Map an existing codebase into the gener8v pipeline bottom-up: system context, one specification per capability area with requirement IDs, a PRD synthesized from the code, and @spec annotations in source. Use when onboarding existing code that has no .gener8v/prd.md, such as 'bring this repo into the pipeline' or 'retrofit specs onto this code'. Not for a product with no code yet (planning) or a project that already has a PRD (orchestrate).
