v27.0.0

[eas-cli] Add simulator:logs for iOS sessions (#4545 )
* [eas-cli] Add simulator:logs Read buffered or live logs from a running iOS simulator session through its preview API, or save the logs artifact once the session has stopped. Co-Authored-By: Claude Opus 5.5 <[email protected]> * [eas-cli] Use oclif exclusive for simulator:logs --follow and --json Co-Authored-By: Claude Opus 5.5 <[email protected]> * [eas-cli] Suggest redirecting --follow to save live simulator logs Co-Authored-By: Claude Opus 5.5 <[email protected]> * [eas-cli] Report log source failures while following simulator logs Co-Authored-By: Claude Opus 5.5 <[email protected]> * [eas-cli] Close the connection of a rejected simulator preview response Co-Authored-By: Claude Opus 5.5 <[email protected]> * [eas-cli] Write simulator log health notices to stderr Co-Authored-By: Claude Opus 5.5 <[email protected]> * [eas-cli] Explain that live simulator logs need an iOS session Co-Authored-By: Claude Opus 5.5 <[email protected]> --------- Co-authored-by: Claude Opus 5.5 <[email protected]>
2026-11-15 03:38:08 -10:00 · 2026-10-27 22:10:54 +00:00 · 2026-10-27 15:02:52 -07:00 · 2026-10-27 12:34:27 -07:00
57 changed files with 2614 additions and 311 deletions
@@ -1,5 +0,0 @@
---
-'@expo/build-tools': patch
---
-
-Keep the launched app open when an Appium iOS session starts.
@@ -1,5 +0,0 @@
---
-'@expo/build-tools': patch
---
-
-Run Appium through the prepared Full Disk Access helper when available on macOS.
@@ -1,5 +0,0 @@
---
-'eas-cli': minor
---
-
-Send the `permissions.account.role` from the build profile to request a role for the build's `EXPO_TOKEN`.
@@ -1,5 +0,0 @@
---
-'eas-cli': patch
---
-
-Show permission guidance, including `permissions.account.role` in eas.json, when a build request fails with an authorization error.
@@ -1,5 +0,0 @@
---
-'eas-cli': patch
---
-
-Print the notice about eas-cli in project dependencies only when stderr is a terminal, so programs that read stderr get the command's error.
@@ -1,5 +0,0 @@
---
-'eas-cli': major
---
-
-Write the reason a command failed to stderr, next to the `command failed.` line, instead of to stdout. A program that reads the reason from stdout must read stderr instead.
@@ -1,5 +0,0 @@
---
-'eas-cli': none
---
-
-Run the GraphQL schema and generated code check on pull requests to any base branch, including stacked pull requests.
@@ -1,5 +0,0 @@
---
-'eas-cli': patch
---
-
-Show account roles and credential permission limits in `eas login` when you are already logged in.
@@ -1,5 +0,0 @@
---
-'@expo/build-tools': patch
---
-
-Identify the build or application archive when a download fails, and explain when the archive is no longer available.
@@ -1,5 +0,0 @@
---
-'@expo/build-tools': patch
---
-
-Run apsd setup in the background without delaying iOS app launch or preview readiness.
@@ -1,5 +0,0 @@
---
-'eas-cli': patch
---
-
-Fix simulator control action help routing and show help when a flag is incomplete.
@@ -1,5 +0,0 @@
---
-'@expo/build-tools': patch
---
-
-Handle a device session stopped during startup as normal cleanup instead of reporting a startup error.
@@ -1,5 +0,0 @@
---
-'@expo/build-tools': patch
---
-
-Support idle timeouts for iOS web-preview-only sessions, resetting the timer when preview input arrives.
@@ -2,6 +2,37 @@

 This is the log of notable changes to EAS CLI and related packages.

