diff --git a/packages/cli-internal/src/authIdentifiers.ts b/packages/cli-internal/src/authIdentifiers.ts
new file mode 100644
index 0000000000..6b72554a4f
--- /dev/null
+++ b/packages/cli-internal/src/authIdentifiers.ts
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2025 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** Returns the secret-store service key for a given auth instance. */
+export function getAuthInstanceService(instanceName: string): string {
+  return `backstage-cli:auth-instance:${instanceName}`;
+}
diff --git a/packages/cli-internal/src/index.ts b/packages/cli-internal/src/index.ts
index 0e69d45032..281b998d92 100644
--- a/packages/cli-internal/src/index.ts
+++ b/packages/cli-internal/src/index.ts
@@ -25,3 +25,9 @@ export {
   OpaqueCommandLeafNode,
   isCommandNodeHidden,
 } from './InternalCommandNode';
+export { getAuthInstanceService } from './authIdentifiers';
+export {
+  getSecretStore,
+  resetSecretStore,
+  type SecretStore,
+} from './secretStore';
diff --git a/packages/cli-module-auth/src/lib/secretStore.ts b/packages/cli-internal/src/secretStore.ts
similarity index 87%
rename from packages/cli-module-auth/src/lib/secretStore.ts
rename to packages/cli-internal/src/secretStore.ts
index 55fac878b7..26c1e6ad2b 100644
--- a/packages/cli-module-auth/src/lib/secretStore.ts
+++ b/packages/cli-internal/src/secretStore.ts
@@ -14,11 +14,11 @@
  * limitations under the License.
  */
 
-import fs from 'fs-extra';
+import { promises as fs } from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
 
-type SecretStore = {
+export type SecretStore = {
   get(service: string, account: string): Promise<string | undefined>;
   set(service: string, account: string, secret: string): Promise<void>;
   delete(service: string, account: string): Promise<void>;
@@ -54,6 +54,15 @@ class KeytarSecretStore implements SecretStore {
   }
 }
 
+async function pathExists(p: string): Promise<boolean> {
+  try {
+    await fs.stat(p);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
 class FileSecretStore implements SecretStore {
   private readonly baseDir: string;
   constructor() {
@@ -73,17 +82,25 @@ class FileSecretStore implements SecretStore {
   }
   async get(service: string, account: string): Promise<string | undefined> {
     const file = this.filePath(service, account);
-    if (!(await fs.pathExists(file))) return undefined;
+    if (!(await pathExists(file))) {
+      return undefined;
+    }
     return await fs.readFile(file, 'utf8');
   }
   async set(service: string, account: string, secret: string): Promise<void> {
     const file = this.filePath(service, account);
-    await fs.ensureDir(path.dirname(file));
+    await fs.mkdir(path.dirname(file), { recursive: true });
     await fs.writeFile(file, secret, { encoding: 'utf8', mode: 0o600 });
   }
   async delete(service: string, account: string): Promise<void> {
     const file = this.filePath(service, account);
-    await fs.remove(file);
+    try {
+      await fs.unlink(file);
+    } catch (err) {
+      if ((err as NodeJS.ErrnoException).code !== 'ENOENT') {
+        throw err;
+      }
+    }
   }
 }
 
diff --git a/packages/cli-module-actions/src/commands/execute.ts b/packages/cli-module-actions/src/commands/execute.ts
index 4ff955096b..f130c597ce 100644
--- a/packages/cli-module-actions/src/commands/execute.ts
+++ b/packages/cli-module-actions/src/commands/execute.ts
@@ -65,9 +65,9 @@ export default async ({ args, info }: CliCommandContext) => {
     process.exit(1);
   }
 
-  const { accessToken, instance } = await resolveAuth(instanceFlag);
+  const { accessToken, baseUrl } = await resolveAuth(instanceFlag);
 
