Layer C of the plan written after the 2026-09-21 wipe (BDR-095): a reviewer
sub-agent traced `lftp mirror --delete` against a local file:// tree, the
prose tiers named neither lftp nor a local trace, the brief had authorized
it, and four days of commits had never left the machine.
- gitflow: `start` pushes the branch with its upstream, merge targets are
pushed after each merge, and `init`/`install-hook` write post-commit and
post-merge hooks that push every commit as it lands (warn, never block;
GITFLOW_NO_PUSH=1 for throwaway repos). T18 + T19 (installed == emitted).
- hooks/unpushed-guard.sh on SessionStart and Stop: branch ahead of its
upstream, no upstream, or no origin. Non-blocking systemMessage.
- settings.json: static deny for transfer and mirror tools, rsync --delete,
xargs rm, pipe-to-shell, chmod/chown -R, sudo/doas/pkexec, disk tools,
chattr, docker volume drops/prune/--privileged/socket/-v /:, git history
destruction, --no-verify and core.hooksPath; new hard_deny "destructive
tool against a local path, brief carries no user authority"; soft_deny
reworded + discarding uncommitted work; environment records the incident.
- CLAUDE.global.md "Destructive tools & data loss"; the four report-only
agents trace by reading, never by running, whatever the brief says.
- lib/tests/guard-bash.test.sh: executable spec of the PreToolUse guard
(214 cases). The hook itself is not shipped (BLK-022); the spec skips.
Root cause: job7/17bdd08 added the gitleaks scan to the hook GENERATOR
(_gitflow_emit_pre_commit) but the installed .githooks/pre-commit is only
(re)written by 'gitflow init'/'install-hook' — never invoked on this repo after
job7. No mechanism propagates a generator change to already-installed hooks, and
T10 diffs only the allow/block verdict (not content), so the drift was silent.
The installed hook (620071b, 2026-06-29) predated the gitleaks addition by 8 days.
Regenerated via 'gitflow.sh install-hook'; installed hook now == fresh emit.
Gates: grep -c gitleaks=7; negative test (staged AKIA... on a working branch)
BLOCKED with exit 1; make test GREEN. Review finding A2 (P0). A content-drift
assertion is added to make test in the fil-rouge commit.
bastien