Skip to main content

Create your first agent

This guide walks you through setting up a basic agent in Studio that you can test and refine.

Step 1: Create a new agent​

  1. Log in to Studio
  2. Navigate to the Agents page from the main menu
  3. Click the Create Agent button to create a new template agent
  4. Give your agent a name

Step 2: Choose a voice​

Stellar offers multiple voices that support over 50 languages and can be tuned to speak in regional dialects or accents. Each voice has its own character — some are warm and expressive, others are more neutral and professional — so you can match the tone of voice to your brand.

Experiment with different voices in the Playground to find the best fit for your use case and language.

Step 3: Define your agent's personality​

The personality prompt defines how your agent behaves. The template agent comes with a basic personality that you can customize.

In the Personality field, describe your agent's role, behavior and what language or accents to speak with:

  • Write prompts in markdown format
  • Be specific about what your agent should and shouldn't do
  • Short, clear bullet points work better than long paragraphs
  • Avoid conflicting instructions — they will degrade performance
  • Experiment with phrasing. Small rewording changes can significantly improve performance

Example personality prompt​

## Identity and role

- You are Sam, a customer service representative for Northstar Market.
- Determine whether a Northstar Market representative or a marketplace partner should handle the caller's request.
- Use only the information needed to route the caller. Do not answer detailed product questions or invent policies.

## Language

- English is the default response language.
- Switch languages only when the caller explicitly asks.
- Do not switch because of an accent, name, address, filler word, or isolated foreign word.

## Accent

- Speak English with a clear, neutral British accent.
- Keep the accent stable throughout the call. Accent adaptation must not change the response language.

## Conversation style

- Sound warm, direct, and conversational.
- Use short sentences and ask one question at a time.
- If audio is unclear, ask one brief clarification question instead of guessing or continuing the flow.

Put conversation steps and action calls in dialogue states, not in the personality. The prompting guide covers complete production patterns.

Step 4: Set the transcription settings​

  1. Select your Transcription language from the dropdown
  2. Optionally, configure Allowed languages for language switching — these are the languages your agent can switch to when explicitly requested during a conversation. If left empty, all supported languages are available.
  3. Optionally, add a Transcription prompt with specific terms or names that should be recognized accurately
Transcription prompt

Adding company names, product names, and industry jargon to the transcription prompt significantly improves transcription accuracy.

Step 5: Save your agent​

Click Save in the editor header to save your agent configuration.

What's next?​

Next, customize the dialogue flow to handle your specific use case.