Agent Skills: codebase-audit

Long-running comprehensive adversarial audit of an entire codebase. Orchestrates partition-by-partition adversarial reviews by delegating to /adversarial-reviewer --codebase <partition>, then synthesizes a cross-partition risk register and a written remediation report. Unlike /adversarial-reviewer --codebase (which samples strategically from the whole repo in one pass), this skill methodically covers the full scope over a long session, is resumable after crashes, and produces a consulting-style deliverable. Use for onboarding audits of inherited codebases, pre-acquisition code due diligence, periodic tech-debt health checks, or when the user asks for a "comprehensive / thorough / exhaustive / deep / no-stone-unturned review of the codebase". Triggers on "/codebase-audit", "comprehensive codebase review", "full codebase audit", "thorough audit", "code due diligence", "tech debt audit", "what am I inheriting (comprehensive)". Different from /adversarial-reviewer --codebase (strategic sample, single pass) and /code-quality-audit (metrics-based: coverage/complexity/cycles/mutation).