{"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-0yx11qww","versions":[{"created_at":"2026-07-08T06:05:45Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2bc5160e173d1041dd89fcfd1952cbb131827ea470fd1bcb085c5866a40610dc","version":3},{"created_at":"2026-07-08T05:58:05Z","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":"6085d50af4a8925f6af7d0144c91afecc9ed0892c359292ae2a13d4a42d0bc2d","version":2},{"created_at":"2026-07-08T05:58:05Z","element_count":134,"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}]}