{"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-house-okzx3xrx","versions":[{"created_at":"2026-06-17T06:03:10Z","element_count":85,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"15ef5359079921cbc3b2157f25cf98891afa0dc53dd5d7fbac9aeaf4631c87d1","version":3},{"created_at":"2026-06-17T05:57:35Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"65df4abef917fc47e7698fc06e5ca31a684ba2ee1f9ca7797ed936dd685876c2","version":2},{"created_at":"2026-06-17T05:57:35Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}