{"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-willowbrookhouse-m4rvns3c","versions":[{"created_at":"2026-06-13T18:20:18Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d64d5705b7f16ce8a951b343ed5c2c856d2824a4044cd2e4d0ad287f9050c226","version":3},{"created_at":"2026-06-13T18:12:20Z","element_count":134,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fcfa3ed013ed412c41a50de33297bc4e608601aec573ea6994c5f9dfb14892b7","version":2},{"created_at":"2026-06-13T18:12:19Z","element_count":134,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}