code-analysis

Builds an understanding of a whole codebase or subsystem — what it does, how it is structured, where the risk and complexity concentrate, and reports it as a map someone can act on. Use this whenever the user is new to a repo, inherits unfamiliar code, asks how something works end to end, wants an architecture overview or health assessment, or is deciding whether to refactor, extend, or replace. For reviewing a specific change, use code-review.