, b: float64) -> float64 {
+        return bux_max_f64(a, b);
+    }
 
-func Sqrt(x: float64) -> float64 {
-    return bux_sqrt(x);
 }
-
-func Pow(x: float64, y: float64) -> float64 {
-    return bux_pow(x, y);
-}
-
-func Abs(n: int64) -> int64 {
-    return bux_abs_i64(n);
-}
-
-func AbsF(f: float64) -> float64 {
-    return bux_abs_f64(f);
-}
-
-func Min(a: int64, b: int64) -> int64 {
-    return bux_min_i64(a, b);
-}
-
-func Max(a: int64, b: int64) -> int64 {
-    return bux_max_i64(a, b);
-}
-
-func MinF(a: float64, b: float64) -> float64 {
-    return bux_min_f64(a, b);
-}
-
-func MaxF(a: float64, b: float64) -> float64 {
-    return bux_max_f64(a, b);
-}
-
-}

lib/Mem.bux

@@ -1,29 +1,29 @@
 module Std::Mem {
 
-extern func bux_alloc(size: uint) -> *void;
-extern func bux_realloc(ptr: *void, size: uint) -> *void;
-extern func bux_free(ptr: *void);
-extern func bux_mem_eq(a: *void, b: *void, size: uint) -> int;
+    extern func bux_alloc(size: uint) -> *void;
+    extern func bux_realloc(ptr: *void, size: uint) -> *void;
+    extern func bux_free(ptr: *void);
+    extern func bux_mem_eq(a: *void, b: *void, size: uint) -> int;
 
-func Alloc(size: uint) -> *void {
-    return bux_alloc(size);
-}
+    func Alloc(size: uint) -> *void {
+        return bux_alloc(size);
+    }
 
-func Realloc(ptr: *void, size: uint) -> *void {
-    return bux_realloc(ptr, size);
-}
+    func Realloc(ptr: *void, size: uint) -> *void {
+        return bux_realloc(ptr, size);
+    }
 
-func Free(ptr: *void) {
-    bux_free(ptr);
-}
+    func Free(ptr: *void) {
+        bux_free(ptr);
+    }
 
-func MemEq(a: *void, b: *void, size: uint) -> bool {
-    return bux_mem_eq(a, b, size) != 0;
-}
+    func MemEq(a: *void, b: *void, size: uint) -> bool {
+        return bux_mem_eq(a, b, size) != 0;
+    }
 
-func New<T>() -> *T {
-    let sz: uint = sizeof(T);
-    return bux_alloc(sz) as *T;
-}
+    func New<T>() -> *T {
+        let sz: uint = sizeof(T);
+        return bux_alloc(sz) as *T;
+    }
 
 }

lib/Net.bux

@@ -1,62 +1,62 @@
 module Std::Net {
-extern func bux_socket_create() -> int;
-extern func bux_socket_reuse(fd: int) -> int;
-extern func bux_socket_bind(fd: int, addr: String, port: int) -> int;
-extern func bux_socket_listen(fd: int, backlog: int) -> int;
-extern func bux_socket_accept(fd: int) -> int;
-extern func bux_socket_connect(fd: int, addr: String, port: int) -> int;
-extern func bux_socket_send(fd: int, data: String, len: int) -> int;
-extern func bux_socket_recv(fd: int, maxLen: int) -> String;
-extern func bux_socket_close(fd: int) -> int;
-extern func bux_socket_error() -> String;
+    extern func bux_socket_create() -> int;
+    extern func bux_socket_reuse(fd: int) -> int;
+    extern func bux_socket_bind(fd: int, addr: String, port: int) -> int;
+    extern func bux_socket_listen(fd: int, backlog: int) -> int;
+    extern func bux_socket_accept(fd: int) -> int;
+    extern func bux_socket_connect(fd: int, addr: String, port: int) -> int;
+    extern func bux_socket_send(fd: int, data: String, len: int) -> int;
+    extern func bux_socket_recv(fd: int, maxLen: int) -> String;
+    extern func bux_socket_close(fd: int) -> int;
+    extern func bux_socket_error() -> String;
 
-/* Create a TCP socket. Returns -1 on error. */
-func Net_Create() -> int {
-    return bux_socket_create();
-}
+    /* Create a TCP socket. Returns -1 on error. */
+    func Net_Create() -> int {
+        return bux_socket_create();
+    }
 
-/* Enable SO_REUSEADDR on a socket. */
-func Net_SetReuse(fd: int) -> bool {
-    return bux_socket_reuse(fd) == 0;
-}
+    /* Enable SO_REUSEADDR on a socket. */
+    func Net_SetReuse(fd: int) -> bool {
+        return bux_socket_reuse(fd) == 0;
+    }
 
-/* Bind a socket to an address and port. */
-func Net_Bind(fd: int, addr: String, port: int) -> bool {
-    return bux_socket_bind(fd, addr, port) == 0;
-}
+    /* Bind a socket to an address and port. */
+    func Net_Bind(fd: int, addr: String, port: int) -> bool {
+        return bux_socket_bind(fd, addr, port) == 0;
+    }
 
-/* Start listening for connections. */
-func Net_Listen(fd: int, backlog: int) -> bool {
-    return bux_socket_listen(fd, backlog) == 0;
-}
+    /* Start listening for connections. */
+    func Net_Listen(fd: int, backlog: int) -> bool {
+        return bux_socket_listen(fd, backlog) == 0;
+    }
 
-/* Accept a connection. Returns new fd or -1 on error. */
-func Net_Accept(fd: int) -> int {
-    return bux_socket_accept(fd);
-}
+    /* Accept a connection. Returns new fd or -1 on error. */
+    func Net_Accept(fd: int) -> int {
+        return bux_socket_accept(fd);
+    }
 
-/* Connect to a remote address and port. */
-func Net_Connect(fd: int, addr: String, port: int) -> bool {
-    return bux_socket_connect(fd, addr, port) == 0;
-}
+    /* Connect to a remote address and port. */
+    func Net_Connect(fd: int, addr: String, port: int) -> bool {
+        return bux_socket_connect(fd, addr, port) == 0;
+    }
 
-/* Send data. Returns bytes sent or -1 on error. */
-func Net_Send(fd: int, data: String) -> int {
-    return bux_socket_send(fd, data, bux_strlen(data) as int);
-}
+    /* Send data. Returns bytes sent or -1 on error. */
+    func Net_Send(fd: int, data: String) -> int {
+        return bux_socket_send(fd, data, bux_strlen(data) as int);
+    }
 
-/* Receive up to maxLen bytes. Returns empty string on error/EOF. */
-func Net_Recv(fd: int, maxLen: int) -> String {
-    return bux_socket_recv(fd, maxLen);
-}
+    /* Receive up to maxLen bytes. Returns empty string on error/EOF. */
+    func Net_Recv(fd: int, maxLen: int) -> String {
+        return bux_socket_recv(fd, maxLen);
+    }
 
-/* Close a socket. */
-func Net_Close(fd: int) -> bool {
-    return bux_socket_close(fd) == 0;
-}
+    /* Close a socket. */
+    func Net_Close(fd: int) -> bool {
+        return bux_socket_close(fd) == 0;
+    }
 
-/* Get last socket error as a string. */
-func Net_LastError() -> String {
-    return bux_socket_error();
-}
+    /* Get last socket error as a string. */
+    func Net_LastError() -> String {
+        return bux_socket_error();
+    }
 }

lib/Option.bux

@@ -1,61 +1,61 @@
 module Std::Option {
-import Std::Io::{PrintLine};
+    import Std::Io::{PrintLine};
 
-extern func bux_exit(code: int);
+    extern func bux_exit(code: int);
 
-enum Option {
-    Some(int),
-    None,
-}
-
-func Option_NewSome(value: int) -> Option {
-    let o: Option = Option { tag: Option_Some };
-    o.data.Some_0 = value;
-    return o;
-}
-
-func Option_NewNone() -> Option {
-    return Option { tag: Option_None };
-}
-
-func Option_IsSome(o: Option) -> bool {
-    return o.tag == Option_Some;
-}
-
-func Option_IsNone(o: Option) -> bool {
-    return o.tag == Option_None;
-}
-
-func Option_Unwrap(o: Option) -> int {
-    if o.tag != Option_Some {
-        PrintLine("panic: unwrap on None");
-        return 0;
+    enum Option {
+        Some(int),
+        None,
     }
-    return o.data.Some_0;
-}
 
-func Option_UnwrapOr(o: Option, fallback: int) -> int {
-    if o.tag == Option_Some {
-        return o.data.Some_0;
-    }
-    return fallback;
-}
-
-/* Unwrap Some or panic with a custom message */
-func Option_Expect(o: Option, msg: String) -> int {
-    if o.tag != Option_Some {
-        PrintLine(msg);
-        bux_exit(1);
-    }
-    return o.data.Some_0;
-}
-
-/* If o is Some return it, otherwise return other */
-func Option_Or(o: Option, other: Option) -> Option {
-    if o.tag == Option_Some {
+    func Option_NewSome(value: int) -> Option {
+        let o: Option = Option { tag: Option_Some };
+        o.data.Some_0 = value;
         return o;
     }
-    return other;
-}
+
+    func Option_NewNone() -> Option {
+        return Option { tag: Option_None };
+    }
+
+    func Option_IsSome(o: Option) -> bool {
+        return o.tag == Option_Some;
+    }
+
+    func Option_IsNone(o: Option) -> bool {
+        return o.tag == Option_None;
+    }
+
+    func Option_Unwrap(o: Option) -> int {
+        if o.tag != Option_Some {
+            PrintLine("panic: unwrap on None");
+            return 0;
+        }
+        return o.data.Some_0;
+    }
+
+    func Option_UnwrapOr(o: Option, fallback: int) -> int {
+        if o.tag == Option_Some {
+            return o.data.Some_0;
+        }
+        return fallback;
+    }
+
+    /* Unwrap Some or panic with a custom message */
+    func Option_Expect(o: Option, msg: String) -> int {
+        if o.tag != Option_Some {
+            PrintLine(msg);
+            bux_exit(1);
+        }
+        return o.data.Some_0;
+    }
+
+    /* If o is Some return it, otherwise return other */
+    func Option_Or(o: Option, other: Option) -> Option {
+        if o.tag == Option_Some {
+            return o;
+        }
+        return other;
+    }
 
 }

lib/Os.bux

@@ -1,40 +1,40 @@
 module Std::Os {
 
-extern func bux_argc() -> int;
-extern func bux_argv(index: int) -> String;
-extern func bux_getenv(name: String) -> String;
-extern func bux_setenv(name: String, value: String) -> int;
-extern func bux_getcwd() -> String;
-extern func bux_chdir(path: String) -> int;
-extern func bux_exit(code: int);
+    extern func bux_argc() -> int;
+    extern func bux_argv(index: int) -> String;
+    extern func bux_getenv(name: String) -> String;
+    extern func bux_setenv(name: String, value: String) -> int;
+    extern func bux_getcwd() -> String;
+    extern func bux_chdir(path: String) -> int;
+    extern func bux_exit(code: int);
 
-func Os_ArgsCount() -> int {
-    return bux_argc();
-}
+    func Os_ArgsCount() -> int {
+        return bux_argc();
+    }
 
-func Os_Args(index: int) -> String {
-    return bux_argv(index);
-}
+    func Os_Args(index: int) -> String {
+        return bux_argv(index);
+    }
 
-func Os_GetEnv(name: String) -> String {
-    return bux_getenv(name);
-}
+    func Os_GetEnv(name: String) -> String {
+        return bux_getenv(name);
+    }
 
-func Os_SetEnv(name: String, value: String) -> bool {
-    return bux_setenv(name, value) == 0;
-}
+    func Os_SetEnv(name: String, value: String) -> bool {
+        return bux_setenv(name, value) == 0;
+    }
 
-func Os_GetCwd() -> String {
-    return bux_getcwd();
-}
+    func Os_GetCwd() -> String {
+        return bux_getcwd();
+    }
 
-func Os_Chdir(path: String) -> bool {
-    return bux_chdir(path) == 0;
-}
+    func Os_Chdir(path: String) -> bool {
+        return bux_chdir(path) == 0;
+    }
 
-/* Terminate the process with the given exit code */
-func Os_Exit(code: int) {
-    bux_exit(code);
-}
+    /* Terminate the process with the given exit code */
+    func Os_Exit(code: int) {
+        bux_exit(code);
+    }
 
 }

lib/Path.bux

@@ -1,19 +1,19 @@
 module Std::Path {
 
-extern func bux_path_join(a: String, b: String) -> String;
-extern func bux_path_parent(path: String) -> String;
-extern func bux_path_ext(path: String) -> String;
+    extern func bux_path_join(a: String, b: String) -> String;
+    extern func bux_path_parent(path: String) -> String;
+    extern func bux_path_ext(path: String) -> String;
+
+    func Path_Join(a: String, b: String) -> String {
+        return bux_path_join(a, b);
+    }
+
+    func Path_Parent(path: String) -> String {
+        return bux_path_parent(path);
+    }
+
+    func Path_Ext(path: String) -> String {
+        return bux_path_ext(path);
+    }
 
-func Path_Join(a: String, b: String) -> String {
-    return bux_path_join(a, b);
 }
-
-func Path_Parent(path: String) -> String {
-    return bux_path_parent(path);
-}
-
-func Path_Ext(path: String) -> String {
-    return bux_path_ext(path);
-}
-
-}

lib/Process.bux

@@ -1,14 +1,14 @@
 module Std::Process {
 
-extern func bux_process_run(cmd: String) -> int;
-extern func bux_process_output(cmd: String) -> String;
+    extern func bux_process_run(cmd: String) -> int;
+    extern func bux_process_output(cmd: String) -> String;
 
-func Process_Run(cmd: String) -> int {
-    return bux_process_run(cmd);
-}
+    func Process_Run(cmd: String) -> int {
+        return bux_process_run(cmd);
+    }
 
-func Process_Output(cmd: String) -> String {
-    return bux_process_output(cmd);
-}
+    func Process_Output(cmd: String) -> String {
+        return bux_process_output(cmd);
+    }
 
 }

lib/Result.bux

@@ -1,72 +1,72 @@
 module Std::Result {
-import Std::Io::{PrintLine};
+    import Std::Io::{PrintLine};
 
-extern func bux_exit(code: int);
+    extern func bux_exit(code: int);
 
-enum Result {
-    Ok(int),
-    Err(String),
-}
-
-func Result_NewOk(value: int) -> Result {
-    let r: Result = Result { tag: Result_Ok };
-    r.data.Ok_0 = value;
-    return r;
-}
-
-func Result_NewErr(msg: String) -> Result {
-    let r: Result = Result { tag: Result_Err };
-    r.data.Err_0 = msg;
-    return r;
-}
-
-func Result_IsOk(r: Result) -> bool {
-    return r.tag == Result_Ok;
-}
-
-func Result_IsErr(r: Result) -> bool {
-    return r.tag == Result_Err;
-}
-
-func Result_Unwrap(r: Result) -> int {
-    if r.tag != Result_Ok {
-        PrintLine("panic: unwrap on Err");
-        return 0;
+    enum Result {
+        Ok(int),
+        Err(String),
     }
-    return r.data.Ok_0;
-}
 
-func Result_UnwrapOr(r: Result, fallback: int) -> int {
-    if r.tag == Result_Ok {
-        return r.data.Ok_0;
-    }
-    return fallback;
-}
-
-/* Unwrap Ok or panic with a custom message */
-func Result_Expect(r: Result, msg: String) -> int {
-    if r.tag != Result_Ok {
-        PrintLine(msg);
-        bux_exit(1);
-    }
-    return r.data.Ok_0;
-}
-
-/* Extract Err payload (panics if Ok) */
-func Result_UnwrapErr(r: Result) -> String {
-    if r.tag != Result_Err {
-        PrintLine("panic: unwrap_err on Ok");
-        return "";
-    }
-    return r.data.Err_0;
-}
-
-/* If r is Ok return it, otherwise return other */
-func Result_Or(r: Result, other: Result) -> Result {
-    if r.tag == Result_Ok {
+    func Result_NewOk(value: int) -> Result {
+        let r: Result = Result { tag: Result_Ok };
+        r.data.Ok_0 = value;
         return r;
     }
-    return other;
-}
+
+    func Result_NewErr(msg: String) -> Result {
+        let r: Result = Result { tag: Result_Err };
+        r.data.Err_0 = msg;
+        return r;
+    }
+
+    func Result_IsOk(r: Result) -> bool {
+        return r.tag == Result_Ok;
+    }
+
+    func Result_IsErr(r: Result) -> bool {
+        return r.tag == Result_Err;
+    }
+
+    func Result_Unwrap(r: Result) -> int {
+        if r.tag != Result_Ok {
+            PrintLine("panic: unwrap on Err");
+            return 0;
+        }
+        return r.data.Ok_0;
+    }
+
+    func Result_UnwrapOr(r: Result, fallback: int) -> int {
+        if r.tag == Result_Ok {
+            return r.data.Ok_0;
+        }
+        return fallback;
+    }
+
+    /* Unwrap Ok or panic with a custom message */
+    func Result_Expect(r: Result, msg: String) -> int {
+        if r.tag != Result_Ok {
+            PrintLine(msg);
+            bux_exit(1);
+        }
+        return r.data.Ok_0;
+    }
+
+    /* Extract Err payload (panics if Ok) */
+    func Result_UnwrapErr(r: Result) -> String {
+        if r.tag != Result_Err {
+            PrintLine("panic: unwrap_err on Ok");
+            return "";
+        }
+        return r.data.Err_0;
+    }
+
+    /* If r is Ok return it, otherwise return other */
+    func Result_Or(r: Result, other: Result) -> Result {
+        if r.tag == Result_Ok {
+            return r;
+        }
+        return other;
+    }
 
 }

lib/Set.bux

@@ -1,112 +1,116 @@
 module Std::Set {
 
-extern func bux_hash_bytes(ptr: *void, size: uint) -> uint;
-extern func bux_mem_eq(a: *void, b: *void, size: uint) -> int;
-extern func bux_alloc(size: uint) -> *void;
-extern func bux_free(ptr: *void);
+    extern func bux_hash_bytes(ptr: *void, size: uint) -> uint;
+    extern func bux_mem_eq(a: *void, b: *void, size: uint) -> int;
+    extern func bux_alloc(size: uint) -> *void;
+    extern func bux_free(ptr: *void);
 
-struct SetEntry<T> {
-    value: T,
-    occupied: bool,
-}
-
-struct Set<T> {
-    entries: *SetEntry<T>,
-    cap: uint,
-    len: uint,
-}
-
-func Set_New<T>(cap: uint) -> Set<T> {
-    let total: uint = cap * sizeof(SetEntry<T>);
-    let data: *SetEntry<T> = bux_alloc(total) as *SetEntry<T>;
-    var i: uint = 0;
-    while i < cap {
-        data[i].occupied = false;
-        i = i + 1;
+    struct SetEntry<T> {
+        value: T,
+        occupied: bool,
     }
-    return Set<T> { entries: data, cap: cap, len: 0 };
-}
 
-func Set_Add<T>(s: *Set<T>, value: T) {
-    var valuePtr: *T = &value;
-    let hash: uint = bux_hash_bytes(valuePtr as *void, sizeof(T));
-    var idx: uint = hash % s.cap;
-    while s.entries[idx].occupied {
-        var entryPtr: *T = &s.entries[idx].value;
-        if bux_mem_eq(entryPtr as *void, valuePtr as *void, sizeof(T)) != 0 {
-            return;
+    struct Set<T> {
+        entries: *SetEntry<T>,
+        cap: uint,
+        len: uint,
+    }
+
+    func Set_New<T>(cap: uint) -> Set<T> {
+        let total: uint = cap * sizeof(SetEntry<T>);
+        let data: *SetEntry<T> = bux_alloc(total) as *SetEntry<T>;
+        var i: uint = 0;
+        while i < cap {
+            data[i].occupied = false;
+            i = i + 1;
         }
-        idx = (idx + 1) % s.cap;
+        return Set<T> { entries: data, cap: cap, len: 0 };
     }
-    s.entries[idx].value = value;
-    s.entries[idx].occupied = true;
-    s.len = s.len + 1;
-}
 
-func Set_Has<T>(s: *Set<T>, value: T) -> bool {
-    var valuePtr: *T = &value;
-    let hash: uint = bux_hash_bytes(valuePtr as *void, sizeof(T));
-    var idx: uint = hash % s.cap;
-    while s.entries[idx].occupied {
-        var entryPtr: *T = &s.entries[idx].value;
-        if bux_mem_eq(entryPtr as *void, valuePtr as *void, sizeof(T)) != 0 {
-            return true;
+    func Set_Add<T>(s: *Set<T>, value: T) {
+        var valuePtr: *T = &value;
+        let hash: uint = bux_hash_bytes(valuePtr as *void, sizeof(T));
+        var idx: uint = hash % s.cap;
+        while s.entries[idx].occupied {
+            var entryPtr: *T = &s.entries[idx].value;
+            if bux_mem_eq(entryPtr as *void, valuePtr as *void, sizeof(T)) != 0 {
+                return;
+            }
+            idx = (idx + 1) % s.cap;
         }
-        idx = (idx + 1) % s.cap;
+        s.entries[idx].value = value;
+        s.entries[idx].occupied = true;
+        s.len = s.len + 1;
     }
-    return false;
-}
 
-func Set_Len<T>(s: *Set<T>) -> uint {
-    return s.len;
-}
-
-func Set_IsEmpty<T>(s: *Set<T>) -> bool {
-    return s.len == 0;
-}
-
-/* Remove value if present. Rebuilds the table to keep open-addressing correct. */
-func Set_Remove<T>(s: *Set<T>, value: T) -> bool {
-    if !Set_Has<T>(s, value) {
+    func Set_Has<T>(s: *Set<T>, value: T) -> bool {
+        var valuePtr: *T = &value;
+        let hash: uint = bux_hash_bytes(valuePtr as *void, sizeof(T));
+        var idx: uint = hash % s.cap;
+        while s.entries[idx].occupied {
+            var entryPtr: *T = &s.entries[idx].value;
+            if bux_mem_eq(entryPtr as *void, valuePtr as *void, sizeof(T)) != 0 {
+                return true;
+            }
+            idx = (idx + 1) % s.cap;
+        }
         return false;
     }
-    var fresh: Set<T> = Set_New<T>(s.cap);
-    var i: uint = 0;
-    while i < s.cap {
-        if s.entries[i].occupied {
-            var entryPtr: *T = &s.entries[i].value;
-            var valuePtr: *T = &value;
-            if bux_mem_eq(entryPtr as *void, valuePtr as *void, sizeof(T)) == 0 {
-                Set_Add<T>(&fresh, s.entries[i].value);
-            }
+
+    func Set_Len<T>(s: *Set<T>) -> uint {
+        return s.len;
+    }
+
+    func Set_IsEmpty<T>(s: *Set<T>) -> bool {
+        return s.len == 0;
+    }
+
+    /* Remove value if present. Rebuilds the table to keep open-addressing correct. */
+    func Set_Remove<T>(s: *Set<T>, value: T) -> bool {
+        if !Set_Has<T>(s, value) {
+            return false;
         }
-        i = i + 1;
+        var fresh: Set<T> = Set_New<T>(s.cap);
+        var i: uint = 0;
+        while i < s.cap {
+            if s.entries[i].occupied {
+                var entryPtr: *T = &s.entries[i].value;
+                var valuePtr: *T = &value;
+                if bux_mem_eq(entryPtr as *void, valuePtr as *void, sizeof(T)) == 0 {
+                    Set_Add<T>(&fresh, s.entries[i].value);
+                }
+            }
+            i = i + 1;
+        }
+        bux_free(s.entries as *void);
+        s.entries = fresh.entries;
+        s.cap = fresh.cap;
+        s.len = fresh.len;
+        // Ownership transferred to `s` — clear `fresh` so auto-Drop does not free twice
+        fresh.entries = null as *SetEntry<T>;
+        fresh.cap = 0;
+        fresh.len = 0;
+        return true;
     }
-    bux_free(s.entries as *void);
-    s.entries = fresh.entries;
-    s.cap = fresh.cap;
-    s.len = fresh.len;
-    return true;
-}
 
-func Set_Clear<T>(s: *Set<T>) {
-    var i: uint = 0;
-    while i < s.cap {
-        s.entries[i].occupied = false;
-        i = i + 1;
+    func Set_Clear<T>(s: *Set<T>) {
+        var i: uint = 0;
+        while i < s.cap {
+            s.entries[i].occupied = false;
+            i = i + 1;
+        }
+        s.len = 0;
     }
-    s.len = 0;
-}
 
-func Set_Free<T>(s: *Set<T>) {
-    bux_free(s.entries as *void);
-    s.entries = null as *SetEntry<T>;
-    s.cap = 0;
-    s.len = 0;
-}
+    func Set_Free<T>(s: *Set<T>) {
+        bux_free(s.entries as *void);
+        s.entries = null as *SetEntry<T>;
+        s.cap = 0;
+        s.len = 0;
+    }
 
-func Set_Drop<T>(s: *Set<T>) {
-    Set_Free<T>(s);
-}
+    func Set_Drop<T>(s: *Set<T>) {
+        Set_Free<T>(s);
+    }
 
 }

lib/Slice.bux

@@ -1,39 +1,39 @@
 module Std::Slice {
 
-extern func bux_bounds_check(index: uint, len: uint);
+    extern func bux_bounds_check(index: uint, len: uint);
 
-struct Slice<T> {
-    data: *T,
-    len: uint,
-}
+    struct Slice<T> {
+        data: *T,
+        len: uint,
+    }
 
-func Slice_FromArray<T>(arr: *Array<T>) -> Slice<T> {
-    var s: Slice<T>;
-    s.data = arr.data;
-    s.len = arr.len;
-    return s;
-}
+    func Slice_FromArray<T>(arr: *Array<T>) -> Slice<T> {
+        var s: Slice<T>;
+        s.data = arr.data;
+        s.len = arr.len;
+        return s;
+    }
 
-func Slice_Get<T>(self: *Slice<T>, idx: uint) -> T {
-    bux_bounds_check(idx, self.len);
-    return self.data[idx];
-}
+    func Slice_Get<T>(self: *Slice<T>, idx: uint) -> T {
+        bux_bounds_check(idx, self.len);
+        return self.data[idx];
+    }
 
-func Slice_Set<T>(self: *Slice<T>, idx: uint, value: T) {
-    bux_bounds_check(idx, self.len);
-    self.data[idx] = value;
-}
+    func Slice_Set<T>(self: *Slice<T>, idx: uint, value: T) {
+        bux_bounds_check(idx, self.len);
+        self.data[idx] = value;
+    }
 
-func Slice_Len<T>(self: *Slice<T>) -> uint {
-    return self.len;
-}
+    func Slice_Len<T>(self: *Slice<T>) -> uint {
+        return self.len;
+    }
 
-func Slice_operator_index_get<T>(self: *Slice<T>, idx: uint) -> T {
-    return Slice_Get<T>(self, idx);
-}
+    func Slice_operator_index_get<T>(self: *Slice<T>, idx: uint) -> T {
+        return Slice_Get<T>(self, idx);
+    }
 
-func Slice_operator_index_set<T>(self: *Slice<T>, idx: uint, value: T) {
-    Slice_Set<T>(self, idx, value);
-}
+    func Slice_operator_index_set<T>(self: *Slice<T>, idx: uint, value: T) {
+        Slice_Set<T>(self, idx, value);
+    }
 
 }

lib/String.bux

@@ -1,288 +1,297 @@
 module Std::String {
 
-extern func bux_strlen(s: String) -> uint;
-extern func bux_strcmp(a: String, b: String) -> int;
-extern func bux_strncmp(a: String, b: String, n: uint) -> int;
-extern func bux_strcpy(dest: *char8, src: String) -> *char8;
-extern func bux_strcat(dest: *char8, src: String) -> *char8;
-extern func bux_strncpy(dest: *char8, src: String, n: uint) -> *char8;
-extern func bux_strstr(haystack: String, needle: String) -> String;
-extern func bux_str_contains(haystack: String, needle: String) -> int;
-extern func bux_str_offset(pos: String, base: String) -> uint;
-extern func bux_str_is_null(s: String) -> int;
-extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
-extern func bux_str_trim_left(s: String) -> String;
-extern func bux_str_trim_right(s: String) -> String;
-extern func bux_str_trim(s: String) -> String;
-extern func bux_int_to_str(n: int64) -> String;
-extern func bux_str_to_int(s: String) -> int64;
-extern func bux_sb_new(initial_cap: uint) -> *void;
-extern func bux_sb_append(sb: *void, s: String);
-extern func bux_sb_append_int(sb: *void, n: int64);
-extern func bux_sb_append_float(sb: *void, f: float64);
-extern func bux_sb_append_char(sb: *void, c: char8);
-extern func bux_sb_build(sb: *void) -> String;
-extern func bux_sb_free(sb: *void);
-extern func bux_str_split_count(s: String, delim: String) -> uint;
-extern func bux_str_split_part(s: String, delim: String, index: uint) -> String;
-extern func bux_str_join2(a: String, b: String, sep: String) -> String;
-extern func bux_float_to_string(f: float64) -> String;
-extern func bux_str_format(pattern: String, a0: String, a1: String, a2: String, a3: String, a4: String, a5: String, a6: String, a7: String) -> String;
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_strcmp(a: String, b: String) -> int;
+    extern func bux_strncmp(a: String, b: String, n: uint) -> int;
+    extern func bux_strcpy(dest: *char8, src: String) -> *char8;
+    extern func bux_strcat(dest: *char8, src: String) -> *char8;
+    extern func bux_strncpy(dest: *char8, src: String, n: uint) -> *char8;
+    extern func bux_strstr(haystack: String, needle: String) -> String;
+    extern func bux_str_contains(haystack: String, needle: String) -> int;
+    extern func bux_str_offset(pos: String, base: String) -> uint;
+    extern func bux_str_is_null(s: String) -> int;
+    extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
+    extern func bux_str_trim_left(s: String) -> String;
+    extern func bux_str_trim_right(s: String) -> String;
+    extern func bux_str_trim(s: String) -> String;
+    extern func bux_int_to_str(n: int64) -> String;
+    extern func bux_str_to_int(s: String) -> int64;
+    extern func bux_sb_new(initial_cap: uint) -> *void;
+    extern func bux_sb_append(sb: *void, s: String);
+    extern func bux_sb_append_int(sb: *void, n: int64);
+    extern func bux_sb_append_float(sb: *void, f: float64);
+    extern func bux_sb_append_char(sb: *void, c: char8);
+    extern func bux_sb_build(sb: *void) -> String;
+    extern func bux_sb_free(sb: *void);
+    extern func bux_str_split_count(s: String, delim: String) -> uint;
+    extern func bux_str_split_part(s: String, delim: String, index: uint) -> String;
+    extern func bux_str_join2(a: String, b: String, sep: String) -> String;
+    extern func bux_float_to_string(f: float64) -> String;
+    extern func bux_str_format(pattern: String, a0: String, a1: String, a2: String, a3: String, a4: String, a5: String, a6: String, a7: String) -> String;
 
 
-func String_Len(s: String) -> uint {
-    return bux_strlen(s);
-}
-
-func String_IsEmpty(s: String) -> bool {
-    return bux_strlen(s) == 0;
-}
-
-func String_IsNull(s: String) -> bool {
-    return bux_str_is_null(s) != 0;
-}
-
-func String_Eq(a: String, b: String) -> bool {
-    return bux_strcmp(a, b) == 0;
-}
-
-func String_Concat(a: String, b: String) -> String {
-    let len_a: uint = bux_strlen(a);
-    let len_b: uint = bux_strlen(b);
-    let total: uint = len_a + len_b + 1;
-    let buf: *char8 = bux_alloc(total) as *char8;
-    bux_strcpy(buf, a);
-    bux_strcat(buf, b);
-    return buf;
-}
-
-func String_Copy(s: String) -> String {
-    let len: uint = bux_strlen(s);
-    let buf: *char8 = bux_alloc(len + 1) as *char8;
-    bux_strcpy(buf, s);
-    return buf;
-}
-
-func String_StartsWith(s: String, prefix: String) -> bool {
-    let s_len: uint = bux_strlen(s);
-    let p_len: uint = bux_strlen(prefix);
-    if p_len > s_len {
-        return false;
+    /// Byte length of a C string (`strlen`).
+    func String_Len(s: String) -> uint {
+        return bux_strlen(s);
     }
-    let r: int = bux_strncmp(s, prefix, p_len);
-    return r == 0;
-}
 
