fix(release): emit cosign certificate file alongside signature#10
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The v26.08 release published .sig files but no .pem files, which made
the cosign verify-blob command in README.md unusable — keyless
verification needs the Fulcio-issued certificate that ties the
signature back to the OIDC issuer.
Goreleaser only expands ${signature} and ${certificate} in the args
list when the signs: block has matching `signature:` and
`certificate:` keys declared. Without `certificate:`, the substitution
resolved to empty string and cosign silently wrote to "".
Adding both keys produces ${artifact}.sig + ${artifact}.pem for every
artefact at release time. A re-tag of v26.08 would regenerate the
release with both files.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
The v26.08 release uploaded `.sig` files but no `.pem` files, which makes the `cosign verify-blob` snippet in README.md unusable — keyless verification needs the Fulcio-issued certificate that ties the signature back to the OIDC issuer.
Goreleaser only expands `${signature}` and `${certificate}` in the `args:` list when the `signs:` block has matching `signature:` and `certificate:` keys declared. Without `certificate:`, the substitution resolved to empty string and cosign silently wrote to `""`.
Adding both keys produces `${artifact}.sig` + `${artifact}.pem` for every artefact. A re-tag of v26.08 would regenerate the release with both files.
🤖 Generated with Claude Code