Guide the design-before-code phase for a new feature or architectural change. Gathers requirements via structured Q&A, researches prior art and alternatives, produces an ADR (Architecture Decision Record) with a feature implementation plan, then hands off to the project-card skill for epic/card creation. Use when starting a new feature, making an architectural decision, choosing between alternatives, or when asked to "plan this feature" or "write an ADR." Also use when asked to "read existing ADRs" or "revise a decision."
