Adds a lint that diffs the canonical SECRET_PATTERNS array in
.github/workflows/secret-scan.yml against every known public
consumer mirror, failing on any divergence.
Why: every side that scans for credentials carries its own copy of
the pattern list. They drift — most recently the workspace-runtime
pre-commit hook lagged the canonical by one pattern (sk-cp- /
MiniMax F1088 vector), so a developer's local pre-commit would let
a sk-cp- token through while the org-wide CI scan would refuse it.
Useless friction; automated detection closes the gap.
Implementation:
.github/scripts/lint_secret_pattern_drift.py — pure stdlib, fetches
each consumer's RAW file via urllib, extracts the
SECRET_PATTERNS=( ... ) array via anchored regex (the closing
`)` is anchored to the start of a line because pattern comments
like `# GitHub PAT (classic)` contain their own paren mid-line),
diffs against canonical, fails on missing or extra patterns.
Fetch failures are warnings, not errors — a consumer whose
branch was renamed shouldn't fail the lint until someone updates
the URL list.
.github/workflows/secret-pattern-drift.yml — daily 05:00 UTC cron
+ on-push gate (when canonical, the workflow, or the script
changes) + workflow_dispatch. Read-only token, 5-minute timeout.
Initial consumer set: workspace-runtime's bundled pre-commit hook
(the one that drifted on sk-cp-). molecule-controlplane's inlined
copy is private so this workflow can't read it; that's tracked
separately and the controlplane's own self-monitor is the gap.
Verified locally: lint detects drift correctly when the runtime
hook is missing sk-cp-, returns clean when aligned.
Refs: task #139.
6638d6e1d7