{"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-mz5kybf0","versions":[{"created_at":"2026-07-04T19:34:15Z","element_count":69,"note":"5軸GA polish 39->91 by M5 (autonomous)","saved_by":"mcp","sha256":"c771c36f79fd5006875fc18579d7ab2903dbfcba8c2456ce6c0125271534a35d","version":3},{"created_at":"2026-07-04T19:26:19Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e6f64c4547e9e64dc31ee97a256156ac7f63d904bd4644928bffdbae1b16b8b5","version":2},{"created_at":"2026-07-04T19:26:19Z","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}]}