{"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-morrisviewhouse-h5gakdx2","versions":[{"created_at":"2026-08-14T15:21:59Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7b3332334b86970826c3a270cd1b1de5706dd40b4b4a6c9c01e4d5762d308ee0","version":2},{"created_at":"2026-08-14T15:21:58Z","element_count":130,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}