Add content on GitHub Copilot Extensions support for JetBrains and Mo…

…bile (#52697)

Co-authored-by: Dimitrios Philliou <[email protected]>

content/copilot/building-copilot-extensions/building-a-copilot-agent-for-your-copilot-extension/configuring-your-copilot-agent-to-communicate-with-the-copilot-platform.md

@@ -89,6 +89,8 @@ data: [{
 
 ### `copilot_references`
 
+> [!NOTE] Rendering references is currently unsupported for {% data variables.product.prodname_copilot_mobile_short %}. Extensions that depend on reference memory to generate responses will still work, but the references will not be displayed to the user.
+
 The `copilot_references` SSE sends the user a list of references used to generate a response. This SSE is sent through an event type and data field. See the following code for an example of a `copilot_references` SSE:
 
 ```typescript annotate

content/copilot/using-github-copilot/asking-github-copilot-questions-in-github-mobile.md

@@ -183,6 +183,10 @@ You can ask questions about a specific discussion in a repository.
 
 {% endif %}
 
+## Extending {% data variables.product.prodname_copilot_chat_short %} in {% data variables.product.prodname_mobile %}
+
+{% data reusables.copilot.copilot-extensions.extending-copilot-chat %}
+
 ## Sharing feedback about {% data variables.product.prodname_copilot_mobile %}
 
 To give feedback about a particular {% data variables.product.prodname_copilot_chat_short %} response:

content/copilot/using-github-copilot/asking-github-copilot-questions-in-your-ide.md

@@ -345,6 +345,10 @@ You can ask {% data variables.product.prodname_copilot_chat_short %} to give cod
 
 You can use special keywords to help {% data variables.product.prodname_copilot_short %} understand your prompt.
 
+### Extending {% data variables.product.prodname_copilot_chat_short %}
+
+{% data reusables.copilot.copilot-extensions.extending-copilot-chat %}
+
 ### Slash commands
 
 Use slash commands to avoid writing complex prompts for common scenarios. To use a slash command, type `/` in the chat prompt box, followed by a command. Slash commands include:

content/copilot/using-github-copilot/using-extensions-to-integrate-external-tools-with-copilot-chat.md

@@ -50,10 +50,7 @@ You can interact with your custom-built or installed extension in a {% data vari
 
 ## Using {% data variables.product.prodname_copilot_extensions %}
 
-1. To start using a {% data variables.product.prodname_copilot_extension_short %}, open any of the following {% data variables.product.prodname_copilot_chat_short %} interfaces:
-    * {% data variables.product.prodname_copilot_chat_short %} in {% data variables.product.prodname_vscode %}. See "[AUTOTITLE](/copilot/github-copilot-chat/copilot-chat-in-ides/using-github-copilot-chat-in-your-ide?tool=vscode#asking-your-first-question)."
-    * {% data variables.product.prodname_copilot_chat_short %} in {% data variables.product.prodname_vs %}. See "[AUTOTITLE](/copilot/github-copilot-chat/copilot-chat-in-ides/using-github-copilot-chat-in-your-ide?tool=visualstudio#asking-your-first-question-1)."
-    * {% data variables.product.prodname_copilot_chat_dotcom_short %}. See "[AUTOTITLE](/copilot/github-copilot-chat/copilot-chat-in-github/using-github-copilot-chat-in-githubcom#asking-a-general-question-about-software-development)."
+1. To start using a {% data variables.product.prodname_copilot_extension_short %}, open a supported {% data variables.product.prodname_copilot_chat_short %} interface. See "[Supported clients and IDEs](#supported-clients-and-ides)."
 1. To see a list of all {% data variables.product.prodname_copilot_extensions_short %} available in your {% data variables.product.prodname_copilot_chat_short %} conversation, in the {% data variables.product.prodname_copilot_chat_short %} text box, type `@`.
 
     > [!NOTE] If you are using {% data variables.product.prodname_copilot_chat_short %} in an IDE, and you or your organization owner install a {% data variables.product.prodname_copilot_extension_short %} while your IDE is open, you need to restart your IDE to begin using the {% data variables.product.prodname_copilot_extension_short %}.

data/reusables/copilot/copilot-extensions/extending-copilot-chat.md

@@ -1,5 +1,5 @@
 {% data reusables.copilot.copilot-extensions.beta-note %}
 
-{% data variables.product.prodname_copilot_extensions %} integrate the power of external tools into {% data variables.product.prodname_copilot_chat_short %}, helping you reduce context switching and receive responses with domain-specific context. You can install {% data variables.product.prodname_copilot_extensions %} from the {% data variables.product.prodname_marketplace %}, then type `@` in a chat window to see a list of your available extensions. To use an extension, select the extension from the list or type the full slug name, then type your prompt.
+{% data variables.product.prodname_copilot_extensions %} integrate the power of external tools into {% data variables.product.prodname_copilot_chat_short %}, helping you reduce context switching and receive responses with domain-specific context. You can install {% data variables.product.prodname_copilot_extensions_short %} from the {% data variables.product.prodname_marketplace %} or build private ones within your organization, then type `@` in a chat window to see a list of your available extensions. To use an extension, select the extension from the list or type the full slug name, then type your prompt.
 
 To learn more, see "[AUTOTITLE](/copilot/using-github-copilot/using-extensions-to-integrate-external-tools-with-copilot-chat)."

data/reusables/copilot/copilot-extensions/supported-clients-and-ides-table.md

@@ -3,8 +3,8 @@
 | {% data variables.product.prodname_vscode %}                 | {% octicon "check" aria-label="Supported" %}       |
 | {% data variables.product.prodname_vs %}                     | {% octicon "check" aria-label="Supported" %}       |
 | {% data variables.product.prodname_dotcom_the_website %}     | {% octicon "check" aria-label="Supported" %}       |
-| {% data variables.product.prodname_mobile %}                 | {% octicon "x" aria-label="Unsupported" %}         |
-| JetBrains IDEs                                               | {% octicon "x" aria-label="Unsupported" %}         |
+| {% data variables.product.prodname_mobile %}                 | {% octicon "check" aria-label="Supported" %}       |
+| JetBrains IDEs                                               | {% octicon "check" aria-label="Supported" %}       |
 | Vim/Neovim                         | {% octicon "x" aria-label="Unsupported" %}        |
 | {% data variables.product.prodname_copilot_cli_short %} | {% octicon "x" aria-label="Unsupported" %}        |
 | Xcode                              | {% octicon "x" aria-label="Unsupported" %}        |