Use when the user says "validate on the sidecar", "run tests on the sidecar", "sync to sidecar", "sidecar dev loop", "check this on the sidecar", "validate remotely", "scaffold test-suites.yml", "set up smarter testing", "write .circleci/test-suites.yml", "run smarter testing doctor", or "diagnose smarter testing", or when you have made edits and want to verify them on a remote `chunk` sidecar instead of running locally. Also covers creating sidecars, snapshotting a configured environment, customizing the sidecar image via `chunk sidecar`, and scaffolding `.circleci/test-suites.yml` for CircleCI Smarter Testing.
Use when asked to "review recent changes", "chunk review", "review my diff", "review this PR", "review PR
Debug CircleCI build failures, analyze test results, and identify flaky tests. Use when the user says "debug CI", "why is CI failing", "fix CI failures", "find flaky tests", "what broke in CI", "check CircleCI", or asks about failing pipelines or build errors.
Use when asked to "find testing gaps", "chunk testing-gaps", "mutation test", "mutate this code", "test mutation coverage", or "find surviving mutants". Runs a 4-stage mutation testing process: discovery, validation via git worktrees and CI, production cross-reference, and risk assessment.