{"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-9wlav3bz","versions":[{"created_at":"2026-07-17T19:41:23Z","element_count":85,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"9edfd9b6486bdab997ad644e45e194508209dccfd8b5ac3b63fbb8e1b9c8f4f0","version":3},{"created_at":"2026-07-17T19:32:50Z","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":"3980026754da9db74316eb4165ed394e0e2f5e7a269b8deef87f301f34daf0ca","version":2},{"created_at":"2026-07-17T19:32:48Z","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}]}