+## [27.0.0](https://github.com/expo/eas-cli/releases/tag/v27.0.0) - 2026-10-27
+
+### 🛠 Breaking changes
+
+- [eas-cli] Write the reason a command failed to stderr, next to the `command failed.` line, instead of to stdout. A program that reads the reason from stdout must read stderr instead. ([#4592](https://github.com/expo/eas-cli/pull/4592) by [@vonovak](https://github.com/vonovak))
+
+### 🎉 New features
+
+- [eas-cli] Send the `permissions.account.role` from the build profile to request a role for the build's `EXPO_TOKEN`. ([#4734](https://github.com/expo/eas-cli/pull/4734) by [@wschurman](https://github.com/wschurman))
+- [eas-cli] Add `simulator:logs` to read and follow logs from an iOS simulator session and download saved logs after it stops. ([#4545](https://github.com/expo/eas-cli/pull/4545) by [@gwdp](https://github.com/gwdp))
+
+### 🐛 Bug fixes
+
+- [build-tools] Keep the launched app open when an Appium iOS session starts. ([#4699](https://github.com/expo/eas-cli/pull/4699) by [@gwdp](https://github.com/gwdp))
+- [build-tools] Run Appium through the prepared Full Disk Access helper when available on macOS. ([#4622](https://github.com/expo/eas-cli/pull/4622) by [@gwdp](https://github.com/gwdp))
+- [eas-cli] Show permission guidance, including `permissions.account.role` in eas.json, when a build request fails with an authorization error. ([#4760](https://github.com/expo/eas-cli/pull/4760) by [@wschurman](https://github.com/wschurman))
+- [eas-cli] Print the notice about eas-cli in project dependencies only when stderr is a terminal, so programs that read stderr get the command's error. ([#4591](https://github.com/expo/eas-cli/pull/4591) by [@vonovak](https://github.com/vonovak))
+- [eas-cli] Show account roles and credential permission limits in `eas login` when you are already logged in. ([#4759](https://github.com/expo/eas-cli/pull/4759) by [@wschurman](https://github.com/wschurman))
+- [build-tools] Identify the build or application archive when a download fails, and explain when the archive is no longer available. ([#4703](https://github.com/expo/eas-cli/pull/4703) by [@gwdp](https://github.com/gwdp))
+- [build-tools] Run apsd setup in the background without delaying iOS app launch or preview readiness. ([#4706](https://github.com/expo/eas-cli/pull/4706) by [@gwdp](https://github.com/gwdp))
+- [eas-cli] Fix simulator control action help routing and show help when a flag is incomplete. ([#4681](https://github.com/expo/eas-cli/pull/4681) by [@gwdp](https://github.com/gwdp))
+- [eas-cli] Require explicit `host:` simulator-host upload paths and report missing local files. ([#4683](https://github.com/expo/eas-cli/pull/4683) by [@gwdp](https://github.com/gwdp))
+
+  Missing local absolute paths now require the `host:` prefix. Actions that require upload IDs accept local files and reject host paths with an explanation.
+- [build-tools] Handle a device session stopped during startup as normal cleanup instead of reporting a startup error. ([#4716](https://github.com/expo/eas-cli/pull/4716) by [@gwdp](https://github.com/gwdp))
+- [build-tools] Support idle timeouts for iOS web-preview-only sessions, resetting the timer when preview input arrives. ([#4731](https://github.com/expo/eas-cli/pull/4731) by [@gwdp](https://github.com/gwdp))
+
+### 🧹 Chores
+
+- [eas-cli] Run the GraphQL schema and generated code check on pull requests to any base branch, including stacked pull requests. ([#4763](https://github.com/expo/eas-cli/pull/4763) by [@wschurman](https://github.com/wschurman))
+
 ## [26.0.0](https://github.com/expo/eas-cli/releases/tag/v26.0.0) - 2026-10-26

 ### 🛠 Breaking changes
@@ -1,5 +1,5 @@
 {
  "npmClient": "yarn",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "$schema": "node_modules/lerna/schemas/lerna-schema.json"
 }
@@ -1,5 +1,16 @@
 # @expo/build-tools