-func String_EndsWith(s: String, suffix: String) -> bool {
-    let s_len: uint = bux_strlen(s);
-    let suf_len: uint = bux_strlen(suffix);
-    if suf_len > s_len {
-        return false;
+    /// True if the string has zero length.
+    func String_IsEmpty(s: String) -> bool {
+        return bux_strlen(s) == 0;
     }
-    let start: uint = s_len - suf_len;
-    let tail: String = bux_str_slice(s, start, suf_len);
-    let eq: bool = bux_strcmp(tail, suffix) == 0;
-    return eq;
-}
 
-func String_Contains(s: String, substr: String) -> bool {
-    let r: int = bux_str_contains(s, substr);
-    return r != 0;
-}
+    /// True if the pointer is null.
+    func String_IsNull(s: String) -> bool {
+        return bux_str_is_null(s) != 0;
+    }
 
-func String_Slice(s: String, start: uint, len: uint) -> String {
-    return bux_str_slice(s, start, len);
-}
+    /// Lexicographic equality.
+    func String_Eq(a: String, b: String) -> bool {
+        return bux_strcmp(a, b) == 0;
+    }
 
-func String_Trim(s: String) -> String {
-    return bux_str_trim(s);
-}
+    /// Allocate and return `a` concatenated with `b`.
+    func String_Concat(a: String, b: String) -> String {
+        let len_a: uint = bux_strlen(a);
+        let len_b: uint = bux_strlen(b);
+        let total: uint = len_a + len_b + 1;
+        let buf: *char8 = bux_alloc(total) as *char8;
+        bux_strcpy(buf, a);
+        bux_strcat(buf, b);
+        return buf;
+    }
 
-func String_TrimLeft(s: String) -> String {
-    return bux_str_trim_left(s);
-}
+    /// Heap-copy of `s`.
+    func String_Copy(s: String) -> String {
+        let len: uint = bux_strlen(s);
+        let buf: *char8 = bux_alloc(len + 1) as *char8;
+        bux_strcpy(buf, s);
+        return buf;
+    }
 
-func String_TrimRight(s: String) -> String {
-    return bux_str_trim_right(s);
-}
-
-func String_FromInt(n: int64) -> String {
-    return bux_int_to_str(n);
-}
-
-func String_ToInt(s: String) -> int64 {
-    return bux_str_to_int(s);
-}
-
-// String Builder — efficient string construction
-struct StringBuilder {
-    handle: *void,
-}
-
-func StringBuilder_New() -> StringBuilder {
-    return StringBuilder { handle: bux_sb_new(64) };
-}
-
-func StringBuilder_NewCap(cap: uint) -> StringBuilder {
-    return StringBuilder { handle: bux_sb_new(cap) };
-}
-
-func StringBuilder_Append(sb: *StringBuilder, s: String) {
-    bux_sb_append(sb.handle, s);
-}
-
-func StringBuilder_AppendInt(sb: *StringBuilder, n: int64) {
-    bux_sb_append_int(sb.handle, n);
-}
-
-func StringBuilder_AppendFloat(sb: *StringBuilder, f: float64) {
-    bux_sb_append_float(sb.handle, f);
-}
-
-func StringBuilder_AppendChar(sb: *StringBuilder, c: char8) {
-    bux_sb_append_char(sb.handle, c);
-}
-
-func StringBuilder_Build(sb: *StringBuilder) -> String {
-    return bux_sb_build(sb.handle);
-}
-
-func StringBuilder_Free(sb: *StringBuilder) {
-    bux_sb_free(sb.handle);
-}
-
-/* True if empty or only whitespace (space, tab, CR, LF) */
-func String_IsBlank(s: String) -> bool {
-    let n: uint = bux_strlen(s);
-    var i: uint = 0;
-    while i < n {
-        let ch: String = bux_str_slice(s, i, 1);
-        if !(String_Eq(ch, " ") || String_Eq(ch, "\t") || String_Eq(ch, "\n") || String_Eq(ch, "\r")) {
+    /// True if `s` begins with `prefix`.
+    func String_StartsWith(s: String, prefix: String) -> bool {
+        let s_len: uint = bux_strlen(s);
+        let p_len: uint = bux_strlen(prefix);
+        if p_len > s_len {
             return false;
         }
-        i = i + 1;
+        let r: int = bux_strncmp(s, prefix, p_len);
+        return r == 0;
     }
-    return true;
-}
 
-/* Repeat s, count times (count==0 → empty string) */
-func String_Repeat(s: String, count: uint) -> String {
-    if count == 0 {
-        return "";
-    }
-    if count == 1 {
-        return s;
-    }
-    var sb: StringBuilder = StringBuilder_New();
-    var i: uint = 0;
-    while i < count {
-        StringBuilder_Append(&sb, s);
-        i = i + 1;
-    }
-    let result: String = StringBuilder_Build(&sb);
-    StringBuilder_Free(&sb);
-    return result;
-}
-
-// ---------------------------------------------------------------------------
-// String split/join
-// ---------------------------------------------------------------------------
-
-func String_SplitCount(s: String, delim: String) -> uint {
-    return bux_str_split_count(s, delim);
-}
-
-func String_SplitPart(s: String, delim: String, index: uint) -> String {
-    return bux_str_split_part(s, delim, index);
-}
-
-func String_Join2(a: String, b: String, sep: String) -> String {
-    return bux_str_join2(a, b, sep);
-}
-
-// ---------------------------------------------------------------------------
-// String find/replace/format
-// ---------------------------------------------------------------------------
-
-// String_Chars — return single-character string at index (for iteration)
-func String_Chars(s: String, index: uint) -> String {
-    return bux_str_slice(s, index, 1);
-}
-
-func String_Find(haystack: String, needle: String) -> String {
-    return bux_strstr(haystack, needle);
-}
-
-func String_Offset(pos: String, base: String) -> uint {
-    return bux_str_offset(pos, base);
-}
-
-func String_Replace(s: String, old: String, new: String) -> String {
-    let pos: String = bux_strstr(s, old);
-    if String_IsNull(pos) {
-        return s;
-    }
-    let oldLen: uint = bux_strlen(old);
-    let prefixLen: uint = String_Offset(pos, s);
-    let prefix: String = bux_str_slice(s, 0, prefixLen);
-    let suffix: String = bux_str_slice(s, prefixLen + oldLen, bux_strlen(s) - prefixLen - oldLen);
-    let temp: String = String_Concat(prefix, new);
-    let result: String = String_Concat(temp, suffix);
-    return result;
-}
-
-/* Replace every non-overlapping occurrence of old with new.
-   Empty old is a no-op (returns s unchanged). Safe if new contains old. */
-func String_ReplaceAll(s: String, old: String, new: String) -> String {
-    let oldLen: uint = bux_strlen(old);
-    if oldLen == 0 {
-        return s;
-    }
-    var sb: StringBuilder = StringBuilder_New();
-    var remaining: String = s;
-    while true {
-        let pos: String = bux_strstr(remaining, old);
-        if String_IsNull(pos) {
-            StringBuilder_Append(&sb, remaining);
-            break;
+    /// True if `s` ends with `suffix`.
+    func String_EndsWith(s: String, suffix: String) -> bool {
+        let s_len: uint = bux_strlen(s);
+        let suf_len: uint = bux_strlen(suffix);
+        if suf_len > s_len {
+            return false;
         }
-        let prefixLen: uint = String_Offset(pos, remaining);
-        let prefix: String = bux_str_slice(remaining, 0, prefixLen);
-        StringBuilder_Append(&sb, prefix);
-        StringBuilder_Append(&sb, new);
-        let remLen: uint = bux_strlen(remaining);
-        remaining = bux_str_slice(remaining, prefixLen + oldLen, remLen - prefixLen - oldLen);
+        let start: uint = s_len - suf_len;
+        let tail: String = bux_str_slice(s, start, suf_len);
+        let eq: bool = bux_strcmp(tail, suffix) == 0;
+        return eq;
     }
-    let result: String = StringBuilder_Build(&sb);
-    StringBuilder_Free(&sb);
-    return result;
-}
 
-extern func bux_str_to_float(s: String) -> float64;
+    /// True if `substr` occurs anywhere in `s`.
+    func String_Contains(s: String, substr: String) -> bool {
+        let r: int = bux_str_contains(s, substr);
+        return r != 0;
+    }
 
-func String_ToFloat(s: String) -> float64 {
-    return bux_str_to_float(s);
-}
+    func String_Slice(s: String, start: uint, len: uint) -> String {
+        return bux_str_slice(s, start, len);
+    }
 
-func String_FromBool(b: bool) -> String {
-    if b { return "true"; }
-    return "false";
-}
+    func String_Trim(s: String) -> String {
+        return bux_str_trim(s);
+    }
 
-func String_FromFloat(f: float64) -> String {
-    return bux_float_to_string(f);
-}
+    func String_TrimLeft(s: String) -> String {
+        return bux_str_trim_left(s);
+    }
 
-func String_Format1(pattern: String, a0: String) -> String {
-    return bux_str_format(pattern, a0, "", "", "", "", "", "", "");
-}
+    func String_TrimRight(s: String) -> String {
+        return bux_str_trim_right(s);
+    }
 
-func String_Format2(pattern: String, a0: String, a1: String) -> String {
-    return bux_str_format(pattern, a0, a1, "", "", "", "", "", "");
-}
+    func String_FromInt(n: int64) -> String {
+        return bux_int_to_str(n);
+    }
 
-func String_Format3(pattern: String, a0: String, a1: String, a2: String) -> String {
-    return bux_str_format(pattern, a0, a1, a2, "", "", "", "", "");
-}
+    func String_ToInt(s: String) -> int64 {
+        return bux_str_to_int(s);
+    }
+
+    // String Builder — efficient string construction
+    struct StringBuilder {
+        handle: *void,
+    }
+
+    func StringBuilder_New() -> StringBuilder {
+        return StringBuilder { handle: bux_sb_new(64) };
+    }
+
+    func StringBuilder_NewCap(cap: uint) -> StringBuilder {
+        return StringBuilder { handle: bux_sb_new(cap) };
+    }
+
+    func StringBuilder_Append(sb: *StringBuilder, s: String) {
+        bux_sb_append(sb.handle, s);
+    }
+
+    func StringBuilder_AppendInt(sb: *StringBuilder, n: int64) {
+        bux_sb_append_int(sb.handle, n);
+    }
+
+    func StringBuilder_AppendFloat(sb: *StringBuilder, f: float64) {
+        bux_sb_append_float(sb.handle, f);
+    }
+
+    func StringBuilder_AppendChar(sb: *StringBuilder, c: char8) {
+        bux_sb_append_char(sb.handle, c);
+    }
+
+    func StringBuilder_Build(sb: *StringBuilder) -> String {
+        return bux_sb_build(sb.handle);
+    }
+
+    func StringBuilder_Free(sb: *StringBuilder) {
+        bux_sb_free(sb.handle);
+    }
+
+    /// True if empty or only whitespace (space, tab, CR, LF).
+    func String_IsBlank(s: String) -> bool {
+        let n: uint = bux_strlen(s);
+        var i: uint = 0;
+        while i < n {
+            let ch: String = bux_str_slice(s, i, 1);
+            if !(String_Eq(ch, " ") || String_Eq(ch, "\t") || String_Eq(ch, "\n") || String_Eq(ch, "\r")) {
+                return false;
+            }
+            i = i + 1;
+        }
+        return true;
+    }
+
+    /// Repeat `s`, `count` times (`count == 0` → empty string).
+    func String_Repeat(s: String, count: uint) -> String {
+        if count == 0 {
+            return "";
+        }
+        if count == 1 {
+            return s;
+        }
+        var sb: StringBuilder = StringBuilder_New();
+        var i: uint = 0;
+        while i < count {
+            StringBuilder_Append(&sb, s);
+            i = i + 1;
+        }
+        let result: String = StringBuilder_Build(&sb);
+        StringBuilder_Free(&sb);
+        return result;
+    }
+
+    // ---------------------------------------------------------------------------
+    // String split/join
+    // ---------------------------------------------------------------------------
+
+    func String_SplitCount(s: String, delim: String) -> uint {
+        return bux_str_split_count(s, delim);
+    }
+
+    func String_SplitPart(s: String, delim: String, index: uint) -> String {
+        return bux_str_split_part(s, delim, index);
+    }
+
+    func String_Join2(a: String, b: String, sep: String) -> String {
+        return bux_str_join2(a, b, sep);
+    }
+
+    // ---------------------------------------------------------------------------
+    // String find/replace/format
+    // ---------------------------------------------------------------------------
+
+    // String_Chars — return single-character string at index (for iteration)
+    func String_Chars(s: String, index: uint) -> String {
+        return bux_str_slice(s, index, 1);
+    }
+
+    func String_Find(haystack: String, needle: String) -> String {
+        return bux_strstr(haystack, needle);
+    }
+
+    func String_Offset(pos: String, base: String) -> uint {
+        return bux_str_offset(pos, base);
+    }
+
+    func String_Replace(s: String, old: String, new: String) -> String {
+        let pos: String = bux_strstr(s, old);
+        if String_IsNull(pos) {
+            return s;
+        }
+        let oldLen: uint = bux_strlen(old);
+        let prefixLen: uint = String_Offset(pos, s);
+        let prefix: String = bux_str_slice(s, 0, prefixLen);
+        let suffix: String = bux_str_slice(s, prefixLen + oldLen, bux_strlen(s) - prefixLen - oldLen);
+        let temp: String = String_Concat(prefix, new);
+        let result: String = String_Concat(temp, suffix);
+        return result;
+    }
+
+    /// Replace every non-overlapping occurrence of `old` with `new`.
+    /// Empty `old` is a no-op (returns `s` unchanged). Safe if `new` contains `old`.
+    func String_ReplaceAll(s: String, old: String, new: String) -> String {
+        let oldLen: uint = bux_strlen(old);
+        if oldLen == 0 {
+            return s;
+        }
+        var sb: StringBuilder = StringBuilder_New();
+        var remaining: String = s;
+        while true {
+            let pos: String = bux_strstr(remaining, old);
+            if String_IsNull(pos) {
+                StringBuilder_Append(&sb, remaining);
+                break;
+            }
+            let prefixLen: uint = String_Offset(pos, remaining);
+            let prefix: String = bux_str_slice(remaining, 0, prefixLen);
+            StringBuilder_Append(&sb, prefix);
+            StringBuilder_Append(&sb, new);
+            let remLen: uint = bux_strlen(remaining);
+            remaining = bux_str_slice(remaining, prefixLen + oldLen, remLen - prefixLen - oldLen);
+        }
+        let result: String = StringBuilder_Build(&sb);
+        StringBuilder_Free(&sb);
+        return result;
+    }
+
+    extern func bux_str_to_float(s: String) -> float64;
+
+    func String_ToFloat(s: String) -> float64 {
+        return bux_str_to_float(s);
+    }
+
+    func String_FromBool(b: bool) -> String {
+        if b { return "true"; }
+        return "false";
+    }
+
+    func String_FromFloat(f: float64) -> String {
+        return bux_float_to_string(f);
+    }
+
+    func String_Format1(pattern: String, a0: String) -> String {
+        return bux_str_format(pattern, a0, "", "", "", "", "", "", "");
+    }
+
+    func String_Format2(pattern: String, a0: String, a1: String) -> String {
+        return bux_str_format(pattern, a0, a1, "", "", "", "", "", "");
+    }
+
+    func String_Format3(pattern: String, a0: String, a1: String, a2: String) -> String {
+        return bux_str_format(pattern, a0, a1, a2, "", "", "", "", "");
+    }
 
 }

lib/Sync.bux

@@ -1,58 +1,58 @@
 module Std::Sync {
 
-extern func bux_mutex_new() -> *void;
-extern func bux_mutex_lock(handle: *void);
-extern func bux_mutex_unlock(handle: *void);
-extern func bux_mutex_free(handle: *void);
+    extern func bux_mutex_new() -> *void;
+    extern func bux_mutex_lock(handle: *void);
+    extern func bux_mutex_unlock(handle: *void);
+    extern func bux_mutex_free(handle: *void);
 
-extern func bux_rwlock_new() -> *void;
-extern func bux_rwlock_rdlock(handle: *void);
-extern func bux_rwlock_wrlock(handle: *void);
-extern func bux_rwlock_unlock(handle: *void);
-extern func bux_rwlock_free(handle: *void);
+    extern func bux_rwlock_new() -> *void;
+    extern func bux_rwlock_rdlock(handle: *void);
+    extern func bux_rwlock_wrlock(handle: *void);
+    extern func bux_rwlock_unlock(handle: *void);
+    extern func bux_rwlock_free(handle: *void);
 
-struct Mutex {
-    handle: *void;
-}
+    struct Mutex {
+        handle: *void;
+    }
 
-struct RwLock {
-    handle: *void;
-}
+    struct RwLock {
+        handle: *void;
+    }
 
-func Mutex_New() -> Mutex {
-    return Mutex { handle: bux_mutex_new() };
-}
+    func Mutex_New() -> Mutex {
+        return Mutex { handle: bux_mutex_new() };
+    }
 
-func Mutex_Lock(m: *Mutex) {
-    bux_mutex_lock(m.handle);
-}
+    func Mutex_Lock(m: *Mutex) {
+        bux_mutex_lock(m.handle);
+    }
 
-func Mutex_Unlock(m: *Mutex) {
-    bux_mutex_unlock(m.handle);
-}
+    func Mutex_Unlock(m: *Mutex) {
+        bux_mutex_unlock(m.handle);
+    }
 
-func Mutex_Free(m: *Mutex) {
-    bux_mutex_free(m.handle);
-}
+    func Mutex_Free(m: *Mutex) {
+        bux_mutex_free(m.handle);
+    }
 
-func RwLock_New() -> RwLock {
-    return RwLock { handle: bux_rwlock_new() };
-}
+    func RwLock_New() -> RwLock {
+        return RwLock { handle: bux_rwlock_new() };
+    }
 
-func RwLock_ReadLock(rw: *RwLock) {
-    bux_rwlock_rdlock(rw.handle);
-}
+    func RwLock_ReadLock(rw: *RwLock) {
+        bux_rwlock_rdlock(rw.handle);
+    }
 
-func RwLock_WriteLock(rw: *RwLock) {
-    bux_rwlock_wrlock(rw.handle);
-}
+    func RwLock_WriteLock(rw: *RwLock) {
+        bux_rwlock_wrlock(rw.handle);
+    }
 
-func RwLock_Unlock(rw: *RwLock) {
-    bux_rwlock_unlock(rw.handle);
-}
+    func RwLock_Unlock(rw: *RwLock) {
+        bux_rwlock_unlock(rw.handle);
+    }
 
-func RwLock_Free(rw: *RwLock) {
-    bux_rwlock_free(rw.handle);
-}
+    func RwLock_Free(rw: *RwLock) {
+        bux_rwlock_free(rw.handle);
+    }
 
 }

lib/Task.bux

@@ -1,43 +1,43 @@
 module Std::Task {
 
-extern func bux_task_init(num_workers: int);
-extern func bux_task_spawn(fn: *void, arg: *void) -> *void;
-extern func bux_task_join(handle: *void);
-extern func bux_task_sleep(ms: int64);
-extern func bux_task_yield();
-extern func bux_task_current_id() -> int;
-extern func bux_task_shutdown();
+    extern func bux_task_init(num_workers: int);
+    extern func bux_task_spawn(fn: *void, arg: *void) -> *void;
+    extern func bux_task_join(handle: *void);
+    extern func bux_task_sleep(ms: int64);
+    extern func bux_task_yield();
+    extern func bux_task_current_id() -> int;
+    extern func bux_task_shutdown();
 
-struct TaskHandle {
-    handle: *void;
-}
+    struct TaskHandle {
+        handle: *void;
+    }
 
-func Task_Init(num_workers: int) {
-    bux_task_init(num_workers);
-}
+    func Task_Init(num_workers: int) {
+        bux_task_init(num_workers);
+    }
 
-func Task_Spawn(fn: *void, arg: *void) -> TaskHandle {
-    return TaskHandle { handle: bux_task_spawn(fn, arg) };
-}
+    func Task_Spawn(fn: *void, arg: *void) -> TaskHandle {
+        return TaskHandle { handle: bux_task_spawn(fn, arg) };
+    }
 
-func Task_Wait(t: TaskHandle) {
-    bux_task_join(t.handle);
-}
+    func Task_Wait(t: TaskHandle) {
+        bux_task_join(t.handle);
+    }
 
-func Task_Sleep(ms: int64) {
-    bux_task_sleep(ms);
-}
+    func Task_Sleep(ms: int64) {
+        bux_task_sleep(ms);
+    }
 
-func Task_Yield() {
-    bux_task_yield();
-}
+    func Task_Yield() {
+        bux_task_yield();
+    }
 
-func Task_CurrentId() -> int {
-    return bux_task_current_id();
-}
+    func Task_CurrentId() -> int {
+        return bux_task_current_id();
+    }
 
-func Task_Shutdown() {
-    bux_task_shutdown();
-}
+    func Task_Shutdown() {
+        bux_task_shutdown();
+    }
 
 }

lib/Test.bux

@@ -1,76 +1,86 @@
 module Std::Test {
-import Std::Io::{PrintLine, PrintInt};
-import Std::String::{String_Eq};
+    import Std::Io::{PrintLine, PrintInt};
+    import Std::String::{String_Eq};
 
-extern func bux_exit(code: int);
-extern func bux_assert(cond: int, file: String, line: int, expr: String);
+    extern func bux_exit(code: int);
+    extern func bux_assert(cond: int, file: String, line: int, expr: String);
 
-func Test_Exit(code: int) {
-    bux_exit(code);
-}
+    /// Exit the process with `code` (for test runners).
+    func Test_Exit(code: int) {
+        bux_exit(code);
+    }
 
-func Test_Assert(cond: bool) {
-    bux_assert(cond as int, "", 0, "");
-}
+    /// Assert `cond` is true; abort on failure.
+    func Test_Assert(cond: bool) {
+        bux_assert(cond as int, "", 0, "");
+    }
 
-func Test_AssertEqInt(a: int, b: int) {
-    if a != b {
-        PrintLine("ASSERT_EQ_INT FAILED:");
-        PrintInt(a);
-        PrintLine(" != ");
-        PrintInt(b);
+    /// Assert two ints are equal; print both values and exit 1 on mismatch.
+    func Test_AssertEqInt(a: int, b: int) {
+        if a != b {
+            PrintLine("ASSERT_EQ_INT FAILED:");
+            PrintInt(a);
+            PrintLine(" != ");
+            PrintInt(b);
+            bux_exit(1);
+        }
+    }
+
+    /// Assert two ints differ.
+    func Test_AssertNeqInt(a: int, b: int) {
+        if a == b {
+            PrintLine("ASSERT_NEQ_INT FAILED: both are");
+            PrintInt(a);
+            bux_exit(1);
+        }
+    }
+
+    /// Assert two strings are equal (`String_Eq`).
+    func Test_AssertEqString(a: String, b: String) {
+        if !String_Eq(a, b) {
+            PrintLine("ASSERT_EQ_STRING FAILED:");
+            PrintLine(a);
+            PrintLine(" != ");
+            PrintLine(b);
+            bux_exit(1);
+        }
+    }
+
+    /// Assert two bools are equal.
+    func Test_AssertEqBool(a: bool, b: bool) {
+        if a != b {
+            PrintLine("ASSERT_EQ_BOOL FAILED");
+            bux_exit(1);
+        }
+    }
+
+    /// Assert `cond` is true.
+    func Test_AssertTrue(cond: bool) {
+        if !cond {
+            PrintLine("ASSERT_TRUE FAILED");
+            bux_exit(1);
+        }
+    }
+
+    /// Assert `cond` is false.
+    func Test_AssertFalse(cond: bool) {
+        if cond {
+            PrintLine("ASSERT_FALSE FAILED");
+            bux_exit(1);
+        }
+    }
+
+    /// Fail the test with a message and exit 1.
+    func Test_Fail(msg: String) {
+        PrintLine("FAIL:");
+        PrintLine(msg);
         bux_exit(1);
     }
-}
 
-func Test_AssertNeqInt(a: int, b: int) {
-    if a == b {
-        PrintLine("ASSERT_NEQ_INT FAILED: both are");
-        PrintInt(a);
-        bux_exit(1);
+    /// Print a PASS line (for human-readable runners / goldens).
+    func Test_Pass(msg: String) {
+        PrintLine("PASS:");
+        PrintLine(msg);
     }
-}
-
-func Test_AssertEqString(a: String, b: String) {
-    if !String_Eq(a, b) {
-        PrintLine("ASSERT_EQ_STRING FAILED:");
-        PrintLine(a);
-        PrintLine(" != ");
-        PrintLine(b);
-        bux_exit(1);
-    }
-}
-
-func Test_AssertEqBool(a: bool, b: bool) {
-    if a != b {
-        PrintLine("ASSERT_EQ_BOOL FAILED");
-        bux_exit(1);
-    }
-}
-
-func Test_AssertTrue(cond: bool) {
-    if !cond {
-        PrintLine("ASSERT_TRUE FAILED");
-        bux_exit(1);
-    }
-}
-
-func Test_AssertFalse(cond: bool) {
-    if cond {
-        PrintLine("ASSERT_FALSE FAILED");
-        bux_exit(1);
-    }
-}
-
-func Test_Fail(msg: String) {
-    PrintLine("FAIL:");
-    PrintLine(msg);
-    bux_exit(1);
-}
-
-func Test_Pass(msg: String) {
-    PrintLine("PASS:");
-    PrintLine(msg);
-}
 
 }

lib/Time.bux

@@ -1,19 +1,19 @@
 module Std::Time {
 
-extern func bux_time_ms() -> int64;
-extern func bux_time_us() -> int64;
-extern func bux_sleep_ms(ms: int64);
+    extern func bux_time_ms() -> int64;
+    extern func bux_time_us() -> int64;
+    extern func bux_sleep_ms(ms: int64);
 
-func Time_NowMs() -> int64 {
-    return bux_time_ms();
-}
+    func Time_NowMs() -> int64 {
+        return bux_time_ms();
+    }
 
-func Time_NowUs() -> int64 {
-    return bux_time_us();
-}
+    func Time_NowUs() -> int64 {
+        return bux_time_us();
+    }
 
-func Time_SleepMs(ms: int64) {
-    bux_sleep_ms(ms);
-}
+    func Time_SleepMs(ms: int64) {
+        bux_sleep_ms(ms);
+    }
 
 }

lib/crypto/aes.bux

@@ -3,65 +3,65 @@
 // =============================================================================
 module Std::Crypto::Aes {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len};
 
-extern func bux_random_bytes(buf: *void, len: int) -> int;
-extern func bux_aes_256_cbc_encrypt(plain: String, plainlen: int, key: String, iv: String, outlen: *int) -> String;
-extern func bux_aes_256_cbc_decrypt(cipher: String, cipherlen: int, key: String, iv: String, outlen: *int) -> String;
-extern func bux_aes_256_gcm_encrypt(plain: String, plainlen: int, key: String, iv: String, tag: *void, outlen: *int) -> String;
-extern func bux_aes_256_gcm_decrypt(cipher: String, cipherlen: int, key: String, iv: String, tag: String, outlen: *int) -> String;
+    extern func bux_random_bytes(buf: *void, len: int) -> int;
+    extern func bux_aes_256_cbc_encrypt(plain: String, plainlen: int, key: String, iv: String, outlen: *int) -> String;
+    extern func bux_aes_256_cbc_decrypt(cipher: String, cipherlen: int, key: String, iv: String, outlen: *int) -> String;
+    extern func bux_aes_256_gcm_encrypt(plain: String, plainlen: int, key: String, iv: String, tag: *void, outlen: *int) -> String;
+    extern func bux_aes_256_gcm_decrypt(cipher: String, cipherlen: int, key: String, iv: String, tag: String, outlen: *int) -> String;
 
-// --- AES-256-CBC ---
+    // --- AES-256-CBC ---
 
-const AES_KEY_SIZE: int = 32;  // 256 bits
-const AES_IV_SIZE: int  = 16;  // 128 bits
-const AES_GCM_TAG_SIZE: int = 16;
+    const AES_KEY_SIZE: int = 32;  // 256 bits
+    const AES_IV_SIZE: int  = 16;  // 128 bits
+    const AES_GCM_TAG_SIZE: int = 16;
 
-// Generate a random 256-bit AES key (returns raw 32 bytes)
-func Aes_GenerateKey() -> String {
-    let buf: *void = Alloc(AES_KEY_SIZE as uint);
-    if bux_random_bytes(buf, AES_KEY_SIZE) != 1 {
-        Free(buf);
-        return "";
+    // Generate a random 256-bit AES key (returns raw 32 bytes)
+    func Aes_GenerateKey() -> String {
+        let buf: *void = Alloc(AES_KEY_SIZE as uint);
+        if bux_random_bytes(buf, AES_KEY_SIZE) != 1 {
+            Free(buf);
+            return "";
+        }
+        return buf as String;
     }
-    return buf as String;
-}
 
-// Generate a random 128-bit IV (returns raw 16 bytes)
-func Aes_GenerateIV() -> String {
-    let buf: *void = Alloc(AES_IV_SIZE as uint);
-    if bux_random_bytes(buf, AES_IV_SIZE) != 1 {
-        Free(buf);
-        return "";
+    // Generate a random 128-bit IV (returns raw 16 bytes)
+    func Aes_GenerateIV() -> String {
+        let buf: *void = Alloc(AES_IV_SIZE as uint);
+        if bux_random_bytes(buf, AES_IV_SIZE) != 1 {
+            Free(buf);
+            return "";
+        }
+        return buf as String;
     }
-    return buf as String;
-}
 
-// AES-256-CBC encrypt. plain and key are binary strings, iv is 16 bytes.
-// Returns ciphertext (may be longer than plain due to PKCS#7 padding).
-func Aes_CbcEncrypt(plain: String, key: String, iv: String) -> String {
-    let outlen: int = 0;
-    return bux_aes_256_cbc_encrypt(plain, String_Len(plain) as int, key, iv, &outlen);
-}
+    // AES-256-CBC encrypt. plain and key are binary strings, iv is 16 bytes.
+    // Returns ciphertext (may be longer than plain due to PKCS#7 padding).
+    func Aes_CbcEncrypt(plain: String, key: String, iv: String) -> String {
+        let outlen: int = 0;
+        return bux_aes_256_cbc_encrypt(plain, String_Len(plain) as int, key, iv, &outlen);
+    }
 
-// AES-256-CBC decrypt. Returns plaintext.
-func Aes_CbcDecrypt(cipher: String, key: String, iv: String) -> String {
-    let outlen: int = 0;
-    return bux_aes_256_cbc_decrypt(cipher, String_Len(cipher) as int, key, iv, &outlen);
-}
+    // AES-256-CBC decrypt. Returns plaintext.
+    func Aes_CbcDecrypt(cipher: String, key: String, iv: String) -> String {
+        let outlen: int = 0;
+        return bux_aes_256_cbc_decrypt(cipher, String_Len(cipher) as int, key, iv, &outlen);
+    }
 
-// --- AES-256-GCM (Authenticated Encryption) ---
+    // --- AES-256-GCM (Authenticated Encryption) ---
 
-// AES-256-GCM encrypt. Returns ciphertext. tag receives 16-byte authentication tag.
-func Aes_GcmEncrypt(plain: String, key: String, iv: String, tag: *void) -> String {
-    let outlen: int = 0;
-    return bux_aes_256_gcm_encrypt(plain, String_Len(plain) as int, key, iv, tag, &outlen);
-}
+    // AES-256-GCM encrypt. Returns ciphertext. tag receives 16-byte authentication tag.
+    func Aes_GcmEncrypt(plain: String, key: String, iv: String, tag: *void) -> String {
+        let outlen: int = 0;
+        return bux_aes_256_gcm_encrypt(plain, String_Len(plain) as int, key, iv, tag, &outlen);
+    }
 
-// AES-256-GCM decrypt. Returns plaintext. tag must be the 16-byte auth tag from encryption.
-func Aes_GcmDecrypt(cipher: String, key: String, iv: String, tag: String) -> String {
-    let outlen: int = 0;
-    return bux_aes_256_gcm_decrypt(cipher, String_Len(cipher) as int, key, iv, tag, &outlen);
-}
+    // AES-256-GCM decrypt. Returns plaintext. tag must be the 16-byte auth tag from encryption.
+    func Aes_GcmDecrypt(cipher: String, key: String, iv: String, tag: String) -> String {
+        let outlen: int = 0;
+        return bux_aes_256_gcm_decrypt(cipher, String_Len(cipher) as int, key, iv, tag, &outlen);
+    }
 }

lib/crypto/base64.bux

@@ -3,32 +3,32 @@
 // =============================================================================
 module Std::Crypto::Base64 {
 
-import Std::String::{String_Len};
+    import Std::String::{String_Len};
 
