Agent Skills: code-quality-audit

Run code quality audits covering test coverage, cyclomatic complexity, module sizes, dependency structure (cycles, fan-in/out), and mutation testing. Produces a prioritized report and acts as a quality gate. Use whenever the user wants to audit code quality, check coverage, find complex or oversized modules, detect dependency cycles, run mutation tests, assess technical debt, or gate a phase on quality thresholds. Triggers on "audit code quality", "check coverage", "run mutation testing", "find complex modules", "check for cycles", "/code-quality-audit", or automatically before marking an implementation phase complete.