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title: SDK
description: Type-safe JS client for opencode server.
---
import config from "../../../config.mjs"
export const typesUrl = `${config.github}/blob/dev/packages/sdk/js/src/gen/types.gen.ts`
The opencode JS/TS SDK provides a type-safe client for interacting with the server.
Use it to build integrations and control opencode programmatically.
[Learn more](/docs/server) about how the server works. For examples, check out the [projects](/docs/ecosystem#projects) built by the community.
---
## Install
Install the SDK from npm:
```bash
npm install @opencode-ai/sdk
```
---
## Create client
Create an instance of opencode:
```javascript
import { createOpencode } from "@opencode-ai/sdk"
const { client } = await createOpencode()
```
This starts both a server and a client
#### Options
| Option | Type | Description | Default |
| ---------- | ------------- | ------------------------------ | ----------- |
| `hostname` | `string` | Server hostname | `127.0.0.1` |
| `port` | `number` | Server port | `4096` |
| `signal` | `AbortSignal` | Abort signal for cancellation | `undefined` |
| `timeout` | `number` | Timeout in ms for server start | `5000` |
| `config` | `Config` | Configuration object | `{}` |
---
## Config
You can pass a configuration object to customize behavior. The instance still picks up your `opencode.json`, but you can override or add configuration inline:
```javascript
import { createOpencode } from "@opencode-ai/sdk"
const opencode = await createOpencode({
hostname: "127.0.0.1",
port: 4096,
config: {
model: "anthropic/claude-3-5-sonnet-20241022",
},
})
console.log(`Server running at ${opencode.server.url}`)
opencode.server.close()
```
## Client only
If you already have a running instance of opencode, you can create a client instance to connect to it:
```javascript
import { createOpencodeClient } from "@opencode-ai/sdk"
const client = createOpencodeClient({
baseUrl: "http://localhost:4096",
})
```
#### Options
| Option | Type | Description | Default |
| --------------- | ---------- | -------------------------------- | ----------------------- |
| `baseUrl` | `string` | URL of the server | `http://localhost:4096` |
| `fetch` | `function` | Custom fetch implementation | `globalThis.fetch` |
| `parseAs` | `string` | Response parsing method | `auto` |
| `responseStyle` | `string` | Return style: `data` or `fields` | `fields` |
| `throwOnError` | `boolean` | Throw errors instead of return | `false` |
---
## Types
The SDK includes TypeScript definitions for all API types. Import them directly:
```typescript
import type { Session, Message, Part } from "@opencode-ai/sdk"
```
All types are generated from the server's OpenAPI specification and available in the <a href={typesUrl}>types file</a>.
---
## Errors
The SDK can throw errors that you can catch and handle:
```typescript
try {
await client.session.get({ path: { id: "invalid-id" } })
} catch (error) {
console.error("Failed to get session:", (error as Error).message)
}
```
---
## Structured Output
You can request structured JSON output from the model by specifying an `format` with a JSON schema. The model will use a `StructuredOutput` tool to return validated JSON matching your schema.
### Basic Usage
```typescript
const result = await client.session.prompt({
path: { id: sessionId },
body: {
parts: [{ type: "text", text: "Research Anthropic and provide company info" }],
format: {
type: "json_schema",
schema: {
type: "object",
properties: {
company: { type: "string", description: "Company name" },
founded: { type: "number", description: "Year founded" },
products: {
type: "array",
items: { type: "string" },
description: "Main products",
},
},
required: ["company", "founded"],
},
},
},
})
// Access the structured output
console.log(result.data.info.structured_output)
// { company: "Anthropic", founded: 2021, products: ["Claude", "Claude API"] }
```
### Output Format Types
| Type | Description |
| ------------- | ------------------------------------------------------ |
| `text` | Default. Standard text response (no structured output) |
| `json_schema` | Returns validated JSON matching the provided schema |
### JSON Schema Format
When using `type: 'json_schema'`, provide:
| Field | Type | Description |
| ------------ | --------------- | ---------------------------------------------------------- |
| `type` | `'json_schema'` | Required. Specifies JSON schema mode |
| `schema` | `object` | Required. JSON Schema object defining the output structure |
| `retryCount` | `number` | Optional. Number of validation retries (default: 2) |
### Error Handling
If the model fails to produce valid structured output after all retries, the response will include a `StructuredOutputError`:
```typescript
if (result.data.info.error?.name === "StructuredOutputError") {
console.error("Failed to produce structured output:", result.data.info.error.message)
console.error("Attempts:", result.data.info.error.retries)
}
```
### Best Practices
1. **Provide clear descriptions** in your schema properties to help the model understand what data to extract
2. **Use `required`** to specify which fields must be present
3. **Keep schemas focused** - complex nested schemas may be harder for the model to fill correctly
4. **Set appropriate `retryCount`** - increase for complex schemas, decrease for simple ones
---
## APIs
The SDK exposes all server APIs through a type-safe client.
