feat(cli): add --lib-path flag and unify getLibPath logic

- Add --lib-path <dir> global CLI flag (parsed before subcommand)
- getLibPath() now checks CLI override first, then CLJNIM_LIB_PATH env,
  then current dir lib/, then app dir lib/
- nimCompile always includes compiler runtime lib path so cljnim_runtime
  is found even when --lib-path points to a project-specific directory
- Sync repl.nim getLibPath() to match cljnim.nim (env var + current dir)

src/cljnim.nim

@@ -2,8 +2,13 @@
 import os, osproc, strutils, times
 import reader, emitter, types, repl, macros, deps, ai_assist, tui
 
+var libPathOverride* = ""
+
 proc getLibPath(): string =
-  # Check environment variable first
+  # CLI --lib-path takes highest precedence
+  if libPathOverride.len > 0 and dirExists(libPathOverride):
+    return libPathOverride
+  # Check environment variable
   let envPath = getEnv("CLJNIM_LIB_PATH", "")
   if envPath.len > 0 and dirExists(envPath):
     return envPath
@@ -131,9 +136,13 @@ proc compileFileLib*(inputPath: string, outputPath: string, extraPaths: seq[stri
 
 proc nimCompile(nimPath: string, binPath: string, release: bool = false): tuple[exitCode: int, output: string] =
   let libPath = getLibPath()
+  let compilerLib = getAppDir() / "lib"
   var cmd = "nim c"
   if release:
     cmd.add(" -d:release")
+  # Always include compiler runtime lib so cljnim_runtime is found
+  if dirExists(compilerLib) and compilerLib != libPath:
+    cmd.add(" --path:" & quoteShell(compilerLib))
   cmd.add(" --path:" & quoteShell(libPath))
   cmd.add(" -o:" & quoteShell(binPath) & " " & quoteShell(nimPath))
   echo "Compiling: ", cmd
@@ -215,20 +224,29 @@ proc runFile*(inputPath: string) =
 
 proc main() =
   initBuiltinMacros()
-  let args = commandLineParams()
+  var args = commandLineParams()
-  
+
+  # Strip leading global flags
+  if args.len >= 2 and args[0] == "--lib-path":
+    libPathOverride = args[1]
+    args = args[2..^1]
+
   if args.len == 0:
     echo "Bara Lang — AI-First Compiler"
     echo ""
     echo "Usage:"
-    echo "  cljnim compile <file.clj> [output.nim]   Compile to Nim source"
+    echo "  cljnim [--lib-path <dir>] compile <file.clj> [output.nim]"
-    echo "  cljnim run <file.clj>                    Compile and run binary"
+    echo "  cljnim [--lib-path <dir>] run <file.clj>"
-    echo "  cljnim read <file.clj>                   Parse and print AST"
+    echo "  cljnim [--lib-path <dir>] read <file.clj>"
-    echo "  cljnim repl [--json]                     Start REPL (human or AI mode)"
+    echo "  cljnim repl [--json]"
-    echo "  cljnim deps                              Resolve dependencies from deps.edn"
+    echo "  cljnim deps"
-    echo "  cljnim -e '<code>'                       Evaluate expression"
+    echo "  cljnim -e '<code>'"
-    echo "  cljnim ai '<description>'                Generate Bara Lang code with AI"
+    echo "  cljnim ai '<description>'"
-    echo "  cljnim tui                               Start interactive TUI"
+    echo "  cljnim tui"
+    echo ""
+    echo "Global Options:"
+    echo "  --lib-path <dir>    Additional Nim library search path"
+    echo "                      (also via CLJNIM_LIB_PATH env var)"
     echo ""
     echo "REPL Commands:"
     echo "  :quit, :q       Exit REPL"
@@ -241,7 +259,7 @@ proc main() =
     echo "  Input:  {\"op\":\"eval\",\"form\":\"(+ 1 2)\"}"
     echo "  Output: {\"status\":\"ok\",\"result\":{...},\"meta\":{...}}"
     quit(0)
-  
+
   let cmd = args[0]
   
   # Handle -e flag

src/repl.nim

@@ -16,13 +16,18 @@ type
     evalEnv*: Env
 
 proc getLibPath(): string =
+  # Check environment variable first
+  let envPath = getEnv("CLJNIM_LIB_PATH", "")
+  if envPath.len > 0 and dirExists(envPath):
+    return envPath
+  # Check current directory's lib first (project-local libs)
+  let candidate0 = getCurrentDir() / "lib"
+  if dirExists(candidate0): return candidate0
   let appDir = getAppDir()
   let candidate1 = appDir / "lib"
   let candidate2 = appDir.parentDir / "lib"
-  let candidate3 = getCurrentDir() / "lib"
   if dirExists(candidate1): return candidate1
   if dirExists(candidate2): return candidate2
-  if dirExists(candidate3): return candidate3
   return "lib"
 
 proc initReplState*(mode: ReplMode): ReplState =