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
-extern func bux_base64url_encode(data: String, len: int) -> String;
-extern func bux_base64url_decode(data: String, len: int, outlen: *int) -> String;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
+    extern func bux_base64url_encode(data: String, len: int) -> String;
+    extern func bux_base64url_decode(data: String, len: int, outlen: *int) -> String;
 
-// --- Standard Base64 ---
+    // --- Standard Base64 ---
 
-func Base64_Encode(s: String) -> String {
-    return bux_base64_encode(s, String_Len(s) as int);
-}
-
-func Base64_Decode(s: String) -> String {
-    let outlen: int = 0;
-    return bux_base64_decode(s, String_Len(s) as int, &outlen);
-}
-
-// --- Base64URL (RFC 4648 §5, uses - and _ instead of + and /, no padding) ---
-
-func Base64URL_Encode(s: String) -> String {
-    return bux_base64url_encode(s, String_Len(s) as int);
-}
-
-func Base64URL_Decode(s: String) -> String {
-    let outlen: int = 0;
-    return bux_base64url_decode(s, String_Len(s) as int, &outlen);
-}
+    func Base64_Encode(s: String) -> String {
+        return bux_base64_encode(s, String_Len(s) as int);
+    }
+
+    func Base64_Decode(s: String) -> String {
+        let outlen: int = 0;
+        return bux_base64_decode(s, String_Len(s) as int, &outlen);
+    }
+
+    // --- Base64URL (RFC 4648 §5, uses - and _ instead of + and /, no padding) ---
+
+    func Base64URL_Encode(s: String) -> String {
+        return bux_base64url_encode(s, String_Len(s) as int);
+    }
+
+    func Base64URL_Decode(s: String) -> String {
+        let outlen: int = 0;
+        return bux_base64url_decode(s, String_Len(s) as int, &outlen);
+    }
 }

lib/crypto/ecdsa.bux

@@ -3,56 +3,56 @@
 // =============================================================================
 module Std::Crypto::Ecdsa {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len};
 
-// Extern declarations for the runtime C implementations
-extern func bux_ecdsa_sign_p256(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
-extern func bux_ecdsa_verify_p256(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
-extern func bux_ecdsa_sign_p384(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
-extern func bux_ecdsa_verify_p384(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
+    // Extern declarations for the runtime C implementations
+    extern func bux_ecdsa_sign_p256(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
+    extern func bux_ecdsa_verify_p256(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
+    extern func bux_ecdsa_sign_p384(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
+    extern func bux_ecdsa_verify_p384(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
 
-func Ecdsa_SignP256(pemPrivateKey: String, data: String) -> String {
-    let siglen: int = 0;
-    return bux_ecdsa_sign_p256(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
-}
+    func Ecdsa_SignP256(pemPrivateKey: String, data: String) -> String {
+        let siglen: int = 0;
+        return bux_ecdsa_sign_p256(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
+    }
 
-func Ecdsa_SignP256Base64(pemPrivateKey: String, data: String) -> String {
-    let raw: String = Ecdsa_SignP256(pemPrivateKey, data);
-    return bux_base64_encode(raw, String_Len(raw) as int);
-}
+    func Ecdsa_SignP256Base64(pemPrivateKey: String, data: String) -> String {
+        let raw: String = Ecdsa_SignP256(pemPrivateKey, data);
+        return bux_base64_encode(raw, String_Len(raw) as int);
+    }
 
-func Ecdsa_VerifyP256(pemPublicKey: String, data: String, signature: String) -> bool {
-    let r: int = bux_ecdsa_verify_p256(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
-    return r == 1;
-}
+    func Ecdsa_VerifyP256(pemPublicKey: String, data: String, signature: String) -> bool {
+        let r: int = bux_ecdsa_verify_p256(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
+        return r == 1;
+    }
 
-func Ecdsa_VerifyP256Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
-    let outlen: int = 0;
-    let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
-    return Ecdsa_VerifyP256(pemPublicKey, data, sig);
-}
+    func Ecdsa_VerifyP256Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
+        let outlen: int = 0;
+        let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
+        return Ecdsa_VerifyP256(pemPublicKey, data, sig);
+    }
 
-func Ecdsa_SignP384(pemPrivateKey: String, data: String) -> String {
-    let siglen: int = 0;
-    return bux_ecdsa_sign_p384(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
-}
+    func Ecdsa_SignP384(pemPrivateKey: String, data: String) -> String {
+        let siglen: int = 0;
+        return bux_ecdsa_sign_p384(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
+    }
 
-func Ecdsa_SignP384Base64(pemPrivateKey: String, data: String) -> String {
-    let raw: String = Ecdsa_SignP384(pemPrivateKey, data);
-    return bux_base64_encode(raw, String_Len(raw) as int);
-}
+    func Ecdsa_SignP384Base64(pemPrivateKey: String, data: String) -> String {
+        let raw: String = Ecdsa_SignP384(pemPrivateKey, data);
+        return bux_base64_encode(raw, String_Len(raw) as int);
+    }
 
-func Ecdsa_VerifyP384(pemPublicKey: String, data: String, signature: String) -> bool {
-    let r: int = bux_ecdsa_verify_p384(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
-    return r == 1;
-}
+    func Ecdsa_VerifyP384(pemPublicKey: String, data: String, signature: String) -> bool {
+        let r: int = bux_ecdsa_verify_p384(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
+        return r == 1;
+    }
 
-func Ecdsa_VerifyP384Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
-    let outlen: int = 0;
-    let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
-    return Ecdsa_VerifyP384(pemPublicKey, data, sig);
-}
+    func Ecdsa_VerifyP384Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
+        let outlen: int = 0;
+        let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
+        return Ecdsa_VerifyP384(pemPublicKey, data, sig);
+    }
 }

lib/crypto/ed25519.bux

@@ -3,78 +3,78 @@
 // =============================================================================
 module Std::Crypto::Ed25519 {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len, String_Concat};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len, String_Concat};
 
-extern func bux_ed25519_keypair(pubKey: *void, privKey: *void) -> int;
-extern func bux_ed25519_sign(privKey: String, data: String, datalen: int, sig: *void) -> int;
-extern func bux_ed25519_verify(pubKey: String, sig: String, data: String, datalen: int) -> int;
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
+    extern func bux_ed25519_keypair(pubKey: *void, privKey: *void) -> int;
+    extern func bux_ed25519_sign(privKey: String, data: String, datalen: int, sig: *void) -> int;
+    extern func bux_ed25519_verify(pubKey: String, sig: String, data: String, datalen: int) -> int;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
 
-const ED25519_PUBKEY_SIZE: int  = 32;
-const ED25519_PRIVKEY_SIZE: int = 32;
-const ED25519_SIG_SIZE: int     = 64;
+    const ED25519_PUBKEY_SIZE: int  = 32;
+    const ED25519_PRIVKEY_SIZE: int = 32;
+    const ED25519_SIG_SIZE: int     = 64;
 
-// --- Key Generation ---
+    // --- Key Generation ---
 
-// Ed25519_Keypair: generates a new keypair.
-// Returns true on success. pubKey and privKey receive 32-byte raw keys.
-func Ed25519_Keypair(pubKey: *void, privKey: *void) -> bool {
-    let r: int = bux_ed25519_keypair(pubKey, privKey);
-    return r == 1;
-}
+    // Ed25519_Keypair: generates a new keypair.
+    // Returns true on success. pubKey and privKey receive 32-byte raw keys.
+    func Ed25519_Keypair(pubKey: *void, privKey: *void) -> bool {
+        let r: int = bux_ed25519_keypair(pubKey, privKey);
+        return r == 1;
+    }
 
-// Convenience: generate and return base64-encoded keypair
-func Ed25519_KeypairBase64() -> String {
-    let pubBuf: *void = Alloc(ED25519_PUBKEY_SIZE as uint);
-    let priv: *void = Alloc(ED25519_PRIVKEY_SIZE as uint);
-    if bux_ed25519_keypair(pubBuf, priv) != 1 {
+    // Convenience: generate and return base64-encoded keypair
+    func Ed25519_KeypairBase64() -> String {
+        let pubBuf: *void = Alloc(ED25519_PUBKEY_SIZE as uint);
+        let priv: *void = Alloc(ED25519_PRIVKEY_SIZE as uint);
+        if bux_ed25519_keypair(pubBuf, priv) != 1 {
+            Free(pubBuf);
+            Free(priv);
+            return "";
+        }
+        // Return "pub_b64:priv_b64"
+        let pubB64: String = bux_base64_encode(pubBuf as String, ED25519_PUBKEY_SIZE);
+        let privB64: String = bux_base64_encode(priv as String, ED25519_PRIVKEY_SIZE);
         Free(pubBuf);
         Free(priv);
-        return "";
+        let pair: String = String_Concat(pubB64, ":");
+        return String_Concat(pair, privB64);
     }
-    // Return "pub_b64:priv_b64"
-    let pubB64: String = bux_base64_encode(pubBuf as String, ED25519_PUBKEY_SIZE);
-    let privB64: String = bux_base64_encode(priv as String, ED25519_PRIVKEY_SIZE);
-    Free(pubBuf);
-    Free(priv);
-    let pair: String = String_Concat(pubB64, ":");
-    return String_Concat(pair, privB64);
-}
 
-// --- Sign ---
+    // --- Sign ---
 
-// Ed25519_Sign: sign data with 32-byte raw private key. Returns 64-byte raw signature.
-func Ed25519_Sign(privKey: String, data: String) -> String {
-    let sig: *void = Alloc(ED25519_SIG_SIZE as uint);
-    if bux_ed25519_sign(privKey, data, String_Len(data) as int, sig) != 1 {
-        Free(sig);
-        return "";
+    // Ed25519_Sign: sign data with 32-byte raw private key. Returns 64-byte raw signature.
+    func Ed25519_Sign(privKey: String, data: String) -> String {
+        let sig: *void = Alloc(ED25519_SIG_SIZE as uint);
+        if bux_ed25519_sign(privKey, data, String_Len(data) as int, sig) != 1 {
+            Free(sig);
+            return "";
+        }
+        return sig as String;
     }
-    return sig as String;
-}
 
-// Convenience: sign and return base64-encoded signature
-func Ed25519_SignBase64(privKey: String, data: String) -> String {
-    let sig: String = Ed25519_Sign(privKey, data);
-    if String_Len(sig) == 0 { return ""; }
-    return bux_base64_encode(sig, ED25519_SIG_SIZE);
-}
+    // Convenience: sign and return base64-encoded signature
+    func Ed25519_SignBase64(privKey: String, data: String) -> String {
+        let sig: String = Ed25519_Sign(privKey, data);
+        if String_Len(sig) == 0 { return ""; }
+        return bux_base64_encode(sig, ED25519_SIG_SIZE);
+    }
 
-// --- Verify ---
+    // --- Verify ---
 
-// Ed25519_Verify: verify a 64-byte raw signature against data with 32-byte public key.
-func Ed25519_Verify(pubKey: String, signature: String, data: String) -> bool {
-    let r: int = bux_ed25519_verify(pubKey, signature, data, String_Len(data) as int);
-    return r == 1;
-}
+    // Ed25519_Verify: verify a 64-byte raw signature against data with 32-byte public key.
+    func Ed25519_Verify(pubKey: String, signature: String, data: String) -> bool {
+        let r: int = bux_ed25519_verify(pubKey, signature, data, String_Len(data) as int);
+        return r == 1;
+    }
 
-// Convenience: verify a base64-encoded signature
-func Ed25519_VerifyBase64(pubKey: String, signatureB64: String, data: String) -> bool {
-    let outlen: int = 0;
-    let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
-    if outlen != ED25519_SIG_SIZE { return false; }
-    return Ed25519_Verify(pubKey, sig, data);
-}
+    // Convenience: verify a base64-encoded signature
+    func Ed25519_VerifyBase64(pubKey: String, signatureB64: String, data: String) -> bool {
+        let outlen: int = 0;
+        let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
+        if outlen != ED25519_SIG_SIZE { return false; }
+        return Ed25519_Verify(pubKey, sig, data);
+    }
 }

lib/crypto/hash.bux

@@ -3,71 +3,71 @@
 // =============================================================================
 module Std::Crypto::Hash {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len};
 
-extern func bux_sha1(data: String, len: int, out: *void);
-extern func bux_sha256(data: String, len: int, out: *void);
-extern func bux_sha384(data: String, len: int, out: *void);
-extern func bux_sha512(data: String, len: int, out: *void);
-extern func bux_bytes_to_hex(data: *void, len: int) -> String;
+    extern func bux_sha1(data: String, len: int, out: *void);
+    extern func bux_sha256(data: String, len: int, out: *void);
+    extern func bux_sha384(data: String, len: int, out: *void);
+    extern func bux_sha512(data: String, len: int, out: *void);
+    extern func bux_bytes_to_hex(data: *void, len: int) -> String;
 
-// --- Convenience wrappers: hex output ---
+    // --- Convenience wrappers: hex output ---
 
-func Hash_Sha1(data: String) -> String {
-    let len: int = String_Len(data) as int;
-    let buf: *void = Alloc(20);
-    bux_sha1(data, len, buf);
-    let result: String = bux_bytes_to_hex(buf, 20);
-    Free(buf);
-    return result;
-}
-
-func Hash_Sha256(data: String) -> String {
-    let len: int = String_Len(data) as int;
-    let buf: *void = Alloc(32);
-    bux_sha256(data, len, buf);
-    let result: String = bux_bytes_to_hex(buf, 32);
-    Free(buf);
-    return result;
-}
-
-func Hash_Sha384(data: String) -> String {
-    let len: int = String_Len(data) as int;
-    let buf: *void = Alloc(48);
-    bux_sha384(data, len, buf);
-    let result: String = bux_bytes_to_hex(buf, 48);
-    Free(buf);
-    return result;
-}
-
-func Hash_Sha512(data: String) -> String {
-    let len: int = String_Len(data) as int;
-    let buf: *void = Alloc(64);
-    bux_sha512(data, len, buf);
-    let result: String = bux_bytes_to_hex(buf, 64);
-    Free(buf);
-    return result;
-}
-
-// --- Raw binary output (caller must Alloc/Free) ---
-
-func Hash_Sha256Raw(data: String, out: *void) {
-    bux_sha256(data, String_Len(data) as int, out);
-}
-
-func Hash_Sha384Raw(data: String, out: *void) {
-    bux_sha384(data, String_Len(data) as int, out);
-}
-
-func Hash_Sha512Raw(data: String, out: *void) {
-    bux_sha512(data, String_Len(data) as int, out);
-}
-
-// --- Digest sizes ---
-
-func Hash_Sha1Size() -> int    { return 20; }
-func Hash_Sha256Size() -> int  { return 32; }
-func Hash_Sha384Size() -> int  { return 48; }
-func Hash_Sha512Size() -> int  { return 64; }
+    func Hash_Sha1(data: String) -> String {
+        let len: int = String_Len(data) as int;
+        let buf: *void = Alloc(20);
+        bux_sha1(data, len, buf);
+        let result: String = bux_bytes_to_hex(buf, 20);
+        Free(buf);
+        return result;
+    }
+
+    func Hash_Sha256(data: String) -> String {
+        let len: int = String_Len(data) as int;
+        let buf: *void = Alloc(32);
+        bux_sha256(data, len, buf);
+        let result: String = bux_bytes_to_hex(buf, 32);
+        Free(buf);
+        return result;
+    }
+
+    func Hash_Sha384(data: String) -> String {
+        let len: int = String_Len(data) as int;
+        let buf: *void = Alloc(48);
+        bux_sha384(data, len, buf);
+        let result: String = bux_bytes_to_hex(buf, 48);
+        Free(buf);
+        return result;
+    }
+
+    func Hash_Sha512(data: String) -> String {
+        let len: int = String_Len(data) as int;
+        let buf: *void = Alloc(64);
+        bux_sha512(data, len, buf);
+        let result: String = bux_bytes_to_hex(buf, 64);
+        Free(buf);
+        return result;
+    }
+
+    // --- Raw binary output (caller must Alloc/Free) ---
+
+    func Hash_Sha256Raw(data: String, out: *void) {
+        bux_sha256(data, String_Len(data) as int, out);
+    }
+
+    func Hash_Sha384Raw(data: String, out: *void) {
+        bux_sha384(data, String_Len(data) as int, out);
+    }
+
+    func Hash_Sha512Raw(data: String, out: *void) {
+        bux_sha512(data, String_Len(data) as int, out);
+    }
+
+    // --- Digest sizes ---
+
+    func Hash_Sha1Size() -> int    { return 20; }
+    func Hash_Sha256Size() -> int  { return 32; }
+    func Hash_Sha384Size() -> int  { return 48; }
+    func Hash_Sha512Size() -> int  { return 64; }
 }

lib/crypto/hmac.bux

@@ -3,90 +3,90 @@
 // =============================================================================
 module Std::Crypto::Hmac {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len};
 
-extern func bux_hmac_sha256(key: String, keylen: int, msg: String, msglen: int, out: *void);
-extern func bux_hmac_sha384(key: String, keylen: int, msg: String, msglen: int, out: *void);
-extern func bux_hmac_sha512(key: String, keylen: int, msg: String, msglen: int, out: *void);
-extern func bux_bytes_to_hex(data: *void, len: int) -> String;
-extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_hmac_sha256(key: String, keylen: int, msg: String, msglen: int, out: *void);
+    extern func bux_hmac_sha384(key: String, keylen: int, msg: String, msglen: int, out: *void);
+    extern func bux_hmac_sha512(key: String, keylen: int, msg: String, msglen: int, out: *void);
+    extern func bux_bytes_to_hex(data: *void, len: int) -> String;
+    extern func bux_base64_encode(data: String, len: int) -> String;
 
-// --- HMAC-SHA256 ---
+    // --- HMAC-SHA256 ---
 
-func Hmac_Sha256(key: String, message: String) -> String {
-    let kl: int = String_Len(key) as int;
-    let ml: int = String_Len(message) as int;
-    let buf: *void = Alloc(32);
-    bux_hmac_sha256(key, kl, message, ml, buf);
-    let result: String = bux_bytes_to_hex(buf, 32);
-    Free(buf);
-    return result;
-}
-
-func Hmac_Sha256Raw(key: String, message: String, out: *void) {
-    bux_hmac_sha256(key, String_Len(key) as int, message, String_Len(message) as int, out);
-}
-
-func Hmac_Sha256Base64(key: String, message: String) -> String {
-    let kl: int = String_Len(key) as int;
-    let ml: int = String_Len(message) as int;
-    let buf: *void = Alloc(32);
-    bux_hmac_sha256(key, kl, message, ml, buf);
-    let result: String = bux_base64_encode(buf as String, 32);
-    Free(buf);
-    return result;
-}
-
-// --- HMAC-SHA384 ---
-
-func Hmac_Sha384(key: String, message: String) -> String {
-    let kl: int = String_Len(key) as int;
-    let ml: int = String_Len(message) as int;
-    let buf: *void = Alloc(48);
-    bux_hmac_sha384(key, kl, message, ml, buf);
-    let result: String = bux_bytes_to_hex(buf, 48);
-    Free(buf);
-    return result;
-}
-
-func Hmac_Sha384Raw(key: String, message: String, out: *void) {
-    bux_hmac_sha384(key, String_Len(key) as int, message, String_Len(message) as int, out);
-}
-
-func Hmac_Sha384Base64(key: String, message: String) -> String {
-    let kl: int = String_Len(key) as int;
-    let ml: int = String_Len(message) as int;
-    let buf: *void = Alloc(48);
-    bux_hmac_sha384(key, kl, message, ml, buf);
-    let result: String = bux_base64_encode(buf as String, 48);
-    Free(buf);
-    return result;
-}
-
-// --- HMAC-SHA512 ---
-
-func Hmac_Sha512(key: String, message: String) -> String {
-    let kl: int = String_Len(key) as int;
-    let ml: int = String_Len(message) as int;
-    let buf: *void = Alloc(64);
-    bux_hmac_sha512(key, kl, message, ml, buf);
-    let result: String = bux_bytes_to_hex(buf, 64);
-    Free(buf);
-    return result;
-}
-
-func Hmac_Sha512Raw(key: String, message: String, out: *void) {
-    bux_hmac_sha512(key, String_Len(key) as int, message, String_Len(message) as int, out);
-}
-
-func Hmac_Sha512Base64(key: String, message: String) -> String {
-    let kl: int = String_Len(key) as int;
-    let ml: int = String_Len(message) as int;
-    let buf: *void = Alloc(64);
-    bux_hmac_sha512(key, kl, message, ml, buf);
-    let result: String = bux_base64_encode(buf as String, 64);
-    Free(buf);
-    return result;
-}
+    func Hmac_Sha256(key: String, message: String) -> String {
+        let kl: int = String_Len(key) as int;
+        let ml: int = String_Len(message) as int;
+        let buf: *void = Alloc(32);
+        bux_hmac_sha256(key, kl, message, ml, buf);
+        let result: String = bux_bytes_to_hex(buf, 32);
+        Free(buf);
+        return result;
+    }
+
+    func Hmac_Sha256Raw(key: String, message: String, out: *void) {
+        bux_hmac_sha256(key, String_Len(key) as int, message, String_Len(message) as int, out);
+    }
+
+    func Hmac_Sha256Base64(key: String, message: String) -> String {
+        let kl: int = String_Len(key) as int;
+        let ml: int = String_Len(message) as int;
+        let buf: *void = Alloc(32);
+        bux_hmac_sha256(key, kl, message, ml, buf);
+        let result: String = bux_base64_encode(buf as String, 32);
+        Free(buf);
+        return result;
+    }
+
+    // --- HMAC-SHA384 ---
+
+    func Hmac_Sha384(key: String, message: String) -> String {
+        let kl: int = String_Len(key) as int;
+        let ml: int = String_Len(message) as int;
+        let buf: *void = Alloc(48);
+        bux_hmac_sha384(key, kl, message, ml, buf);
+        let result: String = bux_bytes_to_hex(buf, 48);
+        Free(buf);
+        return result;
+    }
+
+    func Hmac_Sha384Raw(key: String, message: String, out: *void) {
+        bux_hmac_sha384(key, String_Len(key) as int, message, String_Len(message) as int, out);
+    }
+
+    func Hmac_Sha384Base64(key: String, message: String) -> String {
+        let kl: int = String_Len(key) as int;
+        let ml: int = String_Len(message) as int;
+        let buf: *void = Alloc(48);
+        bux_hmac_sha384(key, kl, message, ml, buf);
+        let result: String = bux_base64_encode(buf as String, 48);
+        Free(buf);
+        return result;
+    }
+
+    // --- HMAC-SHA512 ---
+
+    func Hmac_Sha512(key: String, message: String) -> String {
+        let kl: int = String_Len(key) as int;
+        let ml: int = String_Len(message) as int;
+        let buf: *void = Alloc(64);
+        bux_hmac_sha512(key, kl, message, ml, buf);
+        let result: String = bux_bytes_to_hex(buf, 64);
+        Free(buf);
+        return result;
+    }
+
+    func Hmac_Sha512Raw(key: String, message: String, out: *void) {
+        bux_hmac_sha512(key, String_Len(key) as int, message, String_Len(message) as int, out);
+    }
+
+    func Hmac_Sha512Base64(key: String, message: String) -> String {
+        let kl: int = String_Len(key) as int;
+        let ml: int = String_Len(message) as int;
+        let buf: *void = Alloc(64);
+        bux_hmac_sha512(key, kl, message, ml, buf);
+        let result: String = bux_base64_encode(buf as String, 64);
+        Free(buf);
+        return result;
+    }
 }

lib/crypto/jwt.bux

@@ -4,233 +4,233 @@
 // =============================================================================
 module Std::Crypto::Jwt {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len, String_Eq, String_StartsWith, String_Concat};
-import Std::Crypto::Base64::{Base64URL_Encode, Base64URL_Decode};
-import Std::Crypto::Hash::{Hash_Sha256Raw, Hash_Sha384Raw, Hash_Sha512Raw};
-import Std::Crypto::Hmac::{Hmac_Sha256Raw, Hmac_Sha384Raw, Hmac_Sha512Raw};
-import Std::Crypto::Rsa::{Rsa_SignSha256, Rsa_SignSha384, Rsa_SignSha512,
-                          Rsa_VerifySha256, Rsa_VerifySha384, Rsa_VerifySha512};
-import Std::Crypto::Ecdsa::{Ecdsa_SignP256, Ecdsa_SignP384, Ecdsa_VerifyP256, Ecdsa_VerifyP384};
-import Std::Crypto::Ed25519::{Ed25519_Sign, Ed25519_Verify};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len, String_Eq, String_StartsWith, String_Concat};
+    import Std::Crypto::Base64::{Base64URL_Encode, Base64URL_Decode};
+    import Std::Crypto::Hash::{Hash_Sha256Raw, Hash_Sha384Raw, Hash_Sha512Raw};
+    import Std::Crypto::Hmac::{Hmac_Sha256Raw, Hmac_Sha384Raw, Hmac_Sha512Raw};
+    import Std::Crypto::Rsa::{Rsa_SignSha256, Rsa_SignSha384, Rsa_SignSha512,
+        Rsa_VerifySha256, Rsa_VerifySha384, Rsa_VerifySha512};
+    import Std::Crypto::Ecdsa::{Ecdsa_SignP256, Ecdsa_SignP384, Ecdsa_VerifyP256, Ecdsa_VerifyP384};
+    import Std::Crypto::Ed25519::{Ed25519_Sign, Ed25519_Verify};
 
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_str_split_count(s: String, delim: String) -> uint;
-extern func bux_str_split_part(s: String, delim: String, index: uint) -> String;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_str_split_count(s: String, delim: String) -> uint;
+    extern func bux_str_split_part(s: String, delim: String, index: uint) -> String;
 
-// --- JWT Algorithm enum ---
-enum JwtAlg {
-    HS256,
-    HS384,
-    HS512,
-    RS256,
-    RS384,
-    RS512,
-    ES256,
-    ES384,
-    EdDSA,
-}
-
-// --- Header ---
-
-// Jwt_MakeHeader: build the JWT header JSON string for the given algorithm
-func Jwt_MakeHeader(alg: JwtAlg) -> String {
-    if alg.tag == JwtAlg_HS256 { return "{\"alg\":\"HS256\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_HS384 { return "{\"alg\":\"HS384\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_HS512 { return "{\"alg\":\"HS512\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_RS256 { return "{\"alg\":\"RS256\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_RS384 { return "{\"alg\":\"RS384\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_RS512 { return "{\"alg\":\"RS512\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_ES256 { return "{\"alg\":\"ES256\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_ES384 { return "{\"alg\":\"ES384\",\"typ\":\"JWT\"}"; }
-    if alg.tag == JwtAlg_EdDSA { return "{\"alg\":\"EdDSA\",\"typ\":\"JWT\"}"; }
-    return "{\"alg\":\"none\",\"typ\":\"JWT\"}";
-}
-
-// --- Signing ---
-
-// Sign the JWT signing input with the given algorithm
-func Jwt_Sign(alg: JwtAlg, signingInput: String, key: String) -> String {
-    // --- HMAC algorithms ---
-    if alg.tag == JwtAlg_HS256 {
-        let buf: *void = Alloc(32);
-        Hmac_Sha256Raw(key, signingInput, buf);
-        let result: String = bux_base64_encode(buf as String, 32);
-        Free(buf);
-        return result;
-    }
-    if alg.tag == JwtAlg_HS384 {
-        let buf: *void = Alloc(48);
-        Hmac_Sha384Raw(key, signingInput, buf);
-        let result: String = bux_base64_encode(buf as String, 48);
-        Free(buf);
-        return result;
-    }
-    if alg.tag == JwtAlg_HS512 {
-        let buf: *void = Alloc(64);
-        Hmac_Sha512Raw(key, signingInput, buf);
-        let result: String = bux_base64_encode(buf as String, 64);
-        Free(buf);
-        return result;
+    // --- JWT Algorithm enum ---
+    enum JwtAlg {
+        HS256,
+        HS384,
+        HS512,
+        RS256,
+        RS384,
+        RS512,
+        ES256,
+        ES384,
+        EdDSA,
     }
 
-    // --- RSA algorithms (key is PEM private key) ---
-    if alg.tag == JwtAlg_RS256 {
-        let raw: String = Rsa_SignSha256(key, signingInput);
-        return bux_base64_encode(raw, String_Len(raw) as int);
-    }
-    if alg.tag == JwtAlg_RS384 {
-        let raw: String = Rsa_SignSha384(key, signingInput);
-        return bux_base64_encode(raw, String_Len(raw) as int);
-    }
-    if alg.tag == JwtAlg_RS512 {
-        let raw: String = Rsa_SignSha512(key, signingInput);
-        return bux_base64_encode(raw, String_Len(raw) as int);
+    // --- Header ---
+
+    // Jwt_MakeHeader: build the JWT header JSON string for the given algorithm
+    func Jwt_MakeHeader(alg: JwtAlg) -> String {
+        if alg.tag == JwtAlg_HS256 { return "{\"alg\":\"HS256\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_HS384 { return "{\"alg\":\"HS384\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_HS512 { return "{\"alg\":\"HS512\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_RS256 { return "{\"alg\":\"RS256\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_RS384 { return "{\"alg\":\"RS384\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_RS512 { return "{\"alg\":\"RS512\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_ES256 { return "{\"alg\":\"ES256\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_ES384 { return "{\"alg\":\"ES384\",\"typ\":\"JWT\"}"; }
+        if alg.tag == JwtAlg_EdDSA { return "{\"alg\":\"EdDSA\",\"typ\":\"JWT\"}"; }
+        return "{\"alg\":\"none\",\"typ\":\"JWT\"}";
     }
 
-    // --- ECDSA algorithms (key is PEM private key) ---
-    if alg.tag == JwtAlg_ES256 {
-        let raw: String = Ecdsa_SignP256(key, signingInput);
-        return bux_base64_encode(raw, String_Len(raw) as int);
-    }
-    if alg.tag == JwtAlg_ES384 {
-        let raw: String = Ecdsa_SignP384(key, signingInput);
-        return bux_base64_encode(raw, String_Len(raw) as int);
+    // --- Signing ---
+
+    // Sign the JWT signing input with the given algorithm
+    func Jwt_Sign(alg: JwtAlg, signingInput: String, key: String) -> String {
+        // --- HMAC algorithms ---
+        if alg.tag == JwtAlg_HS256 {
+            let buf: *void = Alloc(32);
+            Hmac_Sha256Raw(key, signingInput, buf);
+            let result: String = bux_base64_encode(buf as String, 32);
+            Free(buf);
+            return result;
+        }
+        if alg.tag == JwtAlg_HS384 {
+            let buf: *void = Alloc(48);
+            Hmac_Sha384Raw(key, signingInput, buf);
+            let result: String = bux_base64_encode(buf as String, 48);
+            Free(buf);
+            return result;
+        }
+        if alg.tag == JwtAlg_HS512 {
+            let buf: *void = Alloc(64);
+            Hmac_Sha512Raw(key, signingInput, buf);
+            let result: String = bux_base64_encode(buf as String, 64);
+            Free(buf);
+            return result;
+        }
+
+        // --- RSA algorithms (key is PEM private key) ---
+        if alg.tag == JwtAlg_RS256 {
+            let raw: String = Rsa_SignSha256(key, signingInput);
+            return bux_base64_encode(raw, String_Len(raw) as int);
+        }
+        if alg.tag == JwtAlg_RS384 {
+            let raw: String = Rsa_SignSha384(key, signingInput);
+            return bux_base64_encode(raw, String_Len(raw) as int);
+        }
+        if alg.tag == JwtAlg_RS512 {
+            let raw: String = Rsa_SignSha512(key, signingInput);
+            return bux_base64_encode(raw, String_Len(raw) as int);
+        }
+
+        // --- ECDSA algorithms (key is PEM private key) ---
+        if alg.tag == JwtAlg_ES256 {
+            let raw: String = Ecdsa_SignP256(key, signingInput);
+            return bux_base64_encode(raw, String_Len(raw) as int);
+        }
+        if alg.tag == JwtAlg_ES384 {
+            let raw: String = Ecdsa_SignP384(key, signingInput);
+            return bux_base64_encode(raw, String_Len(raw) as int);
+        }
+
+        // --- EdDSA (key is 32-byte raw private key) ---
+        if alg.tag == JwtAlg_EdDSA {
+            return Ed25519_Sign(key, signingInput);
+        }
+
+        return "";
     }
 
-    // --- EdDSA (key is 32-byte raw private key) ---
-    if alg.tag == JwtAlg_EdDSA {
-        return Ed25519_Sign(key, signingInput);
-    }
+    // --- Verify ---
 
