fix: 18 bugs across interpreter, reader, emitter, and runtime

- cljMinMax now handles float and mixed int/float arguments
- cljType* covers ckSet, ckTransient, ckAgent
- cljConj and cljVec return vectors instead of lists
- rem uses truncated division semantics (matches Clojure)
- range with negative step terminates correctly
- reduce of empty collection with no init errors instead of returning nil
- swap! extra args flatten correctly
- remove duplicate not definition (dead code)
- ratio literals (1/5) parse correctly
- scientific notation uses correct variable (numTok not tok)
- readSet returns proper set value instead of (set [...]) form
- TCP REPL catches specific exceptions instead of bare except
- initBuiltinMacros guards against duplicate registration
- doseq :while clause no longer generates dead code or infinite loop
- emitter resets all global state on each emitProgram call
- pushLeaf fills gaps with internal nodes instead of nil children

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

lib/cljnim_pvec.nim

@@ -77,17 +77,13 @@ proc pushLeaf[T](node: PVecNode[T], index: int, shift: int, val: seq[T]): PVecNo
   # Push a full leaf (seq of up to 32 values) into the tree at position 'index'
   result = copyNode(node)
   if shift == 0:
-    # Should not happen — we always push into internal nodes
     result = newLeafNode[T](val)
   else:
     let childIdx = (index shr shift) and BRANCHING_MASK
-    if childIdx >= result.children.len:
+    # Grow children array and fill any gaps with empty internal nodes
-      # Need to grow children array
+    while result.children.len <= childIdx:
-      let oldLen = result.children.len
+      result.children.add(newInternalNode[T]())
-      result.children.setLen(childIdx + 1)
+
-      for i in oldLen..<childIdx:
-        result.children[i] = nil
-    
     var child = result.children[childIdx]
     if child.isNil:
       if shift == BRANCHING_BITS:
@@ -96,7 +92,7 @@ proc pushLeaf[T](node: PVecNode[T], index: int, shift: int, val: seq[T]): PVecNo
         child = pushLeaf(newInternalNode[T](), index, shift - BRANCHING_BITS, val)
     else:
       child = pushLeaf(child, index, shift - BRANCHING_BITS, val)
-    
+
     result.children[childIdx] = child
 
 proc pvecConj*[T](v: PersistentVector[T], val: T): PersistentVector[T] =

src/cljnim.nim

@@ -1,6 +1,6 @@
 # Bara Lang — AI-First Compiler
-import os, osproc, strutils, times
+import os, osproc, strutils, times, tables
-import reader, emitter, types, repl, macros, deps, ai_assist, tui
+import reader, emitter, types, repl, macros, deps, ai_assist, tui, project
 
 var libPathOverride* = ""
 
@@ -65,7 +65,7 @@ proc extractRequires(forms: seq[CljVal]): seq[(string, string)] =
     walk(form)
   return res
 
-proc compileFileInternal(inputPath: string, outputPath: string, extraPaths: seq[string] = @[], libMode: bool = false) =
+proc compileFileInternal(inputPath: string, outputPath: string, extraPaths: seq[string] = @[], libMode: bool = false, entryProcName: string = "", libs: Table[string, string] = initTable[string, string]()) =
   let source = readFile(inputPath)
   let forms = reader.readAll(source)
 
@@ -88,10 +88,17 @@ proc compileFileInternal(inputPath: string, outputPath: string, extraPaths: seq[
   var allForms: seq[CljVal] = @[]
   var visited: seq[string] = @[]
   var nsAliases: seq[(string, string)] = @[]  # (alias, namespace)
+  var libImports: seq[string] = @[]
   
   proc resolveFile(nsName: string) =
     if nsName in visited: return
     visited.add(nsName)
+    if libs.hasKey(nsName):
+      # Use pre-compiled lib module instead of inlining
+      let nimModule = libs[nsName]
+      if nimModule notin libImports:
+        libImports.add(nimModule)
+      return
     let path = resolveNsToPath(nsName, searchPaths)
     if path.len == 0:
       stderr.writeLine("Warning: Cannot find file for namespace: " & nsName)
@@ -118,13 +125,37 @@ proc compileFileInternal(inputPath: string, outputPath: string, extraPaths: seq[
   # Set namespace aliases in emitter
   emitter.setNsAliases(nsAliases)
   
+  # Set lib prefixes for qualified name resolution
+  var libPrefixes: seq[string] = @[]
+  for (alias, nsName) in nsAliases:
+    if libs.hasKey(nsName):
+      libPrefixes.add(alias)
+  emitter.setLibNsPrefixes(libPrefixes)
+  
   # Add current file's forms (skip ns declaration)
   for f in forms:
     if not (f.kind == ckList and f.items.len >= 1 and
             f.items[0].kind == ckSymbol and f.items[0].symName == "ns"):
       allForms.add(f)
   
