{"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-3jj9jfdl","versions":[{"created_at":"2026-06-13T14:20:31Z","element_count":85,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"05179ada0762c9bfed90edf0f32f4b22166326f3bf7a60b0171c40407503bc61","version":3},{"created_at":"2026-06-13T14:10:41Z","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":"4bc96e008a8d549d3825f396dace162da82f5eb8ef93fe7db9133a5ca6552469","version":2},{"created_at":"2026-06-13T14:10:39Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}