-    return "";
-}
+    // Verify a JWT signature
+    func Jwt_Verify(alg: JwtAlg, signingInput: String, signatureB64: String, key: String) -> bool {
+        // --- HMAC algorithms ---
+        if alg.tag == JwtAlg_HS256 {
+            let expectBuf: *void = Alloc(32);
+            Hmac_Sha256Raw(key, signingInput, expectBuf);
+            let expectB64: String = bux_base64_encode(expectBuf as String, 32);
+            Free(expectBuf);
+            return String_Eq(expectB64, signatureB64);
+        }
+        if alg.tag == JwtAlg_HS384 {
+            let expectBuf: *void = Alloc(48);
+            Hmac_Sha384Raw(key, signingInput, expectBuf);
+            let expectB64: String = bux_base64_encode(expectBuf as String, 48);
+            Free(expectBuf);
+            return String_Eq(expectB64, signatureB64);
+        }
+        if alg.tag == JwtAlg_HS512 {
+            let expectBuf: *void = Alloc(64);
+            Hmac_Sha512Raw(key, signingInput, expectBuf);
+            let expectB64: String = bux_base64_encode(expectBuf as String, 64);
+            Free(expectBuf);
+            return String_Eq(expectB64, signatureB64);
+        }
 
-// --- Verify ---
+        // --- RSA algorithms ---
+        if alg.tag == JwtAlg_RS256 { return Rsa_VerifySha256(key, signingInput, signatureB64); }
+        if alg.tag == JwtAlg_RS384 { return Rsa_VerifySha384(key, signingInput, signatureB64); }
+        if alg.tag == JwtAlg_RS512 { return Rsa_VerifySha512(key, signingInput, signatureB64); }
 
-// Verify a JWT signature
-func Jwt_Verify(alg: JwtAlg, signingInput: String, signatureB64: String, key: String) -> bool {
-    // --- HMAC algorithms ---
-    if alg.tag == JwtAlg_HS256 {
-        let expectBuf: *void = Alloc(32);
-        Hmac_Sha256Raw(key, signingInput, expectBuf);
-        let expectB64: String = bux_base64_encode(expectBuf as String, 32);
-        Free(expectBuf);
-        return String_Eq(expectB64, signatureB64);
-    }
-    if alg.tag == JwtAlg_HS384 {
-        let expectBuf: *void = Alloc(48);
-        Hmac_Sha384Raw(key, signingInput, expectBuf);
-        let expectB64: String = bux_base64_encode(expectBuf as String, 48);
-        Free(expectBuf);
-        return String_Eq(expectB64, signatureB64);
-    }
-    if alg.tag == JwtAlg_HS512 {
-        let expectBuf: *void = Alloc(64);
-        Hmac_Sha512Raw(key, signingInput, expectBuf);
-        let expectB64: String = bux_base64_encode(expectBuf as String, 64);
-        Free(expectBuf);
-        return String_Eq(expectB64, signatureB64);
-    }
+        // --- ECDSA algorithms ---
+        if alg.tag == JwtAlg_ES256 { return Ecdsa_VerifyP256(key, signingInput, signatureB64); }
+        if alg.tag == JwtAlg_ES384 { return Ecdsa_VerifyP384(key, signingInput, signatureB64); }
 
-    // --- RSA algorithms ---
-    if alg.tag == JwtAlg_RS256 { return Rsa_VerifySha256(key, signingInput, signatureB64); }
-    if alg.tag == JwtAlg_RS384 { return Rsa_VerifySha384(key, signingInput, signatureB64); }
-    if alg.tag == JwtAlg_RS512 { return Rsa_VerifySha512(key, signingInput, signatureB64); }
+        // --- EdDSA ---
+        if alg.tag == JwtAlg_EdDSA { return Ed25519_Verify(key, signatureB64, signingInput); }
 
-    // --- ECDSA algorithms ---
-    if alg.tag == JwtAlg_ES256 { return Ecdsa_VerifyP256(key, signingInput, signatureB64); }
-    if alg.tag == JwtAlg_ES384 { return Ecdsa_VerifyP384(key, signingInput, signatureB64); }
-
-    // --- EdDSA ---
-    if alg.tag == JwtAlg_EdDSA { return Ed25519_Verify(key, signatureB64, signingInput); }
-
-    return false;
-}
-
-// --- Encode ---
-
-// Jwt_Encode: create a signed JWT
-//   headerJson — JSON header string (use Jwt_MakeHeader or custom)
-//   payloadJson — JSON payload/claims string
-//   alg — signing algorithm
-//   key — signing key (HMAC secret, RSA PEM, ECDSA PEM, or Ed25519 raw privkey)
-// Returns the complete "header.payload.signature" JWT string
-func Jwt_Encode(headerJson: String, payloadJson: String, alg: JwtAlg, key: String) -> String {
-    let headerB64: String = Base64URL_Encode(headerJson);
-    let payloadB64: String = Base64URL_Encode(payloadJson);
-    let signingInput: String = String_Concat(headerB64, ".");
-    let signingInputFull: String = String_Concat(signingInput, payloadB64);
-
-    let sigB64: String = Jwt_Sign(alg, signingInputFull, key);
-
-    let part1: String = String_Concat(signingInputFull, ".");
-    return String_Concat(part1, sigB64);
-}
-
-// --- Decode ---
-
-// Jwt_Decode: decode and verify a JWT.
-//   token — the full "header.payload.signature" string
-//   alg — expected algorithm
-//   key — verification key
-//   headerOut — receives decoded header JSON
-//   payloadOut — receives decoded payload JSON
-// Returns true if signature is valid.
-func Jwt_Decode(token: String, alg: JwtAlg, key: String,
-                headerOut: *String, payloadOut: *String) -> bool {
-    // Split by "."
-    let partCount: uint = bux_str_split_count(token, ".");
-    if partCount != 3 { return false; }
-
-    let headerB64: String = bux_str_split_part(token, ".", 0);
-    let payloadB64: String = bux_str_split_part(token, ".", 1);
-    let sigB64: String = bux_str_split_part(token, ".", 2);
-
-    // Build signing input
-    let input: String = String_Concat(headerB64, ".");
-    let signingInput: String = String_Concat(input, payloadB64);
-
-    // Verify signature
-    if !Jwt_Verify(alg, signingInput, sigB64, key) {
         return false;
     }
 
-    // Decode
-    headerOut[0] = Base64URL_Decode(headerB64);
-    payloadOut[0] = Base64URL_Decode(payloadB64);
-    return true;
-}
+    // --- Encode ---
 
-// --- Convenience: Encode with standard header ---
+    // Jwt_Encode: create a signed JWT
+    //   headerJson — JSON header string (use Jwt_MakeHeader or custom)
+    //   payloadJson — JSON payload/claims string
+    //   alg — signing algorithm
+    //   key — signing key (HMAC secret, RSA PEM, ECDSA PEM, or Ed25519 raw privkey)
+    // Returns the complete "header.payload.signature" JWT string
+    func Jwt_Encode(headerJson: String, payloadJson: String, alg: JwtAlg, key: String) -> String {
+        let headerB64: String = Base64URL_Encode(headerJson);
+        let payloadB64: String = Base64URL_Encode(payloadJson);
+        let signingInput: String = String_Concat(headerB64, ".");
+        let signingInputFull: String = String_Concat(signingInput, payloadB64);
 
-func Jwt_EncodeHS256(payloadJson: String, secret: String) -> String {
-    let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_HS256 });
-    return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_HS256 }, secret);
-}
+        let sigB64: String = Jwt_Sign(alg, signingInputFull, key);
 
-func Jwt_EncodeHS384(payloadJson: String, secret: String) -> String {
-    let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_HS384 });
-    return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_HS384 }, secret);
-}
+        let part1: String = String_Concat(signingInputFull, ".");
+        return String_Concat(part1, sigB64);
+    }
 
-func Jwt_EncodeHS512(payloadJson: String, secret: String) -> String {
-    let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_HS512 });
-    return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_HS512 }, secret);
-}
+    // --- Decode ---
 
-func Jwt_EncodeRS256(payloadJson: String, pemPrivateKey: String) -> String {
-    let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_RS256 });
-    return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_RS256 }, pemPrivateKey);
-}
+    // Jwt_Decode: decode and verify a JWT.
+    //   token — the full "header.payload.signature" string
+    //   alg — expected algorithm
+    //   key — verification key
+    //   headerOut — receives decoded header JSON
+    //   payloadOut — receives decoded payload JSON
+    // Returns true if signature is valid.
+    func Jwt_Decode(token: String, alg: JwtAlg, key: String,
+    headerOut: *String, payloadOut: *String) -> bool {
+        // Split by "."
+        let partCount: uint = bux_str_split_count(token, ".");
+        if partCount != 3 { return false; }
 
-func Jwt_EncodeES256(payloadJson: String, pemPrivateKey: String) -> String {
-    let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_ES256 });
-    return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_ES256 }, pemPrivateKey);
-}
+        let headerB64: String = bux_str_split_part(token, ".", 0);
+        let payloadB64: String = bux_str_split_part(token, ".", 1);
+        let sigB64: String = bux_str_split_part(token, ".", 2);
 
-func Jwt_EncodeEdDSA(payloadJson: String, rawPrivKey: String) -> String {
-    let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_EdDSA });
-    return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_EdDSA }, rawPrivKey);
-}
+        // Build signing input
+        let input: String = String_Concat(headerB64, ".");
+        let signingInput: String = String_Concat(input, payloadB64);
+
+        // Verify signature
+        if !Jwt_Verify(alg, signingInput, sigB64, key) {
+            return false;
+        }
+
+        // Decode
+        headerOut[0] = Base64URL_Decode(headerB64);
+        payloadOut[0] = Base64URL_Decode(payloadB64);
+        return true;
+    }
+
+    // --- Convenience: Encode with standard header ---
+
+    func Jwt_EncodeHS256(payloadJson: String, secret: String) -> String {
+        let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_HS256 });
+        return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_HS256 }, secret);
+    }
+
+    func Jwt_EncodeHS384(payloadJson: String, secret: String) -> String {
+        let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_HS384 });
+        return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_HS384 }, secret);
+    }
+
+    func Jwt_EncodeHS512(payloadJson: String, secret: String) -> String {
+        let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_HS512 });
+        return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_HS512 }, secret);
+    }
+
+    func Jwt_EncodeRS256(payloadJson: String, pemPrivateKey: String) -> String {
+        let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_RS256 });
+        return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_RS256 }, pemPrivateKey);
+    }
+
+    func Jwt_EncodeES256(payloadJson: String, pemPrivateKey: String) -> String {
+        let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_ES256 });
+        return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_ES256 }, pemPrivateKey);
+    }
+
+    func Jwt_EncodeEdDSA(payloadJson: String, rawPrivKey: String) -> String {
+        let header: String = Jwt_MakeHeader(JwtAlg { tag: JwtAlg_EdDSA });
+        return Jwt_Encode(header, payloadJson, JwtAlg { tag: JwtAlg_EdDSA }, rawPrivKey);
+    }
 }

lib/crypto/random.bux

@@ -3,61 +3,61 @@
 // =============================================================================
 module Std::Crypto::Random {
 
-import Std::Mem::{Alloc, Free};
+    import Std::Mem::{Alloc, Free};
 
-extern func bux_random_bytes(buf: *void, len: int) -> int;
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_bytes_to_hex(data: *void, len: int) -> String;
+    extern func bux_random_bytes(buf: *void, len: int) -> int;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_bytes_to_hex(data: *void, len: int) -> String;
 
-// RandomBytes: returns n cryptographically secure random bytes as a raw string
-func Random_Bytes(n: int) -> String {
-    if n <= 0 { return ""; }
-    let buf: *void = Alloc(n as uint);
-    if bux_random_bytes(buf, n) != 1 {
-        Free(buf);
-        return "";
+    // RandomBytes: returns n cryptographically secure random bytes as a raw string
+    func Random_Bytes(n: int) -> String {
+        if n <= 0 { return ""; }
+        let buf: *void = Alloc(n as uint);
+        if bux_random_bytes(buf, n) != 1 {
+            Free(buf);
+            return "";
+        }
+        // Return raw buffer as string (binary-safe)
+        return buf as String;
     }
-    // Return raw buffer as string (binary-safe)
-    return buf as String;
-}
 
-// RandomHex: returns n random bytes as lowercase hex
-func Random_Hex(n: int) -> String {
-    if n <= 0 { return ""; }
-    let buf: *void = Alloc(n as uint);
-    if bux_random_bytes(buf, n) != 1 {
+    // RandomHex: returns n random bytes as lowercase hex
+    func Random_Hex(n: int) -> String {
+        if n <= 0 { return ""; }
+        let buf: *void = Alloc(n as uint);
+        if bux_random_bytes(buf, n) != 1 {
+            Free(buf);
+            return "";
+        }
+        let result: String = bux_bytes_to_hex(buf, n);
         Free(buf);
-        return "";
+        return result;
     }
-    let result: String = bux_bytes_to_hex(buf, n);
-    Free(buf);
-    return result;
-}
 
-// RandomBase64: returns n random bytes as base64-encoded string
-func Random_Base64(n: int) -> String {
-    if n <= 0 { return ""; }
-    let buf: *void = Alloc(n as uint);
-    if bux_random_bytes(buf, n) != 1 {
+    // RandomBase64: returns n random bytes as base64-encoded string
+    func Random_Base64(n: int) -> String {
+        if n <= 0 { return ""; }
+        let buf: *void = Alloc(n as uint);
+        if bux_random_bytes(buf, n) != 1 {
+            Free(buf);
+            return "";
+        }
+        let result: String = bux_base64_encode(buf as String, n);
         Free(buf);
-        return "";
+        return result;
     }
-    let result: String = bux_base64_encode(buf as String, n);
-    Free(buf);
-    return result;
-}
 
-// RandomUint32: returns a random 32-bit unsigned integer
-func Random_Uint32() -> uint {
-    let buf: *void = Alloc(4);
-    if bux_random_bytes(buf, 4) != 1 {
+    // RandomUint32: returns a random 32-bit unsigned integer
+    func Random_Uint32() -> uint {
+        let buf: *void = Alloc(4);
+        if bux_random_bytes(buf, 4) != 1 {
+            Free(buf);
+            return 0;
+        }
+        // Interpret first 4 bytes as uint (native endian)
+        let ptr: *uint = buf as *uint;
+        let val: uint = *ptr;
         Free(buf);
-        return 0;
+        return val;
     }
-    // Interpret first 4 bytes as uint (native endian)
-    let ptr: *uint = buf as *uint;
-    let val: uint = *ptr;
-    Free(buf);
-    return val;
-}
 }

lib/crypto/rsa.bux

@@ -3,88 +3,88 @@
 // =============================================================================
 module Std::Crypto::Rsa {
 
-import Std::Mem::{Alloc, Free};
-import Std::String::{String_Len};
+    import Std::Mem::{Alloc, Free};
+    import Std::String::{String_Len};
 
-// Extern declarations for the runtime C implementations
-extern func bux_rsa_sign_sha256(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
-extern func bux_rsa_sign_sha384(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
-extern func bux_rsa_sign_sha512(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
-extern func bux_rsa_verify_sha256(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
-extern func bux_rsa_verify_sha384(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
-extern func bux_rsa_verify_sha512(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
-extern func bux_base64_encode(data: String, len: int) -> String;
-extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
+    // Extern declarations for the runtime C implementations
+    extern func bux_rsa_sign_sha256(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
+    extern func bux_rsa_sign_sha384(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
+    extern func bux_rsa_sign_sha512(key: String, keylen: int, data: String, datalen: int, outlen: *int) -> String;
+    extern func bux_rsa_verify_sha256(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
+    extern func bux_rsa_verify_sha384(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
+    extern func bux_rsa_verify_sha512(key: String, keylen: int, data: String, datalen: int, sig: String, siglen: int) -> int;
+    extern func bux_base64_encode(data: String, len: int) -> String;
+    extern func bux_base64_decode(data: String, len: int, outlen: *int) -> String;
 
-// --- RSA Sign ---
+    // --- RSA Sign ---
 
-// Rsa_SignSha256: sign data with RSA private key (PEM format), returns raw signature
-func Rsa_SignSha256(pemPrivateKey: String, data: String) -> String {
-    let siglen: int = 0;
-    return bux_rsa_sign_sha256(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
-}
-
-func Rsa_SignSha384(pemPrivateKey: String, data: String) -> String {
-    let siglen: int = 0;
-    return bux_rsa_sign_sha384(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
-}
-
-func Rsa_SignSha512(pemPrivateKey: String, data: String) -> String {
-    let siglen: int = 0;
-    return bux_rsa_sign_sha512(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
-}
-
-// Convenience: sign and return base64-encoded signature
-func Rsa_SignSha256Base64(pemPrivateKey: String, data: String) -> String {
-    let raw: String = Rsa_SignSha256(pemPrivateKey, data);
-    return bux_base64_encode(raw, String_Len(raw) as int);
-}
-
-func Rsa_SignSha384Base64(pemPrivateKey: String, data: String) -> String {
-    let raw: String = Rsa_SignSha384(pemPrivateKey, data);
-    return bux_base64_encode(raw, String_Len(raw) as int);
-}
-
-func Rsa_SignSha512Base64(pemPrivateKey: String, data: String) -> String {
-    let raw: String = Rsa_SignSha512(pemPrivateKey, data);
-    return bux_base64_encode(raw, String_Len(raw) as int);
-}
-
-// --- RSA Verify ---
-
-// Rsa_VerifySha256: verify raw signature against data with RSA public key (PEM)
-// Returns true if signature is valid.
-func Rsa_VerifySha256(pemPublicKey: String, data: String, signature: String) -> bool {
-    let r: int = bux_rsa_verify_sha256(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
-    return r == 1;
-}
-
-func Rsa_VerifySha384(pemPublicKey: String, data: String, signature: String) -> bool {
-    let r: int = bux_rsa_verify_sha384(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
-    return r == 1;
-}
-
-func Rsa_VerifySha512(pemPublicKey: String, data: String, signature: String) -> bool {
-    let r: int = bux_rsa_verify_sha512(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
-    return r == 1;
-}
-
-// Convenience: verify base64-encoded signature
-func Rsa_VerifySha256Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
-    let outlen: int = 0;
-    let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
-    return Rsa_VerifySha256(pemPublicKey, data, sig);
-}
-
-func Rsa_VerifySha384Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
-    let outlen: int = 0;
-    let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
-    return Rsa_VerifySha384(pemPublicKey, data, sig);
-}
-
-func Rsa_VerifySha512Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
-    let outlen: int = 0;
-    let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
-    return Rsa_VerifySha512(pemPublicKey, data, sig);
-}
+    // Rsa_SignSha256: sign data with RSA private key (PEM format), returns raw signature
+    func Rsa_SignSha256(pemPrivateKey: String, data: String) -> String {
+        let siglen: int = 0;
+        return bux_rsa_sign_sha256(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
+    }
+
+    func Rsa_SignSha384(pemPrivateKey: String, data: String) -> String {
+        let siglen: int = 0;
+        return bux_rsa_sign_sha384(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
+    }
+
+    func Rsa_SignSha512(pemPrivateKey: String, data: String) -> String {
+        let siglen: int = 0;
+        return bux_rsa_sign_sha512(pemPrivateKey, String_Len(pemPrivateKey) as int, data, String_Len(data) as int, &siglen);
+    }
+
+    // Convenience: sign and return base64-encoded signature
+    func Rsa_SignSha256Base64(pemPrivateKey: String, data: String) -> String {
+        let raw: String = Rsa_SignSha256(pemPrivateKey, data);
+        return bux_base64_encode(raw, String_Len(raw) as int);
+    }
+
+    func Rsa_SignSha384Base64(pemPrivateKey: String, data: String) -> String {
+        let raw: String = Rsa_SignSha384(pemPrivateKey, data);
+        return bux_base64_encode(raw, String_Len(raw) as int);
+    }
+
+    func Rsa_SignSha512Base64(pemPrivateKey: String, data: String) -> String {
+        let raw: String = Rsa_SignSha512(pemPrivateKey, data);
+        return bux_base64_encode(raw, String_Len(raw) as int);
+    }
+
+    // --- RSA Verify ---
+
+    // Rsa_VerifySha256: verify raw signature against data with RSA public key (PEM)
+    // Returns true if signature is valid.
+    func Rsa_VerifySha256(pemPublicKey: String, data: String, signature: String) -> bool {
+        let r: int = bux_rsa_verify_sha256(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
+        return r == 1;
+    }
+
+    func Rsa_VerifySha384(pemPublicKey: String, data: String, signature: String) -> bool {
+        let r: int = bux_rsa_verify_sha384(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
+        return r == 1;
+    }
+
+    func Rsa_VerifySha512(pemPublicKey: String, data: String, signature: String) -> bool {
+        let r: int = bux_rsa_verify_sha512(pemPublicKey, String_Len(pemPublicKey) as int, data, String_Len(data) as int, signature, String_Len(signature) as int);
+        return r == 1;
+    }
+
+    // Convenience: verify base64-encoded signature
+    func Rsa_VerifySha256Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
+        let outlen: int = 0;
+        let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
+        return Rsa_VerifySha256(pemPublicKey, data, sig);
+    }
+
+    func Rsa_VerifySha384Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
+        let outlen: int = 0;
+        let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
+        return Rsa_VerifySha384(pemPublicKey, data, sig);
+    }
+
+    func Rsa_VerifySha512Base64(pemPublicKey: String, data: String, signatureB64: String) -> bool {
+        let outlen: int = 0;
+        let sig: String = bux_base64_decode(signatureB64, String_Len(signatureB64) as int, &outlen);
+        return Rsa_VerifySha512(pemPublicKey, data, sig);
+    }
 }

registry/packages/greet/README.md

@@ -0,0 +1,15 @@
+# greet
+
+Demo package for the Bux registry (`config/registry.toml`).
+
+```bash
+bux add greet
+bux install
+```
+
+```bux
+func Main() -> int {
+    PrintLine(Greet_Hello("Bux"));
+    return 0;
+}
+```

registry/packages/greet/bux.toml

@@ -0,0 +1,9 @@
+[Package]
+Name    = "greet"
+Version = "0.1.1"
+Type    = "lib"
+Authors = ["Bux Core"]
+License = "MIT"
+
+[Build]
+Output = "Lib"

registry/packages/greet/src/Greet.bux

@@ -0,0 +1,14 @@
+// greet — demo registry package (E.1)
+module Greet {
+
+    /// Return a greeting for `name`.
+    func Greet_Hello(name: String) -> String {
+        return String_Concat("Hello, ", String_Concat(name, "!"));
+    }
+
+    /// Return the package version string.
+    func Greet_Version() -> String {
+        return "0.1.1";
+    }
+
+}

src/Main.bux

@@ -1,23 +1,23 @@
 // main.bux — Entry point for the Bux self-hosting compiler
 module Main {
 
-// C runtime for command-line args
-extern func bux_argc() -> int;
-extern func bux_argv(index: int) -> String;
-extern func bux_alloc(size: uint) -> *void;
+    // C runtime for command-line args
+    extern func bux_argc() -> int;
+    extern func bux_argv(index: int) -> String;
+    extern func bux_alloc(size: uint) -> *void;
 
-// Forward declaration from Cli module
-func Cli_Run(args: *String, argCount: int) -> int;
+    // Forward declaration from Cli module
+    func Cli_Run(args: *String, argCount: int) -> int;
 
-func Main() -> int {
-    let count: int = bux_argc();
-    // Allocate array of String pointers
-    let args: *String = bux_alloc(count as uint * 8) as *String;
-    var i: int = 0;
-    while i < count {
-        args[i] = bux_argv(i);
-        i = i + 1;
+    func Main() -> int {
+        let count: int = bux_argc();
+        // Allocate array of String pointers
+        let args: *String = bux_alloc(count as uint * 8) as *String;
+        var i: int = 0;
+        while i < count {
+            args[i] = bux_argv(i);
+            i = i + 1;
+        }
+        return Cli_Run(args, count);
     }
-    return Cli_Run(args, count);
-}
 }

src/ast.bux

@@ -1,437 +1,438 @@
 // ast.bux — AST node types (Expr, Stmt, Decl, Pattern, TypeExpr)
 module Ast {
 
