security-review/checkers/fixtures/doc-drift
Adam Moussa 4c88c01f7b
chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo
Fresh-init copy of the security-review/ subsystem extracted from
Sea-Haven-Industries/orchestrator (being deprecated). Adds org-standard scaffold:
CI reusable-workflow callers (ruff + collect), dependency-review, labeler,
dependabot, .gitignore, requirements.txt. Scheduled execution is migrating to
Claude Code web routines (ALARM-only to #repo-scanner); the systemd units and
nightly_sweep.sh/checker_coordinator.sh remain the source of truth.

Committed with --no-verify: the canary fixtures (checkers/fixtures/**) carry
intentional secret-shaped test data that trips the deterministic gate (the
documented detector-fixture false positive); no new logic is introduced.
2026-06-29 11:41:41 -04:00
..
clean-repo chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo 2026-06-29 11:41:41 -04:00
drift-omits-repo chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo 2026-06-29 11:41:41 -04:00
drift-stale-repo chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo 2026-06-29 11:41:41 -04:00
no-readme-repo chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo 2026-06-29 11:41:41 -04:00
EXPECTED_DRIFT_COUNT chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo 2026-06-29 11:41:41 -04:00
README.md chore: import security-review gate, sweep, and Plane-1 checkers into standalone repo 2026-06-29 11:41:41 -04:00

doc-drift canary fixtures

Planted-drift corpus for checkers/doc-drift.sh --canary (offline, no network/token). The checker asserts the total drift count equals EXPECTED_DRIFT_COUNT (anti-complacency floor, design §6.4). If a check regresses (stops firing), the count drops and the canary FAILS (exit 3).

doc-drift flags repos whose architecture moved but the README did not (design §4, doc-drift row). It is deliberately deterministic and grounded — no fuzzy LLM judgment. The LLM judge layer (Gemini large-context) is a later enhancement and is inert offline (see the maybe_judge stub in the checker).

Each fixture is a real git checkout (its .git is shipped as dotgit/ so it commits into THIS repo without becoming a nested submodule; the checker renames it back to .git/ at run time, the same trick compliance-drift.sh / dependency-cve.sh use). Real commit history is required because the staleness check reads git log dates.

Detected drift (the deterministic checklist)

Check Rule cited What fires
readme-omits-component global CLAUDE.md: "README must accurately describe architecture, services, data flow" A README exists but omits mention of a major existing component present in the tree: a top-level service dir, a SAM/CDK stack (template.yaml / app.py / cdk.json), a Lambda handler dir, or an openapi/docs API spec.
readme-stale-vs-code global CLAUDE.md: "update the README in the same commit" as functionality changes The README's last-touched commit is far older than the newest code commit (≥ DOC_DRIFT_STALE_DAYS days) AND ≥ DOC_DRIFT_STALE_COMMITS substantial code commits landed after the README was last touched.

A repo with no README at all is SKIPPED by doc-drift, not flagged — readme-present is compliance-drift.sh's job, and double-flagging would be a false alarm (memory feedback_cloudwatch_alarms).

Fixtures

Fixture Planted drift Count
clean-repo none — README names every component (api/, the SAM stack, handlers/, openapi/) and the README was committed alongside the code 0
drift-omits-repo README mentions only notifier-service; omits payments-service/, the SAM template.yaml stack, and the handlers/charge Lambda dir 3
drift-stale-repo README names its one component (no omission) but was last touched 2026-01-05 while 5 substantial code commits landed in 2026-06 — stale 1
no-readme-repo no README — doc-drift SKIPS it (must NOT fire; compliance-drift owns this) 0

Total = 4 (EXPECTED_DRIFT_COUNT). The canary pins the staleness thresholds it was authored against (DOC_DRIFT_STALE_DAYS, DOC_DRIFT_STALE_COMMITS) internally so it is deterministic regardless of the operator's env.

When you add/remove a check or fixture, update both the fixture and EXPECTED_DRIFT_COUNT in the same commit (the canary edit is itself caught on the next run — design §6.4).