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Step

The Step class defines individual units of work within a workflow, encapsulating execution logic, data validation, and input/output handling.

Usage​

const processOrder = new LegacyStep({
  id: "processOrder",
  inputSchema: z.object({
    orderId: z.string(),
    userId: z.string(),
  }),
  outputSchema: z.object({
    status: z.string(),
    orderId: z.string(),
  }),
  execute: async ({ context, runId }) => {
    return {
      status: "processed",
      orderId: context.orderId,
    };
  },
});

Constructor Parameters​

id:

string
Unique identifier for the step

inputSchema:

z.ZodSchema
Zod schema to validate input data before execution

outputSchema:

z.ZodSchema
Zod schema to validate step output data

payload:

Record<string, any>
Static data to be merged with variables

execute:

(params: ExecuteParams) => Promise<any>
Async function containing step logic

ExecuteParams​

context:

StepContext
Access to workflow context and step results

runId:

string
Unique identifier for current workflow run

suspend:

() => Promise<void>
Function to suspend step execution

mastra:

Mastra
Access to Mastra instance

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