{"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-9z4ljwxp","versions":[{"created_at":"2026-06-25T07:21:03Z","element_count":82,"note":"5軸GA polish 39->92 by M5 (autonomous)","saved_by":"mcp","sha256":"f4dd255487bd2e833e58639182dae1c17c0b741f29ae8d8ef2ab7ea0a64772a1","version":3},{"created_at":"2026-06-25T07:15:59Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e3dea1c92e0011de0e1dd51d3445250dbfa7b4eddef40cd9f1e50d7bff1e842d","version":2},{"created_at":"2026-06-25T07:15:59Z","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}]}