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+# Cloudflare Spectrum Skill Reference
+
+## Overview
+
+Cloudflare Spectrum provides security and acceleration for ANY TCP or UDP-based application. It's a global Layer 4 (L4) reverse proxy running on Cloudflare's edge nodes that routes MQTT, email, file transfer, version control, games, and more through Cloudflare to mask origins and protect from DDoS attacks.
+
+**When to Use Spectrum**: When your protocol isn't HTTP/HTTPS (use Cloudflare proxy for HTTP). Spectrum handles everything else: SSH, gaming, databases, MQTT, SMTP, RDP, custom protocols.
+
+## Plan Capabilities
+
+| Capability | Pro/Business | Enterprise |
+|------------|--------------|------------|
+| TCP protocols | Selected ports only | All ports (1-65535) |
+| UDP protocols | Selected ports only | All ports (1-65535) |
+| Port ranges | ❌ | ✅ |
+| Argo Smart Routing | ✅ | ✅ |
+| IP Firewall | ✅ | ✅ |
+| Load balancer origins | ✅ | ✅ |
+
+## Decision Tree
+
+**What are you trying to do?**
+
+1. **Create/manage Spectrum app**
+   - Via Dashboard → See [Cloudflare Dashboard](https://dash.cloudflare.com)
+   - Via API → See [api.md](api.md) - REST endpoints
+   - Via SDK → See [api.md](api.md) - TypeScript/Python/Go examples
+   - Via IaC → See [configuration.md](configuration.md) - Terraform/Pulumi
+
+2. **Protect specific protocol**
+   - SSH → See [patterns.md](patterns.md#1-ssh-server-protection)
+   - Gaming (Minecraft, etc) → See [patterns.md](patterns.md#2-game-server)
+   - MQTT/IoT → See [patterns.md](patterns.md#3-mqtt-broker)
+   - SMTP/Email → See [patterns.md](patterns.md#4-smtp-relay)
+   - Database → See [patterns.md](patterns.md#5-database-proxy)
+   - RDP → See [patterns.md](patterns.md#6-rdp-remote-desktop)
+
+3. **Choose origin type**
+   - Direct IP (single server) → See [configuration.md](configuration.md#direct-ip-origin)
+   - CNAME (hostname) → See [configuration.md](configuration.md#cname-origin)
+   - Load balancer (HA/failover) → See [configuration.md](configuration.md#load-balancer-origin)
+
+## Reading Order
+
+1. Start with [patterns.md](patterns.md) for your specific protocol
+2. Then [configuration.md](configuration.md) for your origin type
+3. Check [gotchas.md](gotchas.md) before going to production
+4. Use [api.md](api.md) for programmatic access
+
+## See Also
+
+- [Cloudflare Docs](https://developers.cloudflare.com/spectrum/)