We read the robots.txt of 151 big websites. The syntax was fine. The problems were elsewhere.
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On 29 October 2026 we fetched the robots.txt of 151 large websites (news, shops, SaaS, docs, social networks, education, SEO) and ran every file through a linter. 135 files could be read. The short version 44% block at least one of the six best-known AI crawlers (GPTBot, ClaudeBot, CCBot, Google-Ex…
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- 2026-10-29 21:46 · DEV Community — AI
We read the robots.txt of 151 big websites. The syntax was fine. The problems were elsewhere.