{"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-bsdgfzo0","versions":[{"created_at":"2026-07-24T06:13:15Z","element_count":107,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"62a75d4bf61103143f3ff05ae176945527880ba0f5b0100e33053a6935dcd375","version":2},{"created_at":"2026-07-24T06:13:06Z","element_count":107,"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}]}