researching

Use when you need to understand how an existing codebase works and/or survey external prior work (papers, methods, tools) before planning or changing something. Traces function call paths, maps module dependencies, searches academic papers and documentation, compares library alternatives. Triggers: research the codebase, how does X work, where is X implemented, what tools or libraries exist for X, prior art on X, has this been done before, survey approaches to X.