facts.test.sh: greenfield fixtures for all-zeros and empty event.before,
the bare root establishing labeled=no, and the D2 pin (an unresolvable
MERGE_SHA exits 128 and never reports base_ver=(none) — the test that
|| true would fail). release-chain.test.sh: chain() gains optional
repo/stub args; a -dev root commit is a green NOTICE ceremony=no, a bare
unlabeled root still refuses. Plus changelog.d/134.md.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Closes#9. .github/workflows/release.yml (workflow_call) replaces box's,
rig's and cast's release.yml: the merge door (facts -> decide -> notes ->
tag+publish+bump, every decision in a tested lib script) and the tag door
(the manual fallback and backfill, no bump). Plus lib/facts.sh (the merge
door's impure half, contract-tested against fixture repos with a stubbed
gh), the self-ref pin guard (.github/scripts/self-ref-check.sh + CI step +
tests), the release-exercise scratch caller (dry wiring), the end-to-end
script-chain rehearsal, and the caller + artifact-hook contracts in
docs/CONSUMERS.md.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
