Strengthen tests — kill the highest-leverage survivors The other half of the local mutation-testing loop. reports which mutations escaped the tests; this skill picks the ones that matter and writes minimal assertion changes to kill them. When to use - User has just run and the verdict was - User says: "strengthen tests", "kill the survivors", "fix the red", "iterate on the tests for X" - Mid-loop: this skill's verify step calls again, so the loop closes here Don't use this skill: - Before any mutation testing has been run for the target file (no to triage) - For a verdict — there's nothing to…