b3ac7746b9
Ensure planner writes GIT COMMIT entry before invoking git commit. Keep history entry even when git commit fails, matching summary text. Document invariant in code comment above write_git_commit call. Add lightweight test to assert history write precedes git::commit using test doubles instead of a real git repository. Investigate git history to find regression and its prior fix, and record a short root-cause summary outside the codebase. Reference completed_requirements_2025-12-10_16-55-05.md for details. Reference completed_todo_2025-12-10_16-55-05.md for task tracking.
58 lines
2.8 KiB
Markdown
58 lines
2.8 KiB
Markdown
## Planner History Handling - Ensure GIT COMMIT Entry Precedes Commit
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- [x] Investigation Phase
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- [x] Search git history for changes to `stage_and_commit()` function
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- [x] Identify commit that introduced the bug (history write AFTER commit)
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- [x] Identify commit that fixed the bug (history write BEFORE commit)
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- [x] Document findings in summary paragraph
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- [x] Verify Current Implementation
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- [x] Review current `stage_and_commit()` ordering in planner.rs
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- [x] Verify history::write_git_commit is called before git::commit
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- [x] Check if there are any other code paths that perform commits
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- [x] Add Guardrails
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- [x] Add explicit comment above write_git_commit explaining ordering requirement
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- [x] Create test to verify history write happens before commit
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- [x] Add test with mocked git failure to ensure history entry persists
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- [x] Testing
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- [x] Write unit test for commit ordering invariant
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- [x] Test with intentional git failure scenario
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- [x] Verify history entry appears even when commit fails
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- [x] Documentation
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- [x] Update planner.rs with inline comments
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- [x] Document the invariant in code comments
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- [x] Create final summary with git history findings
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## Investigation Summary
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Commit ff8b3e7c7b3bf89c140d24b6f59e443a4f9db0d8 (2025-12-09) initially implemented
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planning mode with the history write AFTER the git commit. Commit 633da0d8a685f462c4a74fb5f7b63e4de50596bf
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(also 2025-12-09, later the same day) corrected this by moving the history write BEFORE
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the commit, with the comment "Log commit to history BEFORE making the commit (provides
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audit trail even if commit fails)". The current HEAD maintains this correct ordering.
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## Root Cause Analysis
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The bug was introduced during the initial implementation of planning mode. The original code
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placed the history write after the git commit, which meant that if the commit failed (e.g.,
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due to git configuration errors, network issues, or missing staged files), no audit trail
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would exist in planner_history.txt. This was quickly identified and fixed the same day.
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The fix could potentially be undone during future refactoring if developers are not aware
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of the critical ordering requirement. This is why we have added:
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1. Comprehensive inline documentation explaining the invariant
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2. Historical context in comments referencing the original bug
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3. A comprehensive test suite that validates the ordering under various failure scenarios
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4. Clear warnings against moving the history write after the commit
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## Implementation Complete
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All tasks completed successfully:
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- Enhanced comments in planner.rs with CRITICAL INVARIANT documentation
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- Created comprehensive test suite (5 tests, all passing)
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- Tests cover: empty staging, successful commits, failed commits, multiple entries, format validation
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- Ordering invariant is now explicitly documented and tested |