Introducing Worker Previews: Isolated preview environments for every change your agent makes

Nothing is worse than testing out a change that works in staging, only to see it behave differently in production. That’s why we wanted to give you an environment that’s as close to production as possible — so you can battle-test your changes and make sure they behave exactly as you expect them to.

Agents are helping us push more lines of code than ever before, and larger changes mean more ground needs to be tested ahead of release. Ideally, that testing is done in a way that doesn’t slow agents down, but gives them the tools to take on more of the development lifecycle.

That’s why today we’re launching Worker Previews. Each Git branch gets a production-like place to run, with its own code, configuration, URL, observability, and state.

So now, for every change in your codebase, you can: