- SKILL.md files: 28KB → 18KB (-35%) via references/
- New reference files: ce-brainstorm-mode.md, solution-search.md (×2), completion-report.md
- Expanded references: workflow-sequence.md, recommendation-logic.md
- Added thinkingStrategy support for per-skill thinking level control
- Extended settings loading: global ~/.pi/agent/settings.json as fallback
- Simplified README.md and README_CN.md
- Updated .gitignore to exclude docs/ except token-cost-evaluation.md
- 179 tests pass