-  let nimCode = if libMode: emitter.emitProgramLib(allForms) else: emitter.emitProgram(allForms)
+  let oldEntryProc = emitter.emitEntryProcName
+  if entryProcName.len > 0:
+    emitter.emitEntryProcName = entryProcName
+  var nimCode = if libMode: emitter.emitProgramLib(allForms) else: emitter.emitProgram(allForms)
+  emitter.emitEntryProcName = oldEntryProc
+
+  # Insert lib imports into generated Nim code
+  if libImports.len > 0:
+    var lines = nimCode.splitLines()
+    var insertIdx = 0
+    for i, line in lines:
+      if line.startsWith("import "):
+        insertIdx = i + 1
+    for imp in libImports:
+      lines.insert("from " & imp & " import nil", insertIdx)
+      insertIdx.inc
+    nimCode = lines.join("\n")
+
   writeFile(outputPath, nimCode)
   echo "Generated: ", outputPath
 
@@ -155,6 +186,269 @@ proc makeTempDir(): string =
   result = getTempDir() / "cljnim_build_" & $pid & "_" & $ts
   createDir(result)
 
+proc sanitizeNimIdent(name: string): string =
+  ## Sanitize a project/bin name to valid Nim module name
+  result = ""
+  for c in name:
+    case c
+    of '-': result.add('_')
+    of 'a'..'z', 'A'..'Z', '0'..'9', '_': result.add(c)
+    else: result.add('_')
+  if result.len == 0:
+    result = "bin"
+
+proc buildLibs(proj: Project, includeExamples: bool, nimDir: string): Table[string, string] =
+  ## Discover and compile all project-local libraries required by bin files.
+  ## Returns mapping: namespace -> nim module name
+  result = initTable[string, string]()
+  var entries = proj.bins
+  if includeExamples:
+    entries.add(proj.examples)
+
+  var visited: seq[string] = @[]
+  var queue: seq[string] = @[]
+  let searchPaths = @[proj.rootDir, proj.rootDir / "lib"]
+
+  # Collect all required namespaces from bin files
+  for entry in entries:
+    let inputPath = proj.rootDir / entry.path
+    if not fileExists(inputPath): continue
+    let forms = reader.readAll(readFile(inputPath))
+    let requires = extractRequires(forms)
+    for (nsName, _) in requires:
+      if nsName notin queue:
+        queue.add(nsName)
+
+  # Iteratively process queue, adding transitive dependencies
+  var i = 0
+  while i < queue.len:
+    let nsName = queue[i]
+    i.inc
+    if nsName in visited: continue
+    visited.add(nsName)
+
+    let path = resolveNsToPath(nsName, searchPaths)
+    if path.len == 0 or not path.startsWith(proj.rootDir):
+      continue  # External dependency, skip
+
+    let forms = reader.readAll(readFile(path))
+    let requires = extractRequires(forms)
+    for (depNs, _) in requires:
+      if depNs notin queue:
+        queue.add(depNs)
+
+  # Compile libs in dependency order (simple topological sort)
+  var remaining = visited
+  while remaining.len > 0:
+    var madeProgress = false
+    var nextRemaining: seq[string] = @[]
+
+    for nsName in remaining:
+      let path = resolveNsToPath(nsName, searchPaths)
+      if path.len == 0 or not path.startsWith(proj.rootDir):
+        continue
+
+      let forms = reader.readAll(readFile(path))
+      let requires = extractRequires(forms)
+
+      var allDepsReady = true
+      var depLibs = initTable[string, string]()
+      for (depNs, _) in requires:
+        if depNs == nsName: continue
+        if result.hasKey(depNs):
+          depLibs[depNs] = result[depNs]
+        else:
+          let depPath = resolveNsToPath(depNs, searchPaths)
+          if depPath.len > 0 and depPath.startsWith(proj.rootDir):
+            allDepsReady = false
+            break
+
+      if allDepsReady:
+        madeProgress = true
+        let nimName = "lib_" & sanitizeNimIdent(nsName.replace(".", "_").replace("-", "_"))
+        let nimPath = nimDir / nimName & ".nim"
+        if not fileExists(nimPath):
+          echo "Building lib: ", nsName, " → ", nimPath
+          compileFileInternal(path, nimPath, @[], true, "", depLibs)
+        result[nsName] = nimName
+      else:
+        nextRemaining.add(nsName)
+
+    if not madeProgress and nextRemaining.len > 0:
+      # Circular dependency or bug, force compile first remaining
+      let nsName = nextRemaining[0]
+      nextRemaining.delete(0)
+      let path = resolveNsToPath(nsName, searchPaths)
+      if path.len > 0 and path.startsWith(proj.rootDir):
+        let nimName = "lib_" & sanitizeNimIdent(nsName.replace(".", "_").replace("-", "_"))
+        let nimPath = nimDir / nimName & ".nim"
+        if not fileExists(nimPath):
+          echo "Building lib (forced): ", nsName, " → ", nimPath
+          compileFileInternal(path, nimPath, @[], true, "", initTable[string, string]())
+        result[nsName] = nimName
+
+    remaining = nextRemaining
+
+proc buildBin(proj: Project, bin: project.BinEntry, outputDir: string, nimDir: string, nimcacheDir: string, release: bool, libs: Table[string, string]) =
+  let inputPath = proj.rootDir / bin.path
+  let nimName = "bin_" & sanitizeNimIdent(bin.name)
+  let nimPath = nimDir / nimName & ".nim"
+  let binPath = outputDir / bin.name
+
+  if not fileExists(inputPath):
+    stderr.writeLine("Warning: Bin file not found: " & inputPath)
+    return
+
+  echo "Building bin: ", bin.name, " → ", binPath
+
+  # Set entry proc name so mono can call it later
+  let oldEntryProc = emitter.emitEntryProcName
+  emitter.emitEntryProcName = "clj_main_" & sanitizeNimIdent(bin.name)
+  defer: emitter.emitEntryProcName = oldEntryProc
+
+  compileFileInternal(inputPath, nimPath, @[], false, "", libs)
+
+  let libPath = getLibPath()
+  let compilerLib = getAppDir() / "lib"
+  var cmd = "nim c"
+  if release:
+    cmd.add(" -d:release")
+  if dirExists(compilerLib) and compilerLib != libPath:
