{"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-8zp85dk7","versions":[{"created_at":"2026-07-02T19:42:32Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"95563d12713819c462ac64ae839f97ca1b63d8702d4e24740edabecb1cd7b0de","version":3},{"created_at":"2026-07-02T19:31:09Z","element_count":84,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"55d49b95aeb7b7119e8284aa0a264ef62001ba60c960d9f5bb0a96bb1852ace0","version":2},{"created_at":"2026-07-02T19:31:08Z","element_count":84,"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}]}