diff --git a/internal/cmd/login.go b/internal/cmd/login.go
index ac6510fdcc120950806e316cf24f653fe8270c43..00c155cbfd23a95005da10a60f9ea36ab50cbd7d 100644
--- a/internal/cmd/login.go
+++ b/internal/cmd/login.go
@@ -25,6 +25,11 @@ Available platforms are: claude.`,
 # Authenticate with Claude Code Max
 crush login claude
   `,
+	ValidArgs: []cobra.Completion{
+		"claude",
+		"anthropic",
+	},
+	Args: cobra.ExactArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
 		if len(args) > 1 {
 			return fmt.Errorf("wrong number of arguments")