{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-willowbrookhouse-o7vo3r6h","versions":[{"created_at":"2026-06-13T19:45:39Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"40a9c7fc901797effa742d92973dd7fb1932a4eb5d2d2f027d564aa4b3e28131","version":3},{"created_at":"2026-06-13T19:19:59Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2c10a446a8af231c61ba07b54cb96591da6d236fd192147a09721319a9a259c1","version":2},{"created_at":"2026-06-13T19:19:59Z","element_count":89,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}