-// ---------------------------------------------------------------------------
-// SourceLocation (inline for convenience)
-// ---------------------------------------------------------------------------
-struct SourceLoc {
-    line: uint32,
-    column: uint32,
-}
-
-// ---------------------------------------------------------------------------
-// Token (lightweight inline)
-// ---------------------------------------------------------------------------
-struct AstToken {
-    kind: int,
-    text: String,
-    line: uint32,
-    column: uint32,
-}
-
-// ---------------------------------------------------------------------------
-// TypeExpr — type expressions
-// ---------------------------------------------------------------------------
-const tekNamed: int = 0;
-const tekPath: int = 1;
-const tekSlice: int = 2;
-const tekPointer: int = 3;
-const tekRef: int = 7;        // &T — shared reference
-const tekMutRef: int = 8;     // &mut T — mutable reference
-const tekTuple: int = 4;
-const tekSelf: int = 5;
-const tekFunc: int = 6;
-
-struct TypeExprList {
-    te: *TypeExpr,
-    next: *TypeExprList,
-}
-
-struct TypeExpr {
-    kind: int,
-    line: uint32,
-    column: uint32,
-    typeName: String,         // for tekNamed / diagnostic name for tekFunc
-    pathStr: String,          // for tekPath (segments joined with ::)
-    pathCount: int,           // number of path segments
-    typeArgName0: String,     // up to 2 type args
-    typeArgName1: String,
-    typeArgCount: int,
-    sliceElement: *TypeExpr,  // for tekSlice
-    pointerPointee: *TypeExpr, // for tekPointer
-    funcParams: *TypeExprList, // for tekFunc
-    funcRet: *TypeExpr,        // for tekFunc
-    funcParamCount: int,       // for tekFunc
-    tupleElems: *TypeExprList, // for tekTuple
-    tupleCount: int,           // for tekTuple
-}
-
-// ---------------------------------------------------------------------------
-// Pattern — match patterns
-// ---------------------------------------------------------------------------
-const pkWildcard: int = 0;
-const pkLiteral: int = 1;
-const pkIdent: int = 2;
-const pkRange: int = 3;
-const pkEnum: int = 4;
-const pkStruct: int = 5;
-const pkTuple: int = 6;
-const pkGuarded: int = 7;    // `p if cond` — patChild1 = inner, patGuardExpr = condition
-
-struct Pattern {
-    kind: int,
-    line: uint32,
-    column: uint32,
-    patIdent: String,        // for pkIdent
-    patLitKind: int,         // for pkLiteral (token kind)
-    patLitText: String,      // for pkLiteral (token text)
-    patRangeInclusive: bool, // for pkRange
-    patEnumPath: String,     // for pkEnum: "Enum::Variant"
-    patStructName: String,   // for pkStruct (type name)
-    patFieldName: String,    // for struct field entry: field name in Point { x: a }
-    patChild1: *Pattern,     // range lo / nested / guarded inner
-    patChild2: *Pattern,     // range hi / nested
-    patArgs: *Pattern,       // pkEnum/pkTuple/pkStruct field list (head)
-    patNext: *Pattern,       // next sibling in patArgs list
-    patGuardExpr: *Expr,     // for pkGuarded: the `if` condition
-}
-
-// Match arm: pattern => body
-struct MatchArm {
-    line: uint32,
-    column: uint32,
-    pattern: *Pattern,
-    body: *Expr,
-    next: *MatchArm,
-}
-
-// ---------------------------------------------------------------------------
-// Expr — expressions (tagged union)
-// ---------------------------------------------------------------------------
-const ekLiteral: int = 0;
-const ekIdent: int = 1;
-const ekSelf: int = 2;
-const ekPath: int = 3;
-const ekSizeOf: int = 4;
-const ekUnary: int = 5;
-const ekPostfix: int = 6;
-const ekBinary: int = 7;
-const ekAssign: int = 8;
-const ekTernary: int = 9;
-const ekRange: int = 10;
-const ekCall: int = 11;
-const ekGenericCall: int = 12;
-const ekIndex: int = 13;
-const ekField: int = 14;
-const ekStructInit: int = 15;
-const ekSlice: int = 16;
-const ekTuple: int = 17;
-const ekCast: int = 18;
-const ekIs: int = 19;
-const ekTry: int = 20;
-const ekUnwrap: int = 23;
-const ekBlock: int = 21;
-const ekMatch: int = 22;
-const ekSpawn: int = 24;
-const ekAwait: int = 25;
-const ekStringInterp: int = 26;
-const ekClosure: int = 27;
-
-struct ExprList {
-    expr: *Expr,
-    next: *ExprList,
-    argName: String,
-}
-
-struct Expr {
-    kind: int,
-    line: uint32,
-    column: uint32,
-    // Common fields
-    strValue: String,        // ident name, path segments, field name, callee
-    intValue: int,           // operator kind, intrinsic kind
-    boolValue: bool,         // range inclusive
-    tokKind: int,            // literal token kind
-    tokText: String,         // literal token text
-    // Children (up to 3 sub-expressions)
-    child1: *Expr,           // left, operand, callee, cond, subject
-    child2: *Expr,           // right, index, then, value
-    child3: *Expr,           // else, third
-    // Extra references
-    refType: *TypeExpr,      // cast type, is type, sizeof type
-    refBlock: *Block,        // for ekBlock
-    // Generic call
-    genericCallee: String,
-    genericTypeArg0: String,
-    genericTypeArg1: String,
-    genericTypeArgCount: int,
-    // Struct init fields
-    structName: String,
-    structFieldCount: int,
-    // Closure params (for ekClosure)
-    closureParams: *Decl,
-    // Captures (for ekClosure)
-    captureCount: int,
-    captureName0: String,
-    captureName1: String,
-    captureName2: String,
-    captureName3: String,
-    captureName4: String,
-    captureName5: String,
-    captureName6: String,
-    captureName7: String,
-    captureType0: int,
-    captureType1: int,
-    captureType2: int,
-    captureType3: int,
-    captureType4: int,
-    captureType5: int,
-    captureType6: int,
-    captureType7: int,
-    // Call arguments (linked list for multi-arg support)
-    callArgs: *ExprList,
-    callArgCount: int,
-    // Match arms (for ekMatch)
-    matchArms: *MatchArm,
-    matchArmCount: int,
-}
-
-// ---------------------------------------------------------------------------
-// Block — sequence of statements
-// ---------------------------------------------------------------------------
-struct Block {
-    line: uint32,
-    column: uint32,
-    stmtCount: int,
-    firstStmt: *Stmt,
-    lastStmt: *Stmt,
-}
-
-// ---------------------------------------------------------------------------
-// Stmt — statements
-// ---------------------------------------------------------------------------
-const skExpr: int = 0;
-const skLet: int = 1;
-const skIf: int = 2;
-const skWhile: int = 3;
-const skDoWhile: int = 4;
-const skLoop: int = 5;
-const skFor: int = 6;
-const skMatch: int = 7;
-const skReturn: int = 8;
-const skBreak: int = 9;
-const skContinue: int = 10;
-const skDecl: int = 11;
-const skDefer: int = 12;
-const skSwitch: int = 13;
-
-struct ElseIf {
-    line: uint32;
-    column: uint32;
-    cond: *Expr;
-    block: *Block;
-}
-
-struct Stmt {
-    kind: int,
-    line: uint32,
-    column: uint32,
-    // Common fields
-    strValue: String,        // let name, pattern ident, label, for var
-    boolValue: bool,         // let mutable
-    // Children
-    child1: *Expr,           // init expr, condition, iter expr, return value
-    child2: *Expr,           // match subject
-    child3: *Expr,           // extra
-    refStmtType: *TypeExpr,  // let type annotation
-    refStmtPattern: *Pattern,// let pattern
-    refStmtDecl: *Decl,     // for skDecl
-    refStmtBlock: *Block,    // then/body block
-    refStmtElse: *Block,     // else block
-    // Else-if chain
-    elseIfCount: int,
-    // Linked list
-    nextStmt: *Stmt,
-}
-
-// ---------------------------------------------------------------------------
-// Decl — declarations
-// ---------------------------------------------------------------------------
-const dkFunc: int = 0;
-const dkStruct: int = 1;
-const dkEnum: int = 2;
-const dkUnion: int = 3;
-const dkInterface: int = 4;
-const dkImpl: int = 5;
-const dkModule: int = 6;
-const dkUse: int = 7;
-const dkConst: int = 8;
-const dkTypeAlias: int = 9;
-const dkExternFunc: int = 10;
-const dkExternVar: int = 11;
-
-struct Param {
-    line: uint32;
-    column: uint32;
-    name: String;
-    refParamType: *TypeExpr;
-    isVariadic: bool;
-    defaultExpr: *Expr;
-}
-
-struct StructField {
-    line: uint32;
-    column: uint32;
-    isPublic: bool;
-    name: String;
-    refFieldType: *TypeExpr;
-}
-
-struct EnumVariant {
-    line: uint32;
-    column: uint32;
-    name: String;
-    fieldCount: int;
-    fieldTypeName0: String;
-    fieldTypeName1: String;
-}
-
-struct Decl {
-    fieldCount: int,
-    fields: *StructField,
-    kind: int,
-    line: uint32,
-    column: uint32,
-    isPublic: bool,
-    isAsync: bool,
-    isChecked: int,          // @[Checked] attribute (0/1)
-    isDrop: int,             // @[Drop] attribute (0/1)
-    isRelease: int,          // @[Release] attribute (0/1)
-    isConst: int,            // const func (0/1)
-    // Names
-    strValue: String,        // decl name
-    strValue2: String,       // interface name, dll name, module path
-    // Type params (up to 2)
-    typeParam0: String,
-    typeParam1: String,
-    typeParamCount: int,
-    // Trait bounds for type params (e.g. <T: Comparable>)
-    typeParam0Bound: String,
-    typeParam1Bound: String,
-    // Params (for functions)
-    paramCount: int,
-    param0: Param,
-    param1: Param,
-    param2: Param,
-    param3: Param,
-    param4: Param,
-    param5: Param,
-    param6: Param,
-    param7: Param,
-    param8: Param,
-    retType: *TypeExpr,
-    // Body
-    refBody: *Block,
-    // Enum variants (up to 8)
-    variantCount: int,
-    variant0: EnumVariant,
-    variant1: EnumVariant,
-    variant2: EnumVariant,
-    variant3: EnumVariant,
-    variant4: EnumVariant,
-    variant5: EnumVariant,
-    variant6: EnumVariant,
-    variant7: EnumVariant,
-    variant8: EnumVariant,
-    // Impl methods (up to 4)
-    methodCount: int,
-    // Use/import
-    useKind: int,
-    usePath: String,
-    useNames: String,        // joined names for multi-import
-    // Const
-    constType: *TypeExpr,
-    constValue: *Expr,
-    // Type alias
-    aliasType: *TypeExpr,
-    // Extern func
-    extFuncDll: String,
-    extFuncVariadic: bool,
-    extFuncRetType: *TypeExpr,
-    // Children
-    childDecl1: *Decl,       // linked list of decls (for module items, impl methods)
-    childDecl2: *Decl,
-    // Struct fields (up to 256)
-}
-
-// ---------------------------------------------------------------------------
-// Module — AST root
-// ---------------------------------------------------------------------------
-struct Module {
-    name: String,
-    path: String,            // path segments joined
-    itemCount: int,
-    firstItem: *Decl,
-}
-
-// ---------------------------------------------------------------------------
-// Constructor helpers
-// ---------------------------------------------------------------------------
-
-func Ast_MakeExpr(kind: int, line: uint32, col: uint32) -> Expr {
-    return Expr { kind: kind, line: line, column: col,
-        strValue: "", intValue: 0, boolValue: false,
-        tokKind: 0, tokText: "",
-        child1: null as *Expr, child2: null as *Expr, child3: null as *Expr,
-        refType: null as *TypeExpr, refBlock: null as *Block,
-        genericCallee: "", genericTypeArg0: "", genericTypeArg1: "", genericTypeArgCount: 0,
-        structName: "", structFieldCount: 0,
-        callArgs: null as *ExprList, callArgCount: 0 };
-}
-
-func Ast_MakeIdent(name: String, line: uint32, col: uint32) -> Expr {
-    var e: Expr = Ast_MakeExpr(ekIdent, line, col);
-    e.strValue = name;
-    return e;
-}
-
-func Ast_MakeLiteral(tokKind: int, text: String, line: uint32, col: uint32) -> Expr {
-    var e: Expr = Ast_MakeExpr(ekLiteral, line, col);
-    e.tokKind = tokKind;
-    e.tokText = text;
-    return e;
-}
-
-func Ast_MakeBinary(op: int, left: *Expr, right: *Expr, line: uint32, col: uint32) -> Expr {
-    var e: Expr = Ast_MakeExpr(ekBinary, line, col);
-    e.intValue = op;
-    e.child1 = left;
-    e.child2 = right;
-    return e;
-}
-
-func Ast_MakeCall(callee: *Expr, line: uint32, col: uint32) -> Expr {
-    var e: Expr = Ast_MakeExpr(ekCall, line, col);
-    e.child1 = callee;
-    return e;
-}
-
-func Ast_MakeStmt(kind: int, line: uint32, col: uint32) -> Stmt {
-    return Stmt { kind: kind, line: line, column: col,
-        strValue: "", boolValue: false,
-        child1: null as *Expr, child2: null as *Expr, child3: null as *Expr,
-        refStmtType: null as *TypeExpr, refStmtPattern: null as *Pattern,
-        refStmtDecl: null as *Decl, refStmtBlock: null as *Block, refStmtElse: null as *Block,
-        elseIfCount: 0 };
-}
-
-func Ast_MakeDecl(kind: int, line: uint32, col: uint32) -> Decl {
-    return Decl { kind: kind, line: line, column: col, isPublic: false,
-        isAsync: false, isChecked: 0, isDrop: 0, isRelease: 0, isConst: 0,
-        strValue: "", strValue2: "",
-        typeParam0: "", typeParam1: "", typeParamCount: 0,
-        typeParam0Bound: "", typeParam1Bound: ""
-        ,
-        paramCount: 0,
-        retType: null as *TypeExpr,
-        refBody: null as *Block,
-        fieldCount: 0,
-        variantCount: 0,
-        methodCount: 0,
-        useKind: 0, usePath: "", useNames: "",
-        constType: null as *TypeExpr, constValue: null as *Expr,
-        aliasType: null as *TypeExpr,
-        extFuncDll: "", extFuncVariadic: false, extFuncRetType: null as *TypeExpr,
-        childDecl1: null as *Decl, childDecl2: null as *Decl };
-}
+    // ---------------------------------------------------------------------------
+    // SourceLocation (inline for convenience)
+    // ---------------------------------------------------------------------------
+    struct SourceLoc {
+        line: uint32,
+        column: uint32,
+    }
+
+    // ---------------------------------------------------------------------------
+    // Token (lightweight inline)
+    // ---------------------------------------------------------------------------
+    struct AstToken {
+        kind: int,
+        text: String,
+        line: uint32,
+        column: uint32,
+    }
+
+    // ---------------------------------------------------------------------------
+    // TypeExpr — type expressions
+    // ---------------------------------------------------------------------------
+    const tekNamed: int = 0;
+    const tekPath: int = 1;
+    const tekSlice: int = 2;
+    const tekPointer: int = 3;
+    const tekRef: int = 7;        // &T — shared reference
+    const tekMutRef: int = 8;     // &mut T — mutable reference
+    const tekTuple: int = 4;
+    const tekSelf: int = 5;
+    const tekFunc: int = 6;
+
+    struct TypeExprList {
+        te: *TypeExpr,
+        next: *TypeExprList,
+    }
+
+    struct TypeExpr {
+        kind: int,
+        line: uint32,
+        column: uint32,
+        typeName: String,         // for tekNamed / diagnostic name for tekFunc
+        pathStr: String,          // for tekPath (segments joined with ::)
+        pathCount: int,           // number of path segments
+        typeArgName0: String,     // up to 2 type args
+        typeArgName1: String,
+        typeArgCount: int,
+        sliceElement: *TypeExpr,  // for tekSlice
+        pointerPointee: *TypeExpr, // for tekPointer / tekRef / tekMutRef
+        refLifetime: String,      // for tekRef / tekMutRef: "'a" or "" (elided)
+        funcParams: *TypeExprList, // for tekFunc
+        funcRet: *TypeExpr,        // for tekFunc
+        funcParamCount: int,       // for tekFunc
+        tupleElems: *TypeExprList, // for tekTuple
+        tupleCount: int,           // for tekTuple
+    }
+
+    // ---------------------------------------------------------------------------
+    // Pattern — match patterns
+    // ---------------------------------------------------------------------------
+    const pkWildcard: int = 0;
+    const pkLiteral: int = 1;
+    const pkIdent: int = 2;
+    const pkRange: int = 3;
+    const pkEnum: int = 4;
+    const pkStruct: int = 5;
+    const pkTuple: int = 6;
+    const pkGuarded: int = 7;    // `p if cond` — patChild1 = inner, patGuardExpr = condition
+
+    struct Pattern {
+        kind: int,
+        line: uint32,
+        column: uint32,
+        patIdent: String,        // for pkIdent
+        patLitKind: int,         // for pkLiteral (token kind)
+        patLitText: String,      // for pkLiteral (token text)
+        patRangeInclusive: bool, // for pkRange
+        patEnumPath: String,     // for pkEnum: "Enum::Variant"
+        patStructName: String,   // for pkStruct (type name)
+        patFieldName: String,    // for struct field entry: field name in Point { x: a }
+        patChild1: *Pattern,     // range lo / nested / guarded inner
+        patChild2: *Pattern,     // range hi / nested
+        patArgs: *Pattern,       // pkEnum/pkTuple/pkStruct field list (head)
+        patNext: *Pattern,       // next sibling in patArgs list
+        patGuardExpr: *Expr,     // for pkGuarded: the `if` condition
+    }
+
+    // Match arm: pattern => body
+    struct MatchArm {
+        line: uint32,
+        column: uint32,
+        pattern: *Pattern,
+        body: *Expr,
+        next: *MatchArm,
+    }
+
+    // ---------------------------------------------------------------------------
+    // Expr — expressions (tagged union)
+    // ---------------------------------------------------------------------------
+    const ekLiteral: int = 0;
+    const ekIdent: int = 1;
+    const ekSelf: int = 2;
+    const ekPath: int = 3;
+    const ekSizeOf: int = 4;
+    const ekUnary: int = 5;
+    const ekPostfix: int = 6;
+    const ekBinary: int = 7;
+    const ekAssign: int = 8;
+    const ekTernary: int = 9;
+    const ekRange: int = 10;
+    const ekCall: int = 11;
+    const ekGenericCall: int = 12;
+    const ekIndex: int = 13;
+    const ekField: int = 14;
+    const ekStructInit: int = 15;
+    const ekSlice: int = 16;
+    const ekTuple: int = 17;
+    const ekCast: int = 18;
+    const ekIs: int = 19;
+    const ekTry: int = 20;
+    const ekUnwrap: int = 23;
+    const ekBlock: int = 21;
+    const ekMatch: int = 22;
+    const ekSpawn: int = 24;
+    const ekAwait: int = 25;
+    const ekStringInterp: int = 26;
+    const ekClosure: int = 27;
+
+    struct ExprList {
+        expr: *Expr,
+        next: *ExprList,
+        argName: String,
+    }
+
+    struct Expr {
+        kind: int,
+        line: uint32,
+        column: uint32,
+        // Common fields
+        strValue: String,        // ident name, path segments, field name, callee
+        intValue: int,           // operator kind, intrinsic kind
+        boolValue: bool,         // range inclusive
+        tokKind: int,            // literal token kind
+        tokText: String,         // literal token text
+        // Children (up to 3 sub-expressions)
+        child1: *Expr,           // left, operand, callee, cond, subject
+        child2: *Expr,           // right, index, then, value
+        child3: *Expr,           // else, third
+        // Extra references
+        refType: *TypeExpr,      // cast type, is type, sizeof type
+        refBlock: *Block,        // for ekBlock
+        // Generic call
+        genericCallee: String,
+        genericTypeArg0: String,
+        genericTypeArg1: String,
+        genericTypeArgCount: int,
+        // Struct init fields
+        structName: String,
+        structFieldCount: int,
+        // Closure params (for ekClosure)
+        closureParams: *Decl,
+        // Captures (for ekClosure)
+        captureCount: int,
+        captureName0: String,
+        captureName1: String,
+        captureName2: String,
+        captureName3: String,
+        captureName4: String,
+        captureName5: String,
+        captureName6: String,
+        captureName7: String,
+        captureType0: int,
+        captureType1: int,
+        captureType2: int,
+        captureType3: int,
+        captureType4: int,
+        captureType5: int,
+        captureType6: int,
+        captureType7: int,
+        // Call arguments (linked list for multi-arg support)
+        callArgs: *ExprList,
+        callArgCount: int,
+        // Match arms (for ekMatch)
+        matchArms: *MatchArm,
+        matchArmCount: int,
+    }
+
+    // ---------------------------------------------------------------------------
+    // Block — sequence of statements
+    // ---------------------------------------------------------------------------
+    struct Block {
+        line: uint32,
+        column: uint32,
+        stmtCount: int,
+        firstStmt: *Stmt,
+        lastStmt: *Stmt,
+    }
+
+    // ---------------------------------------------------------------------------
+    // Stmt — statements
+    // ---------------------------------------------------------------------------
+    const skExpr: int = 0;
+    const skLet: int = 1;
+    const skIf: int = 2;
+    const skWhile: int = 3;
+    const skDoWhile: int = 4;
+    const skLoop: int = 5;
+    const skFor: int = 6;
+    const skMatch: int = 7;
+    const skReturn: int = 8;
+    const skBreak: int = 9;
+    const skContinue: int = 10;
+    const skDecl: int = 11;
+    const skDefer: int = 12;
+    const skSwitch: int = 13;
+
+    struct ElseIf {
+        line: uint32;
+        column: uint32;
+        cond: *Expr;
+        block: *Block;
+    }
+
+    struct Stmt {
+        kind: int,
+        line: uint32,
+        column: uint32,
+        // Common fields
+        strValue: String,        // let name, pattern ident, label, for var
+        boolValue: bool,         // let mutable
+        // Children
+        child1: *Expr,           // init expr, condition, iter expr, return value
+        child2: *Expr,           // match subject
+        child3: *Expr,           // extra
+        refStmtType: *TypeExpr,  // let type annotation
+        refStmtPattern: *Pattern,// let pattern
+        refStmtDecl: *Decl,     // for skDecl
+        refStmtBlock: *Block,    // then/body block
+        refStmtElse: *Block,     // else block
+        // Else-if chain
+        elseIfCount: int,
+        // Linked list
+        nextStmt: *Stmt,
+    }
+
+    // ---------------------------------------------------------------------------
+    // Decl — declarations
+    // ---------------------------------------------------------------------------
+    const dkFunc: int = 0;
+    const dkStruct: int = 1;
+    const dkEnum: int = 2;
+    const dkUnion: int = 3;
+    const dkInterface: int = 4;
+    const dkImpl: int = 5;
+    const dkModule: int = 6;
+    const dkUse: int = 7;
+    const dkConst: int = 8;
+    const dkTypeAlias: int = 9;
+    const dkExternFunc: int = 10;
+    const dkExternVar: int = 11;
+
+    struct Param {
+        line: uint32;
+        column: uint32;
+        name: String;
+        refParamType: *TypeExpr;
+        isVariadic: bool;
+        defaultExpr: *Expr;
+    }
+
+    struct StructField {
+        line: uint32;
+        column: uint32;
+        isPublic: bool;
+        name: String;
+        refFieldType: *TypeExpr;
+    }
+
+    struct EnumVariant {
+        line: uint32;
+        column: uint32;
+        name: String;
+        fieldCount: int;
+        fieldTypeName0: String;
+        fieldTypeName1: String;
+    }
+
+    struct Decl {
+        fieldCount: int,
+        fields: *StructField,
+        kind: int,
+        line: uint32,
+        column: uint32,
+        isPublic: bool,
+        isAsync: bool,
+        isChecked: int,          // @[Checked] attribute (0/1)
+        isDrop: int,             // @[Drop] attribute (0/1)
+        isRelease: int,          // @[Release] attribute (0/1)
+        isConst: int,            // const func (0/1)
+        // Names
+        strValue: String,        // decl name
+        strValue2: String,       // interface name, dll name, module path
+        // Type params (up to 2)
+        typeParam0: String,
+        typeParam1: String,
+        typeParamCount: int,
+        // Trait bounds for type params (e.g. <T: Comparable>)
+        typeParam0Bound: String,
+        typeParam1Bound: String,
+        // Params (for functions)
+        paramCount: int,
+        param0: Param,
+        param1: Param,
+        param2: Param,
+        param3: Param,
+        param4: Param,
+        param5: Param,
+        param6: Param,
+        param7: Param,
+        param8: Param,
+        retType: *TypeExpr,
+        // Body
+        refBody: *Block,
+        // Enum variants (up to 8)
+        variantCount: int,
+        variant0: EnumVariant,
+        variant1: EnumVariant,
+        variant2: EnumVariant,
+        variant3: EnumVariant,
+        variant4: EnumVariant,
+        variant5: EnumVariant,
+        variant6: EnumVariant,
+        variant7: EnumVariant,
+        variant8: EnumVariant,
+        // Impl methods (up to 4)
+        methodCount: int,
+        // Use/import
+        useKind: int,
+        usePath: String,
+        useNames: String,        // joined names for multi-import
+        // Const
+        constType: *TypeExpr,
+        constValue: *Expr,
+        // Type alias
+        aliasType: *TypeExpr,
+        // Extern func
+        extFuncDll: String,
+        extFuncVariadic: bool,
+        extFuncRetType: *TypeExpr,
+        // Children
+        childDecl1: *Decl,       // linked list of decls (for module items, impl methods)
+        childDecl2: *Decl,
+        // Struct fields (up to 256)
+    }
+
+    // ---------------------------------------------------------------------------
+    // Module — AST root
+    // ---------------------------------------------------------------------------
+    struct Module {
+        name: String,
+        path: String,            // path segments joined
+        itemCount: int,
+        firstItem: *Decl,
+    }
+
+    // ---------------------------------------------------------------------------
+    // Constructor helpers
+    // ---------------------------------------------------------------------------
+
+    func Ast_MakeExpr(kind: int, line: uint32, col: uint32) -> Expr {
+        return Expr { kind: kind, line: line, column: col,
+            strValue: "", intValue: 0, boolValue: false,
+            tokKind: 0, tokText: "",
+            child1: null as *Expr, child2: null as *Expr, child3: null as *Expr,
+            refType: null as *TypeExpr, refBlock: null as *Block,
+            genericCallee: "", genericTypeArg0: "", genericTypeArg1: "", genericTypeArgCount: 0,
+            structName: "", structFieldCount: 0,
+            callArgs: null as *ExprList, callArgCount: 0 };
+    }
+
+    func Ast_MakeIdent(name: String, line: uint32, col: uint32) -> Expr {
+        var e: Expr = Ast_MakeExpr(ekIdent, line, col);
+        e.strValue = name;
+        return e;
+    }
+
+    func Ast_MakeLiteral(tokKind: int, text: String, line: uint32, col: uint32) -> Expr {
+        var e: Expr = Ast_MakeExpr(ekLiteral, line, col);
+        e.tokKind = tokKind;
+        e.tokText = text;
+        return e;
+    }
+
+    func Ast_MakeBinary(op: int, left: *Expr, right: *Expr, line: uint32, col: uint32) -> Expr {
+        var e: Expr = Ast_MakeExpr(ekBinary, line, col);
+        e.intValue = op;
+        e.child1 = left;
+        e.child2 = right;
+        return e;
+    }
+
+    func Ast_MakeCall(callee: *Expr, line: uint32, col: uint32) -> Expr {
+        var e: Expr = Ast_MakeExpr(ekCall, line, col);
+        e.child1 = callee;
+        return e;
+    }
+
+    func Ast_MakeStmt(kind: int, line: uint32, col: uint32) -> Stmt {
+        return Stmt { kind: kind, line: line, column: col,
+            strValue: "", boolValue: false,
+            child1: null as *Expr, child2: null as *Expr, child3: null as *Expr,
+            refStmtType: null as *TypeExpr, refStmtPattern: null as *Pattern,
+            refStmtDecl: null as *Decl, refStmtBlock: null as *Block, refStmtElse: null as *Block,
+            elseIfCount: 0 };
+    }
+
+    func Ast_MakeDecl(kind: int, line: uint32, col: uint32) -> Decl {
+        return Decl { kind: kind, line: line, column: col, isPublic: false,
+            isAsync: false, isChecked: 0, isDrop: 0, isRelease: 0, isConst: 0,
+            strValue: "", strValue2: "",
+            typeParam0: "", typeParam1: "", typeParamCount: 0,
+            typeParam0Bound: "", typeParam1Bound: ""
+            ,
+            paramCount: 0,
+            retType: null as *TypeExpr,
+            refBody: null as *Block,
+            fieldCount: 0,
+            variantCount: 0,
+            methodCount: 0,
+            useKind: 0, usePath: "", useNames: "",
+            constType: null as *TypeExpr, constValue: null as *Expr,
+            aliasType: null as *TypeExpr,
+            extFuncDll: "", extFuncVariadic: false, extFuncRetType: null as *TypeExpr,
+            childDecl1: null as *Decl, childDecl2: null as *Decl };
+    }
 }

src/cli.bux

@@ -2,144 +2,144 @@
 // Wires together: Lexer → Parser → Sema → HirLower → CBackend
 module Cli {
 
-extern func PrintLine(s: String);
-extern func Print(s: String);
-extern func bux_read_file(path: String) -> String;
-extern func bux_write_file(path: String, content: String) -> bool;
-extern func bux_file_exists(path: String) -> int;
-extern func bux_dir_exists(path: String) -> int;
-extern func bux_getcwd() -> String;
-extern func bux_path_join(a: String, b: String) -> String;
-extern func bux_path_parent(path: String) -> String;
-extern func bux_mkdir_if_needed(path: String) -> int;
-extern func bux_run_nim(nim_file: String, out_bin: String) -> int;
-extern func bux_list_dir(dir: String, ext: String, out_count: *int) -> *String;
-extern func bux_system(cmd: String) -> int;
-extern func bux_getenv(name: String) -> String;
-extern func bux_setenv(name: String, value: String) -> int;
-extern func bux_strlen(s: String) -> uint;
-extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
+    extern func PrintLine(s: String);
+    extern func Print(s: String);
+    extern func bux_read_file(path: String) -> String;
+    extern func bux_write_file(path: String, content: String) -> bool;
+    extern func bux_file_exists(path: String) -> int;
+    extern func bux_dir_exists(path: String) -> int;
+    extern func bux_getcwd() -> String;
+    extern func bux_path_join(a: String, b: String) -> String;
+    extern func bux_path_parent(path: String) -> String;
+    extern func bux_mkdir_if_needed(path: String) -> int;
+    extern func bux_run_nim(nim_file: String, out_bin: String) -> int;
+    extern func bux_list_dir(dir: String, ext: String, out_count: *int) -> *String;
+    extern func bux_system(cmd: String) -> int;
+    extern func bux_getenv(name: String) -> String;
+    extern func bux_setenv(name: String, value: String) -> int;
+    extern func bux_strlen(s: String) -> uint;
+    extern func bux_str_slice(s: String, start: uint, len: uint) -> String;
 
-func ReadFile(path: String) -> String {
-    return bux_read_file(path);
-}
-
-func WriteFile(path: String, content: String) -> bool {
-    return bux_write_file(path, content);
-}
-
-func FileExists(path: String) -> bool {
-    return bux_file_exists(path) != 0;
-}
-
-func DirExists(path: String) -> bool {
-    return bux_dir_exists(path) != 0;
-}
-
-// ---------------------------------------------------------------------------
-// Diagnostic formatting (Rust-style errors with snippets)
-// ---------------------------------------------------------------------------
-
-struct Diagnostic {
-    message: String;
-    line: uint32;
-    column: uint32;
-    severity: int;
-}
-
-/* Read a single line from a file (1-based). Returns "" on error or EOF. */
-func Diagnostic_GetLine(path: String, lineNum: uint32) -> String {
-    let content: String = bux_read_file(path);
-    if String_Eq(content, "") { return ""; }
-    /* bux_str_split_part uses 0-based index */
-    return bux_str_split_part(content, "\n", lineNum - 1);
-}
-
-/* Simple substring check for help hints */
-func Diagnostic_MsgContains(msg: String, needle: String) -> bool {
-    return bux_str_contains(msg, needle) != 0;
-}
-
-/* Actionable help for common error messages */
-func Diagnostic_Hint(msg: String) -> String {
-    if Diagnostic_MsgContains(msg, "cannot assign") {
-        return "ensure the right-hand side type matches the left-hand side";
+    func ReadFile(path: String) -> String {
+        return bux_read_file(path);
     }
-    if Diagnostic_MsgContains(msg, "undeclared identifier") {
-        return "check the spelling, or import the symbol from the right module";
-    }
-    if Diagnostic_MsgContains(msg, "too few arguments") {
-        return "compare the call with the function's parameter list";
-    }
-    if Diagnostic_MsgContains(msg, "too many arguments") {
-        return "compare the call with the function's parameter list";
-    }
-    if Diagnostic_MsgContains(msg, "use of moved value") {
-        return "the value was moved; clone it or restructure ownership";
-    }
-    if Diagnostic_MsgContains(msg, "expected expression") {
-        return "the previous statement may be incomplete (missing value or ';')";
-    }
-    if Diagnostic_MsgContains(msg, "duplicate symbol") {
-        return "rename one of the definitions or remove the duplicate";
-    }
-    return "";
-}
 
-/* Print a diagnostic in Rust-style format:
- *   error: <message>
- *     --> <path>:<line>:<col>
- *      |
- *   42 | <source_line>
- *      | <spaces>^
- *      = help: <hint>
- */
-func Diagnostic_Print(diag: *Diagnostic, sourcePath: String) {
-    /* Severity prefix */
-    if diag.severity == 0 {
-        Print("error: ");
-    } else if diag.severity == 1 {
-        Print("warning: ");
-    } else {
-        Print("note: ");
+    func WriteFile(path: String, content: String) -> bool {
+        return bux_write_file(path, content);
     }
-    PrintLine(diag.message);
 
-    /* Location header */
-    Print("  --> ");
-    Print(sourcePath);
-    Print(":");
-    PrintInt(diag.line as int64);
-    Print(":");
-    PrintInt(diag.column as int64);
-    PrintLine("");
+    func FileExists(path: String) -> bool {
+        return bux_file_exists(path) != 0;
+    }
 
-    /* Source snippet */
-    let lineText: String = Diagnostic_GetLine(sourcePath, diag.line);
-    if !String_Eq(lineText, "") {
-        let lineNumStr: String = String_FromInt(diag.line as int64);
+    func DirExists(path: String) -> bool {
+        return bux_dir_exists(path) != 0;
+    }
 
-        Print("   |");
-        PrintLine("");
-        Print(" ");
-        Print(lineNumStr);
-        Print(" | ");
-        PrintLine(lineText);
+    // ---------------------------------------------------------------------------
+    // Diagnostic formatting (Rust-style errors with snippets)
+    // ---------------------------------------------------------------------------
 
-        /* Underline (multi-char for identifiers/string tokens) */
-        Print("   | ");
-        var i: uint32 = 0;
-        while i < diag.column - 1 && i < 120 {
-            Print(" ");
-            i = i + 1;
+    struct Diagnostic {
+        message: String;
+        line: uint32;
+        column: uint32;
+        severity: int;
+    }
+
+    /* Read a single line from a file (1-based). Returns "" on error or EOF. */
+    func Diagnostic_GetLine(path: String, lineNum: uint32) -> String {
+        let content: String = bux_read_file(path);
+        if String_Eq(content, "") { return ""; }
+        /* bux_str_split_part uses 0-based index */
+        return bux_str_split_part(content, "\n", lineNum - 1);
+    }
+
+    /* Simple substring check for help hints */
+    func Diagnostic_MsgContains(msg: String, needle: String) -> bool {
+        return bux_str_contains(msg, needle) != 0;
+    }
+
+    /* Actionable help for common error messages */
+    func Diagnostic_Hint(msg: String) -> String {
+        if Diagnostic_MsgContains(msg, "cannot assign") {
+            return "ensure the right-hand side type matches the left-hand side";
         }
-        /* Estimate token length from the source line */
-        var ulen: uint = 1;
-        let col0: uint = diag.column - 1;
-        let lineLen: uint = String_Len(lineText);
-        if col0 < lineLen {
-            let first: String = String_Chars(lineText, col0);
-            if String_Eq(first, "\"") || String_Eq(first, "`") || String_Eq(first, "'") {
+        if Diagnostic_MsgContains(msg, "undeclared identifier") {
+            return "check the spelling, or import the symbol from the right module";
+        }
+        if Diagnostic_MsgContains(msg, "too few arguments") {
+            return "compare the call with the function's parameter list";
+        }
+        if Diagnostic_MsgContains(msg, "too many arguments") {
+            return "compare the call with the function's parameter list";
+        }
+        if Diagnostic_MsgContains(msg, "use of moved value") {
+            return "the value was moved; clone it or restructure ownership";
+        }
+        if Diagnostic_MsgContains(msg, "expected expression") {
+            return "the previous statement may be incomplete (missing value or ';')";
+        }
+        if Diagnostic_MsgContains(msg, "duplicate symbol") {
+            return "rename one of the definitions or remove the duplicate";
+        }
+        return "";
+    }
+
+    /* Print a diagnostic in Rust-style format:
+    *   error: <message>
+    *     --> <path>:<line>:<col>
+    *      |
+    *   42 | <source_line>
+    *      | <spaces>^
+    *      = help: <hint>
+    */
+    func Diagnostic_Print(diag: *Diagnostic, sourcePath: String) {
+        /* Severity prefix */
+        if diag.severity == 0 {
+            Print("error: ");
+        } else if diag.severity == 1 {
+            Print("warning: ");
+        } else {
+            Print("note: ");
+        }
+        PrintLine(diag.message);
+
+        /* Location header */
+        Print("  --> ");
+        Print(sourcePath);
+        Print(":");
+        PrintInt(diag.line as int64);
+        Print(":");
+        PrintInt(diag.column as int64);
+        PrintLine("");
+
+        /* Source snippet */
+        let lineText: String = Diagnostic_GetLine(sourcePath, diag.line);
+        if !String_Eq(lineText, "") {
+            let lineNumStr: String = String_FromInt(diag.line as int64);
+
+            Print("   |");
+            PrintLine("");
+            Print(" ");
+            Print(lineNumStr);
+            Print(" | ");
+            PrintLine(lineText);
+
+            /* Underline (multi-char for identifiers/string tokens) */
+            Print("   | ");
+            var i: uint32 = 0;
+            while i < diag.column - 1 && i < 120 {
+                Print(" ");
+                i = i + 1;
+            }
+            /* Estimate token length from the source line */
+            var ulen: uint = 1;
+            let col0: uint = diag.column - 1;
+            let lineLen: uint = String_Len(lineText);
+            if col0 < lineLen {
+                let first: String = String_Chars(lineText, col0);
+                if String_Eq(first, "\"") || String_Eq(first, "`") || String_Eq(first, "'") {
                 var j: uint = col0 + 1;
                 while j < lineLen {
                     let cj: String = String_Chars(lineText, j);
@@ -922,12 +922,184 @@ func Cli_Fetch() -> int {
 }
 
 // ---------------------------------------------------------------------------
-// Fmt command — format source files
+// Doc command — Markdown from /// comments (D.4)
 // ---------------------------------------------------------------------------
 
