{"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-f2jlnujz","versions":[{"created_at":"2026-07-05T17:47:01Z","element_count":83,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"5097b34fec187da615c2a08c7ce0f7e7c6b45493324a7279373694993ab5c632","version":3},{"created_at":"2026-07-05T17:35:54Z","element_count":83,"note":"loop3: 設計時延床 54.2㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"81f8b89f7d5cc26f42624ab088e1cb1e7738d3115f91db7916233450e053ad78","version":2},{"created_at":"2026-07-05T17:35:54Z","element_count":83,"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}]}