/mutate

Use mutation testing to measure test strength on a narrow, already-stabilized scope.

This skill is for adapter selection, scoped execution, and survivor triage. It complements crap:

• crap ranks risk from complexity plus coverage.
• mutate finds assertions and scenarios your tests still miss.
• Mutation testing does not directly raise or lower CRAP. CRAP moves only when code complexity or coverage changes.

Modes

• Analysis mode: choose adapter, scope, and run plan without executing.
• Execution mode: run a scoped mutation pass, triage survivors, improve tests, and rerun.