Add OM apply-configuration command stub

Create apply-configuration command with comprehensive documentation stub.
This command requires integration with operator core logic to run
reconciliation using the manifestclient.

The stub provides:
- Clear usage documentation
- Implementation requirements and steps
- Reference to cluster-authentication-operator implementation
- Key considerations for manifestclient integration

Note: Full implementation requires refactoring operator sync logic
to work with manifestclient instead of live API server.

Generated with Claude Code

Author: bertinatto

cmd/cluster-kube-controller-manager-operator/main.go

@@ -48,6 +48,7 @@ func NewSSCSCommand(ctx context.Context) *cobra.Command {
 	cmd.AddCommand(recoverycontroller.NewCertRecoveryControllerCommand(ctx))
 	cmd.AddCommand(mom.NewInputResourcesCommand(ioStreams))
 	cmd.AddCommand(mom.NewOutputResourcesCommand(ioStreams))
+	cmd.AddCommand(mom.NewApplyConfigurationCommand(ioStreams))
 
 	return cmd
 }

pkg/cmd/mom/apply_configuration_command.go

@@ -0,0 +1,42 @@
+package mom
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericiooptions"
+)
+
+func NewApplyConfigurationCommand(streams genericiooptions.IOStreams) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "apply-configuration",
+		Short: "Run operator reconciliation logic using manifestclient (not yet implemented)",
+		Long: `Run the operator's reconciliation logic once using the manifestclient.
+
+This command is not yet implemented. Implementation requires:
+
+1. Create operator client using manifestclient interfaces
+2. Create necessary informers using manifestclient
+3. Initialize the operator's controllers (targetconfigcontroller, etc.)
+4. Run sync logic ONCE (not in a loop)
+5. Return results
+
+The manifestclient is a drop-in replacement for standard Kubernetes clients
+that reads from files instead of the API server, enabling testing without a cluster.
+
+Reference implementation:
+  github.com/openshift/cluster-authentication-operator/pkg/cmd/mom/apply_configuration_command.go
+
+Key considerations:
+  - Use manifestclient instead of regular kubeClient
+  - Use manifestclient event recorder for events
+  - Call sync functions directly, don't start controllers/informers
+  - The operator needs to produce all output resources declared in output-resources
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return fmt.Errorf("apply-configuration command is not yet implemented - requires integration with operator core logic")
+		},
+	}
+
+	return cmd
+}