Deep Codebase Audit

Surface architectural friction and propose deepening opportunities — refactors that turn shallow modules into deep ones. The aim is testability, AI-navigability, and leverage.

References for this skill are in the references/ folder:

• GLOSSARY.md — vocabulary to use in every suggestion
• DEPTH-GUIDE.md — how to classify dependencies and test across seams
• INTERFACES.md — how to explore alternative interfaces

When to Use

Use this skill when:

• The user says the codebase feels messy, hard to change, or "not ready for AI".
• You want to improve testability and make future TDD or autonomous agent work more effective.
• You're about to invest heavily in AI-driven changes and want to reduce risk first.

Do not use this skill when the user just wants to ship a small feature — use /incremental-tdd instead.