Staging health polling asked only whether something answered HTTP 200 at
the base URL. It could not tell the new deployment from the old one, so
journeys could pass against the previous release, and concurrent merges
could move the staging tags underneath a run in flight.
Each staging run now mints a build ID and stamps all three images with
the commit and that ID, as labels and — for frontend and backend — as a
build-time JSON file that environment overrides cannot rewrite.
/release.json reports both identities uncached, and scripts/ci/release.py
polls for the expected pair before and after the journeys. Only then are
the captured build digests tagged verified-<sha>.
Promotion resolves those verified tags to immutable digests, revalidates
their labels, and refuses a mixed or incomplete set before any :prod tag
moves. The whole staging workflow shares one concurrency group with
cancellation disabled, so releases serialise.
The scripts are stdlib-only and unit-tested against mocked registry and
HTTP behaviour; PR checks now run the pipeline and CI suites too. The
runbook records what this cannot prove locally, and that the first
rollout needs a commit built by this workflow.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The README still opened on "Primary School Compass", a KS2 tool for Wandsworth
and Merton served by FastAPI and vanilla JavaScript with Chart.js. Every layer
of that sentence is now wrong: coverage is England-wide across KS2, KS4,
all-through and post-16, Next.js owns the public UI, and school data comes from
dbt-built `marts.*` rather than CSVs loaded at startup. The setup instructions
walked a reader into a virtualenv and a CSV import that cannot build the current
schema, so following the docs produced an empty database and a wrong mental
model at the same time.
Replace the narrative docs with two reference documents that were checked
against the code: docs/ARCHITECTURE.md for request flow, data ownership, the
backend/frontend module boundaries and the real publication sequence, and
docs/DEVELOPMENT.md for the checks that actually run, including the container
and CI version skew that makes "just run pytest" misleading.
The env examples drifted the same way. ALLOWED_ORIGINS is a JSON array, not a
comma-separated list; the frontend needs FASTAPI_URL, DATABASE_URL and
PAYLOAD_SECRET, none of which were documented; and RATE_LIMIT_BURST,
DEFAULT_PAGE_SIZE and MAX_PAGE_SIZE were presented as tuning controls the routes
do not consult. Each is now stated as it behaves.
MIGRATION_SUMMARY.md keeps its content but gains a banner, because it reads like
setup instructions and is not.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016y2J6bs8gbuSJbH18w7Tan