What problem does it solve? Design documents often ship with structural gaps, vague decisions, and cross-document inconsistencies that surface only during implementation. This Skill performs a structured review of an existing design document and outputs a severity-graded issue list (blocking / suspected blocking / warning / suggestion) with concrete fix suggestions, so defects are caught before coding begins. ## Core Features & Use Cases - Five-dimension review: Checks structural completeness, content quality, technical correctness, cross-document consistency, and user experience (both positive and negative paths) across single files or multi-document design sets. - Format-aware baselines: Recognizes design-craft formatted documents (parent/child doc conventions) for precise baseline checks, and falls back to general review rules for free-form documents. - Confidence-graded technical challenges: Each technical challenge carries a confidence level; medium-confidence items are downgraded to "suspected blocking" requiring human confirmation rather than counted as hard blockers. - Incremental re-review: Given a revised document plus the previous review report, verifies fixes, scans only changed sections, and inherits previously passed items. - Use Case: After drafting a multi-document technical design with design-craft, ask for a review to receive a report listing blocking issues like missing interface return types, inconsistent API signatures between parent and child docs, and unsubstantiated "already supported" claims. ## Quick Start Review the design document at docs/user-management_DESIGN.md and give me a severity-graded issue list with fix suggestions.