CI already skips the Android build for docs-only pull requests, and that part works — a README-only PR reports green in ~11s. The skip-list was just too narrow to catch a realistic docs PR.
PR #96 is the example: a contributing guide, docs corrections and issue templates. It ran the full lint + test + assemble four times, over exactly two files Gradle never reads — `.forgejo/ISSUE_TEMPLATE/config.yml` and `.gitignore`. Added to the list: issue templates, `.planning/`, `licenses/`, `renovate.json5`, `.gitignore`, `.gitattributes`, `.editorconfig`.
It stays a skip-list rather than a build-list, so an unfamiliar path still builds by default; the workflows themselves, `.gitmodules` and `scripts/` are deliberately not skippable. The step now also prints which files forced the build, so the next "why did my docs PR build?" is answerable from the log.
One latent bug alongside it: `github.base_ref` is normalised against a `refs/heads/` prefix. Arriving in full-ref form would fail the merge-base lookup and quietly degrade the guard into "always build" — the failure mode this PR is fixing, but permanently and invisibly.
Verified by replaying the new pattern over real history: PR #96 and #97 now skip; the forge migration (workflows), the search fix (app code) and a Weblate translation merge still build.
No issue — reported directly.
Co-authored-by: Jean-Luc Makiola <business@jeanlucmakiola.de>
Reviewed-on: https://codeberg.org/jlmakiola/calendula/pulls/98
3fca28810b