{"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-3cwh68cj","versions":[{"created_at":"2026-06-13T16:56:14Z","element_count":88,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"2a7d5b87939eb96b0b114687052fb5cc9f77baa6e8bdb04dd075d3b98143767d","version":3},{"created_at":"2026-06-13T16:47:13Z","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":"8d0c04e75e39c4f57ec6e09b9061bc4e63fc40c0ae51a96b28065ea4cc044315","version":2},{"created_at":"2026-06-13T16:47:12Z","element_count":126,"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}]}