Agent Skills: blueprint-review

Review an existing Blueprint (the single product + technical design document) for gaps, inconsistencies, unresolved questions, correctness holes, and ambiguities that would force decisions during the build, then produce an updated version. Use when the user asks to "review the blueprint", "check the blueprint", or "update the blueprint". Reviews both halves and the user-stories section in one pass. Do NOT use to start a new Blueprint from scratch (use blueprint-create) or to make minor wording edits that don't need a structured review.