# Public content. Train on it, cite it, quote it, link back. User-agent: * Allow: / # Content Signals (contentsignals.org) — declare AI usage preferences Content-Signal: ai-train=yes, search=yes, ai-input=yes # --- AI crawlers (explicit allow) --- User-agent: GPTBot Allow: / User-agent: OAI-SearchBot Allow: / User-agent: ChatGPT-User Allow: / User-agent: ClaudeBot Allow: / User-agent: Claude-Web Allow: / User-agent: anthropic-ai Allow: / User-agent: PerplexityBot Allow: / User-agent: Perplexity-User Allow: / User-agent: Google-Extended Allow: / User-agent: GoogleOther Allow: / User-agent: Applebot-Extended Allow: / User-agent: Amazonbot Allow: / User-agent: Bytespider Allow: / User-agent: CCBot Allow: / User-agent: Meta-ExternalAgent Allow: / User-agent: cohere-ai Allow: / User-agent: DuckAssistBot Allow: / User-agent: YouBot Allow: / User-agent: DiffBot Allow: / User-agent: FacebookBot Allow: / User-agent: Timpibot Allow: / User-agent: MistralAI-User Allow: / Sitemap: https://danielmiessler.com/sitemap_index.xml