User-agent: Googlebot Allow: / User-agent: Bingbot Allow: / User-agent: Twitterbot Allow: / User-agent: facebookexternalhit Allow: / # AI/LLM Crawlers User-agent: GPTBot Allow: / User-agent: ChatGPT-User Allow: / User-agent: CCBot Allow: / User-agent: anthropic-ai Allow: / User-agent: ClaudeBot Allow: / User-agent: Claude-Web Allow: / User-agent: PerplexityBot Allow: / User-agent: YouBot Allow: / User-agent: Applebot-Extended Allow: / User-agent: Google-Extended Allow: / User-agent: * Allow: / # Sitemap location Sitemap: https://columnar.tech/sitemap.xml