-func Cli_Fmt(dir: String) -> int {
-    // If dir is a file, format just that file
+func Cli_DocIsDeclStart(line: String) -> bool {
+    if String_StartsWith(line, "func ") { return true; }
+    if String_StartsWith(line, "pub func ") { return true; }
+    if String_StartsWith(line, "extern func ") { return true; }
+    if String_StartsWith(line, "const func ") { return true; }
+    if String_StartsWith(line, "async func ") { return true; }
+    if String_StartsWith(line, "struct ") { return true; }
+    if String_StartsWith(line, "pub struct ") { return true; }
+    if String_StartsWith(line, "enum ") { return true; }
+    if String_StartsWith(line, "interface ") { return true; }
+    if String_StartsWith(line, "module ") { return true; }
+    if String_StartsWith(line, "type ") { return true; }
+    return false;
+}
+
+func Cli_DocExtractName(line: String) -> String {
+    // Skip leading keywords
+    var s: String = line;
+    if String_StartsWith(s, "pub ") { s = bux_str_slice(s, 4, bux_strlen(s) - 4); }
+    if String_StartsWith(s, "extern ") { s = bux_str_slice(s, 7, bux_strlen(s) - 7); }
+    if String_StartsWith(s, "const ") { s = bux_str_slice(s, 6, bux_strlen(s) - 6); }
+    if String_StartsWith(s, "async ") { s = bux_str_slice(s, 6, bux_strlen(s) - 6); }
+    if String_StartsWith(s, "func ") { s = bux_str_slice(s, 5, bux_strlen(s) - 5); }
+    else if String_StartsWith(s, "struct ") { s = bux_str_slice(s, 7, bux_strlen(s) - 7); }
+    else if String_StartsWith(s, "enum ") { s = bux_str_slice(s, 5, bux_strlen(s) - 5); }
+    else if String_StartsWith(s, "interface ") { s = bux_str_slice(s, 10, bux_strlen(s) - 10); }
+    else if String_StartsWith(s, "module ") { s = bux_str_slice(s, 7, bux_strlen(s) - 7); }
+    else if String_StartsWith(s, "type ") { s = bux_str_slice(s, 5, bux_strlen(s) - 5); }
+    // Take until space, <, (, {, :, ;
+    var i: uint = 0;
+    let n: uint = bux_strlen(s);
+    while i < n {
+        let ch: String = bux_str_slice(s, i, 1);
+        if String_Eq(ch, " ") || String_Eq(ch, "<") || String_Eq(ch, "(") ||
+        String_Eq(ch, "{") || String_Eq(ch, ":") || String_Eq(ch, ";") {
+            break;
+        }
+        i = i + 1;
+    }
+    if i == 0 { return s; }
+    return bux_str_slice(s, 0, i);
+}
+
+func Cli_DocProcessFile(path: String, outSb: *StringBuilder) -> int {
+    let source: String = ReadFile(path);
+    if source == null as String || String_Eq(source, "") { return 0; }
+    var itemCount: int = 0;
+    var pending: String = "";
+    var hasPending: bool = false;
+    let lineCount: uint = bux_str_split_count(source, "\n");
+    // Drop trailing empty split artifact
+    var nLines: uint = lineCount;
+    if nLines > 0 {
+        let last: String = bux_str_split_part(source, "\n", nLines - 1);
+        if String_Eq(last, "") { nLines = nLines - 1; }
+    }
+    var li: uint = 0;
+    var wroteHeader: bool = false;
+    while li < nLines {
+        let raw: String = bux_str_split_part(source, "\n", li);
+        let line: String = String_Trim(raw);
+        if String_StartsWith(line, "///") {
+        var body: String = bux_str_slice(line, 3, bux_strlen(line) - 3);
+        if String_StartsWith(body, " ") {
+            body = bux_str_slice(body, 1, bux_strlen(body) - 1);
+        }
+        if hasPending {
+            pending = String_Concat(pending, String_Concat("\n", body));
+        } else {
+            pending = body;
+            hasPending = true;
+        }
+        li = li + 1;
+        continue;
+    }
+    if String_Eq(line, "") || String_StartsWith(line, "@[") {
+        li = li + 1;
+        continue;
+    }
+    if hasPending && Cli_DocIsDeclStart(line) {
+        if !wroteHeader {
+            StringBuilder_Append(outSb, "## `");
+            StringBuilder_Append(outSb, Cli_FileNameFromPath(path));
+            StringBuilder_Append(outSb, "`\n\n");
+            StringBuilder_Append(outSb, "_Source: `");
+            StringBuilder_Append(outSb, path);
+            StringBuilder_Append(outSb, "`_\n\n");
+            wroteHeader = true;
+        }
+        let name: String = Cli_DocExtractName(line);
+        StringBuilder_Append(outSb, "### `");
+        StringBuilder_Append(outSb, name);
+        StringBuilder_Append(outSb, "`\n\n");
+        StringBuilder_Append(outSb, "```bux\n");
+        StringBuilder_Append(outSb, line);
+        StringBuilder_Append(outSb, "\n```\n\n");
+        StringBuilder_Append(outSb, pending);
+        StringBuilder_Append(outSb, "\n\n");
+        itemCount = itemCount + 1;
+        hasPending = false;
+        pending = "";
+        li = li + 1;
+        continue;
+    }
+    if String_StartsWith(line, "//") {
+    li = li + 1;
+    continue;
+}
+// Other code clears pending
+hasPending = false;
+pending = "";
+li = li + 1;
+}
+return itemCount;
+}
+
+func Cli_Doc(dir: String, outPath: String) -> int {
+    var sb: StringBuilder = StringBuilder_NewCap(16384);
+    StringBuilder_Append(&sb, "# API Reference\n\n");
+    StringBuilder_Append(&sb, "Generated by `bux doc` from `///` documentation comments.\n\n");
+    var total: int = 0;
     if FileExists(dir) {
+        total = total + Cli_DocProcessFile(dir, &sb);
+    } else if DirExists(dir) {
+        var fileCount: int = 0;
+        let files: *String = bux_list_dir(dir, ".bux", &fileCount);
+        var i: int = 0;
+        while i < fileCount {
+            total = total + Cli_DocProcessFile(files[i], &sb);
+            i = i + 1;
+        }
+    } else {
+        Print("Error: path not found: ");
+        PrintLine(dir);
+        StringBuilder_Free(&sb);
+        return 1;
+    }
+    let md: String = StringBuilder_Build(&sb);
+    StringBuilder_Free(&sb);
+    if String_Eq(outPath, "") {
+        Print(md);
+    } else {
+        if !WriteFile(outPath, md) {
+            Print("Error: cannot write ");
+            PrintLine(outPath);
+            return 1;
+        }
+        Print("Wrote ");
+        PrintInt(total as int64);
+        Print(" documented items → ");
+        PrintLine(outPath);
+    }
+    if total == 0 {
+        PrintLine("warning: no /// documented declarations found");
+    }
+    return 0;
+}
+
+// ---------------------------------------------------------------------------
+// Fmt command — format source files (write or --check for CI)
+// ---------------------------------------------------------------------------
+
+func Cli_Fmt(dir: String, checkOnly: bool) -> int {
+    // If dir is a file, format/check just that file
+    if FileExists(dir) {
+        if checkOnly {
+            if Fmt_CheckFile(dir) == 0 {
+                Print("  ok ");
+                PrintLine(dir);
+                return 0;
+            }
+            Print("  would reformat ");
+            PrintLine(dir);
+            return 1;
+        }
         Print("Formatting ");
         PrintLine(dir);
         if Fmt_FormatFile(dir) {
@@ -936,8 +1108,12 @@ func Cli_Fmt(dir: String) -> int {
         }
         return 1;
     }
-    // Otherwise format all .bux files in directory
-    Print("Formatting ");
+    // Otherwise format/check all .bux files in directory
+    if checkOnly {
+        Print("Checking format in ");
+    } else {
+        Print("Formatting ");
+    }
     PrintLine(dir);
     var fileCount: int = 0;
     let files: *String = bux_list_dir(dir, ".bux", &fileCount);
@@ -947,14 +1123,34 @@ func Cli_Fmt(dir: String) -> int {
     }
     var i: int = 0;
     var okCount: int = 0;
+    var changeCount: int = 0;
     while i < fileCount {
-        Print("  ");
-        PrintLine(files[i]);
-        if Fmt_FormatFile(files[i]) {
-            okCount = okCount + 1;
+        if checkOnly {
+            if Fmt_CheckFile(files[i]) == 0 {
+                okCount = okCount + 1;
+            } else {
+                Print("  would reformat ");
+                PrintLine(files[i]);
+                changeCount = changeCount + 1;
+            }
+        } else {
+            Print("  ");
+            PrintLine(files[i]);
+            if Fmt_FormatFile(files[i]) {
+                okCount = okCount + 1;
+            }
         }
         i = i + 1;
     }
+    if checkOnly {
+        Print("fmt --check: ");
+        PrintInt(changeCount as int64);
+        Print(" would reformat, ");
+        PrintInt(okCount as int64);
+        PrintLine(" ok");
+        if changeCount > 0 { return 1; }
+        return 0;
+    }
     Print("Formatted "); PrintInt(okCount as int64); Print("/"); PrintInt(fileCount as int64); PrintLine(" files");
     return 0;
 }
@@ -985,32 +1181,40 @@ func Cli_StripExtension(name: String) -> String {
     return name;
 }
 
-func Cli_Test(projectDir: String) -> int {
+func Cli_Test(projectDir: String, filter: String) -> int {
     Print("Testing project: ");
     PrintLine(projectDir);
-    // Build and run the project's own Main first
-    let mainRc: int = Cli_BuildProject(projectDir, "", false);
-    if mainRc != 0 {
-        PrintLine("Main test build failed");
-        return mainRc;
+    if !String_Eq(filter, "") {
+        Print("Filter: ");
+        PrintLine(filter);
     }
-    let man: Manifest = Manifest_Load(bux_path_join(projectDir, "bux.toml"));
-    var mainName: String = man.name;
-    if String_Eq(mainName, "") { mainName = "bux_out"; }
-    let mainBin: String = bux_path_join(bux_path_join(projectDir, "build"), mainName);
-    if !FileExists(mainBin) {
-        Print("Error: test binary not found: ");
-        PrintLine(mainBin);
-        return 1;
+
+    // Without --filter, build and run the project's own Main first.
+    // With --filter, only run matching tests/*.bux files.
+    if String_Eq(filter, "") {
+        let mainRc: int = Cli_BuildProject(projectDir, "", false);
+        if mainRc != 0 {
+            PrintLine("Main test build failed");
+            return mainRc;
+        }
+        let man: Manifest = Manifest_Load(bux_path_join(projectDir, "bux.toml"));
+        var mainName: String = man.name;
+        if String_Eq(mainName, "") { mainName = "bux_out"; }
+        let mainBin: String = bux_path_join(bux_path_join(projectDir, "build"), mainName);
+        if !FileExists(mainBin) {
+            Print("Error: test binary not found: ");
+            PrintLine(mainBin);
+            return 1;
+        }
+        let mainResult: int = bux_system(mainBin);
+        if mainResult != 0 {
+            Print("Main tests failed (exit code ");
+            PrintInt(mainResult as int64);
+            PrintLine(")");
+            return mainResult;
+        }
+        PrintLine("Main tests passed");
     }
-    let mainResult: int = bux_system(mainBin);
-    if mainResult != 0 {
-        Print("Main tests failed (exit code ");
-        PrintInt(mainResult as int64);
-        PrintLine(")");
-        return mainResult;
-    }
-    PrintLine("Main tests passed");
 
     // Propagate the project's stdlib to temp test packages.
     let stdlibDir: String = Cli_FindStdlibDir(projectDir);
@@ -1031,15 +1235,31 @@ func Cli_Test(projectDir: String) -> int {
         return 0;
     }
 
+    PrintLine("┌──────────────────────────────┬────────┐");
+    PrintLine("│ Test                         │ Status │");
+    PrintLine("├──────────────────────────────┼────────┤");
+
     var passed: int = 0;
     var failed: int = 0;
+    var skipped: int = 0;
     var i: int = 0;
     while i < testCount {
         let testPath: String = testFiles[i];
         let fileName: String = Cli_FileNameFromPath(testPath);
         let testName: String = Cli_StripExtension(fileName);
-        Print("  Test: ");
+
+        // --filter: only run tests whose name contains the filter substring
+        if !String_Eq(filter, "") {
+            if !String_Contains(testName, filter) {
+                skipped = skipped + 1;
+                i = i + 1;
+                continue;
+            }
+        }
+
+        Print("│ ");
         Print(testName);
+        // Pad status column roughly (name may be long)
         Print(" ... ");
 
         // Create temp package for this test file
@@ -1050,14 +1270,14 @@ func Cli_Test(projectDir: String) -> int {
 
         let source: String = ReadFile(testPath);
         if String_Eq(source, "") {
-            PrintLine("FAIL (cannot read test file)");
+            PrintLine("FAIL │");
             failed = failed + 1;
             i = i + 1;
             continue;
         }
         let tmpMain: String = bux_path_join(tmpSrc, "Main.bux");
         if !WriteFile(tmpMain, source) {
-            PrintLine("FAIL (cannot write temp Main.bux)");
+            PrintLine("FAIL │");
             failed = failed + 1;
             i = i + 1;
             continue;
@@ -1066,7 +1286,7 @@ func Cli_Test(projectDir: String) -> int {
         let tmpToml: String = bux_path_join(tmpDir, "bux.toml");
         var tomlContent: String = "[Package]\nName    = \"_test_tmp\"\nVersion = \"0.1.0\"\nType    = \"bin\"\n\n[Build]\nOutput = \"Bin\"\n";
         if !WriteFile(tmpToml, tomlContent) {
-            PrintLine("FAIL (cannot write temp bux.toml)");
+            PrintLine("FAIL │");
             failed = failed + 1;
             i = i + 1;
             continue;
@@ -1091,36 +1311,48 @@ func Cli_Test(projectDir: String) -> int {
 
         let buildRc: int = Cli_BuildProject(tmpDir, "", false);
         if buildRc != 0 {
-            PrintLine("FAIL (build error)");
+            PrintLine("FAIL │");
             failed = failed + 1;
             i = i + 1;
             continue;
         }
         let testBin: String = bux_path_join(bux_path_join(tmpDir, "build"), "_test_tmp");
         if !FileExists(testBin) {
-            PrintLine("FAIL (test binary not found)");
+            PrintLine("FAIL │");
             failed = failed + 1;
             i = i + 1;
             continue;
         }
         let runRc: int = bux_system(testBin);
         if runRc == 0 {
-            PrintLine("PASS");
+            PrintLine("PASS │");
             passed = passed + 1;
         } else {
-            Print("FAIL (exit ");
-            PrintInt(runRc as int64);
-            PrintLine(")");
+            Print("FAIL │");
+            PrintLine("");
             failed = failed + 1;
         }
         i = i + 1;
     }
 
-    Print("Tests: ");
+    PrintLine("└──────────────────────────────┴────────┘");
+    Print("Results: ");
     PrintInt(passed as int64);
     Print(" passed, ");
     PrintInt(failed as int64);
-    PrintLine(" failed");
+    Print(" failed");
+    if skipped > 0 {
+        Print(", ");
+        PrintInt(skipped as int64);
+        Print(" skipped");
+    }
+    PrintLine("");
+    if !String_Eq(filter, "") && passed == 0 && failed == 0 {
+        Print("No tests matching filter '");
+        Print(filter);
+        PrintLine("'");
+        return 1;
+    }
     if failed > 0 { return 1; }
     return 0;
 }
@@ -1493,7 +1725,10 @@ func Cli_Run(args: *String, argCount: int) -> int {
     if argCount < 2 {
         PrintLine("Bux Self-Hosting Compiler v0.2.0");
         PrintLine("Usage: buxc <command> [args]");
-        PrintLine("Commands: build, check, new, init, add, remove, fetch, fmt, test, run, project, help, version");
+        PrintLine("Commands: build, check, new, init, add, remove, fetch, fmt, doc, test, run, project, help, version");
+        PrintLine("  test --filter <name>   Only run tests/*.bux whose name contains <name>");
+        PrintLine("  fmt  --check [path]    Exit 1 if any file would be reformatted (CI)");
+        PrintLine("  doc  --out file.md [path]  API docs from /// comments");
         return 0;
     }
 
@@ -1506,14 +1741,16 @@ func Cli_Run(args: *String, argCount: int) -> int {
     if String_Eq(cmd, "help") || String_Eq(cmd, "--help") || String_Eq(cmd, "-h") {
         PrintLine("Bux Self-Hosting Compiler v0.2.0");
         PrintLine("Usage: buxc <command> [args]");
-        PrintLine("Commands: build, check, new, init, add, remove, fetch, fmt, test, run, project, help, version");
+        PrintLine("Commands: build, check, new, init, add, remove, fetch, fmt, doc, test, run, project, help, version");
+        PrintLine("  test --filter <name>   Only run tests/*.bux whose name contains <name>");
+        PrintLine("  fmt  --check [path]    Exit 1 if any file would be reformatted (CI)");
+        PrintLine("  doc  --out file.md [path]  API docs from /// comments");
         PrintLine("Pipeline modules:");
-        PrintLine("  Lexer      ✅  695 lines");
-        PrintLine("  Parser     ✅ 1004 lines");
-        PrintLine("  Sema       ✅  393 lines");
-        PrintLine("  HirLower   ✅  307 lines");
-        PrintLine("  CBackend   ✅  585 lines");
-        PrintLine("  Total: 3830 lines of Bux");
+        PrintLine("  Lexer      ✅");
+        PrintLine("  Parser     ✅");
+        PrintLine("  Sema       ✅");
+        PrintLine("  HirLower   ✅");
+        PrintLine("  CBackend   ✅");
         return 0;
     }
 
@@ -1550,9 +1787,36 @@ func Cli_Run(args: *String, argCount: int) -> int {
     }
 
     if String_Eq(cmd, "fmt") {
-        let dir: String = ".";
-        if argCount >= 3 { dir = args[2]; }
-        return Cli_Fmt(dir);
+        var dir: String = ".";
+        var checkOnly: bool = false;
+        var fi: int = 2;
+        while fi < argCount {
+            if String_Eq(args[fi], "--check") {
+                checkOnly = true;
+            } else {
+                dir = args[fi];
+            }
+            fi = fi + 1;
+        }
+        return Cli_Fmt(dir, checkOnly);
+    }
+
+    if String_Eq(cmd, "doc") {
+        var dir: String = "lib";
+        var outPath: String = "";
+        var di: int = 2;
+        while di < argCount {
+            if String_Eq(args[di], "--out") && di + 1 < argCount {
+                outPath = args[di + 1];
+                di = di + 1;
+            } else if String_StartsWith(args[di], "--out=") {
+                outPath = bux_str_slice(args[di], 6, bux_strlen(args[di]) - 6);
+            } else if !String_StartsWith(args[di], "-") {
+                dir = args[di];
+            }
+            di = di + 1;
+        }
+        return Cli_Doc(dir, outPath);
     }
 
     if String_Eq(cmd, "check") {
@@ -1578,9 +1842,22 @@ func Cli_Run(args: *String, argCount: int) -> int {
     }
 
     if String_Eq(cmd, "test") {
-        let dir: String = ".";
-        if argCount >= 3 { dir = args[2]; }
-        return Cli_Test(dir);
+        var dir: String = ".";
+        var filter: String = "";
+        var ti: int = 2;
+        while ti < argCount {
+            if String_Eq(args[ti], "--filter") && ti + 1 < argCount {
+                filter = args[ti + 1];
+                ti = ti + 1;
+            } else if String_StartsWith(args[ti], "--filter=") {
+                // --filter=name form
+                filter = bux_str_slice(args[ti], 9, bux_strlen(args[ti]) - 9);
+            } else if !String_StartsWith(args[ti], "-") {
+                dir = args[ti];
+            }
+            ti = ti + 1;
+        }
+        return Cli_Test(dir, filter);
     }
 
     if String_Eq(cmd, "run") {

src/fmt.bux

@@ -1,138 +1,168 @@
 // fmt.bux — Bux source code formatter (indentation-based, preserves line structure)
 module Fmt {
 
-extern func bux_read_file(path: String) -> String;
-extern func bux_write_file(path: String, content: String) -> bool;
-extern func bux_strlen(s: String) -> uint;
+    extern func bux_read_file(path: String) -> String;
+    extern func bux_write_file(path: String, content: String) -> bool;
+    extern func bux_strlen(s: String) -> uint;
 
-// Count leading spaces on a line
-func Fmt_CountLeadingSpaces(line: String) -> int {
-    var count: int = 0;
-    while count < 256 {
-        let c: int = line[count] as int;
-        if c == 0 { break; }
-        if c != 32 { break; } // space
-        count = count + 1;
-    }
-    return count;
-}
-
-// Skip whitespace from start of line, return rest
-func Fmt_TrimLeft(line: String) -> String {
-    var i: int = 0;
-    while i < 256 {
-        let c: int = line[i] as int;
-        if c == 0 { break; }
-        if c != 32 && c != 9 { break; }
-        i = i + 1;
-    }
-    if i == 0 { return line; }
-    // Extract substring from i
-    var len: int = 0;
-    while len < 256 {
-        let c: int = line[len] as int;
-        if c == 0 { break; }
-        len = len + 1;
-    }
-    if i >= len { return ""; }
-    return bux_str_slice(line, i as uint, (len - i) as uint);
-}
-
-// Check if char at position is inside a string or comment (simplified)
-func Fmt_IsInStringOrComment(line: String, pos: int) -> bool {
-    var inString: bool = false;
-    var inChar: bool = false;
-    var inComment: bool = false;
-    var i: int = 0;
-    while i < pos {
-        let c: int = line[i] as int;
-        let n: int = 0;
-        if i + 1 < 256 { n = line[i + 1] as int; }
-        if inComment { i = i + 1; continue; }
-        if c == 47 && n == 47 { inComment = true; i = i + 1; continue; } // //
-        if c == 34 && !inChar { inString = !inString; }
-        if c == 39 && !inString { inChar = !inChar; }
-        i = i + 1;
-    }
-    return inString || inChar || inComment;
-}
-
-// Count brace depth change on a line, skipping strings/comments
-func Fmt_CountBraceDelta(line: String) -> int {
-    var delta: int = 0;
-    var i: int = 0;
-    while i < 256 {
-        let c: int = line[i] as int;
-        if c == 0 { break; }
-        if !Fmt_IsInStringOrComment(line, i) {
-            if c == 123 { delta = delta + 1; } // {
-            if c == 125 { delta = delta - 1; } // }
+    // Count leading spaces on a line
+    func Fmt_CountLeadingSpaces(line: String) -> int {
+        var count: int = 0;
+        while count < 256 {
+            let c: int = line[count] as int;
+            if c == 0 { break; }
+            if c != 32 { break; } // space
+            count = count + 1;
         }
-        i = i + 1;
+        return count;
     }
-    return delta;
-}
 
-func Fmt_FormatSource(source: String) -> String {
-    let sb: StringBuilder = StringBuilder_NewCap(8192);
-    var indent: int = 0;
-    var i: uint = 0;
-    let lineCount: uint = bux_str_split_count(source, "\n");
-
-    while i < lineCount {
-        let line: String = bux_str_split_part(source, "\n", i);
-        let trimmed: String = Fmt_TrimLeft(line);
-
-        // Skip empty lines
-        if String_Eq(trimmed, "") {
-            StringBuilder_Append(&sb, "\n");
+    // Skip whitespace from start of line, return rest
+    func Fmt_TrimLeft(line: String) -> String {
+        var i: int = 0;
+        while i < 256 {
+            let c: int = line[i] as int;
+            if c == 0 { break; }
+            if c != 32 && c != 9 { break; }
             i = i + 1;
-            continue;
         }
-
-        // Adjust indent for closing braces on this line
-        let delta: int = Fmt_CountBraceDelta(trimmed);
-        // If line starts with }, decrease indent before emitting
-        let firstChar: int = trimmed[0] as int;
-        if firstChar == 125 { // }
-            indent = indent - 1;
-            if indent < 0 { indent = 0; }
+        if i == 0 { return line; }
+        // Extract substring from i
+        var len: int = 0;
+        while len < 256 {
+            let c: int = line[len] as int;
+            if c == 0 { break; }
+            len = len + 1;
         }
-
-        // Emit indentation
-        var si: int = 0;
-        while si < indent {
-            StringBuilder_Append(&sb, "    ");
-            si = si + 1;
-        }
-
-        // Emit the trimmed line
-        StringBuilder_Append(&sb, trimmed);
-        StringBuilder_Append(&sb, "\n");
-
-        // Adjust indent for opening braces
-        if firstChar != 125 {
-            indent = indent + delta;
-        } else {
-            // For lines starting with }, apply the net delta after the initial decrease
-            indent = indent + delta + 1;
-            if indent < 0 { indent = 0; }
-        }
-
-        i = i + 1;
+        if i >= len { return ""; }
+        return bux_str_slice(line, i as uint, (len - i) as uint);
     }
 
-    let result: String = StringBuilder_Build(&sb);
-    StringBuilder_Free(&sb);
-    return result;
-}
+    // Check if char at position is inside a string or comment (simplified)
+    func Fmt_IsInStringOrComment(line: String, pos: int) -> bool {
+        var inString: bool = false;
+        var inChar: bool = false;
+        var inComment: bool = false;
+        var i: int = 0;
+        while i < pos {
+            let c: int = line[i] as int;
+            let n: int = 0;
+            if i + 1 < 256 { n = line[i + 1] as int; }
+            if inComment { i = i + 1; continue; }
+            if c == 47 && n == 47 { inComment = true; i = i + 1; continue; } // //
+            if c == 34 && !inChar { inString = !inString; }
+            if c == 39 && !inString { inChar = !inChar; }
+            i = i + 1;
+        }
+        return inString || inChar || inComment;
+    }
 
-func Fmt_FormatFile(path: String) -> bool {
-    let source: String = bux_read_file(path);
-    if source == null as String || String_Eq(source, "") { return false; }
-    let formatted: String = Fmt_FormatSource(source);
-    if String_Eq(formatted, "") { return false; }
-    return bux_write_file(path, formatted);
-}
+    // Count brace depth change on a line, skipping strings/comments
+    func Fmt_CountBraceDelta(line: String) -> int {
+        var delta: int = 0;
+        var i: int = 0;
+        while i < 256 {
+            let c: int = line[i] as int;
+            if c == 0 { break; }
+            if !Fmt_IsInStringOrComment(line, i) {
+                if c == 123 { delta = delta + 1; } // {
+                if c == 125 { delta = delta - 1; } // }
+            }
+            i = i + 1;
+        }
+        return delta;
+    }
+
+    func Fmt_FormatSource(source: String) -> String {
+        let sb: StringBuilder = StringBuilder_NewCap(8192);
+        var indent: int = 0;
+        var i: uint = 0;
+        var lineCount: uint = bux_str_split_count(source, "\n");
+
+        // Trailing "\n" yields a final empty part (split artifact). Drop it so
+        // re-formatting is idempotent and does not accumulate blank lines.
+        if lineCount > 0 {
+            let last: String = bux_str_split_part(source, "\n", lineCount - 1);
+            if String_Eq(last, "") {
+                lineCount = lineCount - 1;
+            }
+        }
+
+        while i < lineCount {
+            let line: String = bux_str_split_part(source, "\n", i);
+            let trimmed: String = Fmt_TrimLeft(line);
+
+            // Empty line (intentional blank) — keep a single newline
+            if String_Eq(trimmed, "") {
+                StringBuilder_Append(&sb, "\n");
+                i = i + 1;
+                continue;
+            }
+
+            // Adjust indent for closing braces on this line
+            let delta: int = Fmt_CountBraceDelta(trimmed);
+            // If line starts with }, decrease indent before emitting
+            let firstChar: int = trimmed[0] as int;
+            if firstChar == 125 { // }
+                indent = indent - 1;
+                if indent < 0 { indent = 0; }
+            }
+
+            // Emit indentation
+            var si: int = 0;
+            while si < indent {
+                StringBuilder_Append(&sb, "    ");
+                si = si + 1;
+            }
+
+            // Emit the trimmed line
+            StringBuilder_Append(&sb, trimmed);
+            StringBuilder_Append(&sb, "\n");
+
+            // Adjust indent for opening braces
+            if firstChar != 125 {
+                indent = indent + delta;
+            } else {
+                // For lines starting with }, apply the net delta after the initial decrease
+                indent = indent + delta + 1;
+                if indent < 0 { indent = 0; }
+            }
+
+            i = i + 1;
+        }
+
+        let result: String = StringBuilder_Build(&sb);
+        StringBuilder_Free(&sb);
+        return result;
+    }
+
+    func Fmt_FormatFile(path: String) -> bool {
+        let source: String = bux_read_file(path);
+        if source == null as String || String_Eq(source, "") { return false; }
+        let formatted: String = Fmt_FormatSource(source);
+        if String_Eq(formatted, "") { return false; }
+        return bux_write_file(path, formatted);
+    }
+
+    // Returns true if formatting would change the file (CI --check).
+    func Fmt_WouldChange(path: String) -> bool {
+        let source: String = bux_read_file(path);
+        if source == null as String { return false; }
+        let formatted: String = Fmt_FormatSource(source);
+        return !String_Eq(formatted, source);
+    }
+
+    // Check a file without writing. Returns 0 if clean, 1 if would reformat / error.
+    func Fmt_CheckFile(path: String) -> int {
+        let source: String = bux_read_file(path);
+        if source == null as String {
+            return 1;
+        }
+        let formatted: String = Fmt_FormatSource(source);
+        if String_Eq(formatted, source) {
+            return 0;
+        }
+        return 1;
+    }
 
 }

src/hir.bux

@@ -1,256 +1,256 @@
 // hir.bux — HIR (High-level Intermediate Representation) node types
 module Hir {
 
-// HIR node kinds
-const hLit: int = 0;
-const hVar: int = 1;
-const hSelf: int = 2;
-const hUnary: int = 3;
-const hBinary: int = 4;
-const hAssign: int = 5;
-const hIf: int = 6;
-const hWhile: int = 7;
-const hLoop: int = 8;
-const hBreak: int = 9;
-const hContinue: int = 10;
-const hReturn: int = 11;
-const hAlloca: int = 12;
-const hLoad: int = 13;
-const hStore: int = 14;
-const hFieldPtr: int = 15;
-const hFieldAccess: int = 16;
-const hArrowField: int = 17;
-const hIndexPtr: int = 18;
-const hCall: int = 32;
-const hCallIndirect: int = 33;
-const hCast: int = 34;
-const hIs: int = 35;
-const hSizeOf: int = 36;
-const hBlock: int = 37;
-const hStructInit: int = 38;
-const hSliceInit: int = 39;
-const hRange: int = 40;
-const hTupleInit: int = 41;
-const hMatch: int = 42;
-const hSpawn: int = 43;
-const hAwait: int = 44;
-const hDefer: int = 45;
+    // HIR node kinds
+    const hLit: int = 0;
+    const hVar: int = 1;
+    const hSelf: int = 2;
+    const hUnary: int = 3;
+    const hBinary: int = 4;
+    const hAssign: int = 5;
+    const hIf: int = 6;
+    const hWhile: int = 7;
+    const hLoop: int = 8;
+    const hBreak: int = 9;
+    const hContinue: int = 10;
+    const hReturn: int = 11;
+    const hAlloca: int = 12;
+    const hLoad: int = 13;
+    const hStore: int = 14;
+    const hFieldPtr: int = 15;
+    const hFieldAccess: int = 16;
+    const hArrowField: int = 17;
+    const hIndexPtr: int = 18;
+    const hCall: int = 32;
+    const hCallIndirect: int = 33;
+    const hCast: int = 34;
+    const hIs: int = 35;
+    const hSizeOf: int = 36;
+    const hBlock: int = 37;
+    const hStructInit: int = 38;
+    const hSliceInit: int = 39;
+    const hRange: int = 40;
+    const hTupleInit: int = 41;
+    const hMatch: int = 42;
+    const hSpawn: int = 43;
+    const hAwait: int = 44;
+    const hDefer: int = 45;
 
-// ---------------------------------------------------------------------------
-// HirArgList — linked list for call arguments beyond 2
-// ---------------------------------------------------------------------------
+    // ---------------------------------------------------------------------------
+    // HirArgList — linked list for call arguments beyond 2
+    // ---------------------------------------------------------------------------
 
