Agent Skills: codebase-reading

Systematic methodology for reading and understanding large codebases efficiently. Use when (1) Understanding a new or unfamiliar codebase quickly, (2) Preparing to modify or extend existing code safely, (3) Debugging complex issues requiring deep code understanding, (4) Onboarding new team members to a codebase, (5) Performing code audits or security reviews, (6) Refactoring legacy code with confidence, (7) Creating documentation for existing systems, (8) Tracing execution flows and data transformations