Spec Miner

When you inherit a codebase with zero documentation or need to understand what legacy code actually does, this skill systematically reverse engineers it into proper specs. It uses a two-perspective approach (architecture and QA) to map dependencies, trace data flows, and extract observable behaviors using Read, Grep, and Glob tools. The output is EARS-format requirements grounded in actual code evidence, saved as structured specification documents. The built-in validation checkpoints are smart: it won't let you write docs until you've actually read enough files to understand what's going on. Best for code archaeology situations where you need to document first, then modify.