GitLab Duo Chat

DETAILS: Tier: Premium, Ultimate Offering: SaaS, self-managed Status: Beta

• Introduced as an Experiment for SaaS in GitLab 16.0.
• Changed to Beta for SaaS in GitLab 16.6.
• Introduced as a Beta for self-managed in GitLab 16.8.
• Changed from Ultimate to Premium tier in GitLab 16.9.

GitLab Duo Chat is your personal AI-powered assistant for boosting productivity. It can assist various tasks of your daily work with the AI-generated content. Here are the examples of use cases:

Feature	Use case example	Supported interfaces	Supported deployments
Ask about GitLab	I want to know how to create an issue in GitLab.	GitLab, VS Code, and Web IDE 1	GitLab.com
Ask about a specific issue	I want to summarize this issue.	GitLab, VS Code, and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated
Ask about a specific epic	I want to summarize this epic.	GitLab, VS Code, and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated
Ask about code	I want to understand how this code works.	GitLab, VS Code, and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated
Ask about CI/CD	I want to create a new CI/CD pipeline configuration.	GitLab, VS Code, and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated
Explain code in the IDE	I want to understand how this code works.	VS Code and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated
Refactor code in the IDE	I want to write a test for this code.	VS Code and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated
Write tests in the IDE	I want to refactor this code.	VS Code and Web IDE 1	GitLab.com, self-managed, and GitLab Dedicated

Footnotes:

1. GitLab Duo Chat is not available in Web IDE on self-managed

NOTE: This is a Beta feature. We're continuously extending the capabilities and reliability of the responses.

Watch a demo

What GitLab Duo Chat can help with

GitLab Duo Chat can help in a variety of areas.

Ask about GitLab

• Introduced for SaaS in GitLab 16.0.

You can ask questions about how GitLab works. Things like:

• Explain the concept of a 'fork' in a concise manner.
• Provide step-by-step instructions on how to reset a user's password.

NOTE: This feature is not currently supported in self-managed instances. See this epic for more infomation.

Ask about a specific issue

• Introduced for SaaS in GitLab 16.0.
• Introduced for self-managed in GitLab 16.8.

You can ask about a specific GitLab issue. For example:

• Generate a summary for the issue identified via this link: <link to your issue>
• When you are viewing an issue in GitLab, you can ask Generate a concise summary of the current issue.
• How can I improve the description of <link to your issue> so that readers understand the value and problems to be solved?

Ask about a specific epic

• Introduced for SaaS in GitLab 16.3.
• Introduced for self-managed in GitLab 16.8.

You can ask about a specific GitLab epic. For example:

• Generate a summary for the epic identified via this link: <link to your epic>
• Generate a concise summary of the opened epic.
• What are the unique use cases raised by commenters in <link to your epic>?

Ask about code

• Introduced for SaaS in GitLab 16.1.
• Introduced for self-managed in GitLab 16.8.

You can also ask GitLab Duo Chat to generate code:

• Write a Ruby function that prints 'Hello, World!' when called.
• Develop a JavaScript program that simulates a two-player Tic-Tac-Toe game. Provide both game logic and user interface, if applicable.

And you can ask GitLab Duo Chat to explain code:

• Provide a clear explanation of the given Ruby code: def sum(a, b) a + b end. Describe what this code does and how it works.

Alternatively, you can use the /explain command to explain the selected code in your editor.

Ask about CI/CD

• Introduced for SaaS in GitLab 16.7.
• Introduced for self-managed in GitLab 16.8.

You can ask GitLab Duo Chat to create a CI/CD configuration:

• Create a .gitlab-ci.yml configuration file for testing and building a Ruby on Rails application in a GitLab CI/CD pipeline.

Explain code in the IDE

• Introduced for SaaS in GitLab 16.7.
• Introduced for self-managed in GitLab 16.8.

NOTE: This feature is available in VS Code and the Web IDE only.

/explain is a special command to explain the selected code in your editor. You can also add additional instructions to be considered, for example: /explain the performance See Use GitLab Duo Chat in VS Code for more information.

Refactor code in the IDE

• Introduced for SaaS in GitLab 16.7.
• Introduced for self-managed in GitLab 16.8.

NOTE: This feature is available in VS Code and the Web IDE only.

/refactor is a special command to generate a refactoring suggestion for the selected code in your editor. You can include additional instructions to be considered. For example:

• Use a specific coding pattern, for example /refactor with ActiveRecord.
• Use a specific library, for example /refactor using mysql.
• Refactor to a different programming language, for example /refactor to TypeScript.

See Use GitLab Duo Chat in the VS Code for more information.

Write tests in the IDE

• Introduced for SaaS in GitLab 16.7.
• Introduced for self-managed in GitLab 16.8.

NOTE: This feature is available in VS Code and the Web IDE only.

/tests is a special command to generate a testing suggestion for the selected code in your editor. You can also add additional instructions to be considered, for example: /tests using the Boost.Test framework See Use GitLab Duo Chat in the VS Code for more information.

Ask follow up questions

You can ask follow-up questions to delve deeper into the topic or task at hand. This helps you get more detailed and precise responses tailored to your specific needs, whether it's for further clarification, elaboration, or additional assistance.

