Move skills to .agent directory

.agents/skills/agent-ready-cloudflare/markdown-negotiation/SKILL.md

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+---
+name: agent-ready-markdown-negotiation
+description: >
+  Sub-skill de agent-ready-cloudflare: Implement Markdown Content Negotiation
+---
+# Implement Markdown Content Negotiation
+
+Support `Accept: text/markdown` content negotiation so agents can request
+markdown versions of your pages.
+See [llmstxt.org](https://llmstxt.org/) and
+[Markdown for Agents](https://developers.cloudflare.com/fundamentals/reference/markdown-for-agents/).
+
+## Requirements
+
+- When a request includes `Accept: text/markdown`, return a markdown representation of the page
+- Set `Content-Type: text/markdown` on the response
+- HTML remains the default for requests without the markdown accept header
+- Include an `x-markdown-tokens` header with the token count if available
+
+## Cloudflare
+
+[Markdown for Agents](https://developers.cloudflare.com/fundamentals/reference/markdown-for-agents/)
+enables this automatically for Cloudflare zones — no application code changes needed.
+
+## Validate
+
+```
+POST https://isitagentready.com/api/scan
+Content-Type: application/json
+
+{"url": "https://YOUR-SITE.com"}
+```
+
+Check that `checks.contentAccessibility.markdownNegotiation.status` is `"pass"`.