{"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-sqsclaaz","versions":[{"created_at":"2026-06-13T14:20:32Z","element_count":71,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"3b9d93d268eac35831604011e8935d8872edff98733fea9d5a20dc7994180e42","version":3},{"created_at":"2026-06-13T14:11:55Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5d8575671861a0da6393342687c714780c35fdda96a337b2d753dc0c58eda46f","version":2},{"created_at":"2026-06-13T14:11:54Z","element_count":134,"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}]}