{"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-maplewoodbungalow-umrx3buj","versions":[{"created_at":"2026-08-04T10:13:48Z","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":"c25c7f30d398f2614ecda0036ecf15c8496269589aff0e9763699d3ca4163bd4","version":2},{"created_at":"2026-08-04T10:13:48Z","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}]}