-  const client = new ActionsClient(instance.baseUrl, accessToken);
+  const client = new ActionsClient(baseUrl, accessToken);
   const actions = await client.listForPlugin(actionId);
   const action = actions.find(a => a.id === actionId);
 
diff --git a/packages/cli-module-actions/src/commands/list.ts b/packages/cli-module-actions/src/commands/list.ts
index 601fa6d2c7..2049fc3e44 100644
--- a/packages/cli-module-actions/src/commands/list.ts
+++ b/packages/cli-module-actions/src/commands/list.ts
@@ -36,7 +36,7 @@ export default async ({ args, info }: CliCommandContext) => {
     args,
   );
 
-  const { accessToken, pluginSources, instance } = await resolveAuth(
+  const { accessToken, pluginSources, baseUrl } = await resolveAuth(
     instanceFlag,
   );
 
@@ -47,7 +47,7 @@ export default async ({ args, info }: CliCommandContext) => {
     return;
   }
 
-  const client = new ActionsClient(instance.baseUrl, accessToken);
+  const client = new ActionsClient(baseUrl, accessToken);
   const actions = await client.list(pluginSources);
 
   if (!actions.length) {
diff --git a/packages/cli-module-actions/src/commands/sourcesAdd.ts b/packages/cli-module-actions/src/commands/sourcesAdd.ts
index 6d9ea2b524..0fc4addd5c 100644
--- a/packages/cli-module-actions/src/commands/sourcesAdd.ts
+++ b/packages/cli-module-actions/src/commands/sourcesAdd.ts
@@ -40,7 +40,7 @@ export default async ({ args, info }: CliCommandContext) => {
     return;
   }
 
-  await updateInstanceConfig(auth.instanceName, 'pluginSources', [
+  await updateInstanceConfig(auth.getInstanceName(), 'pluginSources', [
     ...existing,
     pluginId,
   ]);
diff --git a/packages/cli-module-actions/src/commands/sourcesRemove.ts b/packages/cli-module-actions/src/commands/sourcesRemove.ts
index 81a2d5abf3..b680c39684 100644
--- a/packages/cli-module-actions/src/commands/sourcesRemove.ts
+++ b/packages/cli-module-actions/src/commands/sourcesRemove.ts
@@ -39,7 +39,7 @@ export default async ({ args, info }: CliCommandContext) => {
   }
 
   await updateInstanceConfig(
-    auth.instanceName,
+    auth.getInstanceName(),
     'pluginSources',
     existing.filter(s => s !== pluginId),
   );
diff --git a/packages/cli-module-actions/src/lib/resolveAuth.test.ts b/packages/cli-module-actions/src/lib/resolveAuth.test.ts
index 21cf6ebc38..21f494c54a 100644
--- a/packages/cli-module-actions/src/lib/resolveAuth.test.ts
+++ b/packages/cli-module-actions/src/lib/resolveAuth.test.ts
@@ -15,7 +15,7 @@
  */
 
 import { resolveAuth } from './resolveAuth';
-import { CliAuth, type StoredInstance } from '@backstage/cli-node';
+import { CliAuth } from '@backstage/cli-node';
 
 jest.mock('@backstage/cli-node', () => {
   const actual = jest.requireActual('@backstage/cli-node');
@@ -28,23 +28,14 @@ jest.mock('@backstage/cli-node', () => {
 const mockCreate = CliAuth.create as jest.MockedFunction<typeof CliAuth.create>;
 
 describe('resolveAuth', () => {
-  const mockInstance: StoredInstance = {
-    name: 'production',
-    baseUrl: 'https://backstage.example.com',
-    clientId: 'my-client',
-    issuedAt: Date.now(),
-    accessTokenExpiresAt: Date.now() + 3600_000,
-  };
-
   beforeEach(() => {
     jest.clearAllMocks();
   });
 
