# Compact Status - 2025-11-18

**Focus**: v0.3.1 Quick Wins - Atomic Transactions, Input Validation, Code Review Fixes, PR Merge

**Key Accomplishments**:
1. **Implemented Issues #11 & #12**: Atomic multi-dependency transactions + input validation limits (100 deps/task, 100 chain depth)
2. **Code Quality**: Fixed 6 blocking issues from comprehensive code review, eliminated 120 lines of duplicate code
3. **Performance**: Optimized depth validation from O(N * (V+E)) to O(V+E) - 100x improvement for batch operations
4. **Merged PR #23**: All 221 tests passing, Issues #11 and #12 auto-closed

**Critical Decisions**:
1. **Synchronous Transactions**: Used `db.transaction()` (sync) for TOCTOU protection - maintains atomicity guarantees
2. **Batch Method Pattern**: Created `addDependencies()` batch method, refactored `addDependency()` to delegate - DRY principle + atomic semantics
3. **Hard Security Limits**: 100 dependencies per task + 100 chain depth - prevents DoS and stack overflow
4. **Result Pattern Cleanup**: Changed `getMaxDepth()` from `Result<number>` to `number` - eliminated dead code

**Next Priority Actions**:
1. **Issue #10**: Batch Dependency Resolution (HIGH priority, 7-10× performance improvement)
2. **Create v0.3.1 Release Notes**: Required before version bump per CLAUDE.md
3. **Issue #24 Phase 1**: Address high-impact tech debt (TypeScript casts, boundary tests, validation helper)

**Critical Issues**:
- **BLOCKER**: Missing `docs/releases/RELEASE_NOTES_v0.3.1.md` - required before v0.3.1 release
- **Tech Debt**: Issue #24 created with 23 pre-existing items from code review (~7 hours total effort)

**Key Files Modified**:
1. `src/implementations/dependency-repository.ts` - Atomic batch method, validation limits (+176 lines net)
2. `src/core/dependency-graph.ts` - Added `getMaxDepth()` algorithm (+66 lines)
3. `tests/unit/implementations/dependency-repository.test.ts` - 11 atomic operation tests (+355 lines)
4. `tests/unit/core/dependency-graph.test.ts` - 7 depth calculation tests (+137 lines)
5. `src/services/handlers/dependency-handler.ts` - Refactored to atomic batch (-84 lines)

**Context Notes**:
- Working directory is clean - all changes merged to main
- Dependency graph caching at repository level prevents N+1 queries
- Synchronous transactions are intentional for TOCTOU protection (don't refactor to async)
- CHANGELOG stays "Unreleased" until actual release (don't change to versioned header)

---
*Quick summary of [full status](./../2025-11-18_1935.md)*
