fix(installer): ensure hooks/lib is copied with correct permissions (fixes #2185)

src/__tests__/installer.test.ts

@@ -621,4 +621,36 @@ describe('Installer Constants', () => {
       }
     });
   });
+
+  describe('Hook Scripts Installation (#2185 regression)', () => {
+    it('should have all required lib files in templates/hooks/lib', () => {
+      const templatesLibDir = join(getPackageDir(), 'templates', 'hooks', 'lib');
+      expect(existsSync(templatesLibDir)).toBe(true);
+
+      const libFiles = readdirSync(templatesLibDir);
+
+      // Required lib files that must be present
+      const requiredFiles = ['stdin.mjs', 'atomic-write.mjs', 'config-dir.mjs'];
+      for (const file of requiredFiles) {
+        expect(libFiles).toContain(file);
+      }
+    });
+
+    it('should have all standalone hook template files present', () => {
+      const templatesDir = join(getPackageDir(), 'templates', 'hooks');
+      const hookFiles = [
+        'keyword-detector.mjs',
+        'session-start.mjs',
+        'pre-tool-use.mjs',
+        'post-tool-use.mjs',
+        'post-tool-use-failure.mjs',
+        'persistent-mode.mjs',
+        'code-simplifier.mjs',
+      ];
+
+      for (const file of hookFiles) {
+        expect(existsSync(join(templatesDir, file))).toBe(true);
+      }
+    });
+  });
 });

src/installer/index.ts

@@ -412,18 +412,6 @@ function ensureStandaloneHookScripts(log: (msg: string) => void): void {
     mkdirSync(hooksLibDir, { recursive: true });
   }
 
-  // Copy shared lib modules (stdin.mjs, atomic-write.mjs) required by hook scripts
-  const libSourceDir = join(templatesDir, 'lib');
-  const libTargetDir = join(HOOKS_DIR, 'lib');
-  if (existsSync(libSourceDir)) {
-    if (!existsSync(libTargetDir)) {
-      mkdirSync(libTargetDir, { recursive: true });
-    }
-    for (const libFile of readdirSync(libSourceDir)) {
-      copyFileSync(join(libSourceDir, libFile), join(libTargetDir, libFile));
-    }
-  }
-
   for (const filename of STANDALONE_HOOK_TEMPLATE_FILES) {
     const sourcePath = join(templatesDir, filename);
     const targetPath = join(HOOKS_DIR, filename);