描述
Specification-driven feature development with auto-sized depth. Produces spec.md, design.md, and tasks.md artifacts with requirements traceability, plus verify and audit phases tied to acceptance criteria. Use when planning a feature, breaking a change into tasks or stories, implementing a named story or task, verifying implementation against acceptance criteria, auditing goals before closing, or turning a PRD into engineering artifacts. Triggers: "plan this feature", "spec this feature", "turn this PRD into a spec", "break this into tasks/stories", "create technical design", "implement story S-1", "implement task T-1", "verify implementation", "check acceptance criteria", "audit feature", "audit this spec", "validate goals", "UAT", "manual testing", "discuss this feature", "show feature status", "quick fix", "quick task", "quick mode", "small change", and known one-line fixes where the user names file and line. Not for diagnosing unknown bugs, authoring standalone PRD/RFC/ADR/TDD documents, PR/commit mechanics, or PM backlog tracking.