{"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-hawthornlodge-pq8mwn6e","versions":[{"created_at":"2026-07-20T14:30:00Z","element_count":84,"note":"5軸GA polish 38->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ab2bf56eb26a2438dde14237b22b6dccd49b7d21ecd1a315a37e49bddc96e8f3","version":3},{"created_at":"2026-07-20T14:20:04Z","element_count":86,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"caa6200cdbba86ecbc9195feaaa746f5b38221bd038717efddfbaf2f78a54b08","version":2},{"created_at":"2026-07-20T14:20:04Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}