refactor(cyargs): extract --url flag into cyargs for plugin commands

Three plugin commands defined --url inline without going through cyargs.
Consolidate into AddURLFlag/GetURL in cyargs/plugins.go.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: fhacloid

cmd/cycloid/beta/plugins/manager/create.go

@@ -23,7 +23,7 @@ func NewCreateCommand() *cobra.Command {
 	}
 
 	cmd.MarkFlagRequired(cyargs.AddNameFlag(cmd))
-	cmd.Flags().String("url", "", "URL of the plugin manager instance (required)")
+	cyargs.AddURLFlag(cmd, "URL of the plugin manager instance (required)")
 	cmd.MarkFlagRequired("url")
 	return cmd
 }
@@ -42,7 +42,7 @@ func createPluginManager(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	url, err := cmd.Flags().GetString("url")
+	url, err := cyargs.GetURL(cmd)
 	if err != nil {
 		return errors.Wrap(err, "unable to get --url flag")
 	}

cmd/cycloid/beta/plugins/registry/add.go

@@ -23,7 +23,7 @@ func NewAddCommand() *cobra.Command {
 	}
 
 	cmd.MarkFlagRequired(cyargs.AddNameFlag(cmd))
-	cmd.Flags().String("url", "", "URL of the plugin registry (required)")
+	cyargs.AddURLFlag(cmd, "URL of the plugin registry (required)")
 	cmd.MarkFlagRequired("url")
 	return cmd
 }
@@ -42,7 +42,7 @@ func addPluginRegistry(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	url, err := cmd.Flags().GetString("url")
+	url, err := cyargs.GetURL(cmd)
 	if err != nil {
 		return errors.Wrap(err, "unable to get --url flag")
 	}

cmd/cycloid/beta/plugins/registry/plugin/version/publish.go

@@ -23,7 +23,7 @@ func NewPublishCommand() *cobra.Command {
 		RunE: publishVersion,
 	}
 
-	cmd.Flags().String("url", "", "URL of the plugin version archive (required)")
+	cyargs.AddURLFlag(cmd, "URL of the plugin version archive (required)")
 	cmd.MarkFlagRequired("url")
 	return cmd
 }
@@ -42,7 +42,7 @@ func publishVersion(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	url, err := cmd.Flags().GetString("url")
+	url, err := cyargs.GetURL(cmd)
 	if err != nil {
 		return errors.Wrap(err, "unable to get --url flag")
 	}

internal/cyargs/plugins.go

@@ -14,6 +14,20 @@ import (
 	"github.com/cycloidio/cycloid-cli/cmd/cycloid/middleware"
 )
 
+// ---------------------------------------------------------------------------
+// URL flag (registry add, manager create, version publish)
+// ---------------------------------------------------------------------------
+
+// AddURLFlag registers a --url flag with the given usage description.
+func AddURLFlag(cmd *cobra.Command, usage string) {
+	cmd.Flags().String("url", "", usage)
+}
+
+// GetURL returns the value of the --url flag.
+func GetURL(cmd *cobra.Command) (string, error) {
+	return cmd.Flags().GetString("url")
+}
+
 // ---------------------------------------------------------------------------
 // Plugin config flags (for install / upgrade)
 // ---------------------------------------------------------------------------