Mutate what I changed Closes the local dev loop. Single command to run Stryker against every source file the current branch touched (vs ), then point at any reds that need strengthening. When to use - User says , "mutate the files I changed", "check my changes", "did my tests stick" - Mid-feature: dev wants pre-merge feedback before pushing - Pre-PR: cheaper than waiting for the nightly cron Don't use: - For a single specific file ( is faster) - For non- changes — Stryker is only wired up there today - After the user already ran (which calls mutation-test internally for verification — running…