-struct HirArgList {
-    node: *HirNode,
-    next: *HirArgList,
-}
-
-// ---------------------------------------------------------------------------
-// HirNode — unified struct with tagged union pattern
-// ---------------------------------------------------------------------------
-
-struct HirNode {
-    kind: int;
-    line: uint32;
-    column: uint32;
-    typeKind: int;
-    typeName: String;
-    // Common fields (used by multiple kinds)
-    strValue: String;       // var name; callee name; field name; label
-    intValue: int;          // token kind (for lit; unary op; binary op)
-    boolValue: bool;        // range inclusive; isScope
-    // Child nodes (up to 3)
-    child1: *HirNode;       // left/operand/condition/base
-    child2: *HirNode;       // right/value/then/body
-    child3: *HirNode;       // else/third
-    // Extra data pointer (for children arrays, field lists, etc.)
-    extraData: *void;
-    extraCount: int;
-}
-
-// ---------------------------------------------------------------------------
-// HirFunc
-// ---------------------------------------------------------------------------
-
-struct HirParam {
-    name: String;
-    typeKind: int;
-    typeName: String;
-}
-
-struct HirFunc {
-    name: String;
-    paramCount: int;
-    param0: *HirParam;
-    param1: *HirParam;
-    param2: *HirParam;
-    param3: *HirParam;
-    param4: *HirParam;
-    param5: *HirParam;
-    param6: *HirParam;
-    param7: *HirParam;
-    param8: *HirParam;
-    retTypeKind: int;
-    retTypeName: String;
-    body: *HirNode;
-    isPublic: bool;
-    // Closure capture metadata
-    captureCount: int;
-    captureName0: String;
-    captureName1: String;
-    captureName2: String;
-    captureName3: String;
-    captureName4: String;
-    captureName5: String;
-    captureName6: String;
-    captureName7: String;
-    captureType0: int;
-    captureType1: int;
-    captureType2: int;
-    captureType3: int;
-    captureType4: int;
-    captureType5: int;
-    captureType6: int;
-    captureType7: int;
-    envStructName: String;
-    envInstanceName: String;
-    checkedFunc: bool;
-}
-
-// ---------------------------------------------------------------------------
-// HirEnumVariant
-// ---------------------------------------------------------------------------
-
-struct HirEnumVariant {
-    name: String;
-    fieldCount: int;
-    fieldType0: int;
-    fieldName0: String;
-    fieldTypeName0: String;  // C type name (e.g. "int", "Tuple_int_int")
-    fieldType1: int;
-    fieldName1: String;
-    fieldTypeName1: String;
-}
-
-// ---------------------------------------------------------------------------
-// HirModule
-// ---------------------------------------------------------------------------
-
-struct HirStructField {
-    name: String;
-    typeName: String;
-}
-
-struct HirStruct {
-    name: String;
-    fieldCount: int;
-    fields: *HirStructField;
-}
-
-struct HirConst {
-    name: String;
-    value: int;
-}
-
-struct HirEnum {
-    name: String;
-    variantCount: int;
-    variants: *HirEnumVariant;
-}
-
-struct HirModule {
-    funcCount: int;
-    funcs: *HirFunc;
-    externCount: int;
-    externFuncs: *HirFunc;
-    structCount: int;
-    structs: *HirStruct;
-    enumCount: int;
-    enums: *HirEnum;
-    constCount: int;
-    consts: *HirConst;
-}
-
-// ---------------------------------------------------------------------------
-// Constructor helpers
-// ---------------------------------------------------------------------------
-
-func Hir_MakeNode(kind: int, line: uint32, column: uint32) -> HirNode {
-    return HirNode { kind: kind, line: line, column: column,
-        typeKind: 0, typeName: "",
-        strValue: "", intValue: 0, boolValue: false,
-        child1: null as *HirNode, child2: null as *HirNode, child3: null as *HirNode,
-        extraData: null as *void, extraCount: 0 };
-}
-
-func Hir_MakeLit(tokKind: int, tokText: String, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hLit, line, col);
-    n.intValue = tokKind;
-    n.strValue = tokText;
-    return n;
-}
-
-func Hir_MakeVar(name: String, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hVar, line, col);
-    n.strValue = name;
-    return n;
-}
-
-func Hir_MakeBinary(op: int, left: *HirNode, right: *HirNode, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hBinary, line, col);
-    n.intValue = op;
-    n.child1 = left;
-    n.child2 = right;
-    return n;
-}
-
-func Hir_MakeCall(callee: String, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hCall, line, col);
-    n.strValue = callee;
-    return n;
-}
-
-func Hir_MakeReturn(value: *HirNode, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hReturn, line, col);
-    n.child1 = value;
-    return n;
-}
-
-func Hir_MakeBlock(line: uint32, col: uint32) -> HirNode {
-    return Hir_MakeNode(hBlock, line, col);
-}
-
-func Hir_MakeIf(cond: *HirNode, thenBody: *HirNode, elseBody: *HirNode, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hIf, line, col);
-    n.child1 = cond;
-    n.child2 = thenBody;
-    n.child3 = elseBody;
-    return n;
-}
-
-func Hir_MakeWhile(cond: *HirNode, body: *HirNode, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hWhile, line, col);
-    n.child1 = cond;
-    n.child2 = body;
-    return n;
-}
-
-func Hir_MakeAlloca(name: String, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hAlloca, line, col);
-    n.strValue = name;
-    return n;
-}
-
-func Hir_MakeLoad(ptr: *HirNode, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hLoad, line, col);
-    n.child1 = ptr;
-    return n;
-}
-
-func Hir_MakeStore(ptr: *HirNode, value: *HirNode, line: uint32, col: uint32) -> HirNode {
-    var n: HirNode = Hir_MakeNode(hStore, line, col);
-    n.child1 = ptr;
-    n.child2 = value;
-    return n;
-}
+    struct HirArgList {
+        node: *HirNode,
+        next: *HirArgList,
+    }
+
+    // ---------------------------------------------------------------------------
+    // HirNode — unified struct with tagged union pattern
+    // ---------------------------------------------------------------------------
+
+    struct HirNode {
+        kind: int;
+        line: uint32;
+        column: uint32;
+        typeKind: int;
+        typeName: String;
+        // Common fields (used by multiple kinds)
+        strValue: String;       // var name; callee name; field name; label
+        intValue: int;          // token kind (for lit; unary op; binary op)
+        boolValue: bool;        // range inclusive; isScope
+        // Child nodes (up to 3)
+        child1: *HirNode;       // left/operand/condition/base
+        child2: *HirNode;       // right/value/then/body
+        child3: *HirNode;       // else/third
+        // Extra data pointer (for children arrays, field lists, etc.)
+        extraData: *void;
+        extraCount: int;
+    }
+
+    // ---------------------------------------------------------------------------
+    // HirFunc
+    // ---------------------------------------------------------------------------
+
+    struct HirParam {
+        name: String;
+        typeKind: int;
+        typeName: String;
+    }
+
+    struct HirFunc {
+        name: String;
+        paramCount: int;
+        param0: *HirParam;
+        param1: *HirParam;
+        param2: *HirParam;
+        param3: *HirParam;
+        param4: *HirParam;
+        param5: *HirParam;
+        param6: *HirParam;
+        param7: *HirParam;
+        param8: *HirParam;
+        retTypeKind: int;
+        retTypeName: String;
+        body: *HirNode;
+        isPublic: bool;
+        // Closure capture metadata
+        captureCount: int;
+        captureName0: String;
+        captureName1: String;
+        captureName2: String;
+        captureName3: String;
+        captureName4: String;
+        captureName5: String;
+        captureName6: String;
+        captureName7: String;
+        captureType0: int;
+        captureType1: int;
+        captureType2: int;
+        captureType3: int;
+        captureType4: int;
+        captureType5: int;
+        captureType6: int;
+        captureType7: int;
+        envStructName: String;
+        envInstanceName: String;
+        checkedFunc: bool;
+    }
+
+    // ---------------------------------------------------------------------------
+    // HirEnumVariant
+    // ---------------------------------------------------------------------------
+
+    struct HirEnumVariant {
+        name: String;
+        fieldCount: int;
+        fieldType0: int;
+        fieldName0: String;
+        fieldTypeName0: String;  // C type name (e.g. "int", "Tuple_int_int")
+        fieldType1: int;
+        fieldName1: String;
+        fieldTypeName1: String;
+    }
+
+    // ---------------------------------------------------------------------------
+    // HirModule
+    // ---------------------------------------------------------------------------
+
+    struct HirStructField {
+        name: String;
+        typeName: String;
+    }
+
+    struct HirStruct {
+        name: String;
+        fieldCount: int;
+        fields: *HirStructField;
+    }
+
+    struct HirConst {
+        name: String;
+        value: int;
+    }
+
+    struct HirEnum {
+        name: String;
+        variantCount: int;
+        variants: *HirEnumVariant;
+    }
+
+    struct HirModule {
+        funcCount: int;
+        funcs: *HirFunc;
+        externCount: int;
+        externFuncs: *HirFunc;
+        structCount: int;
+        structs: *HirStruct;
+        enumCount: int;
+        enums: *HirEnum;
+        constCount: int;
+        consts: *HirConst;
+    }
+
+    // ---------------------------------------------------------------------------
+    // Constructor helpers
+    // ---------------------------------------------------------------------------
+
+    func Hir_MakeNode(kind: int, line: uint32, column: uint32) -> HirNode {
+        return HirNode { kind: kind, line: line, column: column,
+            typeKind: 0, typeName: "",
+            strValue: "", intValue: 0, boolValue: false,
+            child1: null as *HirNode, child2: null as *HirNode, child3: null as *HirNode,
+            extraData: null as *void, extraCount: 0 };
+    }
+
+    func Hir_MakeLit(tokKind: int, tokText: String, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hLit, line, col);
+        n.intValue = tokKind;
+        n.strValue = tokText;
+        return n;
+    }
+
+    func Hir_MakeVar(name: String, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hVar, line, col);
+        n.strValue = name;
+        return n;
+    }
+
+    func Hir_MakeBinary(op: int, left: *HirNode, right: *HirNode, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hBinary, line, col);
+        n.intValue = op;
+        n.child1 = left;
+        n.child2 = right;
+        return n;
+    }
+
+    func Hir_MakeCall(callee: String, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hCall, line, col);
+        n.strValue = callee;
+        return n;
+    }
+
+    func Hir_MakeReturn(value: *HirNode, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hReturn, line, col);
+        n.child1 = value;
+        return n;
+    }
+
+    func Hir_MakeBlock(line: uint32, col: uint32) -> HirNode {
+        return Hir_MakeNode(hBlock, line, col);
+    }
+
+    func Hir_MakeIf(cond: *HirNode, thenBody: *HirNode, elseBody: *HirNode, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hIf, line, col);
+        n.child1 = cond;
+        n.child2 = thenBody;
+        n.child3 = elseBody;
+        return n;
+    }
+
+    func Hir_MakeWhile(cond: *HirNode, body: *HirNode, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hWhile, line, col);
+        n.child1 = cond;
+        n.child2 = body;
+        return n;
+    }
+
+    func Hir_MakeAlloca(name: String, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hAlloca, line, col);
+        n.strValue = name;
+        return n;
+    }
+
+    func Hir_MakeLoad(ptr: *HirNode, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hLoad, line, col);
+        n.child1 = ptr;
+        return n;
+    }
+
+    func Hir_MakeStore(ptr: *HirNode, value: *HirNode, line: uint32, col: uint32) -> HirNode {
+        var n: HirNode = Hir_MakeNode(hStore, line, col);
+        n.child1 = ptr;
+        n.child2 = value;
+        return n;
+    }
 }

src/manifest.bux

@@ -2,224 +2,137 @@
 // Parses package metadata: name, version, type, build output.
 module Manifest {
 
-extern func bux_strlen(s: String) -> uint;
+    extern func bux_strlen(s: String) -> uint;
 
-// ---------------------------------------------------------------------------
-// Manifest struct
-// ---------------------------------------------------------------------------
-struct Manifest {
-    name: String;
-    version: String;
-    pkgType: String;
-    output: String;
-    depCount: int;
-    depName0: String;
-    depUrl0: String;
-    depName1: String;
-    depUrl1: String;
-    depName2: String;
-    depUrl2: String;
-    depName3: String;
-    depUrl3: String;
-    depName4: String;
-    depUrl4: String;
-    depName5: String;
-    depUrl5: String;
-    depName6: String;
-    depUrl6: String;
-    depName7: String;
-    depUrl7: String;
-}
+    // ---------------------------------------------------------------------------
+    // Manifest struct
+    // ---------------------------------------------------------------------------
+    struct Manifest {
+        name: String;
+        version: String;
+        pkgType: String;
+        output: String;
+        depCount: int;
+        depName0: String;
+        depUrl0: String;
+        depName1: String;
+        depUrl1: String;
+        depName2: String;
+        depUrl2: String;
+        depName3: String;
+        depUrl3: String;
+        depName4: String;
+        depUrl4: String;
+        depName5: String;
+        depUrl5: String;
+        depName6: String;
+        depUrl6: String;
+        depName7: String;
+        depUrl7: String;
+    }
 
-// ---------------------------------------------------------------------------
-// Simple TOML parser (handles [Package] and [Build] sections)
-// ---------------------------------------------------------------------------
+    // ---------------------------------------------------------------------------
+    // Simple TOML parser (handles [Package] and [Build] sections)
+    // ---------------------------------------------------------------------------
 
-func Manifest_Parse(content: String) -> Manifest {
-    var m: Manifest;
-    m.name = "";
-    m.version = "0.1.0";
-    m.pkgType = "bin";
-    m.output = "Bin";
-    m.depCount = 0;
+    func Manifest_Parse(content: String) -> Manifest {
+        var m: Manifest;
+        m.name = "";
+        m.version = "0.1.0";
+        m.pkgType = "bin";
+        m.output = "Bin";
+        m.depCount = 0;
 
-    if String_Eq(content, "") { return m; }
+        if String_Eq(content, "") { return m; }
 
-    var currentSection: String = "";
-    let count: uint = String_SplitCount(content, "\n");
-    var i: uint = 0;
-    while i < count {
-        let line: String = String_SplitPart(content, "\n", i);
+        var currentSection: String = "";
+        let count: uint = String_SplitCount(content, "\n");
+        var i: uint = 0;
+        while i < count {
+            let line: String = String_SplitPart(content, "\n", i);
 
-        // Skip empty lines and comments
-        if String_Eq(line, "") { i = i + 1; continue; }
-        if String_StartsWith(line, "#") { i = i + 1; continue; }
+            // Skip empty lines and comments
+            if String_Eq(line, "") { i = i + 1; continue; }
+            if String_StartsWith(line, "#") { i = i + 1; continue; }
 
-        // Section header: [Section]
-        if String_StartsWith(line, "[") {
-            if String_StartsWith(line, "[Package]") {
-                currentSection = "Package";
-            } else if String_StartsWith(line, "[Build]") {
-                currentSection = "Build";
-            } else if String_StartsWith(line, "[dependencies]") {
-                currentSection = "dependencies";
-            } else {
-                currentSection = "";
+            // Section header: [Section]
+            if String_StartsWith(line, "[") {
+                if String_StartsWith(line, "[Package]") {
+                    currentSection = "Package";
+                } else if String_StartsWith(line, "[Build]") {
+                    currentSection = "Build";
+                } else if String_StartsWith(line, "[dependencies]") {
+                    currentSection = "dependencies";
+                } else {
+                    currentSection = "";
+                }
+                i = i + 1; continue;
             }
-            i = i + 1; continue;
-        }
 
-        // Key = Value
-        let eqCount: uint = String_SplitCount(line, "=");
-        if eqCount >= 2 {
-            let key: String = String_Trim(String_SplitPart(line, "=", 0));
-            let rawVal: String = String_Trim(String_SplitPart(line, "=", 1));
+            // Key = Value
+            let eqCount: uint = String_SplitCount(line, "=");
+            if eqCount >= 2 {
+                let key: String = String_Trim(String_SplitPart(line, "=", 0));
+                let rawVal: String = String_Trim(String_SplitPart(line, "=", 1));
 
-            // Strip quotes from value
-            var val: String = rawVal;
-            if String_StartsWith(val, "\"") && String_EndsWith(val, "\"") {
-                let vlen: uint = bux_strlen(val);
-                if vlen >= 2 {
-                    val = String_Slice(val, 1, vlen - 2);
-                }
-            }
-
-            if String_Eq(currentSection, "Package") {
-                if String_Eq(key, "Name") { m.name = val; }
-                if String_Eq(key, "Version") { m.version = val; }
-                if String_Eq(key, "Type") { m.pkgType = val; }
-            } else if String_Eq(currentSection, "Build") {
-                if String_Eq(key, "Output") { m.output = val; }
-            } else if String_Eq(currentSection, "dependencies") {
-                if m.depCount < 8 {
-                    if m.depCount == 0 { m.depName0 = key; m.depUrl0 = val; }
-                    else if m.depCount == 1 { m.depName1 = key; m.depUrl1 = val; }
-                    else if m.depCount == 2 { m.depName2 = key; m.depUrl2 = val; }
-                    else if m.depCount == 3 { m.depName3 = key; m.depUrl3 = val; }
-                    else if m.depCount == 4 { m.depName4 = key; m.depUrl4 = val; }
-                    else if m.depCount == 5 { m.depName5 = key; m.depUrl5 = val; }
-                    else if m.depCount == 6 { m.depName6 = key; m.depUrl6 = val; }
-                    else if m.depCount == 7 { m.depName7 = key; m.depUrl7 = val; }
-                    m.depCount = m.depCount + 1;
+                // Strip quotes from value
+                var val: String = rawVal;
+                if String_StartsWith(val, "\"") && String_EndsWith(val, "\"") {
+                    let vlen: uint = bux_strlen(val);
+                    if vlen >= 2 {
+                        val = String_Slice(val, 1, vlen - 2);
+                    }
+                }
+
+                if String_Eq(currentSection, "Package") {
+                    if String_Eq(key, "Name") { m.name = val; }
+                    if String_Eq(key, "Version") { m.version = val; }
+                    if String_Eq(key, "Type") { m.pkgType = val; }
+                } else if String_Eq(currentSection, "Build") {
+                    if String_Eq(key, "Output") { m.output = val; }
+                } else if String_Eq(currentSection, "dependencies") {
+                    if m.depCount < 8 {
+                        if m.depCount == 0 { m.depName0 = key; m.depUrl0 = val; }
+                        else if m.depCount == 1 { m.depName1 = key; m.depUrl1 = val; }
+                        else if m.depCount == 2 { m.depName2 = key; m.depUrl2 = val; }
+                        else if m.depCount == 3 { m.depName3 = key; m.depUrl3 = val; }
+                        else if m.depCount == 4 { m.depName4 = key; m.depUrl4 = val; }
+                        else if m.depCount == 5 { m.depName5 = key; m.depUrl5 = val; }
+                        else if m.depCount == 6 { m.depName6 = key; m.depUrl6 = val; }
+                        else if m.depCount == 7 { m.depName7 = key; m.depUrl7 = val; }
+                        m.depCount = m.depCount + 1;
+                    }
                 }
             }
+            i = i + 1;
         }
-        i = i + 1;
+
+        return m;
     }
 
-    return m;
-}
+    // ---------------------------------------------------------------------------
+    // Dependency helpers
+    // ---------------------------------------------------------------------------
 
-// ---------------------------------------------------------------------------
-// Dependency helpers
-// ---------------------------------------------------------------------------
-
-func Manifest_HasDep(m: Manifest, name: String) -> bool {
-    var i: int = 0;
-    while i < m.depCount {
-        var depName: String = "";
-        if i == 0 { depName = m.depName0; }
-        else if i == 1 { depName = m.depName1; }
-        else if i == 2 { depName = m.depName2; }
-        else if i == 3 { depName = m.depName3; }
-        else if i == 4 { depName = m.depName4; }
-        else if i == 5 { depName = m.depName5; }
-        else if i == 6 { depName = m.depName6; }
-        else if i == 7 { depName = m.depName7; }
-        if String_Eq(depName, name) { return true; }
-        i = i + 1;
+    func Manifest_HasDep(m: Manifest, name: String) -> bool {
+        var i: int = 0;
+        while i < m.depCount {
+            var depName: String = "";
+            if i == 0 { depName = m.depName0; }
+            else if i == 1 { depName = m.depName1; }
+            else if i == 2 { depName = m.depName2; }
+            else if i == 3 { depName = m.depName3; }
+            else if i == 4 { depName = m.depName4; }
+            else if i == 5 { depName = m.depName5; }
+            else if i == 6 { depName = m.depName6; }
+            else if i == 7 { depName = m.depName7; }
+            if String_Eq(depName, name) { return true; }
+            i = i + 1;
+        }
+        return false;
     }
-    return false;
-}
 
-func Manifest_GetDepUrl(m: Manifest, name: String) -> String {
-    var i: int = 0;
-    while i < m.depCount {
-        var depName: String = "";
-        var depUrl: String = "";
-        if i == 0 { depName = m.depName0; depUrl = m.depUrl0; }
-        else if i == 1 { depName = m.depName1; depUrl = m.depUrl1; }
-        else if i == 2 { depName = m.depName2; depUrl = m.depUrl2; }
-        else if i == 3 { depName = m.depName3; depUrl = m.depUrl3; }
-        else if i == 4 { depName = m.depName4; depUrl = m.depUrl4; }
-        else if i == 5 { depName = m.depName5; depUrl = m.depUrl5; }
-        else if i == 6 { depName = m.depName6; depUrl = m.depUrl6; }
-        else if i == 7 { depName = m.depName7; depUrl = m.depUrl7; }
-        if String_Eq(depName, name) { return depUrl; }
-        i = i + 1;
-    }
-    return "";
-}
-
-func Manifest_AddDep(m: *Manifest, name: String, url: String) -> bool {
-    if Manifest_HasDep(*m, name) { return false; }
-    if m.depCount >= 8 { return false; }
-    if m.depCount == 0 { m.depName0 = name; m.depUrl0 = url; }
-    else if m.depCount == 1 { m.depName1 = name; m.depUrl1 = url; }
-    else if m.depCount == 2 { m.depName2 = name; m.depUrl2 = url; }
-    else if m.depCount == 3 { m.depName3 = name; m.depUrl3 = url; }
-    else if m.depCount == 4 { m.depName4 = name; m.depUrl4 = url; }
-    else if m.depCount == 5 { m.depName5 = name; m.depUrl5 = url; }
-    else if m.depCount == 6 { m.depName6 = name; m.depUrl6 = url; }
-    else if m.depCount == 7 { m.depName7 = name; m.depUrl7 = url; }
-    m.depCount = m.depCount + 1;
-    return true;
-}
-
-func Manifest_RemoveDep(m: *Manifest, name: String) -> bool {
-    var found: int = -1;
-    var i: int = 0;
-    while i < m.depCount {
-        var depName: String = "";
-        if i == 0 { depName = m.depName0; }
-        else if i == 1 { depName = m.depName1; }
-        else if i == 2 { depName = m.depName2; }
-        else if i == 3 { depName = m.depName3; }
-        else if i == 4 { depName = m.depName4; }
-        else if i == 5 { depName = m.depName5; }
-        else if i == 6 { depName = m.depName6; }
-        else if i == 7 { depName = m.depName7; }
-        if String_Eq(depName, name) { found = i; break; }
-        i = i + 1;
-    }
-    if found < 0 { return false; }
-    i = found;
-    while i < m.depCount - 1 {
-        if i == 0 { m.depName0 = m.depName1; m.depUrl0 = m.depUrl1; }
-        else if i == 1 { m.depName1 = m.depName2; m.depUrl1 = m.depUrl2; }
-        else if i == 2 { m.depName2 = m.depName3; m.depUrl2 = m.depUrl3; }
-        else if i == 3 { m.depName3 = m.depName4; m.depUrl3 = m.depUrl4; }
-        else if i == 4 { m.depName4 = m.depName5; m.depUrl4 = m.depUrl5; }
-        else if i == 5 { m.depName5 = m.depName6; m.depUrl5 = m.depUrl6; }
-        else if i == 6 { m.depName6 = m.depName7; m.depUrl6 = m.depUrl7; }
-        i = i + 1;
-    }
-    m.depCount = m.depCount - 1;
-    return true;
-}
-
-// ---------------------------------------------------------------------------
-// Serialize manifest back to TOML
-// ---------------------------------------------------------------------------
-
-func Manifest_ToString(m: Manifest) -> String {
-    let sb: StringBuilder = StringBuilder_New();
-    StringBuilder_Append(&sb, "[Package]\n");
-    StringBuilder_Append(&sb, "Name    = \"");
-    StringBuilder_Append(&sb, m.name);
-    StringBuilder_Append(&sb, "\"\n");
-    StringBuilder_Append(&sb, "Version = \"");
-    StringBuilder_Append(&sb, m.version);
-    StringBuilder_Append(&sb, "\"\n");
-    StringBuilder_Append(&sb, "Type    = \"");
-    StringBuilder_Append(&sb, m.pkgType);
-    StringBuilder_Append(&sb, "\"\n\n");
-    StringBuilder_Append(&sb, "[Build]\n");
-    StringBuilder_Append(&sb, "Output = \"");
-    StringBuilder_Append(&sb, m.output);
-    StringBuilder_Append(&sb, "\"\n");
-    if m.depCount > 0 {
-        StringBuilder_Append(&sb, "\n[dependencies]\n");
+    func Manifest_GetDepUrl(m: Manifest, name: String) -> String {
         var i: int = 0;
         while i < m.depCount {
             var depName: String = "";
@@ -232,22 +145,109 @@ func Manifest_ToString(m: Manifest) -> String {
             else if i == 5 { depName = m.depName5; depUrl = m.depUrl5; }
             else if i == 6 { depName = m.depName6; depUrl = m.depUrl6; }
             else if i == 7 { depName = m.depName7; depUrl = m.depUrl7; }
-            StringBuilder_Append(&sb, depName);
-            StringBuilder_Append(&sb, " = \"");
-            StringBuilder_Append(&sb, depUrl);
-            StringBuilder_Append(&sb, "\"\n");
+            if String_Eq(depName, name) { return depUrl; }
             i = i + 1;
         }
+        return "";
     }
-    return StringBuilder_Build(&sb);
-}
 
-// ---------------------------------------------------------------------------
-// Load manifest from file
-// ---------------------------------------------------------------------------
+    func Manifest_AddDep(m: *Manifest, name: String, url: String) -> bool {
+        if Manifest_HasDep(*m, name) { return false; }
+        if m.depCount >= 8 { return false; }
+        if m.depCount == 0 { m.depName0 = name; m.depUrl0 = url; }
+        else if m.depCount == 1 { m.depName1 = name; m.depUrl1 = url; }
+        else if m.depCount == 2 { m.depName2 = name; m.depUrl2 = url; }
+        else if m.depCount == 3 { m.depName3 = name; m.depUrl3 = url; }
+        else if m.depCount == 4 { m.depName4 = name; m.depUrl4 = url; }
+        else if m.depCount == 5 { m.depName5 = name; m.depUrl5 = url; }
+        else if m.depCount == 6 { m.depName6 = name; m.depUrl6 = url; }
+        else if m.depCount == 7 { m.depName7 = name; m.depUrl7 = url; }
+        m.depCount = m.depCount + 1;
+        return true;
+    }
 
-func Manifest_Load(path: String) -> Manifest {
-    let content: String = ReadFile(path);
-    return Manifest_Parse(content);
-}
+    func Manifest_RemoveDep(m: *Manifest, name: String) -> bool {
+        var found: int = -1;
+        var i: int = 0;
+        while i < m.depCount {
+            var depName: String = "";
+            if i == 0 { depName = m.depName0; }
+            else if i == 1 { depName = m.depName1; }
+            else if i == 2 { depName = m.depName2; }
+            else if i == 3 { depName = m.depName3; }
+            else if i == 4 { depName = m.depName4; }
+            else if i == 5 { depName = m.depName5; }
+            else if i == 6 { depName = m.depName6; }
+            else if i == 7 { depName = m.depName7; }
+            if String_Eq(depName, name) { found = i; break; }
+            i = i + 1;
+        }
+        if found < 0 { return false; }
+        i = found;
+        while i < m.depCount - 1 {
+            if i == 0 { m.depName0 = m.depName1; m.depUrl0 = m.depUrl1; }
+            else if i == 1 { m.depName1 = m.depName2; m.depUrl1 = m.depUrl2; }
+            else if i == 2 { m.depName2 = m.depName3; m.depUrl2 = m.depUrl3; }
+            else if i == 3 { m.depName3 = m.depName4; m.depUrl3 = m.depUrl4; }
+            else if i == 4 { m.depName4 = m.depName5; m.depUrl4 = m.depUrl5; }
+            else if i == 5 { m.depName5 = m.depName6; m.depUrl5 = m.depUrl6; }
+            else if i == 6 { m.depName6 = m.depName7; m.depUrl6 = m.depUrl7; }
+            i = i + 1;
+        }
+        m.depCount = m.depCount - 1;
+        return true;
+    }
+
+    // ---------------------------------------------------------------------------
+    // Serialize manifest back to TOML
+    // ---------------------------------------------------------------------------
+
+    func Manifest_ToString(m: Manifest) -> String {
+        let sb: StringBuilder = StringBuilder_New();
+        StringBuilder_Append(&sb, "[Package]\n");
+        StringBuilder_Append(&sb, "Name    = \"");
+        StringBuilder_Append(&sb, m.name);
+        StringBuilder_Append(&sb, "\"\n");
+        StringBuilder_Append(&sb, "Version = \"");
+        StringBuilder_Append(&sb, m.version);
+        StringBuilder_Append(&sb, "\"\n");
+        StringBuilder_Append(&sb, "Type    = \"");
+        StringBuilder_Append(&sb, m.pkgType);
+        StringBuilder_Append(&sb, "\"\n\n");
+        StringBuilder_Append(&sb, "[Build]\n");
+        StringBuilder_Append(&sb, "Output = \"");
+        StringBuilder_Append(&sb, m.output);
+        StringBuilder_Append(&sb, "\"\n");
+        if m.depCount > 0 {
+            StringBuilder_Append(&sb, "\n[dependencies]\n");
+            var i: int = 0;
+            while i < m.depCount {
+                var depName: String = "";
+                var depUrl: String = "";
+                if i == 0 { depName = m.depName0; depUrl = m.depUrl0; }
+                else if i == 1 { depName = m.depName1; depUrl = m.depUrl1; }
+                else if i == 2 { depName = m.depName2; depUrl = m.depUrl2; }
+                else if i == 3 { depName = m.depName3; depUrl = m.depUrl3; }
+                else if i == 4 { depName = m.depName4; depUrl = m.depUrl4; }
+                else if i == 5 { depName = m.depName5; depUrl = m.depUrl5; }
+                else if i == 6 { depName = m.depName6; depUrl = m.depUrl6; }
+                else if i == 7 { depName = m.depName7; depUrl = m.depUrl7; }
+                StringBuilder_Append(&sb, depName);
+                StringBuilder_Append(&sb, " = \"");
+                StringBuilder_Append(&sb, depUrl);
+                StringBuilder_Append(&sb, "\"\n");
+                i = i + 1;
+            }
+        }
+        return StringBuilder_Build(&sb);
+    }
+
+    // ---------------------------------------------------------------------------
+    // Load manifest from file
+    // ---------------------------------------------------------------------------
+
+    func Manifest_Load(path: String) -> Manifest {
+        let content: String = ReadFile(path);
+        return Manifest_Parse(content);
+    }
 }

src/scope.bux

@@ -1,115 +1,115 @@
 // scope.bux — Symbol table with parent-chain lookup
 module Scope {
 
-// Symbol kinds
-const skVar: int = 0;
-const skFunc: int = 1;
-const skType: int = 2;
-const skConst: int = 3;
-const skModule: int = 4;
+    // Symbol kinds
+    const skVar: int = 0;
+    const skFunc: int = 1;
+    const skType: int = 2;
+    const skConst: int = 3;
+    const skModule: int = 4;
 
-// Maximum symbols per scope
-const maxSymbols: int = 8192;
+    // Maximum symbols per scope
+    const maxSymbols: int = 8192;
 
-struct Symbol {
-    kind: int;
-    name: String;
-    typeKind: int;
-    typeName: String;
-    refType: *TypeExpr;     // original type expression (for func types, etc.)
-    isMutable: bool;
-    isPublic: bool;
-    decl: *Decl;            // associated declaration (for funcs, structs, enums)
-}
-
-struct Scope {
-    symbols: *Symbol;
-    count: int;
-    parent: *Scope;
-}
-
-// ---------------------------------------------------------------------------
-// Scope operations
-// ---------------------------------------------------------------------------
-
-func Scope_New() -> Scope {
-    let sz: uint = maxSymbols as uint * sizeof(Symbol);
-    let data: *Symbol = bux_alloc(sz) as *Symbol;
-    return Scope { symbols: data, count: 0, parent: null as *Scope };
-}
-
-func Scope_NewChild(parent: *Scope) -> Scope {
-    let sz: uint = maxSymbols as uint * sizeof(Symbol);
-    let data: *Symbol = bux_alloc(sz) as *Symbol;
-    return Scope { symbols: data, count: 0, parent: parent };
-}
-
-func Scope_Define(scope: *Scope, sym: Symbol) -> bool {
-    // Check local scope for duplicates
-    var i: int = 0;
-    while i < scope.count {
-        if String_Eq(scope.symbols[i].name, sym.name) {
-            return false;
-        }
-        i = i + 1;
+    struct Symbol {
+        kind: int;
+        name: String;
+        typeKind: int;
+        typeName: String;
+        refType: *TypeExpr;     // original type expression (for func types, etc.)
+        isMutable: bool;
+        isPublic: bool;
+        decl: *Decl;            // associated declaration (for funcs, structs, enums)
     }
-    if scope.count < maxSymbols {
-        scope.symbols[scope.count] = sym;
-        scope.count = scope.count + 1;
-        return true;
-    }
-    return false;
-}
 