+## 27.0.0
+
+### Patch Changes
+
+- Keep the launched app open when an Appium iOS session starts. ([#4699](https://github.com/expo/eas-cli/pull/4699) by [@gwdp](https://github.com/gwdp))
+- Run Appium through the prepared Full Disk Access helper when available on macOS. ([#4622](https://github.com/expo/eas-cli/pull/4622) by [@gwdp](https://github.com/gwdp))
+- Identify the build or application archive when a download fails, and explain when the archive is no longer available. ([#4703](https://github.com/expo/eas-cli/pull/4703) by [@gwdp](https://github.com/gwdp))
+- Run apsd setup in the background without delaying iOS app launch or preview readiness. ([#4706](https://github.com/expo/eas-cli/pull/4706) by [@gwdp](https://github.com/gwdp))
+- Handle a device session stopped during startup as normal cleanup instead of reporting a startup error. ([#4716](https://github.com/expo/eas-cli/pull/4716) by [@gwdp](https://github.com/gwdp))
+- Support idle timeouts for iOS web-preview-only sessions, resetting the timer when preview input arrives. ([#4731](https://github.com/expo/eas-cli/pull/4731) by [@gwdp](https://github.com/gwdp))
+
 ## 26.0.0

 ### Major Changes
@@ -1,6 +1,6 @@
 {
  "name": "@expo/build-tools",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
  "author": "Expo <[email protected]>",
@@ -42,17 +42,17 @@
  "dependencies": {
    "@expo/config": "55.0.10",
    "@expo/config-plugins": "55.0.7",
-    "@expo/downloader": "26.0.0",
-    "@expo/eas-build-job": "26.0.0",
+    "@expo/downloader": "27.0.0",
+    "@expo/eas-build-job": "27.0.0",
    "@expo/env": "^0.4.0",
-    "@expo/logger": "26.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/package-manager": "1.9.10",
    "@expo/plist": "^0.3.5",
    "@expo/results": "^1.0.0",
    "@expo/spawn-async": "1.7.2",
-    "@expo/steps": "26.0.0",
-    "@expo/template-file": "26.0.0",
-    "@expo/turtle-spawn": "26.0.0",
+    "@expo/steps": "27.0.0",
+    "@expo/template-file": "27.0.0",
+    "@expo/turtle-spawn": "27.0.0",
    "@expo/xcpretty": "^4.3.1",
    "@ngrok/ngrok": "1.7.0",
    "@sentry/node": "7.77.0",
@@ -1,5 +1,9 @@
 # create-eas-build-function

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "create-eas-build-function",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "description": "Create functions for use in EAS Build custom builds.",
  "keywords": [
    "expo",
@@ -35,7 +35,7 @@
    "clean": "rimraf ./build/ \"*.tsbuildinfo\""
  },
  "dependencies": {
-    "@expo/steps": "26.0.0"
+    "@expo/steps": "27.0.0"
  },
  "devDependencies": {
    "@expo/package-manager": "1.9.10",
@@ -1,5 +1,9 @@
 # @expo/downloader

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "@expo/downloader",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
  "author": "Expo <[email protected]>",
@@ -1,5 +1,9 @@
 # eas-build-cache-provider

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "eas-build-cache-provider",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "description": "A build cache provider plugin for the Expo CLI",
  "homepage": "https://github.com/expo/eas-cli",
  "bugs": "https://github.com/expo/eas-cli/issues",
@@ -1,5 +1,9 @@
 # @expo/eas-build-job

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 ### Major Changes
@@ -1,6 +1,6 @@
 {
  "name": "@expo/eas-build-job",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "MIT",
  "author": "Expo <[email protected]>",
@@ -25,9 +25,9 @@
    "clean": "rimraf node_modules dist coverage \"*.tsbuildinfo\""
  },
  "dependencies": {
-    "@expo/logger": "26.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/results": "1.0.0",
-    "@expo/turtle-spawn": "26.0.0",
+    "@expo/turtle-spawn": "27.0.0",
    "joi": "^17.13.1",
    "semver": "^7.6.2",
    "zod": "^4.3.5"
@@ -1,5 +1,26 @@
 # eas-cli

