{"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-8i9autto","versions":[{"created_at":"2026-07-03T19:41:50Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"b96e9968df6c6837e4152a036a3b129d01e806b95556e079fb81945e7ba9a620","version":3},{"created_at":"2026-07-03T19:34:39Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ee8824bc9261fdddb65285cc7eb68a60a2865f30dbdca89836c9943ef87c3616","version":2},{"created_at":"2026-07-03T19:34:39Z","element_count":89,"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}]}