{"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-u73gxj4g","versions":[{"created_at":"2026-06-16T06:24:38Z","element_count":82,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"66462a3b83038e26c54192c2dc6139e1f33476fbba2b1d1168246b77d244cef1","version":3},{"created_at":"2026-06-16T06:15:44Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"09217e02d436b9597fcfa87e9938878c4cf9c1ba63002a87f2ce3e20b6b8c16f","version":2},{"created_at":"2026-06-16T06:15:42Z","element_count":101,"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}]}