Remove 5 obsolete documentation files (2,847 lines, 20% reduction):
Removed files:
- HASH_ID_DESIGN.md: Design doc for hash IDs (implemented in v0.20+, bd-166)
- contributor-workflow-analysis.md: Design analysis (superseded by MULTI_REPO_*.md)
- vc-feedback-on-multi-repo.md: Feedback on design (now implemented)
- import-bug-analysis-bd-3xq.md: Bug analysis for specific issue (likely fixed)
- TEST_OPTIMIZATION.md: One-time optimization doc (completed Nov 2025)
All removed files were historical design/analysis documents for features
that are now implemented and documented elsewhere.
Retained files:
- MULTI_REPO_HYDRATION.md: Referenced as internals documentation
- ROUTING.md: Active user-facing feature documentation
- EXCLUSIVE_LOCK.md: Integration documentation for external tools
- ADAPTIVE_IDS.md: Referenced by CONFIG.md
- COLLISION_MATH.md: Referenced by ADAPTIVE_IDS.md and CONFIG.md
Total documentation reduced from 14,043 to 11,196 lines.
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