What problem does it solve? Repeatedly re-reading the same business module's source code wastes effort during design, refactoring, debugging, and onboarding. This Skill deeply analyzes a single business module once and persists the result as a reusable "module expert" asset package, so future work can consult the documentation instead of re-tracing code. ## Core Features & Use Cases - Two-layer documentation: Produces a black-box contract layer (capability contracts, usage flows, real code examples, data flow, key decisions) plus a white-box implementation layer (architecture, implementation, data flow, models, API, tests, ops) under .module-experts/. - Scalable organization: Supports sub-experts for large modules, topics for very large modules (topic → expert → sub-expert), and batched creation for modules too big to process at once. - Quality pipeline: Runs plan preview with user confirmation, parallel sub-agent research, format self-checks (R1–R7 / CR1–CR10), auto-review, index updates, and knowledge-base memory writes. - Use Case: Before refactoring a payment module, ask the AI to deeply analyze it; the Skill produces a payment expert package with API contracts, runnable usage examples, architecture maps, and test status that any future session can reuse. ## Quick Start Ask the AI to deeply analyze the payment module and build a module expert package for it.