+    cmd.add(" --path:" & quoteShell(compilerLib))
+  cmd.add(" --path:" & quoteShell(libPath))
+  cmd.add(" --path:" & quoteShell(nimDir))
+  cmd.add(" --nimcache:" & quoteShell(nimcacheDir))
+  cmd.add(" -o:" & quoteShell(binPath) & " " & quoteShell(nimPath))
+  echo "  ", cmd
+  let (output, exitCode) = execCmdEx(cmd)
+  if exitCode != 0:
+    stderr.writeLine("Compilation failed for ", bin.name)
+    stderr.writeLine(output)
+    quit(1)
+  echo "  ✓ ", binPath
+
+proc buildProject(proj: Project, release: bool, includeExamples: bool) =
+  let targetDir = proj.rootDir / "target"
+  let nimDir = targetDir / "nim"
+  let binDir = targetDir / "bin"
+  let nimcacheDir = targetDir / "nimcache"
+  createDir(nimDir)
+  createDir(binDir)
+  createDir(nimcacheDir)
+
+  echo "Building project: ", proj.name, " v", proj.version
+  echo "  Root: ", proj.rootDir
+  echo "  Bins: ", proj.bins.len
+
+  let libs = buildLibs(proj, includeExamples, nimDir)
+  if libs.len > 0:
+    echo "  Libs: ", libs.len
+
+  for bin in proj.bins:
+    buildBin(proj, bin, binDir, nimDir, nimcacheDir, release, libs)
+
+  if includeExamples:
+    echo "  Examples: ", proj.examples.len
+    for ex in proj.examples:
+      buildBin(proj, ex, binDir, nimDir, nimcacheDir, release, libs)
+
+proc buildMono(proj: Project, release: bool, includeExamples: bool) =
+  let targetDir = proj.rootDir / "target"
+  let nimDir = targetDir / "nim"
+  let binDir = targetDir / "bin"
+  let nimcacheDir = targetDir / "nimcache"
+  createDir(nimDir)
+  createDir(binDir)
+  createDir(nimcacheDir)
+
+  var entries: seq[project.BinEntry] = proj.bins
+  if includeExamples:
+    entries.add(proj.examples)
+
+  echo "Building mono binary: ", proj.name
+  echo "  Entries: ", entries.len
+
+  let libs = buildLibs(proj, includeExamples, nimDir)
+  if libs.len > 0:
+    echo "  Libs: ", libs.len
+
+  # First compile each entry to a Nim module with exported entry proc
+  var imports: seq[string] = @[]
+  var cases: seq[string] = @[]
+
+  for entry in entries:
+    let inputPath = proj.rootDir / entry.path
+    let nimName = "bin_" & sanitizeNimIdent(entry.name)
+    let nimPath = nimDir / nimName & ".nim"
+
+    if not fileExists(inputPath):
+      stderr.writeLine("Warning: Entry file not found: " & inputPath)
+      continue
+
+    echo "  Generating module: ", nimName
+
+    let oldEntryProc = emitter.emitEntryProcName
+    emitter.emitEntryProcName = "clj_main_" & sanitizeNimIdent(entry.name)
+    defer: emitter.emitEntryProcName = oldEntryProc
+
+    compileFileInternal(inputPath, nimPath, @[], false, "", libs)
+    imports.add(nimName)
+    cases.add("  of \"" & entry.name & "\": discard " & "clj_main_" & sanitizeNimIdent(entry.name) & "()")
+
+  if imports.len == 0:
+    stderr.writeLine("Error: No valid entries to build")
+    quit(1)
+
+  # Generate mono wrapper
+  let monoName = sanitizeNimIdent(proj.name)
+  let monoNimPath = nimDir / "mono.nim"
+  var monoCode = "# Generated by Bara Lang — Mono Binary Wrapper\n"
+  monoCode.add("import os\n")
+  monoCode.add("import cljnim_runtime\n")
+  for imp in imports:
+    monoCode.add("import " & imp & "\n")
+  monoCode.add("\nproc main() =\n")
+  monoCode.add("  if paramCount() < 1:\n")
+  monoCode.add("    echo \"Usage: " & proj.name & " <command>\"\n")
+  monoCode.add("    echo \"Commands:\"\n")
+  for entry in entries:
+    if fileExists(proj.rootDir / entry.path):
+      monoCode.add("    echo \"  " & entry.name & "\"\n")
+  monoCode.add("    quit(1)\n")
+  monoCode.add("  let cmd = paramStr(1)\n")
+  monoCode.add("  case cmd\n")
+  for c in cases:
+    monoCode.add(c & "\n")
+  monoCode.add("  else:\n")
+  monoCode.add("    echo \"Unknown command: \" & cmd\n")
+  monoCode.add("    quit(1)\n")
+  monoCode.add("\nwhen isMainModule:\n")
+  monoCode.add("  main()\n")
+
+  writeFile(monoNimPath, monoCode)
+  echo "  Generated: ", monoNimPath
+
+  # Compile mono wrapper
+  let monoBinPath = binDir / monoName
+  let libPath = getLibPath()
+  let compilerLib = getAppDir() / "lib"
+  var cmd = "nim c"
+  if release:
+    cmd.add(" -d:release")
+  if dirExists(compilerLib) and compilerLib != libPath:
+    cmd.add(" --path:" & quoteShell(compilerLib))
+  cmd.add(" --path:" & quoteShell(libPath))
+  cmd.add(" --path:" & quoteShell(nimDir))
+  cmd.add(" --nimcache:" & quoteShell(nimcacheDir))
+  cmd.add(" -o:" & quoteShell(monoBinPath) & " " & quoteShell(monoNimPath))
+  echo "  Compiling mono: ", cmd
+  let (output, exitCode) = execCmdEx(cmd)
+  if exitCode != 0:
+    stderr.writeLine("Compilation failed for mono binary")
+    stderr.writeLine(output)
+    quit(1)
+  echo "  ✓ ", monoBinPath
+
 proc runFile*(inputPath: string) =
   let baseName = inputPath.splitFile.name
   let buildDir = makeTempDir()
@@ -238,6 +532,7 @@ proc main() =
     echo "  cljnim [--lib-path <dir>] compile <file.clj> [output.nim]"
     echo "  cljnim [--lib-path <dir>] run <file.clj>"
     echo "  cljnim [--lib-path <dir>] read <file.clj>"
+    echo "  cljnim build [--mono] [--release] [--examples]"
     echo "  cljnim repl [--json]"
     echo "  cljnim deps"
     echo "  cljnim -e '<code>'"
@@ -272,6 +567,7 @@ proc main() =
     let nimPath = buildDir / "expr.nim"
     let binPath = buildDir / "expr"
     let forms = reader.readAll(code)
+    emitter.emitEntryProcName = ""
     let nimCode = emitter.emitProgram(forms)
     writeFile(nimPath, nimCode)
     let (compileResult, compileOut) = nimCompile(nimPath, binPath)
@@ -296,6 +592,23 @@ proc main() =
     let outputPath = if args.len >= 3: args[2] else: inputPath.changeFileExt("nim")
     compileFile(inputPath, outputPath)
 
