Update documentation for Slack Copilot integration changes (#62066)

Co-authored-by: Vanessa <vgrl@github.com>

Author: yaraya24

content/copilot/how-tos/use-copilot-agents/cloud-agent/integrate-cloud-agent-with-slack.md

@@ -54,45 +54,53 @@ You must have write access to the default repository – or the repository speci
 
 Users can invoke {% data variables.copilot.copilot_cloud_agent %} on any repository where they have `write` access. For enterprise-owned repositories, administrators must install and configure the [Slack {% data variables.product.prodname_github_app %}](https://github.com/marketplace/slack-github?ref_product=copilot&ref_type=engagement&ref_style=text&ref_plan=enterprise) and specify which repositories the Slack app can access. For more information about configuring {% data variables.product.prodname_github_apps %}, see [AUTOTITLE](/apps/using-github-apps/installing-a-github-app-from-github-marketplace-for-your-organizations).
 
-1. In Slack, open a direct message with the {% data variables.product.prodname_github_app %} or mention the app in a thread by typing `@{% data variables.product.prodname_copilot %}`.
-1. Type your prompt, then send it. Optionally, you can specify a repository or branch using the following syntax:
+1. In Slack, open a direct message with the {% data variables.product.prodname_github_app %} or mention the app in a thread by typing `@{% data variables.product.github %}`.
+1. Type your prompt, then send it. You can describe the repository and branch in natural language as part of your request. For example:
 
-    `@{% data variables.product.github %} Add "Hello World" to the README in repo=REPO_OWNER/REPO_NAME branch=BRANCH_NAME`
+    `@{% data variables.product.github %} Add "Hello World" to the README in octo-org/octo-repo on the develop branch`
 
-    > [!NOTE] The repo parameter tells {% data variables.copilot.copilot_cloud_agent %} which repository to use for the request, and the branch parameter specifies an existing branch of the repository that should be used as the base branch for a pull request. By default, {% data variables.product.prodname_copilot_short %} uses your configured default repository and the repository’s default branch.
+    > [!NOTE] Tell {% data variables.copilot.copilot_cloud_agent %} which repository to use for the request, and, if needed, an existing branch of the repository to use as the base branch for a pull request. If you don't specify a repository, {% data variables.product.prodname_copilot_short %} uses the channel's default repository if one is set, and otherwise asks you which one to use. If you don't specify a branch, {% data variables.product.prodname_copilot_short %} creates a new branch from the repository's default branch.
 
 1. {% data variables.copilot.copilot_cloud_agent %} will initiate a {% data variables.copilot.copilot_cloud_agent_short %} session and, once the {% data variables.copilot.copilot_cloud_agent_short %} has finished, respond with a summary of the changes it plans to make and a link to the pull request it has created in the default repository.
 
-### Creating an issue with {% data variables.product.prodname_copilot_short %}
+### Creating issues with {% data variables.product.prodname_copilot_short %}
 
-You can ask {% data variables.product.prodname_copilot_short %} to draft {% data variables.product.github %} issues directly from Slack, turning conversations into actionable tasks. When you mention {% data variables.product.prodname_copilot_short %}, it uses the full thread history as context for the issue it drafts. To keep the context focused, consider starting a new thread or sending a direct message.
+You can ask {% data variables.product.prodname_copilot_short %} to create {% data variables.product.github %} issues directly from Slack, turning conversations into actionable tasks. Just describe what you need in natural language, and {% data variables.product.prodname_copilot_short %} creates the issue for you. You can create a single issue or multiple issues at once with child-parent relationships. When you mention {% data variables.product.prodname_copilot_short %}, it uses the full thread history as context for the issues it creates. To keep the context focused, consider starting a new thread or sending a direct message.
 
-1. In Slack, ask {% data variables.product.prodname_copilot_short %} to create an issue, specifying the target repository.
+1. In Slack, ask {% data variables.product.prodname_copilot_short %} to create one or more issues, specifying the target repository.
 
-   For example:
+   To create a single issue:
 
    ```text
    @{% data variables.product.github %} In octo-org/octo-repo, create a feature request to add fuzzy matching to search.
    ```
 
+   To create multiple issues at once:
+
    ```text
-   @{% data variables.product.github %} Log a bug for a 500 error in octo-org/octo-repo and assign @USER to it. This happens consistently when I try to log into the site.
+   @{% data variables.product.github %} In octo-org/octo-repo, open separate issues for adding fuzzy matching to search, paginating the results list, and caching search queries.
    ```
 
+   To create issues with child-parent relationships:
+
    ```text
-   @{% data variables.product.github %} In octo-org/octo-repo, create an issue and add relevant code snippets to improve the API response format.
+   @{% data variables.product.github %} In octo-org/octo-repo, create an epic to redesign search, with child issues for fuzzy matching, pagination, and query caching.
    ```
 
    > [!NOTE] You can only use {% data variables.product.prodname_copilot_short %} to create issues in repositories where you already have permission to create issues. This feature doesn't change your access or bypass repository permissions.
 
-1. Click **Review draft** to open the issue draft. {% data variables.product.prodname_copilot_short %} drafts an issue that includes:
+1. {% data variables.product.prodname_copilot_short %} creates the issues and replies with a link to each one. Each issue includes a title and description, and based on your prompt {% data variables.product.prodname_copilot_short %} can also add metadata such as labels, assignees, and issue type.
+
+### Setting a default repository for a channel
+
+To avoid specifying a repository in every request, you can set a default repository for a Slack channel.
 
-   * A suggested title.
-   * Details of the required changes.
+1. In the channel, type `@{% data variables.product.github %} settings` and send the message.
+1. Select the repository you want to use as the default, then save your changes.
 
-   Based on your prompt, {% data variables.product.prodname_copilot_short %} can also suggest metadata such as labels, assignees, and issue type.
+When no repository is specified in a request, {% data variables.product.prodname_copilot_short %} uses the channel's default repository.
 
-1. Review the draft, and once the issue looks good, click **Create**.
+> [!NOTE] The default repository is shared across the channel, so any change applies to everyone using {% data variables.product.prodname_copilot_short %} in that channel.
 
 
 ## Further reading