Release confidence
Bind promotion to source, migrations, evidence, preview behavior, and read-only checks.
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Canonical source
This public guide is distilled from docs/RELEASE-CERTIFICATION.md and docs/DEPLOY-RAILWAY.md. Keep implementation detail in those repository documents.
Evidence belongs to an artifact
Release certification binds source, build output, resource and evolution evidence, reviewed migration digests, environment contracts, and a passing preview report. Drift invalidates eligibility instead of preserving a stale green badge.
Promotion is not deployment
Attestation does not apply migrations or deploy code. Production verification is explicitly read-only, rejects credentials in URLs, probes tenant denial and operational health safely, and never relabels reachability as end-to-end convergence.
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