{"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-ejiutwn6","versions":[{"created_at":"2026-06-21T17:49:19Z","element_count":89,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2b79dd9d699ee9b1bef94d396ef9d60426b3ab5b6c7c1277d64e92f6606295d7","version":3},{"created_at":"2026-06-21T17:43:07Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"da4f0ad64edb50cacee60c5bc1028ce5ec5bda9fadf9d5e94a4803b25d467a9d","version":2},{"created_at":"2026-06-21T17:43:05Z","element_count":87,"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}]}