All Implemented Interfaces:

dev.case.api.core.Params
```
public final class ChatRespondParams
 implements Params
                    
```
Streams a single assistant turn as normalized SSE events with stable turn, message, and part IDs. Emits events: turn.started, turn.status, message.created, message.part.updated, message.completed, session.usage, turn.completed.
When to use this endpoint: Recommended for building custom chat UIs that need real-time streaming progress. This is the primary streaming endpoint for new integrations.
Alternatives:
- POST /chat/:id/message — synchronous, returns complete response as JSON (best for server-to-server)

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public final class`	`ChatRespondParams.Builder`	A builder for ChatRespondParams.
`public final class`	`ChatRespondParams.Body`	Message payload following the AI SDK UIMessage format. The body is passed through 1:1 to the underlying OpenCode session. Currently only text parts are supported.
`public final class`	`ChatRespondParams.Part`

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`final Optional<String>`	`id()`
`final Optional<List<ChatRespondParams.Part>>`	`parts()`	Message content parts.
`final JsonField<List<ChatRespondParams.Part>>`	`_parts()`	Returns the raw JSON value of parts.
`final Map<String, JsonValue>`	`_additionalBodyProperties()`
`final Headers`	`_additionalHeaders()`	Additional headers to send with the request.
`final QueryParams`	`_additionalQueryParams()`	Additional query param to send with the request.
`final ChatRespondParams.Builder`	`toBuilder()`
`final ChatRespondParams.Body`	`_body()`
`final String`	`_pathParam(Integer index)`
`Headers`	`_headers()`	The full set of headers in the parameters, including both fixed and additional headers.
`QueryParams`	`_queryParams()`	The full set of query params in the parameters, including both fixed and additional query params.
`Boolean`	`equals(Object other)`
`Integer`	`hashCode()`
`String`	`toString()`
`final static ChatRespondParams`	`none()`
`final static ChatRespondParams.Builder`	`builder()`	Returns a mutable builder for constructing an instance of ChatRespondParams.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
- Method Detail
  - id
```
 final Optional<String> id()
```
  - parts
```
 final Optional<List<ChatRespondParams.Part>> parts()
```
    Message content parts. Currently only "text" type is supported. Additional types (e.g. file, image) may be added in future versions.
  - _parts
```
 final JsonField<List<ChatRespondParams.Part>> _parts()
```
    Returns the raw JSON value of parts.
    Unlike parts, this method doesn't throw if the JSON field has an unexpected type.
  - _additionalBodyProperties
```
 final Map<String, JsonValue> _additionalBodyProperties()
```
  - _additionalHeaders
```
 final Headers _additionalHeaders()
```
    Additional headers to send with the request.
  - _additionalQueryParams
```
 final QueryParams _additionalQueryParams()
```
    Additional query param to send with the request.
  - toBuilder
```
 final ChatRespondParams.Builder toBuilder()
```
  - _body
```
 final ChatRespondParams.Body _body()
```
  - _pathParam
```
 final String _pathParam(Integer index)
```
  - _headers
```
 Headers _headers()
```
    The full set of headers in the parameters, including both fixed and additional headers.
  - _queryParams
```
 QueryParams _queryParams()
```
    The full set of query params in the parameters, including both fixed and additional query params.
  - equals
```
 Boolean equals(Object other)
```
  - hashCode
```
 Integer hashCode()
```
  - toString
```
 String toString()
```
  - none
```
 final static ChatRespondParams none()
```
  - builder
```
 final static ChatRespondParams.Builder builder()
```
    Returns a mutable builder for constructing an instance of ChatRespondParams.

Class ChatRespondParams

Nested Class Summary

Field Summary

Constructor Summary

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Method Detail

id

parts

_parts

_additionalBodyProperties

_additionalHeaders

_additionalQueryParams

toBuilder

_body

_pathParam

_headers

_queryParams

equals

hashCode

toString

none

builder