Fast-follow CCA for Jira integration, add sign in again troubleshooting (#60179)

Author: vgrl

content/copilot/how-tos/use-copilot-agents/coding-agent/integrate-coding-agent-with-jira.md

@@ -26,6 +26,9 @@ The {% data variables.product.prodname_copilot %} integration in Jira allows you
     * **Beta AI features** must be turned on. See [Control access to beta AI features](https://support.atlassian.com/organization-administration/docs/control-access-to-beta-ai-features/) in the Atlassian documentation.<!-- markdownlint-disable-line GHD046 -->
 * Installation and authentication must be completed for both Jira and {% data variables.product.github %}.
 
+> [!NOTE]
+> If your Jira site is on release tracks, you should contact Atlassian Support and ask for agents to be enabled in Jira before proceeding with the installation. For more information, see [What are release tracks?](https://support.atlassian.com/organization-administration/docs/what-are-release-tracks/) in the Atlassian documentation.
+
 ## Installation
 
 To install the {% data variables.product.prodname_copilot %} for Jira app and authorize it for your {% data variables.product.github %} organization or enterprise account, you need:
@@ -85,6 +88,8 @@ You can trigger {% data variables.copilot.copilot_coding_agent %} in three ways:
 * **Mention** `@{% data variables.product.prodname_copilot %}` in a comment on a work item.
 * **Add {% data variables.product.prodname_copilot_short %} to a workflow transition** so it is triggered automatically when a work item moves to a specific status. See [Collaborate on work items with AI agents](https://support.atlassian.com/jira-software-cloud/docs/collaborate-on-work-items-with-ai-agents/#Add-an-agent-to-workflow-transitions) for setup instructions.
 
+To change the model used by {% data variables.copilot.copilot_coding_agent %} for a specific task, include the model name in your instructions to {% data variables.product.prodname_copilot_short %}. For example, you can say `@{% data variables.product.prodname_copilot %} use Claude Sonnet 4.5 to create a new API endpoint for user authentication in octo-org/octorepo`. If you do not specify a model, {% data variables.copilot.copilot_coding_agent %} will use the default model for coding tasks, see [AUTOTITLE](/copilot/how-tos/use-copilot-agents/coding-agent/changing-the-ai-model).
+
 > [!NOTE]
 > When you assign {% data variables.product.prodname_copilot_short %} to a Jira work item, the context the agent captures from Jira will be added to the pull request and **visible to everyone** if the repository is public.
 
@@ -130,9 +135,13 @@ In Jira, check your Atlassian Administration settings for your organization are
 
 Check that you have connected your personal account on {% data variables.product.github %} to the {% data variables.product.prodname_copilot %} for Jira app.
 
-1. In Jira, go to the personal settings page for your user account.
+1. In Jira, go to the settings page for your personal account.
 1. Under your general settings, select the **{% data variables.product.prodname_copilot %} for Jira** app.
-1. If you are not already signed in with {% data variables.product.github %}, follow the prompts to authorize the application.
+1. If you are not already signed in with {% data variables.product.github %}, follow the prompts to sign in and authorize the application.
+
+### When chatting with {% data variables.product.prodname_copilot %}, you are prompted to sign in
+
+To sign in to {% data variables.product.prodname_copilot %} for Jira app, follow the steps above in [You can see the {% data variables.copilot.copilot_coding_agent %} but it is not possible to assign it to a Jira work item](#you-can-see-the-copilot-coding-agent-but-it-is-not-possible-to-assign-it-to-a-jira-work-item)
 
 ### {% data variables.product.prodname_copilot %} is not responding
 
@@ -144,4 +153,5 @@ Check that you have connected your personal account on {% data variables.product
 
 * [AUTOTITLE](/copilot/concepts/coding-agent/coding-agent)
 * [AUTOTITLE](/copilot/concepts/coding-agent/enable-coding-agent)
+* [AUTOTITLE](/copilot/how-tos/use-copilot-agents/coding-agent/extend-coding-agent-with-mcp#example-atlassian)
 * [Collaborate on work items with AI agents](https://support.atlassian.com/jira-software-cloud/docs/collaborate-on-work-items-with-ai-agents/) in the Atlassian documentation