## 1. Implementation
- [x] 1.1 Add `llm-json-extractor` pure utility and unit tests.
- [x] 1.2 Migrate component-side AI JSON parsing entrances.
- [x] 1.3 Migrate service/tool-side AI JSON parsing entrances while preserving business fallbacks.
- [x] 1.4 Update focused regression tests.
- [x] 1.5 Run OpenSpec validation, targeted Vitest, and drawnix typecheck.