cc-libs/docs/public-ports.md

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# Public Production Ports
TrapOS public production services use the `4242-4244` TCP range. Keep local developer defaults separate from these public ports so tests and local tools can run without binding production-facing addresses.
| Port | Service | Notes |
|---|---|---|
| `4242` | opencode server HTTP API | Production/public port for `opencode serve`. Local/dev examples may still use opencode's default `4096`. |
| `4243` | ComputerCraft bridge WebSocket | Production/public equivalent of the local bridge link default `3001`. Use `CC_LINK_PORT=4243` for production bridge deployments. |
| `4244` | Reserved | Free public production port reserved for a future service. Do not assign it casually in local tooling. |
## Local Vs Production
- Local/dev opencode: `http://127.0.0.1:4096`.
- Public/production opencode: `http://<public-host>:4242`.
- Local/dev ComputerCraft bridge link: `ws://<host>:3001`.
- Public/production ComputerCraft bridge link: `ws://<public-host>:4243`.
Production services exposed on public ports should use the normal deployment controls for the host: authentication where supported, firewall rules, and TLS or a reverse proxy when crossing untrusted networks.