Agents need disposable worlds.
Cloudflare temporary Workers accounts are a small feature with a big product lesson: wrangler deploy --temporary gives an agent or developer a live Worker for 60 minutes, then the account can be claimed or expire.
That is the missing loop for coding agents.
Edit a repo.
Deploy somewhere isolated.
Curl the output.
Run the product path.
Collect evidence.
Tear it down.
A diff is only half the artifact. The other half is a short-lived environment where the change can prove it works without asking a human to create accounts, copy tokens, or babysit cleanup.
The useful agent stack will treat preview environments, cost ceilings, expiry, logs, and network policy as first-class controls.
Code generation got the attention. Disposable execution is where generated code becomes reviewable work.