ci: cancel stale runs on same-branch pushes#20
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Adds a branch-scoped concurrency group so rapid pushes to the same ref cancel previous in-flight runs. Does not affect other branches — main/master runs never get cancelled by feature-branch pushes. Pure cargo build/test workflow with no shared external state, so cancellation is safe.
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Summary
Adds a branch-scoped
concurrencyblock to.github/workflows/ci.ymlso rapid pushes to the same ref cancel in-flight runs. Only same-branch reruns are cancelled — pushes to other branches never affect each other.Why
From the cross-repo CI audit (rome-ops#45): no concurrency cancellation means rapid pushes pile up runs. This is a pure cargo build/test workflow with no shared external state, so cancellation is safe.
Test plan
Related: rome-ops#45.
🤖 This response was generated by Claude Code.