{"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-14x02kn3","versions":[{"created_at":"2026-06-23T06:20:14Z","element_count":82,"note":"5軸GA polish 39->92 by M5 (autonomous)","saved_by":"mcp","sha256":"eecc591655b46624cc8f54f99e1b4ba4a057a85b679bbb22cc39b175523bfff7","version":3},{"created_at":"2026-06-23T06:08:54Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e37eafea3bdeeeda9e0485a978fcc52aef1d89244c440d08ebaad9c78a262ded","version":2},{"created_at":"2026-06-23T06:08:54Z","element_count":101,"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}]}