vladopajic/go-test-coverage@v2 (v2.18.5+) restructured the composite
action to pass inputs via env-var mapping. Gitea act_runner does not
expand expressions in those blocks, so the literal string
'${{ inputs.config }}' reached the binary, breaking the coverage step.
Replace the action with a direct go install + binary invocation
(matching the Frostmoln pattern) and use --github-action-output to
expose total-coverage as a step output, dropping manual
'go tool cover -func' calculations.
Add go-test-coverage for coverage threshold enforcement. Coverage data
is uploaded as artifacts on main branch and compared against baseline
in PRs using shell script that gracefully handles first run without
baseline. PR comments show coverage percentage.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>