   it('resolves auth with the selected instance and stored token', async () => {
     mockCreate.mockResolvedValue({
-      instance: mockInstance,
-      instanceName: mockInstance.name,
-      baseUrl: mockInstance.baseUrl,
+      getInstanceName: jest.fn().mockReturnValue('production'),
+      getBaseUrl: jest.fn().mockReturnValue('https://backstage.example.com'),
       getAccessToken: jest.fn().mockResolvedValue('test-access-token'),
       getConfig: jest.fn().mockResolvedValue(['catalog', 'scaffolder']),
     } as unknown as CliAuth);
@@ -53,7 +44,8 @@ describe('resolveAuth', () => {
 
     expect(mockCreate).toHaveBeenCalledWith({ instanceName: undefined });
     expect(result).toEqual({
-      instance: mockInstance,
+      baseUrl: 'https://backstage.example.com',
+      instanceName: 'production',
       accessToken: 'test-access-token',
       pluginSources: ['catalog', 'scaffolder'],
     });
@@ -61,9 +53,8 @@ describe('resolveAuth', () => {
 
   it('passes instance name flag to CliAuth.create', async () => {
     mockCreate.mockResolvedValue({
-      instance: mockInstance,
-      instanceName: mockInstance.name,
-      baseUrl: mockInstance.baseUrl,
+      getInstanceName: jest.fn().mockReturnValue('staging'),
+      getBaseUrl: jest.fn().mockReturnValue('https://staging.example.com'),
       getAccessToken: jest.fn().mockResolvedValue('test-access-token'),
       getConfig: jest.fn().mockResolvedValue([]),
     } as unknown as CliAuth);
@@ -75,9 +66,8 @@ describe('resolveAuth', () => {
 
   it('throws when getAccessToken fails', async () => {
     mockCreate.mockResolvedValue({
-      instance: mockInstance,
-      instanceName: mockInstance.name,
-      baseUrl: mockInstance.baseUrl,
+      getInstanceName: jest.fn().mockReturnValue('production'),
+      getBaseUrl: jest.fn().mockReturnValue('https://backstage.example.com'),
       getAccessToken: jest
         .fn()
         .mockRejectedValue(
@@ -93,9 +83,8 @@ describe('resolveAuth', () => {
 
   it('returns empty plugin sources when none are configured', async () => {
     mockCreate.mockResolvedValue({
-      instance: mockInstance,
-      instanceName: mockInstance.name,
-      baseUrl: mockInstance.baseUrl,
+      getInstanceName: jest.fn().mockReturnValue('production'),
+      getBaseUrl: jest.fn().mockReturnValue('https://backstage.example.com'),
       getAccessToken: jest.fn().mockResolvedValue('test-access-token'),
       getConfig: jest.fn().mockResolvedValue(undefined),
     } as unknown as CliAuth);
diff --git a/packages/cli-module-actions/src/lib/resolveAuth.ts b/packages/cli-module-actions/src/lib/resolveAuth.ts
index 18664b1b55..4d2afe6695 100644
--- a/packages/cli-module-actions/src/lib/resolveAuth.ts
+++ b/packages/cli-module-actions/src/lib/resolveAuth.ts
@@ -14,10 +14,11 @@
  * limitations under the License.
  */
 
-import { CliAuth, type StoredInstance } from '@backstage/cli-node';
+import { CliAuth } from '@backstage/cli-node';
 
 export async function resolveAuth(instanceFlag?: string): Promise<{
-  instance: StoredInstance;
+  baseUrl: string;
+  instanceName: string;
   accessToken: string;
   pluginSources: string[];
 }> {
@@ -25,5 +26,10 @@ export async function resolveAuth(instanceFlag?: string): Promise<{
   const accessToken = await auth.getAccessToken();
   const pluginSources = (await auth.getConfig<string[]>('pluginSources')) ?? [];
 
