Copilot CLI: Improvements for ACP documentation (#59507)

Author: hubwriter

content/copilot/concepts/agents/about-copilot-cli.md

@@ -9,7 +9,7 @@ versions:
 topics:
   - Copilot
 contentType: concepts
-category: 
+category:
   - Learn about Copilot
 ---
 
@@ -297,6 +297,12 @@ You can change the model used by {% data variables.copilot.copilot_cli %} by usi
 
 Each time you submit a prompt to {% data variables.product.prodname_copilot_short %} in {% data variables.copilot.copilot_cli_short %}'s interactive mode, and each time you use {% data variables.copilot.copilot_cli_short %} in programmatic mode, your monthly quota of {% data variables.product.prodname_copilot_short %} premium requests is reduced by one, multiplied by the multiplier shown in parentheses in the model list. For example, `Claude Sonnet 4.5 (1x)` indicates that with this model each time you submit a prompt your quota of premium requests is reduced by one. For information about premium requests, see [AUTOTITLE](/copilot/concepts/billing/copilot-requests).
 
+## Use {% data variables.copilot.copilot_cli_short %} via ACP
+
+ACP (the Agent Client Protocol) is an open standard for interacting with AI agents. It allows you to use {% data variables.copilot.copilot_cli_short %} as an agent in any third-party tools, IDEs, or automation systems that support this protocol.
+
+For more information, see [AUTOTITLE](/copilot/reference/acp-server).
+
 {% data reusables.cli.feedback %}
 
 ## Further reading

content/copilot/how-tos/copilot-cli/use-copilot-cli.md

@@ -325,3 +325,4 @@ For additional information use one of the following commands in your terminal:
 
 * [AUTOTITLE](/copilot/how-tos/copilot-cli/cli-best-practices)
 * [AUTOTITLE](/copilot/reference/cli-command-reference)
+* [AUTOTITLE](/copilot/reference/acp-server)

content/copilot/reference/acp-server.md

@@ -18,6 +18,13 @@ contentType: reference
 
 The Agent Client Protocol (ACP) is a protocol that standardizes communication between clients (such as code editors and IDEs) and coding agents (such as {% data variables.copilot.copilot_cli_short %}). For more details about this protocol, see the [official introduction](https://agentclientprotocol.com/get-started/introduction).
 
+## Use cases
+
+* **IDE integrations:** Build {% data variables.product.prodname_copilot_short %} support into any editor or development environment.
+* **CI/CD pipelines:** Orchestrate agentic coding tasks in automated workflows.
+* **Custom frontends:** Create specialized interfaces for specific developer workflows.
+* **Multi-agent systems:** Coordinate {% data variables.product.prodname_copilot_short %} with other AI agents using a standard protocol.
+
 ## Starting the ACP server
 
 {% data variables.copilot.copilot_cli %} can be started as an ACP server using the `--acp` flag. The server supports two modes, `stdio` and `TCP`.