diff --git a/doc/editor_extensions/gitlab_cli/_index.md b/doc/editor_extensions/gitlab_cli/_index.md
index fcda02ac1e00b83b82b53f5adc083e08df6b3679..4ceb39aea54c5c271e1d61e9683c25c76a26456b 100644
--- a/doc/editor_extensions/gitlab_cli/_index.md
+++ b/doc/editor_extensions/gitlab_cli/_index.md
@@ -95,12 +95,16 @@ glab mr merge
 
 - Changed to require GitLab Duo add-on in GitLab 17.6 and later.
 - Changed to include Premium in GitLab 18.0.
+- Authentication with third-party AI developer CLI tools [added](<link>) in GitLab 18.4.
 
 {{< /history >}}
 
-The GitLab CLI includes features powered by [GitLab Duo](../../user/gitlab_duo/_index.md). These include:
+The GitLab CLI includes features powered by [GitLab Duo](../../user/gitlab_duo/_index.md):
 
 - [`glab duo ask`](https://gitlab.com/gitlab-org/cli/-/blob/main/docs/source/duo/ask.md)
+- `glab duo <third-party AI developer CLI tool>`
+
+### `glab duo ask`
 
 To ask questions about `git` commands while you work, type:
 
@@ -109,6 +113,18 @@ To ask questions about `git` commands while you work, type:
 The `glab duo ask` command can help you remember a `git` command you forgot,
 or provide suggestions on how to run `git` commands to perform other tasks.
 
+### `glab duo <third-party AI developer CLI tool>`
+
+To use GitLab as an authentication provider to access third-party AI developer CLI tools, type:
+
+```plaintext
+glab duo <third-party AI developer CLI tool>
+```
+
+Third-party AI developer CLI tools integrate AI assistance directly into your development workflow.
+
+For more information, see [use the GitLab CLI with third-party AI CLI tools](../../user/duo_agent_platform/duo_cli_third_party.md).
+
 ## Install the CLI
 
 Installation instructions are available in the `glab`
diff --git a/doc/user/duo_agent_platform/agent_assistant.md b/doc/user/duo_agent_platform/agent_assistant.md
index 4e458c297180f7eab116e443fc3d53754f35c0bb..cccfb2d70b098e878720cbadc28d23d0b4add069 100644
--- a/doc/user/duo_agent_platform/agent_assistant.md
+++ b/doc/user/duo_agent_platform/agent_assistant.md
@@ -576,3 +576,7 @@ Prerequisites:
    is displayed. You can select **here** to see the pipeline in progress.
 1. After the CLI agent has completed the task, you see a confirmation, and either a
    ready-to-merge change or an inline comment.
+
+## Related topics
+
+- [Use the GitLab CLI with third-party AI CLI tools](duo_cli_third_party.md)
diff --git a/doc/user/duo_agent_platform/duo_cli_third_party.md b/doc/user/duo_agent_platform/duo_cli_third_party.md
new file mode 100644
index 0000000000000000000000000000000000000000..7d691ab091e88233581ddab17524be51f96e1303
--- /dev/null
+++ b/doc/user/duo_agent_platform/duo_cli_third_party.md
@@ -0,0 +1,69 @@
+---
+stage: AI-powered
+group: Agent Foundations
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
+title: Use the GitLab CLI with third-party AI CLI tools
+---
+
+{{< details >}}
+
+- Tier: Ultimate
+- Add-on: GitLab Duo Enterprise, GitLab Duo with Amazon Q
+- Offering: GitLab.com, GitLab Self-Managed, GitLab Dedicated
+- Status: Experiment
+- Available on [GitLab Duo with self-hosted models](../../administration/gitlab_duo_self_hosted/_index.md): No
+
+{{< /details >}}
+
+{{< history >}}
+
+- [Introduced](<link>) in GitLab 18.4 [with a flag](../../administration/feature_flags/_index.md) named `agent_platform_claude_code`. Disabled by default.
+
+{{< /history >}}
+
+Third-party AI developer command-line interface (CLI) tools integrate
+AI assistance directly into your development workflow.
+These tools help AI understand your codebase context and execute tasks
+without you having to switch between different interfaces.
+
+You can use GitLab as an authentication provider to access
+these tools directly through the GitLab.com AI gateway.
+This method is an alternative to creating a
+[CLI agent](agent_assistant.md) for a third-party integration.
+
+[Anthropic Claude Code](https://docs.anthropic.com/en/docs/claude-code/overview) has been tested
+and is available as a third-party CLI tool.
+
+## Use third-party AI developer CLI tools
+
+Prerequisites:
+
+- Install the third-party tool on your local machine
+  (for example, [Anthropic Claude Code](https://docs.anthropic.com/en/docs/claude-code/setup)).
+- [Create a personal access token](../profile/personal_access_tokens.md#create-a-personal-access-token)
+  with the following scopes:
+  - `api`
+  - `ai_features`
+
+To use third-party CLI tools:
+
+1. [Authenticate with GitLab](../../editor_extensions/gitlab_cli/_index.md#authenticate-with-gitlab):
+
+   ```shell
+   glab auth login
+   ```
+
+   Enter your personal access token when prompted.
+
+1. Start the third-party CLI tool:
+
+   ```shell
+   glab duo <third-party-tool>
+   ```
+
+   For example, to start Anthropic Claude Code, run `glab duo claude`.
+
+## Related topics
+
+- [GitLab Duo for the CLI](../../editor_extensions/gitlab_cli/_index.md#gitlab-duo-for-the-cli)
+- [AI gateway](../../administration/gitlab_duo/gateway.md)