{"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-y36jn06q","versions":[{"created_at":"2026-06-13T20:46:37Z","element_count":89,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"8357421d555abf95d1e007dd898e0df1f1713aadb9f1ff667810f262b397fd32","version":3},{"created_at":"2026-06-13T20:40:39Z","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":"49d528196d3dba64f5c7c2356f23857bf03cb2c0b89b1da8e96d488b45df4882","version":2},{"created_at":"2026-06-13T20:40:38Z","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}]}