{"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-0l6kng4k","versions":[{"created_at":"2026-07-24T06:18:39Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0df93636d5a2c37d296a15c2774c72352737dd019dec9c6a8a8659c7bb19086a","version":2},{"created_at":"2026-07-24T06:18:32Z","element_count":105,"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}]}