name: SECRET_PATTERNS drift lint

# Detects when the canonical SECRET_PATTERNS array in
# .github/workflows/secret-scan.yml diverges from known consumer
# mirrors (workspace-runtime's bundled pre-commit hook today; more
# can be added as the consumer set grows).
#
# Why this exists: every side that scans for credentials has its own
# copy of the pattern list. They drift — most recently the runtime
# hook lagged the canonical by one pattern (sk-cp- / MiniMax F1088),
# so a developer's local pre-commit would let a sk-cp- token through
# while the org-wide CI scan would refuse it. The cost of that drift
# is dev confusion + delayed feedback; the fix is automated detection.
#
# Triggers:
#   - schedule: daily 05:00 UTC. Catches drift introduced by edits
#     to a consumer copy that didn't update canonical here.
#   - push to main/staging where the canonical or this lint changed:
#     catches the inverse — canonical updated but consumers not yet
#     bumped. The lint will fail the push; that's intentional, the
#     person editing canonical is the right person to also update
#     the consumer.
#   - workflow_dispatch: ad-hoc operator runs.

on:
  schedule:
    # 05:00 UTC = 22:00 PT / 01:00 ET. Quiet hours so a failure
    # email lands when humans are starting their day, not
    # interrupting it.
    - cron: "0 5 * * *"
  push:
    branches: [main, staging]
    paths:
      - ".github/workflows/secret-scan.yml"
      - ".github/workflows/secret-pattern-drift.yml"
      - ".github/scripts/lint_secret_pattern_drift.py"
      - ".githooks/pre-commit"
  workflow_dispatch:

# GITHUB_TOKEN scoped to read-only. The lint only does git checkout
# + HTTPS GETs to public consumer files; no writes to anything.
permissions:
  contents: read

jobs:
  lint:
    name: Detect SECRET_PATTERNS drift
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          python-version: "3.11"

      - name: Run drift lint
        run: python3 .github/scripts/lint_secret_pattern_drift.py