> ## Documentation Index
> Fetch the complete documentation index at: https://docs.utter.technology/llms.txt
> Use this file to discover all available pages before exploring further.

# Iterate on an endpoint

> Refine your prompt and re-utter. Every change is a fresh generation that has to pass the gates again.

Your first sentence rarely captures everything. The studio makes refining fast: after a build, an **iterate bar** lets you edit your prompt and re-utter without starting from scratch.

## The iterate bar

Below the live result, the iterate bar is a form prefilled with your original prompt. Edit the sentence, add detail about the input or output you want, and submit. It reopens [/create](https://app.utter.technology/create) with your prompt already filled in, so you can refine and re-utter in one move.

<Tip>
  Iterate to sharpen the contract, not to fix a broken build. If a build fails the gates, the studio already self-heals with a bounded regenerate and repair loop. Use the iterate bar when the endpoint works but you want it to do something different.
</Tip>

## A change is a fresh generation

Re-uttering is not an in-place patch. A changed prompt is a **fresh generation**: Claude writes a new five-file bundle, and that bundle has to pass the same four gates as any first build before it can go live:

<Steps>
  <Step title="Generate">
    Claude writes a new handler, schema, agent card, and test cases from the edited prompt.
  </Step>

  <Step title="Pass the gates again">
    The new bundle runs the shape check, the [static security scan](/concepts/egress-and-static-gate), the build spec, and the live 402-then-200 serve check. A bundle that cannot pass is rejected and nothing is published.
  </Step>

  <Step title="Redeploy and relist">
    A bundle that passes deploys, verifies, mints, and publishes, exactly like a first build.
  </Step>
</Steps>

<Note>
  Because every re-utter is a full generation that clears the gates, you never ship a change that has not been proven to serve a real paid call.
</Note>