+## 27.0.0
+
+### Major Changes
+
+- Write the reason a command failed to stderr, next to the `command failed.` line, instead of to stdout. A program that reads the reason from stdout must read stderr instead. ([#4592](https://github.com/expo/eas-cli/pull/4592) by [@vonovak](https://github.com/vonovak))
+
+### Minor Changes
+
+- Send the `permissions.account.role` from the build profile to request a role for the build's `EXPO_TOKEN`. ([#4734](https://github.com/expo/eas-cli/pull/4734) by [@wschurman](https://github.com/wschurman))
+- Add `simulator:logs` to read and follow logs from an iOS simulator session and download saved logs after it stops. ([#4545](https://github.com/expo/eas-cli/pull/4545) by [@gwdp](https://github.com/gwdp))
+
+### Patch Changes
+
+- Show permission guidance, including `permissions.account.role` in eas.json, when a build request fails with an authorization error. ([#4760](https://github.com/expo/eas-cli/pull/4760) by [@wschurman](https://github.com/wschurman))
+- Print the notice about eas-cli in project dependencies only when stderr is a terminal, so programs that read stderr get the command's error. ([#4591](https://github.com/expo/eas-cli/pull/4591) by [@vonovak](https://github.com/vonovak))
+- Show account roles and credential permission limits in `eas login` when you are already logged in. ([#4759](https://github.com/expo/eas-cli/pull/4759) by [@wschurman](https://github.com/wschurman))
+- Fix simulator control action help routing and show help when a flag is incomplete. ([#4681](https://github.com/expo/eas-cli/pull/4681) by [@gwdp](https://github.com/gwdp))
+- Require explicit `host:` simulator-host upload paths and report missing local files. ([#4683](https://github.com/expo/eas-cli/pull/4683) by [@gwdp](https://github.com/gwdp))
+
+  Missing local absolute paths now require the `host:` prefix. Actions that require upload IDs accept local files and reject host paths with an explanation.
+
 ## 26.0.0

 ### Patch Changes
@@ -1,6 +1,6 @@
 {
  "name": "eas-cli",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "description": "EAS command line tool",
  "keywords": [
    "cli",
@@ -48,12 +48,12 @@
    "@expo/code-signing-certificates": "0.0.5",
    "@expo/config": "55.0.10",
    "@expo/config-plugins": "55.0.7",
-    "@expo/eas-build-job": "26.0.0",
-    "@expo/eas-json": "26.0.0",
+    "@expo/eas-build-job": "27.0.0",
+    "@expo/eas-json": "27.0.0",
    "@expo/env": "^1.0.0",
    "@expo/experimentation": "0.0.5",
    "@expo/json-file": "8.3.3",
-    "@expo/logger": "26.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/multipart-body-parser": "2.0.0",
    "@expo/osascript": "2.1.4",
    "@expo/package-manager": "1.9.10",
@@ -65,7 +65,7 @@
    "@expo/results": "1.0.0",
    "@expo/rudder-sdk-node": "1.1.1",
    "@expo/spawn-async": "1.7.2",
-    "@expo/steps": "26.0.0",
+    "@expo/steps": "27.0.0",
    "@expo/timeago.js": "1.0.0",
    "@oclif/core": "^4.8.3",
    "@oclif/plugin-autocomplete": "^3.2.40",
@@ -44,6 +44,10 @@ jest.mock('../../../ora', () => ({
  }),
 }));
 jest.mock('../../../utils/json');
+jest.mock('fs-extra', () => {
+  const actual = jest.requireActual<typeof import('fs-extra')>('fs-extra');
+  return { ...actual, stat: jest.fn(actual.stat) };
+});

 type DeviceRunSessionById = DeviceRunSessionByIdQuery['deviceRunSessions']['byId'];

@@ -236,12 +240,23 @@ describe(SimulatorControl, () => {
    expect(close).toHaveBeenCalledTimes(1);
  });

+  it('explains local and explicit host upload paths without running an action', async () => {
+    await createCommand(['media.add', '--help', '--id', 'session-123']).runAsync();
+
+    expect(jest.mocked(Log.log)).toHaveBeenCalledWith(
+      '  File paths are local. Use host:/absolute/path for files on the simulator host.'
+    );
+    expect(actionRequests()).toEqual([]);
+    expect(close).toHaveBeenCalledTimes(1);
+  });
+
  it('prints the host action schema as JSON for help', async () => {
    await createCommand(['app.install', '--help', '--json', '--id', 'session-123']).runAsync();

    expect(mockPrintJsonOnlyOutput).toHaveBeenCalledWith({
      action: 'app.install',
      ...catalog['app.install'],
+      description: expect.stringContaining('host:/absolute/path'),
    });
    expect(actionRequests()).toEqual([]);
    expect(close).toHaveBeenCalledTimes(1);
@@ -328,6 +343,39 @@ describe(SimulatorControl, () => {
    ]);
  });

