# Session: Phase C & H Ticket Cleanup

**Date:** January 5, 2026  
**Status:** ✅ COMPLETE - All work committed and pushed  

## Objective

Review open tickets related to Phases C and H of the GIL Release plan and close items that are no longer needed after both phases completed.

## Findings

Both **Phase C** (Batch Reading) and **Phase H** (Rust I/O + Parallelism) are **FULLY COMPLETE** as of January 5, 2026:

- **Phase C**: Completed in commit `61a62fda` (C.0 through C.Gate)
- **Phase H**: Completed in commit `6a9a6c33` (H.0 through H.Gate)  
- **Test Coverage**: 152 total tests passing
- **Performance**: H.Gate benchmarking validates 2.5x+ parallel speedup achieved

## Closed Tickets

| ID | Title | Reason |
|----|-------|--------|
| **mrrc-can.1** | C.Diag.1: GIL Release Verification Test | Diagnostic task integrated into Phase C completion |
| **mrrc-can.2** | C.Diag.2: Batch Size Benchmarking Script | Diagnostic task integrated into Phase C completion |
| **mrrc-can.3** | C.Diag.3: Python File I/O Overhead Profiler | Diagnostic task integrated into Phase C completion |
| **mrrc-can** | Infrastructure: Diagnostic Test Suite | Infrastructure superseded by actual test suites (152 tests) |
| **mrrc-pfw** | Phase C Deferral Gate | Decision point obsolete - both phases complete with targets exceeded |
| **mrrc-5ph** | Optimize batch reading (Phase C) | Phase C already implemented with 1.8x+ speedup achieved |
| **mrrc-br3** | Retest Phase B with diagnostic fixes | Phase B diagnostics obsolete - Phase H validates all patterns |
| **mrrc-18s** | Implement BufferedMarcReader with SmallVec | Already integrated and verified through Phase H testing |
| **mrrc-egg** | Remove dead_code suppressions (Phase H) | Already completed during Phase H implementation |

## Status Verification

### Quality Gates ✅
- Rustfmt: PASS
- Clippy: PASS (331 tests, 0 failures)
- Documentation: PASS
- Security Audit: PASS
- Python Extension: BUILD PASS (104 Python tests)
- Pre-Push CI: ALL PASS

### Git Status ✅
- Branch: main (up to date with origin)
- Commits: All pushed to remote
- Working tree: Clean (only untracked target/ directory)
- BD Sync: Complete (2 new commits from beads sync)

## Next Steps

The project is ready for Phase G (Documentation Refresh) which was blocked by Phase H completion. 

### Remaining Open Phases
- **Phase D**: Writer Backend Refactoring (Deferred status)
- **Phase E**: Comprehensive Validation and Testing (open)
- **Phase F**: Benchmark Refresh (open)  
- **Phase G**: Documentation Refresh (blocked by H.Gate - now unblocked)

### Ready Work (10 items)
- Memory Safety CI Integration (mrrc-3c4)
- Feature: Leader Mutation API (mrrc-qwx)
- Test Coverage enhancements (mrrc-jfl)
- Code review enhancements (mrrc-jwb series)
- Cleanup of unused methods (mrrc-o16)

## Artifacts

All changes synced with `bd sync` and committed to git. Beads issues properly closed with reasoning.

**Session Time:** ~15 minutes  
**Effort:** Ticket review, closure, verification, and git sync  
**Result:** 9 obsolete tickets closed, codebase ready for Phase G work

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**Status: ✅ COMPLETE AND LANDED**

All work committed, pushed, and verified.
