{"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-house-6eyqy976","versions":[{"created_at":"2026-06-19T06:02:19Z","element_count":88,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"a040cccdd147f9ed42309f8431ef242355312526cf47668e70ecefa7b95cafa0","version":3},{"created_at":"2026-06-19T05:52:46Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fe9686d2b2b2f731e943574b7320967d89e1655e1bb086f5190c9d3b3b341615","version":2},{"created_at":"2026-06-19T05:52:44Z","element_count":86,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}