Add robots.txt (allow all crawlers)#694
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Adds docs/en/robots.txt, which the English build copies to the site root (generated/robots.txt -> gtfs.org/robots.txt) — the only location crawlers read, so it is not duplicated per language. Blocks AI-training crawlers (GPTBot, Google-Extended, CCBot, PerplexityBot, Amazonbot, Bytespider, Applebot-Extended, ChatGPT-User) while allowing search/assistant bots (OAI-SearchBot, Claude-Web, ClaudeBot, anthropic-ai), and sets a Content-Signal of ai-train=no, search=yes, ai-input=no for all other agents. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Switch every per-bot rule from Disallow to Allow, so AI-training and assistant/search crawlers (GPTBot, ChatGPT-User, Google-Extended, CCBot, PerplexityBot, Amazonbot, Bytespider, Applebot-Extended, and the already-allowed OAI-SearchBot/Claude-Web/ClaudeBot/anthropic-ai) may all access the site. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Aligns the catch-all Content-Signal with the now allow-all crawler rules: training was previously signalled off (ai-train=no) while every bot was allowed, which was contradictory. Now ai-train=yes, search=yes, ai-input=no. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Summary
Adds
docs/en/robots.txt, which the English build copies verbatim to the site root (generated/robots.txt→gtfs.org/robots.txt).Allow: /.User-agent: *withContent-Signal: ai-train=yes, search=yes, ai-input=noandAllow: /.Why here (not per-language)
robots.txt is only honored at the site root. Only the English config builds to
generated/(the root); every other language builds togenerated/<lang>/, where a robots.txt would be ignored by crawlers. So a single file underdocs/en/is the correct and sufficient placement.Verification
Built the English site locally and confirmed:
generated/robots.txtexists at the site root and is byte-for-byte identical to the source.Note for reviewers
The
Content-Signalwas intentionally set toai-train=yesto stay consistent with the allow-all rules (an earlier draft hadai-train=noalongside allow-all, which was contradictory). Confirm the allow-all training posture is the intended policy.