SEO crawlers were downloading the release archives (up to about 2 GB each) even though they are served noindex. Disallow only *.tar.zst and *.zip under /tarballz/; the index page and the PKGBUILDs stay crawlable. Repeated in every group, because a crawler with its own group ignores User-agent: *. Claude-Session: https://claude.ai/code/session_01GGe7kUhooMFuzY6GaDb2w9