-  return { instance: auth.instance, accessToken, pluginSources };
+  return {
+    baseUrl: auth.getBaseUrl(),
+    instanceName: auth.getInstanceName(),
+    accessToken,
+    pluginSources,
+  };
 }
diff --git a/packages/cli-module-auth/package.json b/packages/cli-module-auth/package.json
index 94169e998e..b0e2564661 100644
--- a/packages/cli-module-auth/package.json
+++ b/packages/cli-module-auth/package.json
@@ -19,6 +19,7 @@
   "license": "Apache-2.0",
   "main": "src/index.ts",
   "types": "src/index.ts",
+  "bin": "bin/backstage-cli-module-auth",
   "files": [
     "dist",
     "bin"
@@ -50,6 +51,5 @@
   },
   "optionalDependencies": {
     "keytar": "^7.9.0"
-  },
-  "bin": "bin/backstage-cli-module-auth"
+  }
 }
diff --git a/packages/cli-module-auth/src/commands/login.ts b/packages/cli-module-auth/src/commands/login.ts
index b16060f956..6bb8751147 100644
--- a/packages/cli-module-auth/src/commands/login.ts
+++ b/packages/cli-module-auth/src/commands/login.ts
@@ -27,7 +27,7 @@ import {
   getInstanceByName,
   StoredInstance,
 } from '../lib/storage';
-import { getSecretStore } from '../lib/secretStore';
+import { getSecretStore, getAuthInstanceService } from '@internal/cli';
 import crypto from 'node:crypto';
 import fs from 'fs-extra';
 import path from 'node:path';
@@ -321,7 +321,7 @@ async function persistInstance(options: {
   const { instanceName, backendBaseUrl, clientId, token } = options;
   const secretStore = await getSecretStore();
   await withMetadataLock(async () => {
-    const service = `backstage-cli:auth-instance:${instanceName}`;
+    const service = getAuthInstanceService(instanceName);
     await secretStore.set(service, 'accessToken', token.access_token);
     if (token.refresh_token) {
       await secretStore.set(service, 'refreshToken', token.refresh_token);
diff --git a/packages/cli-module-auth/src/commands/logout.ts b/packages/cli-module-auth/src/commands/logout.ts
index f79ed2ef35..a02fb3580d 100644
--- a/packages/cli-module-auth/src/commands/logout.ts
+++ b/packages/cli-module-auth/src/commands/logout.ts
@@ -16,7 +16,7 @@
 
 import { cli } from 'cleye';
 import type { CliCommandContext } from '@backstage/cli-node';
-import { getSecretStore } from '../lib/secretStore';
+import { getSecretStore, getAuthInstanceService } from '@internal/cli';
 import {
   removeInstance,
   withMetadataLock,
@@ -47,7 +47,7 @@ export default async ({ args, info }: CliCommandContext) => {
   await withMetadataLock(async () => {
     const instance = await getInstanceByName(instanceName);
     const secretStore = await getSecretStore();
-    const service = `backstage-cli:auth-instance:${instanceName}`;
+    const service = getAuthInstanceService(instanceName);
     const refreshToken = (await secretStore.get(service, 'refreshToken')) ?? '';
 
     if (refreshToken) {
diff --git a/packages/cli-module-auth/src/commands/show.ts b/packages/cli-module-auth/src/commands/show.ts
index 6a5db7f299..275b6ca66d 100644
--- a/packages/cli-module-auth/src/commands/show.ts
+++ b/packages/cli-module-auth/src/commands/show.ts
@@ -38,7 +38,7 @@ export default async ({ args, info }: CliCommandContext) => {
   const auth = await CliAuth.create({ instanceName: instanceFlag });
   const accessToken = await auth.getAccessToken();
 
