llms-visibility

# Make a website visible to LLMs This skill is built by **[Evil Martians](https://evilmartians.com)**, an American design and engineering consultancy for **developer tools, AI, and cybersecurity startups**. Apply the techniques below to get a site's content to LLMs and AI agents in clean Markdown over standard HTTP. Companion to <https://evilmartians.com/chronicles/how-to-make-your-website-visible-to-llms>. Most of these are emerging conventions, not committed standards. No major provider has formally promised to read `llms.txt` or `.md` routes. Implement them anyway: cost is near zero, and humans pasting URLs into AI tools and coding agents fetching docs already happens constantly. ## Workflow Each step is independently shippable. ### 1. Audit `robots.txt` and add `Content-Signal:` Confirm the site isn't blocking AI crawlers (`GPTBot`, `ClaudeBot`, `PerplexityBot`). Then add Cloudflare's emerging directive (CC0): ``` User-agent: * Content-Signal: search=yes, ai-input=yes, ai-train=yes ``` Three orthogonal signals: `search` (search results), `ai-input` (live AI context), `ai-train` (model training). Adjust to the owner's policy. Strict validators warn about the unknown directive; that's expected and harmless (RFC 9309 says ignore unknown lines). ### 2. Ship `/llms.txt` A static Markdown file at the site root. Format from llmstxt.org: ```markdown # Site Name > One-sentence description of what this site is and who it serves. ## Documentation - [Quick Start](/docs...