commit_memory now routes diagnostics to stderr and prints ONLY the memory-commit
short hash to stdout, so the capitalize-commit include can report it. Proven:
- T6: commit→hash (matches independent rev-parse), no-op→empty, unsafe→empty+exit3.
- T7: double run creates exactly one commit (real run, not by construction).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W9sqAwZxBMZSynZoVrEJhd
