Create stub of repository page

Add the new page to the repository so I can begin to scaffold content
atop it.

doc/user/clusters/agent/index.md

@@ -161,23 +161,9 @@ gitops:
 ```
 
 GitLab [versions 13.7 and later](https://gitlab.com/gitlab-org/gitlab/-/issues/259669) also
-supports manifest projects containing multiple directories (or subdirectories)
-of YAML files. To use multiple YAML files, specify a `paths` attribute:
-
-```yaml
-gitops:
-  manifest_projects:
-  - id: "path-to/your-manifest-project-number1"
-  paths:
-      # Read all .yaml files from team1/app1 directory.
-      # See https://github.com/bmatcuk/doublestar#about and
-      # https://pkg.go.dev/github.com/bmatcuk/doublestar/v2#Match for globbing rules.
-    - glob: '/team1/app1/*.yaml'
-      # Read all .yaml files from team2/apps and all subdirectories
-    - glob: '/team2/apps/**/*.yaml'
-      # If 'paths' is not specified or is an empty list, the configuration below is used
-    - glob: '/**/*.{yaml,yml,json}'
-```
+supports manifest projects containing
+multiple directories (or subdirectories) of YAML files. For more information see our
+documentation on the [Kubernetes Agent configuration respository](repository.md).
 
 ### Create an Agent record in GitLab
 

doc/user/clusters/agent/repository.md

+---
+stage: Configure
+group: Configure
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
+# Kubernetes Agent configuration repository **(PREMIUM ONLY)**
+
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/259669) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.7.
+> - It's disabled on GitLab.com. Rolling this feature out to GitLab.com is [planned](https://gitlab.com/groups/gitlab-org/-/epics/3834).
+
+CAUTION: **Warning:**
+This feature might not be available to you. Check the **version history** note above for details.
+
+The [GitLab Kubernetes Agent integration](index.md) supports hosting your configuration for
+multiple GitLab Kubernetes Agents in a single repository. These agents can be running
+in the same cluster or in multiple clusters, and potentially with more than one Agent per cluster.
+
+The Agent bootstraps with the GitLab installation URL and an authentication token,
+and you provide the rest of the configuration in your repository, following
+Infrastructure as Code (IaaC) best practices.
+
+A minimal repository layout looks like this, with `my_agent_1` as the name
+of your Agent:
+
+```plaintext
+|- .gitlab
+    |- agents
+       |- my_agent_1
+          |- config.yaml
+```
+
+## Synchronize manifest projects
+
+Your `config.yaml` file contains a `gitops` section, which contains a `manifest_projects`
+section. Each `id` in the `manifest_projects` section is the path to a Git repository
+with Kubernetes resource definitions in YAML or JSON format. The Agent monitors
+each project you declare, and when the project changes, GitLab deploys the changes
+using the Agent.
+
+To use multiple YAML files, specify a `paths` attribute in the `gitops` section.
+
+By default, the Agent monitors all types of resources. You can exclude some types of resources
+from monitoring. This enables you to reduce the permissions needed by the GitOps feature,
+through `resource_exclusions`.
+
+To enable a specific named resource, first use `resource_inclusions` to enable desired resources.
+The following file excerpt includes specific `api_groups` and `kinds`. The `resource_exclusions`
+which follow excludes all other `api_groups` and `kinds`:
+
+```yaml
+gitops:
+  # Manifest projects are watched by the agent. Whenever a project changes,
+  # GitLab deploys the changes using the agent.
+  manifest_projects:
+    # No authentication mechanisms are currently supported.
+    # The `id` is a path to a Git repository with Kubernetes resource definitions
+    # in YAML or JSON format.
+  - id: gitlab-org/cluster-integration/gitlab-agent
+    # Holds the only API groups and kinds of resources that gitops will monitor.
+    # Inclusion rules are evaluated first, then exclusion rules.
+    # If there is still no match, resource is monitored.
+    resource_inclusions:
+    - api_groups:
+      - apps
+      kinds:
+      - '*'
+    - api_groups:
+      - ''
+      kinds:
+      - 'ConfigMap'
+    # Holds the API groups and kinds of resources to exclude from gitops watch.
+    # Inclusion rules are evaluated first, then exclusion rules.
+    # If there is still no match, resource is monitored.
+    resource_exclusions:
+    - api_groups:
+      - '*'
+      kinds:
+      - '*'
+    # Namespace to use if not set explicitly in object manifest.
+    default_namespace: my-ns
+    # Paths inside of the repository to scan for manifest files.
+    # Directories with names starting with a dot are ignored.
+    paths:
+      # Read all .yaml files from team1/app1 directory.
+      # See https://github.com/bmatcuk/doublestar#about and
+      # https://pkg.go.dev/github.com/bmatcuk/doublestar/v2#Match for globbing rules.
+    - glob: '/team1/app1/*.yaml'
+      # Read all .yaml files from team2/apps and all subdirectories
+    - glob: '/team2/apps/**/*.yaml'
+      # If 'paths' is not specified or is an empty list, the configuration below is used
+    - glob: '/**/*.{yaml,yml,json}'
+```