{"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-wwxu1r3x","versions":[{"created_at":"2026-07-24T19:26:36Z","element_count":119,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9e408c0034221deed8d2ed9a6f3cd28e544adf5af5c93e67b8e8b1abfb7cdfac","version":2},{"created_at":"2026-07-24T19:26:36Z","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}]}