Add typed command input bindings

registry_test.go

@@ -186,6 +186,9 @@ func TestNewRejectsEmptyIdentityAndInvalidBindingMetadata(t *testing.T) {
 		{validFlag("one", "x"), validFlag("one", "y")},
 		{validFlag("one", "x"), validFlag("two", "x")},
 		{validFlag("help", "")},
+		{validFlag("SomeFlag", "")},
+		{validFlag("some_flag", "")},
+		{validFlag("some--flag", "")},
 		{{binding: flagBinding[registryInput]{meta: FlagMeta{Name: "missing"}}}},
 	} {
 		if _, err := NewCommand(CommandSpec[registryInput]{Name: "flags", Flags: flags}); err == nil {