Move skills to .agent directory

.agents/skills/agent-ready-cloudflare/link-headers/SKILL.md

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+---
+name: agent-ready-link-headers
+description: >
+  Sub-skill de agent-ready-cloudflare: Implement Link Response Headers
+---
+# Implement Link Response Headers
+
+Add Link response headers to your homepage for agent discovery per
+[RFC 8288](https://www.rfc-editor.org/rfc/rfc8288) and
+[RFC 9727 Section 3](https://www.rfc-editor.org/rfc/rfc9727#section-3).
+
+## Requirements
+
+- Return `Link` headers on your homepage response pointing to machine-readable resources
+- Use registered relation types: `api-catalog`, `service-desc`, `service-doc`, `describedby`
+- Example: `Link: </.well-known/api-catalog>; rel="api-catalog"`
+- Multiple Link headers or comma-separated values are both valid
+
+## Cloudflare
+
+Use [Transform Rules](https://developers.cloudflare.com/rules/transform/) or
+[Workers](https://developers.cloudflare.com/workers/) to add Link headers
+without modifying your origin server.
+
+## Validate
+
+```
+POST https://isitagentready.com/api/scan
+Content-Type: application/json
+
+{"url": "https://YOUR-SITE.com"}
+```
+
+Check that `checks.discoverability.linkHeaders.status` is `"pass"`.