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

# Single Prompt

> Configure an agent that follows one set of instructions for the whole call.

Single Prompt agents follow one flat set of instructions for the entire call, instead of moving between the nodes of a Pathway.

## When to use Single Prompt

Single Prompt works well for open-ended or straightforward conversations that don't need a fixed step order or branching logic. For calls that need strict structure, branching, or escalation paths, use [Pathways](/build-voice-agents/pathways) instead.

## Choose a script type

<Tabs>
  <Tab title="Outbound Single Stage">
    Use this type for calls your agent places to customers, such as reminders, confirmations, or outreach. Select **Outbound Single Stage** as the script type when creating your agent.
  </Tab>

  <Tab title="Inbound Single Stage">
    Use this type for calls customers place to you, such as support or booking requests. Select **Inbound Single Stage** as the script type when creating your agent.
  </Tab>
</Tabs>

## Write your prompt

The agent's instructions live in a single prompt field. Write it as you would brief a live phone agent: the goal of the call, how to greet the caller, what to ask or say, and how to handle common situations.

You can reference [variables](/build-voice-agents/variables) in your prompt using `{{name}}`, and branch the wording with conditionals:

```
{{#if customer_name}}
Hi {{customer_name}}, this is a call from AgentCallback.
{{else}}
Hi, this is a call from AgentCallback.
{{/if}}
```

See [Variables](/build-voice-agents/variables) for the full syntax and available fields.

## Save and test

Save the agent, then open its **Tests** tab to run the automatic initial test — see [Test your agent](/platform/quickstart#test-your-agent) for the walkthrough.

## Next step

[Variables](/build-voice-agents/variables) to give your agent the data it needs before a call starts.