+  of "build":
+    var monoMode = false
+    var releaseMode = false
+    var includeExamples = false
+    for i in 1..<args.len:
+      if args[i] == "--mono":
+        monoMode = true
+      elif args[i] == "--release":
+        releaseMode = true
+      elif args[i] == "--examples":
+        includeExamples = true
+    let proj = project.loadProject()
+    if monoMode:
+      buildMono(proj, releaseMode, includeExamples)
+    else:
+      buildProject(proj, releaseMode, includeExamples)
+
   of "compile-lib":
     if args.len < 2:
       stderr.writeLine("Error: Missing input file")

src/core.nim

@@ -277,7 +277,7 @@ proc cljConj*(coll: CljVal, item: CljVal): CljVal =
   of ckVector:
     var newItems = coll.listItems
     newItems.add(item)
-    cljList(newItems)
+    cljVector(newItems)
   else:
     cljList(@[item])
 
@@ -315,11 +315,11 @@ proc cljSeq*(v: CljVal): CljVal =
   else: cljNil()
 
 proc cljVec*(v: CljVal): CljVal =
-  if v.isNil: return cljList(@[])
+  if v.isNil: return cljVector(@[])
   case v.kind
-  of ckList: cljList(v.listItems)
+  of ckList: cljVector(v.listItems)
   of ckVector: v
-  else: cljList(@[v])
+  else: cljVector(@[v])
 
 proc cljEmpty*(v: CljVal): CljVal =
   cljBool(cljCount(v) == 0)
@@ -430,18 +430,39 @@ proc cljType*(v: CljVal): CljVal =
   of ckList: cljKeyword("list")
   of ckVector: cljKeyword("vector")
   of ckMap: cljKeyword("map")
+  of ckSet: cljKeyword("set")
   of ckFn: cljKeyword("function")
   of ckAtom: cljKeyword("atom")
+  of ckTransient: cljKeyword("transient")
+  of ckAgent: cljKeyword("agent")
 
 proc cljMinMax*(args: seq[CljVal], isMin: bool): CljVal =
   if args.len == 0: raise newException(CatchableError, "min/max requires at least 1 argument")
   result = args[0]
   for i in 1..<args.len:
-    if args[i].kind == ckInt and result.kind == ckInt:
+    let a = args[i]
+    if a.kind == ckInt and result.kind == ckInt:
       if isMin:
-        if args[i].intVal < result.intVal: result = args[i]
+        if a.intVal < result.intVal: result = a
       else:
-        if args[i].intVal > result.intVal: result = args[i]
+        if a.intVal > result.intVal: result = a
+    elif a.kind == ckFloat and result.kind == ckFloat:
+      if isMin:
+        if a.floatVal < result.floatVal: result = a
+      else:
+        if a.floatVal > result.floatVal: result = a
+    elif a.kind == ckInt and result.kind == ckFloat:
+      let af = a.intVal.float64
+      if isMin:
+        if af < result.floatVal: result = a
+      else:
+        if af > result.floatVal: result = a
+    elif a.kind == ckFloat and result.kind == ckInt:
+      let rf = result.intVal.float64
+      if isMin:
+        if a.floatVal < rf: result = a
+      else:
+        if a.floatVal > rf: result = a
 