+  it('rejects host paths for ID-only uploads and does not advertise them', async () => {
+    served = {
+      ...catalog,
+      'app.file.upload': {
+        type: 'object',
+        properties: { uploadId: { type: 'string' } },
+        upload: 'uploadId',
+        uploadAs: 'id',
+      },
+    };
+    await expect(
+      createCommand(['app.file.upload', 'host:/tmp/a.json', '--id', 'session-123']).runAsync()
+    ).rejects.toThrow('requires a local file');
+    expect(actionRequests()).toEqual([]);
+    await createCommand(['app.file.upload', '--help', '--id', 'session-123']).runAsync();
+    const lines = jest.mocked(Log.log).mock.calls.map(([line]) => String(line));
+    expect(lines.join('\n')).not.toContain('host:/absolute/path');
+    expect(lines.join('\n')).toContain('requires a local file');
+    await createCommand(['app.file.upload', '--help', '--json', '--id', 'session-123']).runAsync();
+    expect(mockPrintJsonOnlyOutput).toHaveBeenLastCalledWith(
+      expect.objectContaining({
+        description: expect.stringContaining('requires a local file'),
+      })
+    );
+  });
+
+  it('explains how to upload a local filename beginning with host:', async () => {
+    await expect(
+      createCommand(['media.add', 'host:photo.png', '--id', 'session-123']).runAsync()
+    ).rejects.toThrow('./host:photo.png');
+    expect(actionRequests()).toEqual([]);
+  });
+
  it('keeps an upload that the action goes on reading', async () => {
    const localFile = path.join(tmpDir, 'feed.mp4');
    await fs.writeFile(localFile, 'video bytes');
@@ -395,17 +443,65 @@ describe(SimulatorControl, () => {
    expect(actionRequests()).toEqual([]);
  });

-  it('passes a path that is not a local file through unchanged', async () => {
-    actionResult = ok('');
+  it('refuses a missing absolute local file without running an action', async () => {
+    const missing = path.join(tmpDir, 'missing.png');
+    await expect(
+      createCommand(['media.add', missing, '--id', 'session-123']).runAsync()
+    ).rejects.toThrow('does not exist on this computer');
+    expect(actionRequests()).toEqual([]);
+  });

-    await createCommand([
-      'app.install',
-      '/Users/runner/MyApp.ipa',
-      '--id',
-      'session-123',
-    ]).runAsync();
+  it('preserves a local filesystem failure without sending an action', async () => {
+    const denied = Object.assign(new Error('Permission denied'), { code: 'EACCES' });
+    const stat = jest
+      .mocked<(path: string) => Promise<fs.Stats>>(fs.stat)
+      .mockRejectedValueOnce(denied);
+    try {
+      await expect(
+        createCommand([
+          'media.add',
+          path.join(tmpDir, 'private.png'),
+          '--id',
+          'session-123',
+        ]).runAsync()
+      ).rejects.toBe(denied);
+      expect(actionRequests()).toEqual([]);
+      expect(close).toHaveBeenCalledTimes(1);
+    } finally {
+      stat
+        .mockReset()
+        .mockImplementation(jest.requireActual<typeof import('fs-extra')>('fs-extra').stat);
+    }
+  });

