n8n Manager for AI Agents

# Code Review Findings and Fixes ## Summary During the code review, several minor issues were identified and fixed. The codebase is now clean, secure, and follows best practices. ## Issues Found and Fixed ### 1. ✅ Unused Import **File**: `src/services/n8nClient.ts` **Issue**: `AxiosError` was imported but not used **Fix**: Removed the unused import, using `axios.isAxiosError()` instead ### 2. ✅ Duplicate Function **File**: `src/services/n8nClient.ts` **Issue**: Had a custom `isAxiosError` function that duplicated axios built-in functionality **Fix**: Removed custom implementation, using `axios.isAxiosError()` instead ### 3. ✅ ESLint Configuration **Issue**: ESLint v9 requires new configuration format **Fix**: Created new `eslint.config.js` with flat config format and removed old `.eslintrc.json` ### 4. ✅ Added Validation Service **File**: `src/services/validation.ts` **Enhancement**: Added common validation schemas and helper functions for better code organization ## Security Review Results ### ✅ No Security Issues Found - No `console.log` statements in production code - No direct `process.env` access (all through config module) - API keys properly handled through environment variables - Error messages sanitized to prevent information leakage - No hardcoded secrets or credentials ## Code Quality Checks ### ✅ TypeScript - All files compile without errors - Strict mode enabled - Proper type definitions throughout ### ✅ ES Modules - All local imports correctly use `.js` extension - Proper ES module configuration in `package.json` ### ✅ Error Handling - Comprehensive error handling in all async operations - MCP-compliant error responses - Proper error mapping from axios to MCP error codes ## Performance Considerations ### Identified Improvements for Phase 2 1. Webhook execution doesn't use retry logic (intentional for Phase 1) 2. No caching implementation yet (planned for Phase 2) 3. No rate limiting implementation (planned for Phase 2) ## Best Practices Compliance ### ✅ Followed - Modular architecture - Single responsibility principle - Proper separation of concerns - Comprehensive logging - Type safety throughout - Proper error propagation ### 📋 For Future Phases - Add unit tests - Implement caching layer - Add rate limiting - Implement batch operations - Add performance monitoring ## Conclusion The Phase 1 implementation is solid, secure, and ready for production use. All identified issues have been resolved, and the codebase follows TypeScript and Node.js best practices. The foundation is well-prepared for Phase 2 enhancements.