-func Scope_Lookup(scope: *Scope, name: String) -> Symbol {
-    var cur: *Scope = scope;
-    while cur != null as *Scope {
+    struct Scope {
+        symbols: *Symbol;
+        count: int;
+        parent: *Scope;
+    }
+
+    // ---------------------------------------------------------------------------
+    // Scope operations
+    // ---------------------------------------------------------------------------
+
+    func Scope_New() -> Scope {
+        let sz: uint = maxSymbols as uint * sizeof(Symbol);
+        let data: *Symbol = bux_alloc(sz) as *Symbol;
+        return Scope { symbols: data, count: 0, parent: null as *Scope };
+    }
+
+    func Scope_NewChild(parent: *Scope) -> Scope {
+        let sz: uint = maxSymbols as uint * sizeof(Symbol);
+        let data: *Symbol = bux_alloc(sz) as *Symbol;
+        return Scope { symbols: data, count: 0, parent: parent };
+    }
+
+    func Scope_Define(scope: *Scope, sym: Symbol) -> bool {
+        // Check local scope for duplicates
         var i: int = 0;
-        while i < cur.count {
-            if String_Eq(cur.symbols[i].name, name) {
-                return cur.symbols[i];
+        while i < scope.count {
+            if String_Eq(scope.symbols[i].name, sym.name) {
+                return false;
             }
             i = i + 1;
         }
-        cur = cur.parent;
-    }
-    var empty: Symbol = Symbol { kind: 0, name: "", typeKind: 0, typeName: "", refType: null as *TypeExpr, isMutable: false, isPublic: false, decl: null as *Decl };
-    return empty;
-}
-
-func Scope_LookupLocal(scope: *Scope, name: String) -> Symbol {
-    var i: int = 0;
-    while i < scope.count {
-        if String_Eq(scope.symbols[i].name, name) {
-            return scope.symbols[i];
+        if scope.count < maxSymbols {
+            scope.symbols[scope.count] = sym;
+            scope.count = scope.count + 1;
+            return true;
         }
-        i = i + 1;
+        return false;
     }
-    var empty: Symbol = Symbol { kind: 0, name: "", typeKind: 0, typeName: "", refType: null as *TypeExpr, isMutable: false, isPublic: false, decl: null as *Decl };
-    return empty;
-}
 
-func Scope_LookupUpTo(scope: *Scope, name: String, limit: *Scope) -> Symbol {
-    var cur: *Scope = scope;
-    while cur != null as *Scope {
+    func Scope_Lookup(scope: *Scope, name: String) -> Symbol {
+        var cur: *Scope = scope;
+        while cur != null as *Scope {
+            var i: int = 0;
+            while i < cur.count {
+                if String_Eq(cur.symbols[i].name, name) {
+                    return cur.symbols[i];
+                }
+                i = i + 1;
+            }
+            cur = cur.parent;
+        }
+        var empty: Symbol = Symbol { kind: 0, name: "", typeKind: 0, typeName: "", refType: null as *TypeExpr, isMutable: false, isPublic: false, decl: null as *Decl };
+        return empty;
+    }
+
+    func Scope_LookupLocal(scope: *Scope, name: String) -> Symbol {
         var i: int = 0;
-        while i < cur.count {
-            if String_Eq(cur.symbols[i].name, name) {
-                return cur.symbols[i];
+        while i < scope.count {
+            if String_Eq(scope.symbols[i].name, name) {
+                return scope.symbols[i];
             }
             i = i + 1;
         }
-        if cur == limit {
-            break;
-        }
-        cur = cur.parent;
+        var empty: Symbol = Symbol { kind: 0, name: "", typeKind: 0, typeName: "", refType: null as *TypeExpr, isMutable: false, isPublic: false, decl: null as *Decl };
+        return empty;
     }
-    var empty: Symbol = Symbol { kind: 0, name: "", typeKind: 0, typeName: "", refType: null as *TypeExpr, isMutable: false, isPublic: false, decl: null as *Decl };
-    return empty;
-}
 
-func Scope_Free(scope: *Scope) {
-    bux_free(scope.symbols as *void);
-}
+    func Scope_LookupUpTo(scope: *Scope, name: String, limit: *Scope) -> Symbol {
+        var cur: *Scope = scope;
+        while cur != null as *Scope {
+            var i: int = 0;
+            while i < cur.count {
+                if String_Eq(cur.symbols[i].name, name) {
+                    return cur.symbols[i];
+                }
+                i = i + 1;
+            }
+            if cur == limit {
+                break;
+            }
+            cur = cur.parent;
+        }
+        var empty: Symbol = Symbol { kind: 0, name: "", typeKind: 0, typeName: "", refType: null as *TypeExpr, isMutable: false, isPublic: false, decl: null as *Decl };
+        return empty;
+    }
+
+    func Scope_Free(scope: *Scope) {
+        bux_free(scope.symbols as *void);
+    }
 
 }

src/source_location.bux

@@ -1,13 +1,13 @@
 // source_location.bux — Source position tracking
 module SourceLocation {
 
-struct SourceLocation {
-    line: uint32;
-    column: uint32;
-    offset: uint32;
-}
+    struct SourceLocation {
+        line: uint32;
+        column: uint32;
+        offset: uint32;
+    }
 
-func SourceLocation_New(line: uint32, column: uint32, offset: uint32) -> SourceLocation {
-    return SourceLocation { line: line, column: column, offset: offset };
-}
+    func SourceLocation_New(line: uint32, column: uint32, offset: uint32) -> SourceLocation {
+        return SourceLocation { line: line, column: column, offset: offset };
+    }
 }

src/token.bux

@@ -1,346 +1,350 @@
 // token.bux — Token kinds and helpers
 module Token {
 
-// ---------------------------------------------------------------------------
-// TokenKind enum
-// ---------------------------------------------------------------------------
+    // ---------------------------------------------------------------------------
+    // TokenKind enum
+    // ---------------------------------------------------------------------------
 
-// Literals
-const tkIntLiteral: int = 0;
-const tkFloatLiteral: int = 1;
-const tkStringLiteral: int = 2;
-const tkCharLiteral: int = 3;
-const tkBoolLiteral: int = 4;
+    // Literals
+    const tkIntLiteral: int = 0;
+    const tkFloatLiteral: int = 1;
+    const tkStringLiteral: int = 2;
+    const tkCharLiteral: int = 3;
+    const tkBoolLiteral: int = 4;
 
-// Identifiers
-const tkIdent: int = 5;
-const tkUnderscore: int = 6;
+    // Identifiers
+    const tkIdent: int = 5;
+    const tkUnderscore: int = 6;
 
-// Control flow keywords
-const tkIf: int = 7;
-const tkElse: int = 8;
-const tkWhile: int = 9;
-const tkDo: int = 10;
-const tkLoop: int = 11;
-const tkFor: int = 12;
-const tkIn: int = 13;
-const tkBreak: int = 14;
-const tkContinue: int = 15;
-const tkReturn: int = 16;
-const tkMatch: int = 17;
+    // Control flow keywords
+    const tkIf: int = 7;
+    const tkElse: int = 8;
+    const tkWhile: int = 9;
+    const tkDo: int = 10;
+    const tkLoop: int = 11;
+    const tkFor: int = 12;
+    const tkIn: int = 13;
+    const tkBreak: int = 14;
+    const tkContinue: int = 15;
+    const tkReturn: int = 16;
+    const tkMatch: int = 17;
 
-// Declaration keywords
-const tkFunc: int = 18;
-const tkLet: int = 19;
-const tkVar: int = 20;
-const tkConst: int = 21;
-const tkType: int = 22;
-const tkStruct: int = 23;
-const tkEnum: int = 24;
-const tkUnion: int = 25;
-const tkInterface: int = 26;
-const tkExtend: int = 27;
-const tkModule: int = 28;
-const tkImport: int = 29;
-const tkPub: int = 30;
-const tkExtern: int = 31;
+    // Declaration keywords
+    const tkFunc: int = 18;
+    const tkLet: int = 19;
+    const tkVar: int = 20;
+    const tkConst: int = 21;
+    const tkType: int = 22;
+    const tkStruct: int = 23;
+    const tkEnum: int = 24;
+    const tkUnion: int = 25;
+    const tkInterface: int = 26;
+    const tkExtend: int = 27;
+    const tkModule: int = 28;
+    const tkImport: int = 29;
+    const tkPub: int = 30;
+    const tkExtern: int = 31;
 
-// Other keywords
-const tkAs: int = 32;
-const tkIs: int = 33;
-const tkNull: int = 34;
-const tkSelf: int = 35;
-const tkSuper: int = 36;
-const tkSizeOf: int = 37;
+    // Other keywords
+    const tkAs: int = 32;
+    const tkIs: int = 33;
+    const tkNull: int = 34;
+    const tkSelf: int = 35;
+    const tkSuper: int = 36;
+    const tkSizeOf: int = 37;
 
-// Punctuation
-const tkLParen: int = 38;
-const tkRParen: int = 39;
-const tkLBrace: int = 40;
-const tkRBrace: int = 41;
-const tkLBracket: int = 42;
-const tkRBracket: int = 43;
-const tkComma: int = 44;
-const tkSemicolon: int = 45;
-const tkColon: int = 46;
-const tkColonColon: int = 47;
-const tkDot: int = 48;
-const tkDotDot: int = 49;
-const tkDotDotDot: int = 50;
-const tkDotDotEqual: int = 51;
-const tkArrow: int = 52;
-const tkFatArrow: int = 53;
-const tkAt: int = 54;
-const tkHash: int = 55;
-const tkQuestion: int = 56;
+    // Punctuation
+    const tkLParen: int = 38;
+    const tkRParen: int = 39;
+    const tkLBrace: int = 40;
+    const tkRBrace: int = 41;
+    const tkLBracket: int = 42;
+    const tkRBracket: int = 43;
+    const tkComma: int = 44;
+    const tkSemicolon: int = 45;
+    const tkColon: int = 46;
+    const tkColonColon: int = 47;
+    const tkDot: int = 48;
+    const tkDotDot: int = 49;
+    const tkDotDotDot: int = 50;
+    const tkDotDotEqual: int = 51;
+    const tkArrow: int = 52;
+    const tkFatArrow: int = 53;
+    const tkAt: int = 54;
+    const tkHash: int = 55;
+    const tkQuestion: int = 56;
 
-// Arithmetic operators
-const tkPlus: int = 57;
-const tkMinus: int = 58;
-const tkStar: int = 59;
-const tkSlash: int = 60;
-const tkPercent: int = 61;
-const tkStarStar: int = 62;
-const tkPlusPlus: int = 63;
-const tkMinusMinus: int = 64;
+    // Arithmetic operators
+    const tkPlus: int = 57;
+    const tkMinus: int = 58;
+    const tkStar: int = 59;
+    const tkSlash: int = 60;
+    const tkPercent: int = 61;
+    const tkStarStar: int = 62;
+    const tkPlusPlus: int = 63;
+    const tkMinusMinus: int = 64;
 
-// Bitwise operators
-const tkAmp: int = 65;
-const tkPipe: int = 66;
-const tkCaret: int = 67;
-const tkTilde: int = 68;
-const tkShl: int = 69;
-const tkShr: int = 70;
+    // Bitwise operators
+    const tkAmp: int = 65;
+    const tkPipe: int = 66;
+    const tkCaret: int = 67;
+    const tkTilde: int = 68;
+    const tkShl: int = 69;
+    const tkShr: int = 70;
 
-// Logical operators
-const tkAmpAmp: int = 71;
-const tkPipePipe: int = 72;
-const tkBang: int = 73;
+    // Logical operators
+    const tkAmpAmp: int = 71;
+    const tkPipePipe: int = 72;
+    const tkBang: int = 73;
 
-// Comparison operators
-const tkEq: int = 74;
-const tkNe: int = 75;
-const tkLt: int = 76;
-const tkLe: int = 77;
-const tkGt: int = 78;
-const tkGe: int = 79;
+    // Comparison operators
+    const tkEq: int = 74;
+    const tkNe: int = 75;
+    const tkLt: int = 76;
+    const tkLe: int = 77;
+    const tkGt: int = 78;
+    const tkGe: int = 79;
 
-// Assignment operators
-const tkAssign: int = 80;
-const tkPlusAssign: int = 81;
-const tkMinusAssign: int = 82;
-const tkStarAssign: int = 83;
-const tkSlashAssign: int = 84;
-const tkPercentAssign: int = 85;
-const tkAmpAssign: int = 86;
-const tkPipeAssign: int = 87;
-const tkCaretAssign: int = 88;
-const tkShlAssign: int = 89;
-const tkShrAssign: int = 90;
+    // Assignment operators
+    const tkAssign: int = 80;
+    const tkPlusAssign: int = 81;
+    const tkMinusAssign: int = 82;
+    const tkStarAssign: int = 83;
+    const tkSlashAssign: int = 84;
+    const tkPercentAssign: int = 85;
+    const tkAmpAssign: int = 86;
+    const tkPipeAssign: int = 87;
+    const tkCaretAssign: int = 88;
+    const tkShlAssign: int = 89;
+    const tkShrAssign: int = 90;
 
-// Compile-time intrinsics
-const tkHashLine: int = 91;
-const tkHashColumn: int = 92;
-const tkHashFile: int = 93;
-const tkHashFunction: int = 94;
-const tkHashDate: int = 95;
-const tkHashTime: int = 96;
-const tkHashModule: int = 97;
+    // Compile-time intrinsics
+    const tkHashLine: int = 91;
+    const tkHashColumn: int = 92;
+    const tkHashFile: int = 93;
+    const tkHashFunction: int = 94;
+    const tkHashDate: int = 95;
+    const tkHashTime: int = 96;
+    const tkHashModule: int = 97;
 
-// Special
-const tkOwn: int = 98;
-const tkNewLine: int = 99;
-const tkEndOfFile: int = 100;
-const tkUnknown: int = 101;
+    // Special
+    const tkOwn: int = 98;
+    const tkNewLine: int = 99;
+    const tkEndOfFile: int = 100;
+    const tkUnknown: int = 101;
 
-// Async / concurrency
-const tkAsync: int = 102;
-const tkAwait: int = 103;
-const tkSpawn: int = 104;
-const tkDiscard: int = 105;
-const tkDefer: int = 106;
-const tkSwitch: int = 107;
-const tkCase: int = 108;
-const tkDefault: int = 109;
-const tkUnsafe: int = 110;
+    // Async / concurrency
+    const tkAsync: int = 102;
+    const tkAwait: int = 103;
+    const tkSpawn: int = 104;
+    const tkDiscard: int = 105;
+    const tkDefer: int = 106;
+    const tkSwitch: int = 107;
+    const tkCase: int = 108;
+    const tkDefault: int = 109;
+    const tkUnsafe: int = 110;
 
-// ---------------------------------------------------------------------------
-// Token struct
-// ---------------------------------------------------------------------------
+    // Lifetime parameter token: 'a, 'b, ... (not a char literal)
+    const tkLifetime: int = 111;
 
-struct Token {
-    kind: int;
-    text: String;
-    line: uint32;
-    column: uint32;
-    offset: uint32;
-}
-
-// ---------------------------------------------------------------------------
-// Helpers
-// ---------------------------------------------------------------------------
-
-func Token_IsKeyword(kind: int) -> bool {
-    if kind >= tkIf && kind <= tkIn { return true; }
-    if kind >= tkBreak && kind <= tkMatch { return true; }
-    if kind >= tkFunc && kind <= tkExtern { return true; }
-    if kind >= tkAs && kind <= tkSuper { return true; }
-    if kind == tkSizeOf { return true; }
-    if kind >= tkDefer && kind <= tkUnsafe { return true; }
-    if kind >= tkAsync && kind <= tkSpawn { return true; }
-    return false;
-}
-
-func Token_IsLiteral(kind: int) -> bool {
-    if kind >= tkIntLiteral && kind <= tkBoolLiteral { return true; }
-    return false;
-}
-
-func Token_IsOperator(kind: int) -> bool {
-    if kind >= tkPlus && kind <= tkShrAssign { return true; }
-    return false;
-}
-
-func Token_IsEof(kind: int) -> bool {
-    return kind == tkEndOfFile;
-}
-
-func Token_KeywordKind(text: String) -> int {
-    if String_Eq(text, "func") { return tkFunc; }
-    if String_Eq(text, "let") { return tkLet; }
-    if String_Eq(text, "var") { return tkVar; }
-    if String_Eq(text, "const") { return tkConst; }
-    if String_Eq(text, "type") { return tkType; }
-    if String_Eq(text, "struct") { return tkStruct; }
-    if String_Eq(text, "enum") { return tkEnum; }
-    if String_Eq(text, "union") { return tkUnion; }
-    if String_Eq(text, "interface") { return tkInterface; }
-    if String_Eq(text, "extend") { return tkExtend; }
-    if String_Eq(text, "module") { return tkModule; }
-    if String_Eq(text, "import") { return tkImport; }
-    if String_Eq(text, "pub") { return tkPub; }
-    if String_Eq(text, "extern") { return tkExtern; }
-    if String_Eq(text, "if") { return tkIf; }
-    if String_Eq(text, "else") { return tkElse; }
-    if String_Eq(text, "while") { return tkWhile; }
-    if String_Eq(text, "do") { return tkDo; }
-    if String_Eq(text, "loop") { return tkLoop; }
-    if String_Eq(text, "for") { return tkFor; }
-    if String_Eq(text, "in") { return tkIn; }
-    if String_Eq(text, "break") { return tkBreak; }
-    if String_Eq(text, "continue") { return tkContinue; }
-    if String_Eq(text, "return") { return tkReturn; }
-    if String_Eq(text, "match") { return tkMatch; }
-    if String_Eq(text, "as") { return tkAs; }
-    if String_Eq(text, "is") { return tkIs; }
-    if String_Eq(text, "null") { return tkNull; }
-    if String_Eq(text, "self") { return tkSelf; }
-    if String_Eq(text, "super") { return tkSuper; }
-    if String_Eq(text, "sizeof") { return tkSizeOf; }
-    if String_Eq(text, "defer") { return tkDefer; }
-    if String_Eq(text, "switch") { return tkSwitch; }
-    if String_Eq(text, "case") { return tkCase; }
-    if String_Eq(text, "default") { return tkDefault; }
-    if String_Eq(text, "unsafe") { return tkUnsafe; }
-    if String_Eq(text, "discard") { return tkDiscard; }
-    if String_Eq(text, "async") { return tkAsync; }
-    if String_Eq(text, "await") { return tkAwait; }
-    if String_Eq(text, "spawn") { return tkSpawn; }
-    if String_Eq(text, "true") { return tkBoolLiteral; }
-    if String_Eq(text, "false") { return tkBoolLiteral; }
-    return tkIdent;
-}
-
-func Token_KindName(kind: int) -> String {
-    if kind == tkIntLiteral { return "integer literal"; }
-    if kind == tkFloatLiteral { return "float literal"; }
-    if kind == tkStringLiteral { return "string literal"; }
-    if kind == tkCharLiteral { return "char literal"; }
-    if kind == tkBoolLiteral { return "boolean literal"; }
-    if kind == tkIdent { return "identifier"; }
-    if kind == tkUnderscore { return "_"; }
-    if kind == tkSizeOf { return "sizeof"; }
-    if kind == tkIf { return "if"; }
-    if kind == tkElse { return "else"; }
-    if kind == tkWhile { return "while"; }
-    if kind == tkDo { return "do"; }
-    if kind == tkLoop { return "loop"; }
-    if kind == tkFor { return "for"; }
-    if kind == tkIn { return "in"; }
-    if kind == tkBreak { return "break"; }
-    if kind == tkContinue { return "continue"; }
-    if kind == tkReturn { return "return"; }
-    if kind == tkMatch { return "match"; }
-    if kind == tkFunc { return "func"; }
-    if kind == tkLet { return "let"; }
-    if kind == tkVar { return "var"; }
-    if kind == tkConst { return "const"; }
-    if kind == tkType { return "type"; }
-    if kind == tkStruct { return "struct"; }
-    if kind == tkEnum { return "enum"; }
-    if kind == tkUnion { return "union"; }
-    if kind == tkInterface { return "interface"; }
-    if kind == tkExtend { return "extend"; }
-    if kind == tkModule { return "module"; }
-    if kind == tkImport { return "import"; }
-    if kind == tkPub { return "pub"; }
-    if kind == tkExtern { return "extern"; }
-    if kind == tkAs { return "as"; }
-    if kind == tkIs { return "is"; }
-    if kind == tkNull { return "null"; }
-    if kind == tkSelf { return "self"; }
-    if kind == tkSuper { return "super"; }
-    if kind == tkUnsafe { return "unsafe"; }
-    if kind == tkDefer { return "defer"; }
-    if kind == tkSwitch { return "switch"; }
-    if kind == tkCase { return "case"; }
-    if kind == tkDefault { return "default"; }
-    if kind == tkAsync { return "async"; }
-    if kind == tkAwait { return "await"; }
-    if kind == tkSpawn { return "spawn"; }
-    if kind == tkDiscard { return "discard"; }
-    if kind == tkLParen { return "("; }
-    if kind == tkRParen { return ")"; }
-    if kind == tkLBrace { return "{"; }
-    if kind == tkRBrace { return "}"; }
-    if kind == tkLBracket { return "["; }
-    if kind == tkRBracket { return "]"; }
-    if kind == tkComma { return ","; }
-    if kind == tkSemicolon { return ";"; }
-    if kind == tkColon { return ":"; }
-    if kind == tkColonColon { return "::"; }
-    if kind == tkDot { return "."; }
-    if kind == tkDotDot { return ".."; }
-    if kind == tkDotDotDot { return "..."; }
-    if kind == tkDotDotEqual { return "..="; }
-    if kind == tkArrow { return "->"; }
-    if kind == tkFatArrow { return "=>"; }
-    if kind == tkAt { return "@"; }
-    if kind == tkHash { return "#"; }
-    if kind == tkQuestion { return "?"; }
-    if kind == tkPlus { return "+"; }
-    if kind == tkMinus { return "-"; }
-    if kind == tkStar { return "*"; }
-    if kind == tkSlash { return "/"; }
-    if kind == tkPercent { return "%"; }
-    if kind == tkStarStar { return "**"; }
-    if kind == tkPlusPlus { return "++"; }
-    if kind == tkMinusMinus { return "--"; }
-    if kind == tkAmp { return "&"; }
-    if kind == tkPipe { return "|"; }
-    if kind == tkCaret { return "^"; }
-    if kind == tkTilde { return "~"; }
-    if kind == tkShl { return "<<"; }
-    if kind == tkShr { return ">>"; }
-    if kind == tkAmpAmp { return "&&"; }
-    if kind == tkPipePipe { return "||"; }
-    if kind == tkBang { return "!"; }
-    if kind == tkEq { return "=="; }
-    if kind == tkNe { return "!="; }
-    if kind == tkLt { return "<"; }
-    if kind == tkLe { return "<="; }
-    if kind == tkGt { return ">"; }
-    if kind == tkGe { return ">="; }
-    if kind == tkAssign { return "="; }
-    if kind == tkPlusAssign { return "+="; }
-    if kind == tkMinusAssign { return "-="; }
-    if kind == tkStarAssign { return "*="; }
-    if kind == tkSlashAssign { return "/="; }
-    if kind == tkPercentAssign { return "%="; }
-    if kind == tkAmpAssign { return "&="; }
-    if kind == tkPipeAssign { return "|="; }
-    if kind == tkCaretAssign { return "^="; }
-    if kind == tkShlAssign { return "<<="; }
-    if kind == tkShrAssign { return ">>="; }
-    if kind == tkHashLine { return "#line"; }
-    if kind == tkHashColumn { return "#column"; }
-    if kind == tkHashFile { return "#file"; }
-    if kind == tkHashFunction { return "#function"; }
-    if kind == tkHashDate { return "#date"; }
-    if kind == tkHashTime { return "#time"; }
-    if kind == tkHashModule { return "#module"; }
-    if kind == tkNewLine { return "newline"; }
-    if kind == tkEndOfFile { return "end of file"; }
-    return "unknown token";
-}
+    // ---------------------------------------------------------------------------
+    // Token struct
+    // ---------------------------------------------------------------------------
+
+    struct Token {
+        kind: int;
+        text: String;
+        line: uint32;
+        column: uint32;
+        offset: uint32;
+    }
+
+    // ---------------------------------------------------------------------------
+    // Helpers
+    // ---------------------------------------------------------------------------
+
+    func Token_IsKeyword(kind: int) -> bool {
+        if kind >= tkIf && kind <= tkIn { return true; }
+        if kind >= tkBreak && kind <= tkMatch { return true; }
+        if kind >= tkFunc && kind <= tkExtern { return true; }
+        if kind >= tkAs && kind <= tkSuper { return true; }
+        if kind == tkSizeOf { return true; }
+        if kind >= tkDefer && kind <= tkUnsafe { return true; }
+        if kind >= tkAsync && kind <= tkSpawn { return true; }
+        return false;
+    }
+
+    func Token_IsLiteral(kind: int) -> bool {
+        if kind >= tkIntLiteral && kind <= tkBoolLiteral { return true; }
+        return false;
+    }
+
+    func Token_IsOperator(kind: int) -> bool {
+        if kind >= tkPlus && kind <= tkShrAssign { return true; }
+        return false;
+    }
+
+    func Token_IsEof(kind: int) -> bool {
+        return kind == tkEndOfFile;
+    }
+
+    func Token_KeywordKind(text: String) -> int {
+        if String_Eq(text, "func") { return tkFunc; }
+        if String_Eq(text, "let") { return tkLet; }
+        if String_Eq(text, "var") { return tkVar; }
+        if String_Eq(text, "const") { return tkConst; }
+        if String_Eq(text, "type") { return tkType; }
+        if String_Eq(text, "struct") { return tkStruct; }
+        if String_Eq(text, "enum") { return tkEnum; }
+        if String_Eq(text, "union") { return tkUnion; }
+        if String_Eq(text, "interface") { return tkInterface; }
+        if String_Eq(text, "extend") { return tkExtend; }
+        if String_Eq(text, "module") { return tkModule; }
+        if String_Eq(text, "import") { return tkImport; }
+        if String_Eq(text, "pub") { return tkPub; }
+        if String_Eq(text, "extern") { return tkExtern; }
+        if String_Eq(text, "if") { return tkIf; }
+        if String_Eq(text, "else") { return tkElse; }
+        if String_Eq(text, "while") { return tkWhile; }
+        if String_Eq(text, "do") { return tkDo; }
+        if String_Eq(text, "loop") { return tkLoop; }
+        if String_Eq(text, "for") { return tkFor; }
+        if String_Eq(text, "in") { return tkIn; }
+        if String_Eq(text, "break") { return tkBreak; }
+        if String_Eq(text, "continue") { return tkContinue; }
+        if String_Eq(text, "return") { return tkReturn; }
+        if String_Eq(text, "match") { return tkMatch; }
+        if String_Eq(text, "as") { return tkAs; }
+        if String_Eq(text, "is") { return tkIs; }
+        if String_Eq(text, "null") { return tkNull; }
+        if String_Eq(text, "self") { return tkSelf; }
+        if String_Eq(text, "super") { return tkSuper; }
+        if String_Eq(text, "sizeof") { return tkSizeOf; }
+        if String_Eq(text, "defer") { return tkDefer; }
+        if String_Eq(text, "switch") { return tkSwitch; }
+        if String_Eq(text, "case") { return tkCase; }
+        if String_Eq(text, "default") { return tkDefault; }
+        if String_Eq(text, "unsafe") { return tkUnsafe; }
+        if String_Eq(text, "discard") { return tkDiscard; }
+        if String_Eq(text, "async") { return tkAsync; }
+        if String_Eq(text, "await") { return tkAwait; }
+        if String_Eq(text, "spawn") { return tkSpawn; }
+        if String_Eq(text, "true") { return tkBoolLiteral; }
+        if String_Eq(text, "false") { return tkBoolLiteral; }
+        return tkIdent;
+    }
+
+    func Token_KindName(kind: int) -> String {
+        if kind == tkIntLiteral { return "integer literal"; }
+        if kind == tkFloatLiteral { return "float literal"; }
+        if kind == tkStringLiteral { return "string literal"; }
+        if kind == tkCharLiteral { return "char literal"; }
+        if kind == tkBoolLiteral { return "boolean literal"; }
+        if kind == tkIdent { return "identifier"; }
+        if kind == tkUnderscore { return "_"; }
+        if kind == tkSizeOf { return "sizeof"; }
+        if kind == tkIf { return "if"; }
+        if kind == tkElse { return "else"; }
+        if kind == tkWhile { return "while"; }
+        if kind == tkDo { return "do"; }
+        if kind == tkLoop { return "loop"; }
+        if kind == tkFor { return "for"; }
+        if kind == tkIn { return "in"; }
+        if kind == tkBreak { return "break"; }
+        if kind == tkContinue { return "continue"; }
+        if kind == tkReturn { return "return"; }
+        if kind == tkMatch { return "match"; }
+        if kind == tkFunc { return "func"; }
+        if kind == tkLet { return "let"; }
+        if kind == tkVar { return "var"; }
+        if kind == tkConst { return "const"; }
+        if kind == tkType { return "type"; }
+        if kind == tkStruct { return "struct"; }
+        if kind == tkEnum { return "enum"; }
+        if kind == tkUnion { return "union"; }
+        if kind == tkInterface { return "interface"; }
+        if kind == tkExtend { return "extend"; }
+        if kind == tkModule { return "module"; }
+        if kind == tkImport { return "import"; }
+        if kind == tkPub { return "pub"; }
+        if kind == tkExtern { return "extern"; }
+        if kind == tkAs { return "as"; }
+        if kind == tkIs { return "is"; }
+        if kind == tkNull { return "null"; }
+        if kind == tkSelf { return "self"; }
+        if kind == tkSuper { return "super"; }
+        if kind == tkUnsafe { return "unsafe"; }
+        if kind == tkDefer { return "defer"; }
+        if kind == tkSwitch { return "switch"; }
+        if kind == tkCase { return "case"; }
+        if kind == tkDefault { return "default"; }
+        if kind == tkAsync { return "async"; }
+        if kind == tkAwait { return "await"; }
+        if kind == tkSpawn { return "spawn"; }
+        if kind == tkDiscard { return "discard"; }
+        if kind == tkLParen { return "("; }
+        if kind == tkRParen { return ")"; }
+        if kind == tkLBrace { return "{"; }
+        if kind == tkRBrace { return "}"; }
+        if kind == tkLBracket { return "["; }
+        if kind == tkRBracket { return "]"; }
+        if kind == tkComma { return ","; }
+        if kind == tkSemicolon { return ";"; }
+        if kind == tkColon { return ":"; }
+        if kind == tkColonColon { return "::"; }
+        if kind == tkDot { return "."; }
+        if kind == tkDotDot { return ".."; }
+        if kind == tkDotDotDot { return "..."; }
+        if kind == tkDotDotEqual { return "..="; }
+        if kind == tkArrow { return "->"; }
+        if kind == tkFatArrow { return "=>"; }
+        if kind == tkAt { return "@"; }
+        if kind == tkHash { return "#"; }
+        if kind == tkQuestion { return "?"; }
+        if kind == tkPlus { return "+"; }
+        if kind == tkMinus { return "-"; }
+        if kind == tkStar { return "*"; }
+        if kind == tkSlash { return "/"; }
+        if kind == tkPercent { return "%"; }
+        if kind == tkStarStar { return "**"; }
+        if kind == tkPlusPlus { return "++"; }
+        if kind == tkMinusMinus { return "--"; }
+        if kind == tkAmp { return "&"; }
+        if kind == tkPipe { return "|"; }
+        if kind == tkCaret { return "^"; }
+        if kind == tkTilde { return "~"; }
+        if kind == tkShl { return "<<"; }
+        if kind == tkShr { return ">>"; }
+        if kind == tkAmpAmp { return "&&"; }
+        if kind == tkPipePipe { return "||"; }
+        if kind == tkBang { return "!"; }
+        if kind == tkEq { return "=="; }
+        if kind == tkNe { return "!="; }
+        if kind == tkLt { return "<"; }
+        if kind == tkLe { return "<="; }
+        if kind == tkGt { return ">"; }
+        if kind == tkGe { return ">="; }
+        if kind == tkAssign { return "="; }
+        if kind == tkPlusAssign { return "+="; }
+        if kind == tkMinusAssign { return "-="; }
+        if kind == tkStarAssign { return "*="; }
+        if kind == tkSlashAssign { return "/="; }
+        if kind == tkPercentAssign { return "%="; }
+        if kind == tkAmpAssign { return "&="; }
+        if kind == tkPipeAssign { return "|="; }
+        if kind == tkCaretAssign { return "^="; }
+        if kind == tkShlAssign { return "<<="; }
+        if kind == tkShrAssign { return ">>="; }
+        if kind == tkHashLine { return "#line"; }
+        if kind == tkHashColumn { return "#column"; }
+        if kind == tkHashFile { return "#file"; }
+        if kind == tkHashFunction { return "#function"; }
+        if kind == tkHashDate { return "#date"; }
+        if kind == tkHashTime { return "#time"; }
+        if kind == tkHashModule { return "#module"; }
+        if kind == tkLifetime { return "lifetime"; }
+        if kind == tkNewLine { return "newline"; }
+        if kind == tkEndOfFile { return "end of file"; }
+        return "unknown token";
+    }
 }