 proc cljAbs*(v: CljVal): CljVal =
   case v.kind

src/emitter.nim

@@ -5,6 +5,7 @@ import macros
 
 var requiredImports* = initHashSet[string]()
 var emitLibMode* = false
+var emitEntryProcName* = ""
 var loopStack*: seq[seq[string]] = @[]
 var nsAliases*: seq[(string, string)] = @[]  # (alias, namespace)
 var scopeStack*: seq[HashSet[string]] = @[]
@@ -82,6 +83,21 @@ proc clearGlobals*() =
 proc setNsAliases*(aliases: seq[(string, string)]) =
   nsAliases = aliases
 
+var libNsPrefixes*: seq[string] = @[]
+
+proc setLibNsPrefixes*(prefixes: seq[string]) =
+  libNsPrefixes = prefixes
+
+proc sanitizeNimIdent*(name: string): string
+
+proc nsToNimModuleName(ns: string): string =
+  result = "lib_"
+  for c in ns:
+    case c
+    of '.', '-': result.add('_')
+    of 'a'..'z', 'A'..'Z', '0'..'9', '_': result.add(c)
+    else: result.add('_')
+
 proc resolveNsAlias*(name: string): string =
   # Resolve mu/square -> square (strip namespace prefix if alias exists)
   let slashIdx = name.find('/')
@@ -90,6 +106,9 @@ proc resolveNsAlias*(name: string): string =
   let suffix = name[slashIdx+1..^1]
   for (alias, ns) in nsAliases:
     if prefix == alias:
+      if prefix in libNsPrefixes:
+        # Return fully qualified name for lib module symbols
+        return nsToNimModuleName(ns) & ".clj_" & sanitizeNimIdent(suffix)
       return suffix
   return name
 
@@ -130,6 +149,10 @@ proc sanitizeNimIdent*(name: string): string =
     result = "x" & result
   if result.len == 0:
     result = "val"
+  # Avoid conflicts with runtime functions: all-uppercase short names (GET, POST, etc)
+  # get a suffix so they don't collide with cljGet, cljSet, etc.
+  if result.len > 0 and result.allCharsInSet({'A'..'Z', '_'}) and result.len <= 7:
+    result.add("X")
   # Nim keywords that would clash
   let nimKeywords = ["in", "out", "var", "let", "proc", "func", "type", "ref", "ptr",
                      "object", "method", "template", "macro", "iterator", "converter",
@@ -732,7 +755,8 @@ proc emitSpecialForm(items: seq[CljVal], indent: int, needsValue: bool = false):
         let mangled = mangleName(nameItem.symName)
         registerGlobal(nameItem.symName)
         let valCode = emitExpr(valItem, 0, needsValue = true)
-        return sp & "let " & mangled & " = " & valCode
+        let exportMarker = if emitLibMode: "*" else: ""
+        return sp & "let " & mangled & exportMarker & " = " & valCode
       return sp & "cljNil()"
     var name = items[1]
     # Strip metadata: (with-meta sym meta) -> sym
@@ -748,6 +772,7 @@ proc emitSpecialForm(items: seq[CljVal], indent: int, needsValue: bool = false):
     # Special handling: (def name (fn ...)) should emit raw proc, not cljFn wrapper
     let isFnDef = valForm.kind == ckList and valForm.items.len > 0 and
                   valForm.items[0].kind == ckSymbol and valForm.items[0].symName == "fn"
+    let exportMarker = if emitLibMode: "*" else: ""
     if indent == 0:
       if isFnDef:
         # Emit fn as raw proc for def context
@@ -755,9 +780,9 @@ proc emitSpecialForm(items: seq[CljVal], indent: int, needsValue: bool = false):
         emitLibMode = false
         let valCode = emitFnAsProc(valForm.items, 0)
         emitLibMode = oldEmitLibMode
-        return sp & "let " & mangled & " = " & valCode
+        return sp & "let " & mangled & exportMarker & " = " & valCode
       let valCode = emitExpr(items[2], 0, needsValue = true)
-      return sp & "let " & mangled & " = " & valCode
+      return sp & "let " & mangled & exportMarker & " = " & valCode
     else:
       # For nested def: use global var so it's accessible from closures
       if isFnDef:
@@ -765,9 +790,9 @@ proc emitSpecialForm(items: seq[CljVal], indent: int, needsValue: bool = false):
         emitLibMode = false
         let valCode = emitFnAsProc(valForm.items, indent)
         emitLibMode = oldEmitLibMode
-        return sp & "var " & mangled & " = " & valCode.strip() & "\n" & sp & mangled
+        return sp & "var " & mangled & exportMarker & " = " & valCode.strip() & "\n" & sp & mangled
       let valCode = emitExpr(items[2], indent, needsValue = true)
-      return sp & "var " & mangled & " = " & valCode.strip() & "\n" & sp & mangled
+      return sp & "var " & mangled & exportMarker & " = " & valCode.strip() & "\n" & sp & mangled
 