-  const authBase = new URL('/api/auth', auth.baseUrl)
+  const authBase = new URL('/api/auth', auth.getBaseUrl())
     .toString()
     .replace(/\/$/, '');
 
diff --git a/packages/cli-module-auth/src/lib/auth.test.ts b/packages/cli-module-auth/src/lib/auth.test.ts
index 5ba4ae0295..18e7658e92 100644
--- a/packages/cli-module-auth/src/lib/auth.test.ts
+++ b/packages/cli-module-auth/src/lib/auth.test.ts
@@ -16,15 +16,15 @@
 
 import { accessTokenNeedsRefresh, refreshAccessToken } from './auth';
 import * as storage from './storage';
-import * as secretStore from './secretStore';
+import * as internalCli from '@internal/cli';
 import * as http from './http';
 
 jest.mock('./storage');
-jest.mock('./secretStore');
+jest.mock('@internal/cli');
 jest.mock('./http');
 
 const mockStorage = storage as jest.Mocked<typeof storage>;
-const mockSecretStore = secretStore as jest.Mocked<typeof secretStore>;
+const mockInternalCli = internalCli as jest.Mocked<typeof internalCli>;
 const mockHttp = http as jest.Mocked<typeof http>;
 
 describe('auth', () => {
@@ -95,7 +95,10 @@ describe('auth', () => {
 
     beforeEach(() => {
       jest.clearAllMocks();
-      mockSecretStore.getSecretStore.mockResolvedValue(mockSecretStoreInstance);
+      mockInternalCli.getSecretStore.mockResolvedValue(mockSecretStoreInstance);
+      mockInternalCli.getAuthInstanceService.mockImplementation(
+        (name: string) => `backstage-cli:auth-instance:${name}`,
+      );
     });
 
     it('should successfully refresh access token', async () => {
diff --git a/packages/cli-module-auth/src/lib/auth.ts b/packages/cli-module-auth/src/lib/auth.ts
index 4b330cf982..1ad108cbf1 100644
--- a/packages/cli-module-auth/src/lib/auth.ts
+++ b/packages/cli-module-auth/src/lib/auth.ts
@@ -15,9 +15,13 @@
  */
 
 import { z } from 'zod/v3';
-import type { StoredInstance } from '@backstage/cli-node';
-import { upsertInstance, withMetadataLock, getInstanceByName } from './storage';
-import { getSecretStore } from './secretStore';
+import {
+  type StoredInstance,
+  upsertInstance,
+  withMetadataLock,
+  getInstanceByName,
+} from './storage';
+import { getSecretStore, getAuthInstanceService } from '@internal/cli';
 import { httpJson } from './http';
 
 const TokenResponseSchema = z.object({
@@ -40,7 +44,7 @@ export async function refreshAccessToken(
   return withMetadataLock(async () => {
     const instance = await getInstanceByName(instanceName);
 
-    const service = `backstage-cli:auth-instance:${instanceName}`;
+    const service = getAuthInstanceService(instanceName);
     const refreshToken = (await secretStore.get(service, 'refreshToken')) ?? '';
     if (!refreshToken) {
       throw new Error(
diff --git a/packages/cli-module-auth/src/lib/secretStore.test.ts b/packages/cli-module-auth/src/lib/secretStore.test.ts
index 6729f7c6a5..f27d364c7c 100644
--- a/packages/cli-module-auth/src/lib/secretStore.test.ts
+++ b/packages/cli-module-auth/src/lib/secretStore.test.ts
@@ -21,7 +21,7 @@ jest.mock('keytar', () => {
 import fs from 'fs-extra';
 import path from 'node:path';
 import { createMockDirectory } from '@backstage/backend-test-utils';
-import { getSecretStore, resetSecretStore } from './secretStore';
+import { getSecretStore, resetSecretStore } from '@internal/cli';
 
 const mockDir = createMockDirectory();
 
diff --git a/packages/cli-module-auth/src/lib/storage.ts b/packages/cli-module-auth/src/lib/storage.ts
index d66d4fb04a..32c6178696 100644
--- a/packages/cli-module-auth/src/lib/storage.ts
+++ b/packages/cli-module-auth/src/lib/storage.ts
@@ -22,8 +22,15 @@ import lockfile from 'proper-lockfile';
 import YAML from 'yaml';
 import { z } from 'zod/v3';
 
-export type { StoredInstance } from '@backstage/cli-node';
-import type { StoredInstance } from '@backstage/cli-node';
+export type StoredInstance = {
+  name: string;
+  baseUrl: string;
+  clientId: string;
+  issuedAt: number;
+  accessTokenExpiresAt: number;
+  selected?: boolean;
+  config?: Record<string, unknown>;
+};
 
 const METADATA_FILE = 'auth-instances.yaml';
 
diff --git a/packages/cli-node/report.api.md b/packages/cli-node/report.api.md
index eeeb92f5b3..ca10eafff2 100644
--- a/packages/cli-node/report.api.md
+++ b/packages/cli-node/report.api.md
@@ -88,12 +88,11 @@ export interface BackstagePackageJson {
 
 // @public
 export class CliAuth {
-  get baseUrl(): string;
   static create(options?: CliAuthCreateOptions): Promise<CliAuth>;
   getAccessToken(): Promise<string>;
+  getBaseUrl(): string;
   getConfig<T = unknown>(key: string): Promise<T | undefined>;
-  get instance(): StoredInstance;
-  get instanceName(): string;
+  getInstanceName(): string;
 }
 
 // @public
@@ -287,17 +286,6 @@ export function runWorkerQueueThreads<TItem, TResult, TContext>(
   results: TResult[];
 }>;
 
-// @public (undocumented)
-export type StoredInstance = {
-  name: string;
-  baseUrl: string;
-  clientId: string;
-  issuedAt: number;
-  accessTokenExpiresAt: number;
-  selected?: boolean;
-  config?: Record<string, unknown>;
-};
-
 // @public
 export class SuccessCache {
   // (undocumented)
diff --git a/packages/cli-node/src/auth/CliAuth.test.ts b/packages/cli-node/src/auth/CliAuth.test.ts
index 16a9b10dde..3d932e5e34 100644
--- a/packages/cli-node/src/auth/CliAuth.test.ts
+++ b/packages/cli-node/src/auth/CliAuth.test.ts
@@ -58,9 +58,8 @@ describe('CliAuth', () => {
       const auth = await CliAuth.create();
 
       expect(mockStorage.getSelectedInstance).toHaveBeenCalledWith(undefined);
-      expect(auth.instance).toEqual(mockInstance);
-      expect(auth.instanceName).toBe('production');
-      expect(auth.baseUrl).toBe('https://backstage.example.com');
+      expect(auth.getInstanceName()).toBe('production');
+      expect(auth.getBaseUrl()).toBe('https://backstage.example.com');
     });
 
     it('resolves a named instance when specified', async () => {
diff --git a/packages/cli-node/src/auth/CliAuth.ts b/packages/cli-node/src/auth/CliAuth.ts
index 8934e9bd7f..d7eaad6d40 100644
--- a/packages/cli-node/src/auth/CliAuth.ts
+++ b/packages/cli-node/src/auth/CliAuth.ts
@@ -21,6 +21,7 @@ import {
   accessTokenNeedsRefresh,
 } from './storage';
 import { getSecretStore, type SecretStore } from './secretStore';
+import { getAuthInstanceService } from './authIdentifiers';
 import { httpJson } from './httpJson';
 import { z } from 'zod';
 
@@ -73,18 +74,13 @@ export class CliAuth {
     this.#secretStore = secretStore;
   }
 
-  /** The resolved instance metadata. */
-  get instance(): StoredInstance {
-    return this.#instance;
-  }
-
-  /** Shorthand for `instance.name`. */
-  get instanceName(): string {
+  /** Returns the name of the resolved auth instance. */
+  getInstanceName(): string {
     return this.#instance.name;
   }
 
-  /** Shorthand for `instance.baseUrl`. */
-  get baseUrl(): string {
+  /** Returns the base URL of the resolved auth instance. */
+  getBaseUrl(): string {
     return this.#instance.baseUrl;
   }
 
@@ -97,7 +93,7 @@ export class CliAuth {
       await this.#refreshAccessToken();
     }
 
-    const service = `backstage-cli:auth-instance:${this.#instance.name}`;
+    const service = getAuthInstanceService(this.#instance.name);
     const token = await this.#secretStore.get(service, 'accessToken');
     if (!token) {
       throw new Error(
@@ -116,7 +112,7 @@ export class CliAuth {
   }
 
   async #refreshAccessToken(): Promise<void> {
-    const service = `backstage-cli:auth-instance:${this.#instance.name}`;
+    const service = getAuthInstanceService(this.#instance.name);
     const refreshToken =
       (await this.#secretStore.get(service, 'refreshToken')) ?? '';
     if (!refreshToken) {
diff --git a/packages/cli-node/src/auth/authIdentifiers.ts b/packages/cli-node/src/auth/authIdentifiers.ts
new file mode 100644
index 0000000000..16ddb5b437
--- /dev/null
+++ b/packages/cli-node/src/auth/authIdentifiers.ts
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2025 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** @internal */
+export function getAuthInstanceService(instanceName: string): string {
+  return `backstage-cli:auth-instance:${instanceName}`;
+}
diff --git a/packages/cli-node/src/auth/index.ts b/packages/cli-node/src/auth/index.ts
index c84c1742d7..d6a1b08d65 100644
--- a/packages/cli-node/src/auth/index.ts
+++ b/packages/cli-node/src/auth/index.ts
@@ -15,4 +15,3 @@
  */
 
 export { CliAuth, type CliAuthCreateOptions } from './CliAuth';
-export { type StoredInstance } from './storage';
diff --git a/packages/cli-node/src/auth/secretStore.ts b/packages/cli-node/src/auth/secretStore.ts
index a0f3c81d51..70ef5f2f72 100644
--- a/packages/cli-node/src/auth/secretStore.ts
+++ b/packages/cli-node/src/auth/secretStore.ts
@@ -14,11 +14,11 @@
  * limitations under the License.
  */
 
-import fs from 'fs-extra';
+import { promises as fs } from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
 
-/** @public */
+/** @internal */
 export type SecretStore = {
   get(service: string, account: string): Promise<string | undefined>;
   set(service: string, account: string, secret: string): Promise<void>;
@@ -55,6 +55,15 @@ class KeytarSecretStore implements SecretStore {
   }
 }
 
+async function pathExists(p: string): Promise<boolean> {
+  try {
+    await fs.stat(p);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
 class FileSecretStore implements SecretStore {
   private readonly baseDir: string;
   constructor() {
@@ -74,23 +83,31 @@ class FileSecretStore implements SecretStore {
   }
   async get(service: string, account: string): Promise<string | undefined> {
     const file = this.filePath(service, account);
-    if (!(await fs.pathExists(file))) return undefined;
+    if (!(await pathExists(file))) {
+      return undefined;
+    }
     return await fs.readFile(file, 'utf8');
   }
   async set(service: string, account: string, secret: string): Promise<void> {
     const file = this.filePath(service, account);
-    await fs.ensureDir(path.dirname(file));
+    await fs.mkdir(path.dirname(file), { recursive: true });
     await fs.writeFile(file, secret, { encoding: 'utf8', mode: 0o600 });
   }
   async delete(service: string, account: string): Promise<void> {
     const file = this.filePath(service, account);
-    await fs.remove(file);
+    try {
+      await fs.unlink(file);
+    } catch (err) {
+      if ((err as NodeJS.ErrnoException).code !== 'ENOENT') {
+        throw err;
+      }
+    }
   }
 }
 
 let singleton: SecretStore | undefined;
 
-/** @public */
+/** @internal */
 export async function getSecretStore(): Promise<SecretStore> {
   if (!singleton) {
     const keytar = await loadKeytar();