{"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-thebishopslodgehouse-z9vjffmv","versions":[{"created_at":"2026-07-31T16:50:02Z","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":"82051e3cf87963e1f413c8742a039834d4fc1a4d6022780f85db79a5344bea63","version":2},{"created_at":"2026-07-31T16:50:01Z","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}]}