#1569 Phase 1 discovery (2026-05-02) found six historical credential
exposures in molecule-core git history. All confirmed dead — but the
reason they got committed in the first place was that the local
pre-commit hook had two gaps that the canonical CI gate (and the
runtime's hook) didn't:
1. **Pattern set was incomplete.** Local hook checked
`sk-ant-|sk-proj-|ghp_|gho_|AKIA|mol_pk_|cfut_` — missing
`ghs_*`, `ghu_*`, `ghr_*`, `github_pat_*`, `sk-svcacct-`,
`sk-cp-`, `xox[baprs]-`, `ASIA*`. The historical leaks were 5×
`ghs_*` (App installation tokens) + 1× `github_pat_*` — none of
which the local hook would have caught even if it ran.
2. **`*.md` and `docs/` were skip-listed.** The leaked tokens lived
in `tick-reflections-temp.md`, `qa-audit-2026-04-21.md`, and
`docs/incidents/INCIDENT_LOG.md` — exactly the file types the
skip-list excluded. The hook ran and silently passed.
This commit:
- Replaces the local hook's hard-coded inline regex with the canonical
13-pattern array (byte-aligned with `.github/workflows/secret-scan.yml`
and the workspace runtime's `pre-commit-checks.sh`).
- Removes the `\.md$|docs/` skip — keeps only binary, lockfile, and
hook-self exclusions.
- Adds the local hook to `lint_secret_pattern_drift.py` as an in-repo
consumer (read-from-disk, no network — the hook lives in the same
checkout the lint runs against). Drift now fails the lint when
canonical changes without the local hook updating in lockstep.
- Adds `.githooks/pre-commit` to the drift-lint workflow's path
filter so consumer-side edits also trigger the lint.
- Adopts the canonical's "don't echo the matched value" defense (the
prior version would have round-tripped a leaked credential into
scrollback / CI logs).
Verified: `python3 .github/scripts/lint_secret_pattern_drift.py`
reports both consumers aligned at 13 patterns. The hook's existing
six other gates (canvas 'use client', dark theme, SQL injection,
go-build, etc.) are untouched.
Companion change (already applied via API, no diff here):
`Scan diff for credential-shaped strings` is now in the required-checks
list on both `staging` and `main` branch protection — was previously a
soft gate (workflow ran, exited 1, but didn't block merge).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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