What does cs-roadmap do?
Turns requirements "too big to fit into a single feature" into a complete up-front plan: architectural overview, interface contracts, and a breakdown checklist of sub-features, stored in .codestable/roadmap/{slug}/. Two modes: new / update. Triggered when a user says "I want an X system", "break down this requirement", "create a roadmap", or during feature-design when a requirement is found to be too large.