{"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-odysseysquarebungalo-vm1h67af","versions":[{"created_at":"2026-07-22T04:08:23Z","element_count":85,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9aaf5762e880f46c0667356a8b3028147871417a22b182799f8a407ab72ebf9f","version":2},{"created_at":"2026-07-22T04:08:23Z","element_count":85,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}