What problem does it solve? Architecture documentation drifts out of sync with code, invents nonexistent components, or contradicts design documents. This Skill maintains a current-state system map in codestable/architecture/ through three disciplined modes: backfill, update, and check. ## Core Features & Use Cases - Backfill: Write a new architecture doc for a module that exists in code but was never documented, with every structural claim anchored to file:line evidence. - Update: Refresh an existing doc based on recent code changes, updating last_reviewed and the ARCHITECTURE.md index. - Check: Run consistency audits across three sub-targets (design-internal, design-vs-code, architecture-folder-internal) and produce a severity-graded report without modifying anything. - Use Case: After merging a feature, ask for an architecture check to verify the design doc matches the implemented code, receiving a report listing each inconsistency with location, impact, and suggested fix. ## Quick Start Ask the assistant to check whether the current feature design document matches the actual code implementation.