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 presents concrete deepening refactors as visual before/after diagrams. ## Core Features & Use Cases - Scoped exploration: Uses commit history hot spots or a user-named direction to focus the scan, applying the deletion test to identify shallow modules, seam leakage, and poor locality. - Visual HTML report: Writes a single self-contained HTML file (embedded CSS, inline SVG, no JavaScript or network dependency) to the OS temp directory, with before/after diagrams, recommendation-strength badges, and a top recommendation. - Decision grilling loop: After the user picks a candidate, walks constraints, dependencies, and interface shape via companion skills, updating the domain glossary and living important-decisions document as decisions crystallize. - Use Case: Point it at a subsystem where changes keep bouncing between many small files; it produces a report showing which modules to collapse into one deep module with a single testable interface. ## Quick Start Ask the assistant to review the architecture of the order intake subsystem and show deepening candidates as an HTML report.
