The plan pins gpui-kit 0.7.3 (locked to gpui-pre 0.3.9) as the client stack, keeps the backend untouched behind the existing HTTP/WS API, and ships the client for Windows, macOS and Linux. The dev baseline records the verified versions, the knowledge sources that outrank memory, the entry-point skeleton, and the platform facts the next sessions must not relitigate. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>