Move skills to .agent directory

.agents/skills/agent-ready-cloudflare/a2a-agent-card/SKILL.md

@@ -0,0 +1,35 @@
+---
+name: agent-ready-a2a-agent-card
+description: >
+  Sub-skill de agent-ready-cloudflare: Implement A2A Agent Card
+---
+# Implement A2A Agent Card
+
+Publish an A2A Agent Card for agent-to-agent discovery per the
+[A2A Protocol Specification](https://a2a-protocol.org/latest/specification/).
+
+## Requirements
+
+- Serve JSON at `/.well-known/agent-card.json` with HTTP 200
+- Include `name`, `version`, and `description`
+- Include `supportedInterfaces` with service URL and transport protocol
+- List `capabilities` and `skills` (each with `id`, `name`, `description`)
+
+See [Agent Discovery](https://a2a-protocol.org/latest/topics/agent-discovery/)
+for the full schema.
+
+## Cloudflare
+
+[Agents SDK](https://developers.cloudflare.com/agents/) supports building
+A2A-compatible agents on Workers.
+
+## Validate
+
+```
+POST https://isitagentready.com/api/scan
+Content-Type: application/json
+
+{"url": "https://YOUR-SITE.com"}
+```
+
+Check that `checks.discovery.a2aAgentCard.status` is `"pass"`.