   of "defn":
     if items.len < 3:
@@ -896,7 +921,14 @@ proc emitSpecialForm(items: seq[CljVal], indent: int, needsValue: bool = false):
       else:
         bodyCode = emitBlock(body, indent + 1)
       popScope()
-      return sp & "proc " & procName & exportMarker & "(" & paramNames.join(", ") & "): CljVal =\n" & bodyCode
+      var result = sp & "proc " & procName & exportMarker & "(" & paramNames.join(", ") & "): CljVal =\n" & bodyCode
+      if emitLibMode and paramNames.len > 0 and not (name.symName in multiArityFns):
+        var wrapperArgs: seq[string] = @[]
+        for i in 0..<paramNames.len:
+          wrapperArgs.add("args[" & $i & "]")
+        result.add("\n" & sp & "proc " & procName & exportMarker & "(args: seq[CljVal]): CljVal =\n")
+        result.add(indentStr(indent + 1) & procName & "(" & wrapperArgs.join(", ") & ")\n")
+      return result
     else:
       var bodyCode = ""
       if body.len == 1:
@@ -2181,6 +2213,10 @@ proc emitSpecialForm(items: seq[CljVal], indent: int, needsValue: bool = false):
     var callOp = op
     if callOp.endsWith("."):
       callOp = callOp[0..^2]
+    let baseOp = if callOp.contains("/"): callOp.split("/")[1] else: callOp
+    let resolvedOp = resolveNsAlias(callOp)
+    if resolvedOp.contains("."):
+      return sp & resolvedOp & "(@[" & args.join(", ") & "])"
     let mangled = mangleName(callOp)
     # Multi-arity function: wrap args in seq
     if callOp in multiArityFns:
@@ -2247,6 +2283,9 @@ proc emitExpr*(v: CljVal, indent: int = 0, needsValue: bool = false): string =
     return sp & "cljKeyword(\"" & v.kwName & "\")"
   of ckSymbol:
     let symName = resolveNsAlias(v.symName)
+    # If symName contains a dot, it's a fully qualified lib module reference
+    if symName.contains("."):
+      return sp & symName
     let rn = runtimeName(symName)
     if rn.len > 0 and not isLocalVar(symName):
       # Check if the runtime function is variadic (takes seq[CljVal])
@@ -2355,6 +2394,13 @@ proc emitProgramInternal(forms: seq[CljVal]): string =
   scopeStack = @[]
   pushScope()
   requiredImports = initHashSet[string]()
+  loopStack = @[]
+  loopResultVar = ""
+  nsAliases = @[]
+  libNsPrefixes = @[]
+  definedGlobals = initHashSet[string]()
+  definedFnArities = initTable[string, int]()
+  multiArityFns = initHashSet[string]()
   var headerLines: seq[string] = @[
     "# Generated by Bara Lang",
     "import cljnim_runtime",
@@ -2443,9 +2489,17 @@ proc emitProgramInternal(forms: seq[CljVal]): string =
       for form in mainForms:
         lines.add(form)
     else:
-      lines.add("when isMainModule:")
+      if emitEntryProcName.len > 0:
-      for form in mainForms:
+        lines.add("proc " & emitEntryProcName & "*(args: seq[CljVal] = @[]): CljVal =")
-        lines.add(form)
+        for form in mainForms:
+          lines.add(form)
+        lines.add("")
+        lines.add("when isMainModule:")
+        lines.add("  discard " & emitEntryProcName & "()")
+      else:
+        lines.add("when isMainModule:")
+        for form in mainForms:
+          lines.add(form)
 
   return lines.join("\n") & "\n"
 

src/eval.nim

@@ -725,9 +725,10 @@ proc evalList(items: seq[CljVal], env: Env): EvalResult =
         coll = args[2]
       else:
         coll = args[1]
-        if coll.kind in {ckList, ckVector} and coll.items.len > 0:
+        if coll.kind in {ckList, ckVector}:
+          if coll.items.len == 0:
+            return EvalResult(ok: false, error: "reduce of empty collection with no initial value")
           acc = coll.items[0]
-          # reduce rest
           var res = acc
           for i in 1..<coll.items.len:
             let callItems = @[fn, res, coll.items[i]]
@@ -920,12 +921,6 @@ proc evalList(items: seq[CljVal], env: Env): EvalResult =
         of ckAgent: "agent"
       return EvalResult(ok: true, value: cljKeyword(typeName))
 