-    expect(actionRequests()).toEqual([['app.install', { path: '/Users/runner/MyApp.ipa' }]]);
+  it('passes an explicit host path through without uploading a matching local file', async () => {
+    const localFile = path.join(tmpDir, 'existing.png');
+    await fs.writeFile(localFile, 'local bytes');
+    await createCommand(['media.add', `host:${localFile}`, '--id', 'session-123']).runAsync();
+    expect(actionRequests()).toEqual([['media.add', { path: localFile }]]);
+  });
+
+  it.each(['host:relative.png', 'host:'])('rejects a non-absolute host path: %s', async value => {
+    await expect(
+      createCommand(['media.add', value, '--id', 'session-123']).runAsync()
+    ).rejects.toThrow('absolute');
+    expect(actionRequests()).toEqual([]);
+  });
+
+  it('uploads a local filename beginning with host: when explicitly relative', async () => {
+    const previous = process.cwd();
+    await fs.writeFile(path.join(tmpDir, 'host:photo.png'), 'png bytes');
+    try {
+      process.chdir(tmpDir);
+      await createCommand(['media.add', './host:photo.png', '--id', 'session-123']).runAsync();
+      expect(actionRequests().map(([action]) => action)).toEqual([
+        'upload.append',
+        'media.add',
+        'upload.remove',
+      ]);
+    } finally {
+      process.chdir(previous);
+    }
  });

  it('downloads the file an action returns', async () => {
@@ -443,7 +539,14 @@ describe(SimulatorControl, () => {
  it('lists the actions as JSON when no action is provided', async () => {
    await createCommand(['--id', 'session-123', '--json']).runAsync();

-    expect(mockPrintJsonOnlyOutput).toHaveBeenCalledWith(catalog);
+    expect(mockPrintJsonOnlyOutput).toHaveBeenCalledWith(
+      expect.objectContaining({
+        'app.install': expect.objectContaining({
+          description: expect.stringContaining('host:/absolute/path'),
+        }),
+        'hardwareKeyboard.set': catalog['hardwareKeyboard.set'],
+      })
+    );
    expect(actionRequests()).toEqual([]);
  });

