JavaScript Core Knowledge Deep Knowledge : Use with technology: for comprehensive documentation. ES6+ Features Modules (ESM vs CommonJS) Module Interop Issues Async Patterns Array Methods Object Methods Classes Error Handling --- When NOT to Use This Skill | Scenario | Use Instead | |----------|-------------| | TypeScript project | skill | | Node.js runtime internals | skill | | Frontend frameworks | , , etc. | | Build tooling | , , etc. skills | | Testing | , skills | --- Anti-Patterns | Anti-Pattern | Why It's Bad | Correct Approach | |--------------|--------------|------------------| | Usi…