StepDefinition

Durable step definition created with `step()`.

SDK v2026.4.0

Kind: interface

Signature

Example

export interface StepDefinition

name (string): Human-readable step name used in checkpoints and workflow state.
inputSchema (StepSchema): Input validator for the step body.
outputSchema (StepSchema): Output validator for the step body.
fn (unknown): Pure step body that may only cross trust boundaries through kernel.*.

RuntimeSessionError

Typed error for invalid or expired runtime sessions.

StepSchema

Public schema-like surface accepted by the SDK step builder.