{"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-k4ytozjm","versions":[{"created_at":"2026-06-13T21:13:24Z","element_count":68,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"1d89124e15d0a9f88ec10fc4f16f09012072a2470b19a5def55f83ad776d7717","version":3},{"created_at":"2026-06-13T20:58:00Z","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":"199e8e6f1392b76a8555938e834a22cf33c793f099fc9176addabc8656394574","version":2},{"created_at":"2026-06-13T20:57:59Z","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}]}