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SDK

packages/web/src/content/docs/sdk.mdx

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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 about how the server works. For examples, check out the 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

OptionTypeDescriptionDefault
hostnamestringServer hostname127.0.0.1
portnumberServer port4096
signalAbortSignalAbort signal for cancellationundefined
timeoutnumberTimeout in ms for server start5000
configConfigConfiguration 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

OptionTypeDescriptionDefault
baseUrlstringURL of the serverhttp://localhost:4096
fetchfunctionCustom fetch implementationglobalThis.fetch
parseAsstringResponse parsing methodauto
responseStylestringReturn style: data or fieldsfields
throwOnErrorbooleanThrow errors instead of returnfalse

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

TypeDescription
textDefault. Standard text response (no structured output)
json_schemaReturns validated JSON matching the provided schema

JSON Schema Format

When using type: 'json_schema', provide:

FieldTypeDescription
type'json_schema'Required. Specifies JSON schema mode
schemaobjectRequired. JSON Schema object defining the output structure
retryCountnumberOptional. 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

MethodDescriptionResponse
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

MethodDescriptionResponse
app.log()Write a log entryboolean
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

MethodDescriptionResponse
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

MethodDescriptionResponse
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

MethodDescriptionResponse
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

MethodDescriptionNotes
session.list()List sessionsReturns <a href={typesUrl}><code>Session[]</code></a>
session.get({ path })Get sessionReturns <a href={typesUrl}><code>Session</code></a>
session.children({ path })List child sessionsReturns <a href={typesUrl}><code>Session[]</code></a>
session.create({ body })Create sessionReturns <a href={typesUrl}><code>Session</code></a>
session.delete({ path })Delete sessionReturns boolean
session.update({ path, body })Update session propertiesReturns <a href={typesUrl}><code>Session</code></a>
session.init({ path, body })Analyze app and create AGENTS.mdReturns boolean
session.abort({ path })Abort a running sessionReturns boolean
session.share({ path })Share sessionReturns <a href={typesUrl}><code>Session</code></a>
session.unshare({ path })Unshare sessionReturns <a href={typesUrl}><code>Session</code></a>
session.summarize({ path, body })Summarize sessionReturns boolean
session.messages({ path })List messages in a sessionReturns { info: <a href={typesUrl}><code>Message</code></a>, parts: <a href={typesUrl}><code>Part[]</code></a>}[]
session.message({ path })Get message detailsReturns { info: <a href={typesUrl}><code>Message</code></a>, parts: <a href={typesUrl}><code>Part[]</code></a>}
session.prompt({ path, body })Send prompt messagebody.noReply: true returns UserMessage (context only). Default returns <a href={typesUrl}><code>AssistantMessage</code></a> with AI response. Supports body.outputFormat for structured output
session.command({ path, body })Send command to sessionReturns { info: <a href={typesUrl}><code>AssistantMessage</code></a>, parts: <a href={typesUrl}><code>Part[]</code></a>}
session.shell({ path, body })Run a shell commandReturns <a href={typesUrl}><code>AssistantMessage</code></a>
session.revert({ path, body })Revert a messageReturns <a href={typesUrl}><code>Session</code></a>
session.unrevert({ path })Restore reverted messagesReturns <a href={typesUrl}><code>Session</code></a>
postSessionByIdPermissionsByPermissionId({ path, body })Respond to a permission requestReturns 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

MethodDescriptionResponse
find.text({ query })Search for text in filesArray of match objects with path, lines, line_number, absolute_offset, submatches
find.files({ query })Find files and directories by namestring[] (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

MethodDescriptionResponse
tui.appendPrompt({ body })Append text to the promptboolean
tui.openHelp()Open the help dialogboolean
tui.openSessions()Open the session selectorboolean
tui.openThemes()Open the theme selectorboolean
tui.openModels()Open the model selectorboolean
tui.submitPrompt()Submit the current promptboolean
tui.clearPrompt()Clear the promptboolean
tui.executeCommand({ body })Execute a commandboolean
tui.showToast({ body })Show toast notificationboolean

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

MethodDescriptionResponse
auth.set({ ... })Set authentication credentialsboolean

Examples

javascript
await client.auth.set({
  path: { id: "anthropic" },
  body: { type: "api", key: "your-api-key" },
})

Events

MethodDescriptionResponse
event.subscribe()Server-sent events streamServer-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)
}