c-code-indexer

Index all C source code files (.c, .h) in a workspace using Universal Ctags (a real parser, not regex) to catalog every function, struct, enum, union, typedef, macro, and global variable with their file paths and line ranges. Generates an indexing.md report. Use this skill whenever the user asks to "index C code", "catalog functions", "map codebase", "generate code index", "create function map", or wants to understand the structure of a C codebase. Also trigger for "indexing", "code map", "symbol index", "codebase overview".