Stop hook: scope auto-capture commit to memory/+tasks/ only (data-loss fix)

[netdust]

The bug (data loss, all sessions)

The session-end memory Stop hook (session-stop.py → git_commit_memory) committed the whole staged index. The git add was correctly scoped to memory/ tasks/, but the git diff --cached guard and the git commit had no pathspec — so any change staged elsewhere during a session (a mid-build git rm of source, a half-staged edit) was swept into a memory(...): auto-capture session end commit and lost from where it belonged.

Observed in the wild: 308 lines of source PHP templates deleted from HEAD under a memory label, with no memory content — the deletion had been staged mid-session, memory/tasks were unchanged, but the unscoped guard still fired and the unscoped commit captured the deletion. The templates were absent from HEAD afterward, forcing a rewrite of the completion modal to recover.

The fix

git_commit_memory now path-scopes every git verb to memory/+tasks/ (only the dirs that exist, so a non-matching pathspec can't abort the commit):

• the guard (git diff --cached --quiet -- <paths>) fires only on our changes;
• the commit (git commit … -- <paths>) is structurally incapable of touching anything else — other staged changes stay staged, untouched.

Regression test

tests/test_stop_hook_commit_scope.py pins both halves, with an unrelated deletion pre-staged before the hook fires:

• A. No memory content → the hook creates no commit and the staged deletion never enters HEAD.
• B. Real memory content → the commit contains only memory/, the staged deletion is not swept in, and it stays pending.

Verified red on the old hook (Case B's commit contains src/template.php, source drops from HEAD) and green on the fix. The full stop-hook family stays green (test_no_auto_memory, test_stop_hook_dedup, test_stop_hook_idempotency, plus the new module). The one unrelated suite failure (test_integration_contract) is a pre-existing environmental skip, untouched by this change.

🤖 Generated with Claude Code

---

Generated by Claude Code

[chatgpt-codex-connector]

You have reached your Codex usage limits for code reviews. You can see your limits in the Codex usage dashboard.