hooks: git-commit-confirm becomes silent-unless-suspiciousHEADmain

The hook used to emit a confirmation modal on every git commit. That
produced too many benign interruptions — the modal fired even on clean,
well-formed, attribution-free commits. Now it only emits a modal when
one of these safety checks fires:

- AI-attribution patterns in the commit message (Co-Authored-By: Claude,
  robot emoji, Generated-with-AI footers, etc.) — the primary leak
- Message not parseable from command line (editor would open, which
  silently blocks Claude)
- No files staged (the commit would fail anyway)
- Git author unusable (user.name / user.email not configured)

Clean commits pass through silent. The AI-attribution scan is unchanged;
the always-on review is gone.

README updated to describe the new behavior.

1 files changed, 1 insertions, 1 deletions

diff --git a/hooks/README.md b/hooks/README.md
index 5555514..09abe09 100644
--- a/hooks/README.md
+++ b/hooks/README.md
@@ -7,7 +7,7 @@ Machine-wide Claude Code hooks that install into `~/.claude/hooks/` and apply to
 | Hook | Trigger | Purpose |
 |---|---|---|
 | `precompact-priorities.sh` | `PreCompact` | Injects a priority-preservation block into Claude's compaction prompt so the generated summary retains information most expensive to reconstruct (unanswered questions, root causes with `file:line`, subagent findings, exact numbers/IDs, A-vs-B decisions, open TODOs, classified-data handling). |
-| `git-commit-confirm.py` | `PreToolUse(Bash)` | Gates `git commit` behind a confirmation modal showing the parsed message, staged files, diff stats, and git author. Parses both HEREDOC and `-m`/`--message` forms. |
+| `git-commit-confirm.py` | `PreToolUse(Bash)` | Silent-unless-suspicious gate on `git commit`. Only prompts when the message contains AI-attribution patterns, the message can't be parsed (editor would open), no files are staged, or the git author is unusable. Clean commits pass through without a modal. Parses both HEREDOC and `-m`/`--message` forms. |
 | `gh-pr-create-confirm.py` | `PreToolUse(Bash)` | Gates `gh pr create` behind a confirmation modal showing title, base←head, reviewers, labels, assignees, milestone, draft flag, and body (HEREDOC or quoted). |
 | `destructive-bash-confirm.py` | `PreToolUse(Bash)` | Gates destructive commands (`git push --force`, `git reset --hard`, `git clean -f`, `git branch -D`, `rm -rf`) with a modal showing the command, local context (branch, uncommitted file counts, targeted paths), and a warning banner. Elevates severity when force-pushing protected branches or targeting root/home/wildcard paths. |