PowerShell 5.1 `Out-File -Encoding utf8` prepends a UTF-8 BOM. The
act_runner GITHUB_OUTPUT parser then read the key as "artifact-path",
so steps.invoke-ci.outputs.artifact-path resolved empty. Combined with
the trailing backslash, the upload path became "\" -> the F: drive root,
causing upload-artifact to ingest the entire drive (hundreds of GB of
unrelated files).
- Append outputs with UTF8Encoding($false) (no BOM).
- Throw if artifactPath is empty instead of emitting nothing.
- Drop the trailing backslash; use /*.log for the diagnostic glob.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Gitea act_runner reports as GHES; @actions/artifact v2 (upload/
download-artifact@v4) uses the Twirp API Gitea does not implement,
failing with GHESNotSupportedError. v3 uses the artifact protocol
Gitea supports.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Simone