{"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-qqqtd7l2","versions":[{"created_at":"2026-06-29T19:38:19Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"5211ba9de24bb6c3aa21ba092cc304e5e2bb6e2d7a01a852e5797680912b64b4","version":3},{"created_at":"2026-06-29T19:34:18Z","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":"779e855d1a1c4680c8608433b74c197f1965154ec7653e5a92c893eb3b7ab466","version":2},{"created_at":"2026-06-29T19:34:17Z","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}]}