build: Include default-plugins in distribution

- Add copy-plugins script to copy default-plugins to dist/ during build
- Update plugin-loader to check both dev and prod paths for default-plugins
- Ensure default-plugins are bundled with transpiled JS in dist/
- Verified with npm pack --dry-run that plugins are included
- Both dev mode (node src/index.ts) and built mode (node dist/index.js) work correctly

Co-authored-by: vobu <6573426+vobu@users.noreply.github.com>

Author: Copilot

package.json

@@ -19,8 +19,9 @@
     "LICENSE"
   ],
   "scripts": {
-    "build": "npm run clean && tsc",
+    "build": "npm run clean && tsc && npm run copy-plugins",
     "clean": "node -e \"require('fs').rmSync('dist',{recursive:true,force:true})\"",
+    "copy-plugins": "node -e \"const fs=require('fs');const path=require('path');const src='default-plugins';const dest='dist/default-plugins';if(fs.existsSync(src)){fs.cpSync(src,dest,{recursive:true})}\"",
     "prepublishOnly": "npm run build",
     "test": "node --test tests/unit/setup.test.ts tests/unit/*.test.ts tests/integration/*.test.ts",
     "test:unit": "node --test tests/unit/setup.test.ts tests/unit/*.test.ts",

src/plugin-loader.ts

@@ -42,9 +42,24 @@ async function loadDefaultPlugins(): Promise<void> {
     // Get the directory where this file is located
     const __filename = fileURLToPath(import.meta.url);
     const __dirname = dirname(__filename);
-    const defaultPluginsDir = join(__dirname, '..', 'default-plugins');
 
-    if (!existsSync(defaultPluginsDir)) {
+    // Check both possible locations:
+    // In development: src/plugin-loader.ts -> ../default-plugins
+    // In production: dist/plugin-loader.js -> dist/default-plugins
+    const possiblePaths = [
+      join(__dirname, 'default-plugins'),  // Production path
+      join(__dirname, '..', 'default-plugins'),  // Development path
+    ];
+    
+    let defaultPluginsDir: string | null = null;
+    for (const path of possiblePaths) {
+      if (existsSync(path)) {
+        defaultPluginsDir = path;
+        break;
+      }
+    }
+    
+    if (!defaultPluginsDir) {
       logger.debug('No default-plugins directory found');
       return;
     }