{"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-j5yruk69","versions":[{"created_at":"2026-08-04T06:06:57Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"98026168228bb4332a4db62996eb71eb2d458354a553d92558747b261b1023f0","version":2},{"created_at":"2026-08-04T06:06:57Z","element_count":101,"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}]}