{"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-xa3lsnla","versions":[{"created_at":"2026-06-14T06:08:44Z","element_count":84,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"a1695d04450d57394b200a871fd47953f02d84da712a2f78e0044b1c8b32ca77","version":3},{"created_at":"2026-06-14T05:59:26Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"36de926a6336fc8ebb6691640be82251d64bfdf4f24c53f5c6bbe5ebdef56e25","version":2},{"created_at":"2026-06-14T05:59:26Z","element_count":119,"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}]}