---
### Global
| Method | Description | Response |
| ----------------- | ------------------------------- | ------------------------------------ |
| `global.health()` | Check server health and version | `{ healthy: true, version: string }` |
---
#### Examples
```javascript
const health = await client.global.health()
console.log(health.data.version)
```
---
### App
| Method | Description | Response |
| -------------- | ------------------------- | ------------------------------------------- |
| `app.log()` | Write a log entry | `boolean` |
| `app.agents()` | List all available agents | <a href={typesUrl}><code>Agent[]</code></a> |
---
#### Examples
```javascript
// Write a log entry
await client.app.log({
body: {
service: "my-app",
level: "info",
message: "Operation completed",
},
})
// List available agents
const agents = await client.app.agents()
```
---
### Project
| Method | Description | Response |
| ------------------- | ------------------- | --------------------------------------------- |
| `project.list()` | List all projects | <a href={typesUrl}><code>Project[]</code></a> |
| `project.current()` | Get current project | <a href={typesUrl}><code>Project</code></a> |
---
#### Examples
```javascript
// List all projects
const projects = await client.project.list()
// Get current project
const currentProject = await client.project.current()
```
---
### Path
| Method | Description | Response |
| ------------ | ---------------- | ---------------------------------------- |
| `path.get()` | Get current path | <a href={typesUrl}><code>Path</code></a> |
---
#### Examples
```javascript
// Get current path information
const pathInfo = await client.path.get()
```
---
### Config
| Method | Description | Response |
| -------------------- | --------------------------------- | ----------------------------------------------------------------------------------------------------- |
| `config.get()` | Get config info | <a href={typesUrl}><code>Config</code></a> |
| `config.providers()` | List providers and default models | `{ providers: `<a href={typesUrl}><code>Provider[]</code></a>`, default: { [key: string]: string } }` |
---
#### Examples
```javascript
const config = await client.config.get()
const { providers, default: defaults } = await client.config.providers()
```
---
### Sessions
| Method | Description | Notes |
| ---------------------------------------------------------- | ---------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `session.list()` | List sessions | Returns <a href={typesUrl}><code>Session[]</code></a> |
| `session.get({ path })` | Get session | Returns <a href={typesUrl}><code>Session</code></a> |
| `session.children({ path })` | List child sessions | Returns <a href={typesUrl}><code>Session[]</code></a> |
| `session.create({ body })` | Create session | Returns <a href={typesUrl}><code>Session</code></a> |
| `session.delete({ path })` | Delete session | Returns `boolean` |
| `session.update({ path, body })` | Update session properties | Returns <a href={typesUrl}><code>Session</code></a> |
| `session.init({ path, body })` | Analyze app and create `AGENTS.md` | Returns `boolean` |
| `session.abort({ path })` | Abort a running session | Returns `boolean` |
| `session.share({ path })` | Share session | Returns <a href={typesUrl}><code>Session</code></a> |
| `session.unshare({ path })` | Unshare session | Returns <a href={typesUrl}><code>Session</code></a> |
| `session.summarize({ path, body })` | Summarize session | Returns `boolean` |
| `session.messages({ path })` | List messages in a session | Returns `{ info: `<a href={typesUrl}><code>Message</code></a>`, parts: `<a href={typesUrl}><code>Part[]</code></a>`}[]` |
| `session.message({ path })` | Get message details | Returns `{ info: `<a href={typesUrl}><code>Message</code></a>`, parts: `<a href={typesUrl}><code>Part[]</code></a>`}` |
| `session.prompt({ path, body })` | Send prompt message | `body.noReply: true` returns UserMessage (context only). Default returns <a href={typesUrl}><code>AssistantMessage</code></a> with AI response. Supports `body.outputFormat` for [structured output](#structured-output) |
