{"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-83smrxyf","versions":[{"created_at":"2026-06-30T06:32:18Z","element_count":71,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9b7daecb2ca02d0fc39ca1d5b397983018d0178ed2ad35a3a41f58717514a4ac","version":3},{"created_at":"2026-06-30T06:20:15Z","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":"87afe38b8149de9b5554732258b535a73ac8da248849bad7b975e8fb2c6ddf9f","version":2},{"created_at":"2026-06-30T06:20:15Z","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}]}