---
description: Workflows now provides additional context inside step.do() callbacks and supports returning ReadableStream to handle larger step outputs.
title: Additional step context and ReadableStream support now available in Workflows step.do()
image: https://developers.cloudflare.com/changelog/post/2026-04-21-step-context-and-readable-streams/og.png?v=1206e5c283976a7c
---

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April 21, 2026

## Additional step context and ReadableStream support now available in Workflows step.do()

[Workflows](https://developers.cloudflare.com/workflows/)

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[Workflows](https://developers.cloudflare.com/workflows/) now provides additional context inside `step.do()` callbacks and supports returning `ReadableStream` to handle larger step outputs.

#### Step context properties

The `step.do()` callback receives a context object with new properties [alongside](https://developers.cloudflare.com/changelog/post/2026-03-06-step-context-available/) `attempt`:

- **`step.name`** — The name passed to `step.do()`
- **`step.count`** — How many times a step with that name has been invoked in this instance (1-indexed)
  - Useful when running the same step in a loop.
- **`config`** — The resolved step configuration, including `timeout` and `retries` with defaults applied

```ts
type ResolvedStepConfig = {
	retries: {
		limit: number;
		delay: WorkflowDelayDuration | number;
		backoff?: "constant" | "linear" | "exponential";
	};
	timeout: WorkflowTimeoutDuration | number;
};

type WorkflowStepContext = {
	step: {
		name: string;
		count: number;
	};
	attempt: number;
	config: ResolvedStepConfig;
};
```

#### ReadableStream support in `step.do()`

Steps can now return a `ReadableStream` directly. Although non-stream step outputs are [limited to 1 MiB](https://developers.cloudflare.com/workflows/reference/limits/), streamed outputs support much larger payloads.

```ts
const largePayload = await step.do("fetch-large-file", async () => {
	const object = await env.MY_BUCKET.get("large-file.bin");
	return object.body;
});
```

Note that streamed outputs are still considered part of the Workflow instance storage limit.

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