# Overview
URL: /docs/runtimes/opencode/overview

Connect to an OpenCode coding-agent server.

`@assistant-ui/react-opencode` is a runtime adapter for [OpenCode](https://opencode.ai/), an open-source AI coding agent. It wires the OpenCode server's session and event APIs into an assistant-ui thread, including tool permissions, interactive questions, and session state.

<Callout type="warn">
  This adapter is at v0.0.3 and is experimental. The runtime API and exported hooks may change without notice.
</Callout>

## When to use it \[#when-to-use-it]

Pick the OpenCode runtime when:

* You are building a UI on top of an OpenCode agent server.
* You need first-class support for OpenCode's permission and question flows.
* You want session-aware features: fork, revert, unrevert, refresh.

If your backend is not OpenCode-based, see [picking a runtime](/docs/runtimes/pick-a-runtime) for alternatives.

## Architecture \[#architecture]

`@assistant-ui/react-opencode` is layered on `ExternalStoreRuntime` plus a `RemoteThreadList` for session-backed thread management (see [architecture](/docs/runtimes/concepts/architecture)). OpenCode sessions map to assistant-ui threads; the runtime subscribes to a server-sent event stream and projects messages into the thread.

## Requirements \[#requirements]

* A running [OpenCode](https://opencode.ai/) server (defaults to `http://localhost:4096`).
* React 18 or 19.

## Install \[#install]

<InstallCommand npm="[&#x22;@assistant-ui/react&#x22;, &#x22;@assistant-ui/react-opencode&#x22;, &#x22;@opencode-ai/sdk&#x22;]" />

## Next \[#next]

<Cards>
  <Card title="Quickstart" description="Minimal useOpenCodeRuntime setup against a local OpenCode server." href="/docs/runtimes/opencode/quickstart" />

  <Card title="Hooks" description="Permissions, questions, session state, runtime extras." href="/docs/runtimes/opencode/hooks" />
</Cards>