{"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-cornerplacebungalow-9qnb267t","versions":[{"created_at":"2026-06-24T04:37:12Z","element_count":90,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"9901ffaaf572cebc58e66c4adf90dedbc3b95f5cb5de577ccf9d1728b9e666f3","version":3},{"created_at":"2026-06-24T04:29:43Z","element_count":119,"note":"loop3: 設計時延床 50.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8e317907916576c5b793b5690bdeb9194fa6a21a6a748bf1bdbcbcd45f54b303","version":2},{"created_at":"2026-06-24T04:29:43Z","element_count":119,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}