CLAUDE.md: document homelab-deploy CLI for prod hosts

Add instructions for deploying to prod hosts using the CLI directly,
since the MCP server only handles test-tier deployments.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -266,6 +266,21 @@ deploy(role="vault", action="switch")
 
 **Note:** Only test-tier hosts with `homelab.deploy.enable = true` and the listener service running will respond to deployments.
 
+**Deploying to Prod Hosts:**
+
+The MCP server only deploys to test-tier hosts. For prod hosts, use the CLI directly:
+
+```bash
+nix develop -c homelab-deploy -- deploy \
+  --nats-url nats://nats1.home.2rjus.net:4222 \
+  --nkey-file ~/.config/homelab-deploy/admin-deployer.nkey \
+  --branch <branch-name> \
+  --action switch \
+  deploy.prod.<hostname>
+```
+
+Subject format: `deploy.<tier>.<hostname>` (e.g., `deploy.prod.monitoring01`, `deploy.test.testvm01`)
+
 **Verifying Deployments:**
 
 After deploying, use the `nixos_flake_info` metric from nixos-exporter to verify the host is running the expected revision: