5 files changed, 84 insertions, 8 deletions
diff --git a/packages/cli/src/ui/commands/authCommand.test.ts b/packages/cli/src/ui/commands/authCommand.test.ts
new file mode 100644
index 00000000..d6d925db
--- /dev/null
+++ b/packages/cli/src/ui/commands/authCommand.test.ts
@@ -0,0 +1,36 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, beforeEach } from 'vitest';
+import { authCommand } from './authCommand.js';
+import { type CommandContext } from './types.js';
+import { createMockCommandContext } from '../../test-utils/mockCommandContext.js';
+
+describe('authCommand', () => {
+  let mockContext: CommandContext;
+
+  beforeEach(() => {
+    mockContext = createMockCommandContext();
+  });
+
+  it('should return a dialog action to open the auth dialog', () => {
+    if (!authCommand.action) {
+      throw new Error('The auth command must have an action.');
+    }
+
+    const result = authCommand.action(mockContext, '');
+
+    expect(result).toEqual({
+      type: 'dialog',
+      dialog: 'auth',
+    });
+  });
+
+  it('should have the correct name and description', () => {
+    expect(authCommand.name).toBe('auth');
+    expect(authCommand.description).toBe('change the auth method');
+  });
+});
diff --git a/packages/cli/src/ui/commands/authCommand.ts b/packages/cli/src/ui/commands/authCommand.ts
new file mode 100644
index 00000000..29bd2c9d
--- /dev/null
+++ b/packages/cli/src/ui/commands/authCommand.ts
@@ -0,0 +1,16 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { OpenDialogActionReturn, SlashCommand } from './types.js';
+
+export const authCommand: SlashCommand = {
+  name: 'auth',
+  description: 'change the auth method',
+  action: (_context, _args): OpenDialogActionReturn => ({
+    type: 'dialog',
+    dialog: 'auth',
+  }),
+};
diff --git a/packages/cli/src/ui/commands/types.ts b/packages/cli/src/ui/commands/types.ts
index 9aad3399..b35374a8 100644
--- a/packages/cli/src/ui/commands/types.ts
+++ b/packages/cli/src/ui/commands/types.ts
@@ -66,14 +66,13 @@ export interface MessageActionReturn {
 export interface OpenDialogActionReturn {
   type: 'dialog';
   // TODO: Add 'theme' | 'auth' | 'editor' | 'privacy' as migration happens.
-  dialog: 'help' | 'theme';
+  dialog: 'help' | 'auth' | 'theme';
 }
 
 export type SlashCommandActionReturn =
   | ToolActionReturn
   | MessageActionReturn
   | OpenDialogActionReturn;
-
 // The standardized contract for any command in the system.
 export interface SlashCommand {
   name: string;
diff --git a/packages/cli/src/ui/hooks/slashCommandProcessor.test.ts b/packages/cli/src/ui/hooks/slashCommandProcessor.test.ts
index 563092a2..d920117d 100644
--- a/packages/cli/src/ui/hooks/slashCommandProcessor.test.ts
+++ b/packages/cli/src/ui/hooks/slashCommandProcessor.test.ts
@@ -507,6 +507,33 @@ describe('useSlashCommandProcessor', () => {
       expect(commandResult).toEqual({ type: 'handled' });
     });
 
+    it('should open the auth dialog when a new command returns an auth dialog action', async () => {
+      const mockAction = vi.fn().mockResolvedValue({
+        type: 'dialog',
+        dialog: 'auth',
+      });
+      const newAuthCommand: SlashCommand = { name: 'auth', action: mockAction };
+
+      const mockLoader = async () => [newAuthCommand];
+      const commandServiceInstance = new ActualCommandService(mockLoader);
+      vi.mocked(CommandService).mockImplementation(
+        () => commandServiceInstance,
+      );
+
+      const { result } = getProcessorHook();
+      await vi.waitFor(() => {
+        expect(
+          result.current.slashCommands.some((c) => c.name === 'auth'),
+        ).toBe(true);
+      });
+
+      const commandResult = await result.current.handleSlashCommand('/auth');
+
+      expect(mockAction).toHaveBeenCalledTimes(1);
+      expect(mockOpenAuthDialog).toHaveBeenCalledWith();
+      expect(commandResult).toEqual({ type: 'handled' });
+    });
+
     it('should open the theme dialog when a new command returns a theme dialog action', async () => {
       const mockAction = vi.fn().mockResolvedValue({
         type: 'dialog',
diff --git a/packages/cli/src/ui/hooks/slashCommandProcessor.ts b/packages/cli/src/ui/hooks/slashCommandProcessor.ts
index 59f748bf..3a071fab 100644
--- a/packages/cli/src/ui/hooks/slashCommandProcessor.ts
+++ b/packages/cli/src/ui/hooks/slashCommandProcessor.ts
@@ -243,11 +243,6 @@ export const useSlashCommandProcessor = (
         },
       },
       {
-        name: 'auth',
-        description: 'change the auth method',
-        action: (_mainCommand, _subCommand, _args) => openAuthDialog(),
-      },
-      {
         name: 'editor',
         description: 'set external editor preference',
         action: (_mainCommand, _subCommand, _args) => openEditorDialog(),
@@ -1027,7 +1022,6 @@ export const useSlashCommandProcessor = (
     return commands;
   }, [
     addMessage,
-    openAuthDialog,
     openEditorDialog,
     openPrivacyNotice,
     toggleCorgiMode,
@@ -1125,6 +1119,9 @@ export const useSlashCommandProcessor = (
                   case 'help':
                     setShowHelp(true);
                     return { type: 'handled' };
+                  case 'auth':
+                    openAuthDialog();
+                    return { type: 'handled' };
                   case 'theme':
                     openThemeDialog();
                     return { type: 'handled' };
@@ -1205,6 +1202,7 @@ export const useSlashCommandProcessor = (
     [
       addItem,
       setShowHelp,
+      openAuthDialog,
       commands,
       legacyCommands,
       commandContext,