-    of "not":
-      numArgs(1)
-      let isFalsy = args[0].kind == ckNil or
-        (args[0].kind == ckBool and not args[0].boolVal)
-      return EvalResult(ok: true, value: cljBool(isFalsy))
-
     of "abs":
       numArgs(1)
       if args[0].kind == ckInt:
@@ -953,7 +948,7 @@ proc evalList(items: seq[CljVal], env: Env): EvalResult =
       if args[0].kind == ckInt and args[1].kind == ckInt:
         if args[1].intVal == 0:
           return EvalResult(ok: false, error: "Division by zero")
-        return EvalResult(ok: true, value: cljInt(args[0].intVal mod args[1].intVal))
+        return EvalResult(ok: true, value: cljInt(args[0].intVal - (args[0].intVal div args[1].intVal) * args[1].intVal))
       return EvalResult(ok: false, error: "rem requires integers")
 
     of "min":
@@ -984,9 +979,16 @@ proc evalList(items: seq[CljVal], env: Env): EvalResult =
       if args.len == 3 and args[0].kind == ckInt and args[1].kind == ckInt and args[2].kind == ckInt:
         var items: seq[CljVal] = @[]
         var i = args[0].intVal
-        while i < args[1].intVal:
+        let step = args[2].intVal
-          items.add(cljInt(i))
+        let endVal = args[1].intVal
-          i += args[2].intVal
+        if step > 0:
+          while i < endVal:
+            items.add(cljInt(i))
+            i += step
+        elif step < 0:
+          while i > endVal:
+            items.add(cljInt(i))
+            i += step
         return EvalResult(ok: true, value: cljList(items))
       return EvalResult(ok: false, error: "range requires integers")
 
@@ -1132,7 +1134,8 @@ proc evalList(items: seq[CljVal], env: Env): EvalResult =
       let currentVal = atomRegistry[args[0].strVal]
       var callItems = @[fn, currentVal]
       if args.len > 2:
-        callItems.add(args[2..^1])
+        for extra in args[2..^1]:
+          callItems.add(extra)
       let callRes = evalList(callItems, env)
       if not callRes.ok: return callRes
       atomRegistry[args[0].strVal] = callRes.value

src/macros.nim

@@ -428,8 +428,7 @@ proc initMacros*() =
       if whileExpr != nil:
         let gs = cljSymbol(gensymName("dw_"))
         b = @[cljList(@[cljSymbol("loop"), cljVector(@[gs, cljBool(true)]),
-          cljList(@[cljSymbol("when"), whileExpr] & b & @[cljList(@[cljSymbol("recur"), gs])]),
+          cljList(@[cljSymbol("when"), whileExpr] & b & @[cljList(@[cljSymbol("recur"), gs])])])]
-          cljList(@[cljSymbol("when"), cljBool(false), cljNil()])])]
       return cljList(@[cljSymbol("do")] & b)
     
     # Build nested doseq for multiple pairs, innermost gets the body with modifiers
@@ -438,11 +437,10 @@ proc initMacros*() =
       inner = @[cljList(@[cljSymbol("let"), cljVector(letBinds)] & inner)]
     if whenExpr != nil:
       inner = @[cljList(@[cljSymbol("when"), whenExpr] & inner)]
-      if whileExpr != nil:
+    if whileExpr != nil:
-        let gs = cljSymbol(gensymName("dw_"))
+      let gs = cljSymbol(gensymName("dw_"))
-        inner = @[cljList(@[cljSymbol("loop"), cljVector(@[gs, cljBool(true)]),
+      inner = @[cljList(@[cljSymbol("loop"), cljVector(@[gs, cljBool(true)]),
-          cljList(@[cljSymbol("when"), whileExpr] & inner & @[cljList(@[cljSymbol("recur"), gs])]),
+        cljList(@[cljSymbol("when"), whileExpr] & inner & @[cljList(@[cljSymbol("recur"), gs])])])]
-          cljList(@[cljSymbol("when"), cljBool(false), cljNil()])])]
     
     proc makeLoop(name: CljVal, coll: CljVal, innerBody: seq[CljVal]): CljVal =
       if name.kind == ckVector:
@@ -606,5 +604,9 @@ proc initMacros*() =
     return cljList(@[cljSymbol("do")] & body)
   )
 
+var macrosInitialized = false
+
 proc initBuiltinMacros*() =
+  if macrosInitialized: return
   initMacros()
+  macrosInitialized = true

