How to implement and verify AI bot access in robots.txt

In your `robots.txt`, explicitly allow or disallow AI crawlers. To allow AI indexing (Perplexity, ChatGPT, Claude, Gemini), include `Allow: /` for those user agents. To disallow, use `Disallow: /` for specific bots. Document your policy. Test by checking access logs for bot visits. Verify with the bots' documentation on user agent names.