Type Alias WrapModelCallHook<TSchema, TContext>

WrapModelCallHook: (
request: ModelRequest<NormalizedSchemaInput<TSchema>, TContext>,
handler: WrapModelCallHandler<TSchema, TContext>,
) => PromiseOrValue<BaseMessage>

Wrapper function type for the wrapModelCall hook. Allows middleware to intercept and modify model execution. This enables you to:

Modify the request before calling the model (e.g., change system prompt, add/remove tools)
Handle errors and retry with different parameters
Post-process the response
Implement custom caching, logging, or other cross-cutting concerns

Type Parameters

TSchema extends BaseMessage | undefined = undefined
TContext = unknown

Type Declaration

- (
  request: ModelRequest<NormalizedSchemaInput<TSchema>, TContext>,
  handler: WrapModelCallHandler<TSchema, TContext>,
  ): PromiseOrValue<BaseMessage>
- Parameters
  - request: ModelRequest<NormalizedSchemaInput<TSchema>, TContext>
    The model request containing all parameters needed for the model call
  - handler: WrapModelCallHandler<TSchema, TContext>
    The function that invokes the model. Call this with a ModelRequest to get the response
  Returns PromiseOrValue<BaseMessage>
  The AI message response from the model (or a modified version)