{"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-0nuqrdds","versions":[{"created_at":"2026-07-29T01:18:54Z","element_count":119,"note":"loop3: 設計時延床 46.3㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f48e31d84b9953bf9114f207420f91aa75a30bd449df1d72d66d6803b7dcd5d8","version":2},{"created_at":"2026-07-29T01:18:54Z","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}]}