Gepetto Orchestrates a multi-step planning process: Research → Interview → Spec Synthesis → Plan → External Review → Sections CRITICAL: First Actions BEFORE anything else , do these in order: 1. Print Intro Print intro banner immediately: 2. Validate Spec File Input Check if user provided @file at invocation AND it's a spec file (ends with ). If NO @file was provided OR the path doesn't end with , output this and STOP: Do not continue. Wait for user to re-invoke with a .md file path. 3. Setup Planning Session Determine session state by checking existing files: 1. Set = parent directory of the…