check / check (push) Successful in 1m4s
A bare `docker build .` served the Dockerfile's check steps from the layer cache on an unchanged tree and exited 0 without running them. script/cibuild now computes the version on its own line and runs the same build command as script/docker and the shared policy, --no-cache included, so every CI build runs the checks. README.md describes script/cibuild accordingly. Model: opus-5-5