src/project.nim

@@ -0,0 +1,99 @@
+# Bara Lang Project Manifest Reader
+# Reads bara.edn (Clojure/EDN format) for project configuration
+import os
+import types, reader
+
+type
+  BinEntry* = object
+    name*: string
+    path*: string
+
+  LibEntry* = object
+    name*: string
+    path*: string
+
+  Project* = object
+    name*: string
+    version*: string
+    rootDir*: string
+    lib*: LibEntry
+    bins*: seq[BinEntry]
+    examples*: seq[BinEntry]
+
+proc findProjectRoot*(startDir: string = getCurrentDir()): string =
+  ## Walk up from startDir looking for bara.edn
+  var dir = absolutePath(startDir)
+  while true:
+    let baraEdn = dir / "bara.edn"
+    if fileExists(baraEdn):
+      return dir
+    let parent = parentDir(dir)
+    if parent == dir:
+      break
+    dir = parent
+  return ""
+
+proc extractMapString(form: CljVal, key: string, defaultVal: string = ""): string =
+  if form.kind != ckMap: return defaultVal
+  for i in 0..<form.mapKeys.len:
+    let k = form.mapKeys[i]
+    if (k.kind == ckKeyword and k.kwName == key) or (k.kind == ckSymbol and k.symName == key):
+      let v = form.mapVals[i]
+      if v.kind == ckString: return v.strVal
+  return defaultVal
+
+proc extractMapVector(form: CljVal, key: string): seq[CljVal] =
+  if form.kind != ckMap: return @[]
+  for i in 0..<form.mapKeys.len:
+    let k = form.mapKeys[i]
+    if (k.kind == ckKeyword and k.kwName == key) or (k.kind == ckSymbol and k.symName == key):
+      let v = form.mapVals[i]
+      if v.kind == ckVector: return v.items
+      if v.kind == ckList: return v.items
+  return @[]
+
+proc parseBinEntry(form: CljVal): BinEntry =
+  result.name = extractMapString(form, "name")
+  result.path = extractMapString(form, "path")
+
+proc parseLibEntry(form: CljVal): LibEntry =
+  result.name = extractMapString(form, "name")
+  result.path = extractMapString(form, "path")
+
+proc loadProject*(dir: string = getCurrentDir()): Project =
+  let root = findProjectRoot(dir)
+  if root.len == 0:
+    raise newException(ValueError, "bara.edn not found in " & dir & " or parent directories")
+
+  let path = root / "bara.edn"
+  let source = readFile(path)
+  let forms = reader.readAll(source)
+  if forms.len == 0:
+    raise newException(ValueError, "Empty bara.edn")
+
+  let map = forms[0]
+  if map.kind != ckMap:
+    raise newException(ValueError, "bara.edn must contain a map at top level")
+
+  result.rootDir = root
+  result.name = extractMapString(map, "name", "unknown")
+  result.version = extractMapString(map, "version", "0.1.0")
+
+  let libVal = extractMapVector(map, "lib")
+  if libVal.len > 0:
+    result.lib = parseLibEntry(libVal[0])
+  elif true:
+    # Also check for single :lib map (not vector)
+    for i in 0..<map.mapKeys.len:
+      let k = map.mapKeys[i]
+      if (k.kind == ckKeyword and k.kwName == "lib") or (k.kind == ckSymbol and k.symName == "lib"):
+        let v = map.mapVals[i]
+        if v.kind == ckMap:
+          result.lib = parseLibEntry(v)
+          break
+
+  for item in extractMapVector(map, "bins"):
+    result.bins.add(parseBinEntry(item))
+
+  for item in extractMapVector(map, "examples"):
+    result.examples.add(parseBinEntry(item))

src/reader.nim

@@ -227,6 +227,20 @@ proc readAtom(s: string, i: var int): CljVal =
       except CatchableError:
         return cljSymbol(tok)
 
+  # Check for ratio literal like 1/5, -1/5, 3/4
+  let slashPos = numTok.find('/')
+  if slashPos > 0 and slashPos < numTok.len - 1:
+    let numerStr = numTok[0..<slashPos]
+    let denomStr = numTok[slashPos+1..^1]
+    try:
+      let numer = parseInt(numerStr)
+      let denom = parseInt(denomStr)
+      if denom != 0:
+        return cljList(@[cljSymbol("/"), cljInt(numer.int64), cljInt(denom.int64)])
+    except CatchableError:
+      discard
+    return cljSymbol(tok)
+
   # number
   var isFloat = false
   var isNumber = true
@@ -252,8 +266,8 @@ proc readAtom(s: string, i: var int): CljVal =
       if j + 1 < numTok.len and (numTok[j+1] == '-' or numTok[j+1] == '+'):
         discard  # skip exponent sign
     elif numTok[j] notin Digits:
-      if sawExp and (tok[j] == '-' or tok[j] == '+'):
+      if sawExp and (numTok[j] == '-' or numTok[j] == '+'):
-        if j > 0 and (tok[j-1] == 'e' or tok[j-1] == 'E'):
+        if j > 0 and (numTok[j-1] == 'e' or numTok[j-1] == 'E'):
           continue
       isNumber = false
       break
@@ -354,7 +368,7 @@ proc readMap(s: string, i: var int): CljVal =
   return cljMapFromPairs(pairs)
 
 proc readSet(s: string, i: var int): CljVal =
-  inc i  # skip '{' after # 
+  inc i  # skip '{' after #
   var items: seq[CljVal] = @[]
   while true:
     skipWhitespaceAndComments(s, i)
@@ -366,7 +380,7 @@ proc readSet(s: string, i: var int): CljVal =
     let form = readForm(s, i)
     if form != nil:
       items.add(form)
-  return cljList(@[cljSymbol("set"), cljVector(items)])
+  return cljSet(items)
 
 proc readDispatch(s: string, i: var int): CljVal =
   inc i  # skip '#'

src/repl.nim

@@ -528,8 +528,14 @@ proc handleClient(state: var ReplState, client: Socket) =
         client.send($(%*{ "status": "error", "error": { "type": "repl/unknown-op", "message": "Unknown op: " & op } }) & "\n")
     except EOFError:
       break
-    except:
+    except CatchableError as e:
-      client.send($(%*{ "status": "error", "error": { "type": "repl/protocol-error", "message": "Protocol error" } }) & "\n")
+      client.send($(%*{ "status": "error", "error": { "type": "repl/protocol-error", "message": e.msg } }) & "\n")
+      break
+    except ValueError as e:
+      client.send($(%*{ "status": "error", "error": { "type": "repl/parse-error", "message": e.msg } }) & "\n")
+      break
+    except OSError as e:
+      client.send($(%*{ "status": "error", "error": { "type": "repl/io-error", "message": e.msg } }) & "\n")
       break
   client.close()