What problem does it solve? Codebases accumulate shallow modules whose interfaces are nearly as complex as their implementations, making them hard to test and navigate. This Skill surfaces that architectural friction and proposes concrete deepening refactors grounded in a shared design vocabulary. ## Core Features & Use Cases - Hot-spot-driven exploration: Scopes the review using commit history and user direction, then spawns a sub-agent to find shallow modules, seam leakage, and poor locality. - Visual HTML report: Renders candidates as a self-contained Tailwind/Mermaid HTML file in the OS temp directory, with before/after diagrams, recommendation badges, and a top recommendation. - Grilling loop: After the user picks a candidate, walks the decision tree, updates CONTEXT.md domain terms, and offers ADRs for load-bearing rejections. - Use Case: A team notices their order intake flow is scattered across six thin wrappers. Run this Skill to get a visual report of deepening candidates, pick one, and grill through the design of the consolidated deep module. ## Quick Start Ask the assistant to review this codebase for architecture deepening opportunities and show the candidates in an HTML report.