{"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-u010jwjc","versions":[{"created_at":"2026-06-13T14:35:12Z","element_count":84,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"0a5b1fd011f7747b2622b8660b02acab06bcdacbf390f91f8883251c4603ed05","version":3},{"created_at":"2026-06-13T14:26:19Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b7a47e19bd132ef7a1eea5ca4909614b0614d34dad9c851233912129c738044f","version":2},{"created_at":"2026-06-13T14:26:18Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}