A follow-up to the question Write a Ruby function that prints 'Hello, World!' when called could be:

• Can you also explain how I can call and execute this Ruby function in a typical Ruby environment, such as the command line?

Enable GitLab Duo Chat

For SaaS users

To use this feature, at least one group you're a member of must have the experiment and beta features setting enabled.

For self-managed users

NOTE: Usage of GitLab Duo Chat is governed by the GitLab Testing Agreement. Learn about data usage when using GitLab Duo Chat.

Prerequisites:

• You are using GitLab version 16.8 or later.
• The Ultimate license is activated in your GitLab instance by using cloud Licensing.
• All of the users in your instance have the latest version of their IDE extension.
• You are an administrator.

To enable GitLab Duo Chat for your self-managed GitLab instance:

1. On the left sidebar, at the bottom, select Admin Area.
2. Select Settings > General.
3. Expand AI-powered features and select Enable Experiment and Beta AI-powered features.
4. Select Save changes.
5. To make sure GitLab Duo Chat works immediately, you must manually synchronize your subscription.

Manually synchronize your subscription

You must manually synchronize your subscription if either:

• You have just purchased a subscription for the Ultimate tier and have upgraded to GitLab 16.8.
• You already have a subscription for the Ultimate tier and have upgraded to GitLab 16.8.

Without the manual synchronization, it might take up to 24 hours to activate GitLab Duo Chat on your instance.

Use GitLab Duo Chat in the GitLab UI

1. In the lower-left corner, select the Help icon. The new left sidebar must be enabled.
2. Select GitLab Duo Chat. A drawer opens on the right side of your screen.
3. Enter your question in the chat input box and press Enter or select Send. It may take a few seconds for the interactive AI chat to produce an answer.
4. You can ask a follow-up question.
5. If you want to ask a new question unrelated to the previous conversation, you may receive better answers if you clear the context by typing /reset into the input box and selecting Send.

NOTE: Only the last 50 messages are retained in the chat history. The chat history expires 3 days after last use.

Delete all conversations

To delete all previous conversations:

1. In the text box, type /clean and select Send.

Use GitLab Duo Chat in the Web IDE

DETAILS: Tier: Ultimate Status: Experiment

• Introduced in GitLab 16.6 as an Experiment

To use GitLab Duo Chat in the Web IDE on GitLab:

1. Open the Web IDE:

   1. On the left sidebar, select Search or go to and find your project.
   2. Select a file. Then in the upper right, select Edit > Open in Web IDE.

2. Then open Chat by using one of the following methods:

   • On the left sidebar, select GitLab Duo Chat.

   • In the file that you have open in the editor, select some code.

     1. Right-click and select GitLab Duo Chat.
     2. Select Explain selected code or Generate Tests.

   • Use the keyboard shortcut: ALT+d (on Windows and Linux) or Option+d (on Mac)

3. In the message box, enter your question and press Enter or select Send.

If you have selected code in the editor, this selection is sent along with your question to the AI. This way you can ask questions about this code selection. For instance, Could you simplify this?.

NOTE: GitLab Duo Chat is not available in the Web IDE on self-managed.

Use GitLab Duo Chat in VS Code

DETAILS: Tier: Ultimate Status: Experiment

• Introduced in GitLab 16.6 as an Experiment.

To use GitLab Duo Chat in GitLab Workflow extension for VS Code:

1. Install and set up the Workflow extension for VS Code:
   1. In VS Code, download and Install the GitLab Workflow extension for VS Code.
   2. Configure the GitLab Workflow extension.
2. In VS Code, open a file. The file does not need to be a file in a Git repository.
3. Open Chat by using one of the following methods:
   • On the left sidebar, select GitLab Duo Chat.
   • In the file that you have open in the editor, select some code.
     1. Right-click and select GitLab Duo Chat.
     2. Select Explain selected code or Generate Tests.
   • Use the keyboard shortcut: ALT+d (on Windows and Linux) or Option+d (on Mac)
4. In the message box, enter your question and press Enter or select Send.

If you have selected code in the editor, this selection is sent along with your question to the AI. This way you can ask questions about this code selection. For instance, Could you simplify this?.

Perform standard task in the IDE from the context menu or by using slash commands

Get code explained, code refactored or get tests generated for code. To do so:

1. Select code in your editor in VS Code or in the Web IDE.
2. Type one the following slash commands into the chat field: /explain, /refactor or /tests. Alternatively, use the context menu to perform these tasks.

When you use one of the slash commands you can also add additional instructions to be considered, for example: /tests using the Boost.Test framework

Disable Chat in VS Code

To disable GitLab Duo Chat in VS Code:

1. Go to Settings > Extensions > GitLab Workflow (GitLab VSCode Extension).
2. Clear the Enable GitLab Duo Chat assistant checkbox.

Give feedback

Your feedback is important to us as we continually enhance your GitLab Duo Chat experience. Leaving feedback helps us customize the Chat for your needs and improve its performance for everyone.

To give feedback about a specific response, use the feedback buttons in the response message. Or, you can add a comment in the feedback issue.