cloudflare-workflows

Durable execution on Cloudflare Workers involves building multi-step applications that persist state and survive failures. The Workflows framework provides automatic retries, configurable backoff, and state persistence for critical long-running tasks.

To wait for an external event in a Cloudflare Workflow, use the `step.waitForEvent` function. This event-driven mechanism enables human-in-the-loop scenarios and webhook processing by pausing execution until an external signal is received.

Handle errors in Cloudflare Workflows by implementing automatic retries with configurable backoff and timeouts. For unrecoverable issues, throw a `NonRetryableError` to halt retries and manage I/O context failures robustly.

Yes, you can test Cloudflare Workflows using Vitest. The framework supports Vitest integration to verify durable execution logic, retry patterns, and event-driven workflows before deploying your application to production.

Implement a human-in-the-loop approval process in a Cloudflare Worker by using `step.waitForEvent`. This pauses the durable execution flow to wait for external approval signals before resuming subsequent steps like database updates.