{"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-20j7xj7x","versions":[{"created_at":"2026-06-22T19:39:37Z","element_count":73,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b405eece49a670564947735700e196d5d00f2f23157508224309ee00ff8b94db","version":3},{"created_at":"2026-06-22T19:27:06Z","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":"108bd87b2b591a7d5ae15ffbe5719fabfe0863cf4bf4825b9790a9e2f228f69a","version":2},{"created_at":"2026-06-22T19:27:01Z","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}]}