Reads a source code file and returns ONLY its structural skeleton (imports, type definitions, class declarations, function signatures with parameter types and return types). Internal logic is replaced with '/* ... [omitted by ContextGC] ... */'. Use this tool FIRST when exploring files larger than 100 lines to save 70-90% context tokens. After reviewing the skeleton, use read_function_body to expand specific functions.

Expands the full implementation of a specific function/method from a file. Use AFTER read_code_skeleton when you need to see a particular function's logic. This returns ONLY the requested function's complete body, not the entire file.

Parses and compresses error logs / stack traces to extract only the essential error information. Filters out node_modules frames, keeps only your source code references. Use this instead of reading raw stderr output to save 90%+ tokens.

Trigger context garbage collection. This clears cached file skeletons that are no longer needed, freeing context window space. Use this when you notice context is getting full or after completing a task branch.