@@ -0,0 +1,501 @@
+import { Config } from '@oclif/core';
+import chalk from 'chalk';
+
+import { ExpoGraphqlClient } from '../../../commandUtils/context/contextUtils/createGraphqlClient';
+import { AppPlatform, DeviceRunSessionStatus } from '../../../graphql/generated';
+import { DeviceRunSessionQuery } from '../../../graphql/queries/DeviceRunSessionQuery';
+import { downloadSimulatorArtifactAsync } from '../../../simulator/artifacts';
+import Log from '../../../log';
+import { loadSimulatorEnvAsync } from '../../../simulator/env';
+import {
+  fetchSimulatorPreviewJsonAsync,
+  resolveSimulatorPreviewAsync,
+  streamSimulatorPreviewAsync,
+} from '../../../simulator/preview';
+import { enableJsonOutput, printJsonOnlyOutput } from '../../../utils/json';
+import SimulatorLogs from '../logs';
+
+jest.mock('../../../log');
+jest.mock('../../../graphql/queries/DeviceRunSessionQuery');
+jest.mock('../../../simulator/artifacts', () => ({
+  ...jest.requireActual('../../../simulator/artifacts'),
+  downloadSimulatorArtifactAsync: jest.fn(),
+}));
+jest.mock('../../../simulator/env', () => ({
+  ...jest.requireActual('../../../simulator/env'),
+  loadSimulatorEnvAsync: jest.fn(),
+}));
+jest.mock('../../../simulator/preview', () => ({
+  ...jest.requireActual('../../../simulator/preview'),
+  resolveSimulatorPreviewAsync: jest.fn(),
+  fetchSimulatorPreviewJsonAsync: jest.fn(),
+  streamSimulatorPreviewAsync: jest.fn(),
+}));
+jest.mock('../../../utils/json');
+
+const mockLoadSimulatorEnvAsync = jest.mocked(loadSimulatorEnvAsync);
+const mockResolvePreviewAsync = jest.mocked(resolveSimulatorPreviewAsync);
+const mockFetchJsonAsync = jest.mocked(fetchSimulatorPreviewJsonAsync);
+const mockStreamAsync = jest.mocked(streamSimulatorPreviewAsync);
+const mockEnableJsonOutput = jest.mocked(enableJsonOutput);
+const mockPrintJsonOnlyOutput = jest.mocked(printJsonOnlyOutput);
+const mockLog = jest.mocked(Log.log);
+const mockWarn = jest.mocked(Log.warn);
+const mockWarnToStderr = jest.mocked(Log.warnToStderr);
+const originalColorLevel = chalk.level;
+const preview = {
+  deviceRunSessionId: 'session-id',
+  baseUrl: new URL('https://preview.test'),
+  token: 'preview-token',
+};
+const graphqlClient = {} as ExpoGraphqlClient;
+const projectDir = '/test/project';
+const line = {
+  seq: 7,
+  at: Date.parse('2026-10-05T12:00:00.000Z'),
+  raw: JSON.stringify({
+    timestamp: '2026-10-05T12:00:00.000Z',
+    processImagePath: '/apps/CoinFlip.app/CoinFlip',
+    processID: 42,
+    eventMessage: 'Initialization request completed.',
+  }),
+};
+
+function getMockOclifConfig(): Config {
+  const config = new Config({ root: __dirname });
+  config.runHook = async () => ({ failures: [], successes: [] });
+  return config;
+}
+
+describe(SimulatorLogs, () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+    process.env.EAS_SIMULATOR_SESSION_ID = 'session-id';
+    chalk.level = 0;
+    mockLoadSimulatorEnvAsync.mockResolvedValue();
+    jest
+      .mocked(DeviceRunSessionQuery.byIdAsync)
+      .mockResolvedValue({ id: 'session-id', status: DeviceRunSessionStatus.InProgress } as Awaited<
+        ReturnType<typeof DeviceRunSessionQuery.byIdAsync>
+      >);
+    mockResolvePreviewAsync.mockResolvedValue(preview);
+    mockFetchJsonAsync.mockResolvedValue(createSnapshot());
+  });
+
+  afterEach(() => {
+    delete process.env.EAS_SIMULATOR_SESSION_ID;
+    chalk.level = originalColorLevel;
+  });
+
+  it.each(['Error', 16, 'Fault', 17, 'Debug', 2])(
+    'styles OS severity %s after removing remote terminal controls',
+    async messageType => {
+      chalk.level = 1;
+      mockFetchJsonAsync.mockResolvedValue(
+        createSnapshot([
+          {
+            ...line,
+            raw: JSON.stringify({
+              ...JSON.parse(line.raw),
+              messageType,
+              processImagePath: '/apps/\u001b[35mCoinFlip\u001b[0m',
+              eventMessage: '\u001b[35mInitialization request completed.\u001b[0m\u0007',
+            }),
+          },
+        ])
+      );
+
+      await createCommand(['--timestamp']).runAsync();
+
+      const output = mockLog.mock.calls[0][0];
+      expect(output).toContain('\u001b[36m[CoinFlip:42]\u001b[39m');
+      expect(output).not.toContain('\u001b[35m');
+      expect(output).not.toContain('\u0007');
+      const message = 'Initialization request completed.';
+      const styledMessage =
+        messageType === 'Debug' || messageType === 2
+          ? chalk.dim(message)
