The canonical `.gitea/workflows/check.yml` lacked two settings `dnswatcher` had added, so a byte-identical re-vendor removed them. A `concurrency` block grouped by workflow and branch, with `cancel-in-progress: true`, makes a new push cancel the older run on the same branch and leaves every other branch's runs alone; on 2026-10-02 45 stale runs had queued on the one shared runner. `persist-credentials: false` on the checkout step keeps the job's token out of `.git/config`; `script/cibuild` needs no token. Each has a one-line comment, and the policy's workflow bullet and both checklists describe the file as it now is.
Unverified: the two live checks, which wait on the shared runner.
Model: opus-5-5
- All Dockerfiles must run make check as a build step
- Every repo needs a Gitea Actions workflow running docker build on push
- Greatly strengthen the hash-pinning rule: explicitly list all reference
types, ban curl|bash installs, mark as most important rule in document
- Add model .gitea/workflows/check.yml pinned by commit hash