Search the codebase for symbols, files, or concepts. Works equally well for exact names ('UserStatus'), file paths ('types/enums'), or natural language ('how authentication works'). Returns name, kind, file path with line ranges (file:start-end), and confidence [H/M/L]. Use built-in Read with offset=line_start, limit=line_end-line_start to get source. Use this FIRST — replaces grep and glob.

Get a symbol's connections (callers, callees, imports) with file:line ranges. Use AFTER search. Then use built-in Read with those line ranges to get implementation details. Replaces reading whole files — read only the specific line ranges shown.

Trace the shortest path between two symbols in the codebase graph.

Complete blast radius of changing a symbol. Exhaustive traversal of ALL edge types. Returns every affected file with symbols to check. Use before refactoring. Files not listed do not depend on the target.

Read full source files from disk. EXPENSIVE. Prefer built-in Read with line ranges from search/node results instead. Use this only when you need a whole file that search/node didn't cover.