{"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-nwpjumtx","versions":[{"created_at":"2026-06-15T06:08:52Z","element_count":74,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"1a388ab8022587346b92386feaf8b890d51e65922b1de6f2dc2dd4808231f2e1","version":3},{"created_at":"2026-06-15T05:54:01Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e91db39f2ebbfa712fdf2836b0205f2dc3c28a94c28ea4d015e87c2e0bc50d9f","version":2},{"created_at":"2026-06-15T05:54:01Z","element_count":126,"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}]}