Generate multi-audience documentation from any codebase — workflows for non-technical readers, architecture for developers, and AI orientation for agents. Deterministic JS scripts handle structural extraction; the agent writes the prose. Project-agnostic and self-orienting. Use when the user asks to "document this project", runs `/document-this`, runs `/document-this <file-path>`, runs `/document-this --focus "<Feature Name>"` for a deep-dive on one subsystem in a named subfolder, or wants fresh documentation reflecting the current codebase state.