{"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-thewillowhouse-75bqawdn","versions":[{"created_at":"2026-07-13T10:49:14Z","element_count":88,"note":"5軸GA polish 40->93 by M5 (autonomous)","saved_by":"mcp","sha256":"dacb61e86aeeea018ce3c7ef8280afa63a6a00a697d385b641d8f2f19d550fd3","version":3},{"created_at":"2026-07-13T10:36:20Z","element_count":83,"note":"loop3: 設計時延床 78.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9e45bde88cee6d64de8d78e306cea0133db3c8527b6f97e6ecd1002678bcb94d","version":2},{"created_at":"2026-07-13T10:36:20Z","element_count":83,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}