{"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-e67cqaf6","versions":[{"created_at":"2026-06-13T17:24:02Z","element_count":84,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4575dbb003b4058d0d8e685dae9bae59aecef683c5185f472bc354f7924226b4","version":3},{"created_at":"2026-06-13T17:06:55Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bc9f9f2c87e4e66c3c42e64c53a4902cd2586370d16a41028bf600297507bcd6","version":2},{"created_at":"2026-06-13T17:06:51Z","element_count":90,"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}]}