{"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-riverviewbungalow-9g3br96d","versions":[{"created_at":"2026-07-23T15:21:04Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3043e8859ef13b27d6993caa5ce5d56db54b69a8bd26497a97cc573691ac167a","version":2},{"created_at":"2026-07-23T15:21:04Z","element_count":87,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}