# Bug Report: Pre-existing Fixes

## Bugs Found: 0

All fixes verified:
1. `_infer_state_from_artifacts`: `spec_only → research` confirmed by test
2. `_infer_state_from_artifacts`: `implementation_only → bug_find` confirmed by test
3. `cmd_validate_folder`: empty `.state` → error, confirmed by test
4. `cmd_validate_folder`: whitespace `.state` → error, confirmed by test
5. `upgrade.sh`: `|| true` removed, python3 check added, git-dir detection fixed
6. All 206 tests pass