Baseline PNGs (492, 35 MB) leave git: they now live in the private R2 bucket
pcbjam-ci-screenshots as immutable sha256/<hex>.png objects, pinned by the
committed screenshot-manifest.json (v2: name, engine, sha256, bytes, dims).
tests/baseline-screenshots/ becomes a gitignored cache materialized by the new
`npm run screenshots:fetch` (r2-sync.ts + aws4fetch r2-store.ts).
- promote.ts: requires the RW keypair (shell env or gitignored tests/.env),
syncs the cache, uploads new hashes BEFORE rewriting the manifest; the
manifest diff is the only git-visible output. --prune only edits the
manifest — R2 objects are never deleted, old commits still resolve.
- compare.ts: skips the gate (exit 0, no report.json) when the manifest
expects baselines but the cache is empty (secretless callers).
- changelog.ts: diffs the manifest between revs and fetches bytes from R2;
guards against the migration commit (base manifest not v2 → skip).
- gen-manifest --check: v2 schema + resurrection guard (fails if baseline
PNGs are ever re-committed); credential-free so every caller can gate.
- wasm-build.yml: declares optional read-only S3 secrets, caches + fetches
baselines before the lint gate; release.yml/deploy-staging.yml pass them.
- screenshot-changelog.yml: triggers on the manifest path instead of PNGs.
All 492 objects are seeded and hash-verified in the bucket; fetch/compare
degrade to a warn-and-skip without credentials.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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