Workflow class

import {
  createWorkflow,
  type Workflow,
  type WorkflowConfig,
  type WorkflowRunOptions,
  type WorkflowRunResult,
} from "@ai_kit/core";

`WorkflowConfig`

Property	Type	Default	Description
`id`	`string`	required	Unique workflow identifier.
`description`	`string`	`undefined`	Optional DX description.
`inputSchema`	`SchemaLike<Input>`	`undefined`	Input validation.
`outputSchema`	`SchemaLike<Output>`	`undefined`	Output validation (applied after `finalize`).
`metadata`	`Meta`	`undefined`	Initial metadata shared by steps.
`finalize`	`(value: unknown) => Output`	identity	Transform the final value before validation.
`telemetry`	`boolean \| WorkflowTelemetryOverrides`	`undefined`	Enable and configure telemetry (Langfuse/OTEL).
`ctx`	`WorkflowCtxInit<Ctx>`	`undefined`	Initial shared context (read-only inside handlers).

Creation

const workflow = createWorkflow<Input, Output>({
  id: "my-workflow",
  inputSchema,
  outputSchema,
  metadata: { source: "app" },
  telemetry: { recordInputs: true },
})
  .then(stepA)
  .human(reviewStep)
  .while(loopStep)
  .conditions(conditionStep)
  .then({ low: lowStep, high: highStep })
  .commit();

Builder (`WorkflowBuilder`)

.then(step) – append an automatic step (createStep, createMapStep, …).
.human(config | step) – add a human step (createHuman).
.while(config | step) – add a controlled loop (createWhileStep).
.conditions(step) – declare a condition step; chain .then(...) with an object { branchId: step } or a list of steps.
.commit() – validate the structure, ensure no cycles, and return an immutable Workflow.

Each step needs a unique id. Declare branches before calling commit().

`Workflow` methods

`createRun(runId?: string)`

Instantiates a WorkflowRun. A unique runId is generated via createRunId() if omitted.

`run(options)`

run(options: WorkflowRunOptions<Input, Meta, Ctx>): Promise<WorkflowRunResult<Output, Meta, Ctx>>;

Executes the workflow in one shot (equivalent to createRun().start(options)).

`validateInput(value)`

Applies inputSchema; throws WorkflowSchemaError on validation failures.

`validateOutput(value)`

Runs finalize then outputSchema. Handy for step-level tests.

`getInitialMetadata()`

Returns a deep copy of the initial metadata (may be undefined).

`getTelemetryConfig()`

Exposes the current telemetry configuration (boolean or overrides object).

`getBaseContext()`

Returns the base context (ctx) used for subsequent runs.

`withTelemetry(option = true)`

Enable/disable telemetry by mutating the workflow and return this. Use withTelemetry(workflow, option) for a functional approach.

`inspect()`

Provides the workflow graph (nodes, edges, entryId)—useful for visualisation and debugging.

Run options (`WorkflowRunOptions`)

Option	Type	Description
`inputData`	`Input`	Workflow input.
`metadata`	`Meta`	Metadata merged with the workflow defaults.
`ctx`	`Partial<Ctx> \| Ctx`	Shared context injected for this run.
`signal`	`AbortSignal`	Cancel execution.
`telemetry`	`WorkflowTelemetryOption`	Per-run overrides (trace name, metadata, userId, `record*` flags).

The result (WorkflowRunResult) includes:

status ("success" \| "failed" \| "cancelled" \| "waiting_human");
result (final output);
error (if any);
steps (snapshots per step, occurrences, branch taken);
metadata, ctx (final states);
startedAt, finishedAt;
pendingHuman when the run is waiting for a human step.

For streaming, resume, and observability features, see WorkflowRun.

Core classes

​WorkflowConfig

​Creation

​Builder (WorkflowBuilder)

​Workflow methods

​createRun(runId?: string)

​run(options)

​validateInput(value)

​validateOutput(value)

​getInitialMetadata()

​getTelemetryConfig()

​getBaseContext()

​withTelemetry(option = true)

​inspect()

​Run options (WorkflowRunOptions)