diff --git a/src/bridge.cj b/src/bridge.cj
index cc7a16f..782d508 100644
--- a/src/bridge.cj
+++ b/src/bridge.cj
@@ -72,7 +72,7 @@ public class LuaError <: Exception {
         match (code) {
             case 5001 => "JSON file load failed"
             case 5002 => "Memory allocation failed"
-            case 5003 => "File load error (permission or path issue)"
+            case 5003 => "File load error (path, permission, or compile-time syntax issue)"
             case 5004 => "Script runner initialization failed"
             case 5005 => "Lua state machine initialization failed or corrupted"
             case 5006 => "JSON parse error (format issue)"
@@ -91,7 +91,7 @@ public class LuaError <: Exception {
             case 5019 => "Reset input file failed, may cause input pollution"
             case 5020 => "Error in callback functions"
             case 5021 => "change workdir error"
-            case 5022 => "Calling func no found"
+            case 5022 => "No callable chunk found"
             case _ => "Unknown error"
         }
     }
@@ -192,9 +192,9 @@ public class LuaRunner {
     /// 运行Lua脚本
     ///
     /// @param path 脚本路径
-    /// @param arg 传递给脚本的参数
+    /// @param arg 传递给脚本的单参数；管道模式下由底层按栈布局自动计算调用参数数量
     /// @return 脚本执行结果字符串
-    /// @throws LuaError 当脚本运行出错时抛出
+    /// @throws LuaError 当脚本编译或运行出错时抛出
     public func runScript(path: String, arg: String): String {
         let pathPtr = toCStr(path)
         let argPtr = toCStr(arg)
diff --git a/src/lua_runner_test.cj b/src/lua_runner_test.cj
index 6c74176..771401e 100644
--- a/src/lua_runner_test.cj
+++ b/src/lua_runner_test.cj
@@ -1,21 +1,23 @@
 package luarunner
 
-import std.unittest.*
-import std.fs.*
+import std.unittest.*  // cjlint-ignore G.PKG.01
+import std.fs.*  // cjlint-ignore G.PKG.01
 
-let scriptsDir = "./test/scripts"
-let generatedScriptsDir = "./test/generated_scripts"
+// cjlint-ignore G.NAM.05
+let SCRIPTS_DIR = "./test/scripts"
+// cjlint-ignore G.NAM.05
+let GENERATED_SCRIPTS_DIR = "./test/generated_scripts"
 
 func scriptPath(name: String): String {
-    scriptsDir + "/" + name
+    SCRIPTS_DIR + "/" + name
 }
 
 func generatedScriptPath(name: String): String {
-    generatedScriptsDir + "/" + name
+    GENERATED_SCRIPTS_DIR + "/" + name
 }
 
 func ensureGeneratedScriptsDir(): Unit {
-    let dir = Path(generatedScriptsDir)
+    let dir = Path(GENERATED_SCRIPTS_DIR)
     if (!exists(dir)) {
         Directory.create(dir, recursive: true)
     }
@@ -53,7 +55,7 @@ func testRunScriptSyntaxError(): Unit {
         runner.runScript(path, "")
         fail("Should throw syntax error")
     } catch (e: LuaError) {
-        @Expect(e.code, 5010)
+        @Expect(e.code, 5003)
     }
 }
 
@@ -203,16 +205,16 @@ func testLoadLibOverflow(): Unit {
 
 @Test
 func testPackagePathConfig(): Unit {
-    let runner = LuaRunner(pkgpath: scriptsDir + "/pkgmods/?.lua")
+    let runner = LuaRunner(pkgpath: SCRIPTS_DIR + "/pkgmods/?.lua")
     let res = runner.runScript(scriptPath("pkgpath_require_mylib.lua"), "")
-    @Expect(res, "LoadedViaPkgPath")
+    @Expect(res, SCRIPTS_DIR + "/pkgmods/mylib.lua")
 }
 
 @Test
 func testPackagePathInitLuaPattern(): Unit {
-    let runner = LuaRunner(pkgpath: scriptsDir + "/pkgmods_init/?/init.lua")
+    let runner = LuaRunner(pkgpath: SCRIPTS_DIR + "/pkgmods_init/?/init.lua")
     let res = runner.runScript(scriptPath("pkgpath_require_nested.lua"), "")
-    @Expect(res, "LoadedViaInit")
+    @Expect(res, SCRIPTS_DIR + "/pkgmods_init/nestedpkg/init.lua")
 }
 
 // ====================
@@ -259,7 +261,9 @@ func testRedirectIoRead(): Unit {
 func testErrorCodesMapping(): Unit {
     @Expect(LuaError.getErrorMessage(5001), "JSON file load failed")
     @Expect(LuaError.getErrorMessage(5002), "Memory allocation failed")
+    @Expect(LuaError.getErrorMessage(5003), "File load error (path, permission, or compile-time syntax issue)")
     @Expect(LuaError.getErrorMessage(5010), "Script internal error, check result for details")
+    @Expect(LuaError.getErrorMessage(5022), "No callable chunk found")
     @Expect(LuaError.getErrorMessage(9999), "Unknown error")
 }