| `session.command({ path, body })` | Send command to session | Returns `{ info: `<a href={typesUrl}><code>AssistantMessage</code></a>`, parts: `<a href={typesUrl}><code>Part[]</code></a>`}` |
| `session.shell({ path, body })` | Run a shell command | Returns <a href={typesUrl}><code>AssistantMessage</code></a> |
| `session.revert({ path, body })` | Revert a message | Returns <a href={typesUrl}><code>Session</code></a> |
| `session.unrevert({ path })` | Restore reverted messages | Returns <a href={typesUrl}><code>Session</code></a> |
| `postSessionByIdPermissionsByPermissionId({ path, body })` | Respond to a permission request | Returns `boolean` |
---
#### Examples
```javascript
// Create and manage sessions
const session = await client.session.create({
body: { title: "My session" },
})
const sessions = await client.session.list()
// Send a prompt message
const result = await client.session.prompt({
path: { id: session.id },
body: {
model: { providerID: "anthropic", modelID: "claude-3-5-sonnet-20241022" },
parts: [{ type: "text", text: "Hello!" }],
},
})
// Inject context without triggering AI response (useful for plugins)
await client.session.prompt({
path: { id: session.id },
body: {
noReply: true,
parts: [{ type: "text", text: "You are a helpful assistant." }],
},
})
```
---
### Files
| Method | Description | Response |
| ------------------------- | ---------------------------------- | ------------------------------------------------------------------------------------------- |
| `find.text({ query })` | Search for text in files | Array of match objects with `path`, `lines`, `line_number`, `absolute_offset`, `submatches` |
| `find.files({ query })` | Find files and directories by name | `string[]` (paths) |
| `find.symbols({ query })` | Find workspace symbols | <a href={typesUrl}><code>Symbol[]</code></a> |
| `file.read({ query })` | Read a file | `{ type: "raw" \| "patch", content: string }` |
| `file.status({ query? })` | Get status for tracked files | <a href={typesUrl}><code>File[]</code></a> |
`find.files` supports a few optional query fields:
- `type`: `"file"` or `"directory"`
- `directory`: override the project root for the search
- `limit`: max results (1–200)
---
#### Examples
```javascript
// Search and read files
const textResults = await client.find.text({
query: { pattern: "function.*opencode" },
})
const files = await client.find.files({
query: { query: "*.ts", type: "file" },
})
const directories = await client.find.files({
query: { query: "packages", type: "directory", limit: 20 },
})
const content = await client.file.read({
query: { path: "src/index.ts" },
})
```
---
### TUI
| Method | Description | Response |
| ------------------------------ | ------------------------- | --------- |
| `tui.appendPrompt({ body })` | Append text to the prompt | `boolean` |
| `tui.openHelp()` | Open the help dialog | `boolean` |
| `tui.openSessions()` | Open the session selector | `boolean` |
| `tui.openThemes()` | Open the theme selector | `boolean` |
| `tui.openModels()` | Open the model selector | `boolean` |
| `tui.submitPrompt()` | Submit the current prompt | `boolean` |
| `tui.clearPrompt()` | Clear the prompt | `boolean` |
| `tui.executeCommand({ body })` | Execute a command | `boolean` |
| `tui.showToast({ body })` | Show toast notification | `boolean` |
---
#### Examples
```javascript
// Control TUI interface
await client.tui.appendPrompt({
body: { text: "Add this to prompt" },
})
await client.tui.showToast({
body: { message: "Task completed", variant: "success" },
})
```
---
### Auth
| Method | Description | Response |
| ------------------- | ------------------------------ | --------- |
| `auth.set({ ... })` | Set authentication credentials | `boolean` |
---
#### Examples
```javascript
await client.auth.set({
path: { id: "anthropic" },
body: { type: "api", key: "your-api-key" },
})
```
---
### Events
| Method | Description | Response |
| ------------------- | ------------------------- | ------------------------- |
| `event.subscribe()` | Server-sent events stream | Server-sent events stream |
---
#### Examples
```javascript
// Listen to real-time events
const events = await client.event.subscribe()
for await (const event of events.stream) {
console.log("Event:", event.type, event.properties)
}
```
|