{"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-q8lzsv1t","versions":[{"created_at":"2026-07-19T05:52:27Z","element_count":84,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"d27b9dcfe361441a7dc3da02a30263e4b8f5a51cacf06f78809ce93da5a230cd","version":3},{"created_at":"2026-07-19T05:48:26Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"034a86a318d44d85e79bee40988cc1c2bace7672d7231f62a639f7a4dd96baf5","version":2},{"created_at":"2026-07-19T05:48:26Z","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}]}