A living product specification skill. Use when you want to document how a system works, capture user stories and flows, build shared vocabulary, discuss existing functionality, or create a single source of truth for a feature or product area.
Use when reviewing an existing blueprint for gaps, missing flows, terminology conflicts, coverage of error cases, or untestable requirements.
Use when a system already exists but is not documented — to capture how it actually works, build shared vocabulary around it, and produce a living spec that the team can reason about and discuss.
Use when building a blueprint from scratch through conversation — specifying a new feature, capturing a planned system, or turning stakeholder descriptions into a structured living spec.
Use when evaluating a proposed change to a system described in a blueprint — a new feature, behaviour change, rule modification, or scope expansion. Convenes the review panel.
Use when reviewing a draft or existing blueprint for quality — missing scenarios, terminology gaps, unclear requirements. Convenes the review panel for a structured debate.
Use when creating a new blueprint — generates the full directory structure with placeholder files and inline hints for each section.
Use when a system has changed and its blueprint needs to reflect the change — new behaviour, modified flows, revised rules, or resolved questions.