prd-to-json-implementation

Transform PRD specifications into structured PRD.json files with reference documents, or implement existing PRD.json user stories. Use when user asks to convert PRD to PRD.json with decomposition into user stories and tasks, or implement one or multiple user stories from an existing PRD.json. Handles creating PRD.json with reference_document metadata, implementing tasks sequentially with status updates, running tests including TypeScript, stashing after each completed US, and making a single final commit.