Design production modules, interfaces, seams, types, signatures, and dependency structure before implementation. Use ONLY when the requested result is a production code shape or integration contract, such as /architect, 'architect this', 'design this module', 'improve this interface', or 'deepen this module'; do not use for throwaway HTML experiments that test state, transition, policy, scheduling, or algorithm behavior.
Review local changes, branch diffs, commits, or pull requests for correctness, security, regressions, maintainability, repository standards, specification compliance, and blast radius. Use for "review", "code review", "review my changes", "review PR", "review since X", "thermo", "thermonuclear", "deep review", "interrogate", "adversarial review", "multi-model review", "challenge this", "stress test this code", "find blind spots", "tear this apart", "blast radius", "what could this break", "review canvas", "visual PR review", "PR walkthrough", or "review and ship". Accepts an optional fixed point, PR number, or PR URL.
Review, execute, reconcile, or publish an existing codebase audit plan. Use when the user points to an existing plan, plans directory, or audit backlog and explicitly asks to review the plan, implement it, check it against current code, reconcile its status or drift, or publish it as an issue. Source changes happen only in an isolated Git worktree. Never merge or push without explicit authorization, and never change the user's main worktree. Do not use this skill to discover improvements or create a new audit; use improve-codebase-architecture for that.