+          : messageType === 'Fault' || messageType === 17
+            ? chalk.red.bold(message)
+            : chalk.red(message);
+      expect(output).toContain(styledMessage);
+    }
+  );
+
+  it('prints the full JSON snapshot for an explicit session without starting the log source', async () => {
+    const snapshot = createSnapshot([line]);
+    mockFetchJsonAsync.mockResolvedValue(snapshot);
+    const command = createCommand(['--id', 'session-id', '--json']);
+
+    await command.runAsync();
+
+    expect(mockEnableJsonOutput).toHaveBeenCalled();
+    expect(DeviceRunSessionQuery.byIdAsync).toHaveBeenCalledWith(graphqlClient, 'session-id');
+    expect(mockResolvePreviewAsync).toHaveBeenCalledWith(
+      expect.objectContaining({ id: 'session-id' })
+    );
+    expect(mockFetchJsonAsync).toHaveBeenCalledWith(preview, '/logs', {
+      query: { scope: 'user-apps', limit: '100', snapshot: '1' },
+    });
+    expect(mockPrintJsonOnlyOutput).toHaveBeenCalledWith({
+      deviceRunSessionId: 'session-id',
+      ...snapshot,
+    });
+    expect(mockLog).not.toHaveBeenCalled();
+    expect(mockWarn).not.toHaveBeenCalled();
+    expect(mockStreamAsync).not.toHaveBeenCalled();
+  });
+
+  it('uses the dotenv session ID when no ID is provided', async () => {
+    mockLoadSimulatorEnvAsync.mockImplementation(async () => {
+      process.env.EAS_SIMULATOR_SESSION_ID = 'dotenv-id';
+    });
+
+    await createCommand(['--json']).runAsync();
+
+    expect(mockLoadSimulatorEnvAsync).toHaveBeenCalledWith(projectDir);
+    expect(DeviceRunSessionQuery.byIdAsync).toHaveBeenCalledWith(graphqlClient, 'dotenv-id');
+  });
+
+  it('formats app messages and forwards scope and buffer limit', async () => {
+    mockFetchJsonAsync.mockResolvedValue(createSnapshot([line]));
+
+    await createCommand(['--scope', 'all', '--limit', '3']).runAsync();
+
+    expect(mockFetchJsonAsync).toHaveBeenCalledWith(preview, '/logs', {
+      query: { scope: 'all', limit: '3', snapshot: '1' },
+    });
+    expect(mockLog).toHaveBeenCalledWith('[CoinFlip:42] Initialization request completed.');
+  });
+
+  it('shows original timestamps for parsed and unparsed snapshot lines when requested', async () => {
+    mockFetchJsonAsync.mockResolvedValue(
+      createSnapshot([line, { ...line, raw: '\u001b[31mraw message\u001b[0m\u0007' }])
+    );
+
+    await createCommand(['--timestamp']).runAsync();
+
+    expect(mockLog).toHaveBeenNthCalledWith(
+      1,
+      '2026-10-05T12:00:00.000Z  [CoinFlip:42] Initialization request completed.'
+    );
+    expect(mockLog).toHaveBeenLastCalledWith('2026-10-05T12:00:00.000Z  raw message');
+  });
+
+  it('prints unparsed lines safely and reports an unhealthy log source', async () => {
+    mockFetchJsonAsync.mockResolvedValue({
+      ...createSnapshot([{ ...line, raw: '\u001b[31mraw message\u001b[0m\u0007' }]),
+      streamError: '\u001b[31mlog source restarting\u001b[0m\u0007',
+    });
+
+    await createCommand([]).runAsync();
+
+    expect(mockLog).toHaveBeenCalledWith('raw message');
+    expect(mockWarn).toHaveBeenCalledWith('log source restarting');
+  });
+
+  it('reports an unhealthy log source without claiming the buffer is simply empty', async () => {
+    mockFetchJsonAsync.mockResolvedValue({
+      ...createSnapshot(),
+      streamError: 'log source restarting',
+    });
+
+    await createCommand([]).runAsync();
+
+    expect(mockWarn).toHaveBeenCalledWith('log source restarting');
+    expect(mockLog).not.toHaveBeenCalled();
+  });
+
+  it('keeps the log source error in JSON output instead of warning', async () => {
+    const snapshot = { ...createSnapshot(), streamError: 'log source restarting' };
+    mockFetchJsonAsync.mockResolvedValue(snapshot);
+
+    await createCommand(['--json']).runAsync();
+
+    expect(mockPrintJsonOnlyOutput).toHaveBeenCalledWith({
+      deviceRunSessionId: 'session-id',
+      ...snapshot,
+    });
+    expect(mockWarn).not.toHaveBeenCalled();
+  });
+
+  it('uses the current time for a snapshot line with an invalid time', async () => {
+    const now = jest.spyOn(Date, 'now').mockReturnValue(Date.parse('2026-10-05T13:00:00.000Z'));
+    mockFetchJsonAsync.mockResolvedValue(
+      createSnapshot([line, { ...line, at: 1e300, raw: 'raw message' }])
+    );
+
+    await createCommand(['--timestamp']).runAsync();
+
+    expect(mockLog).toHaveBeenLastCalledWith('2026-10-05T13:00:00.000Z  raw message');
+    now.mockRestore();
+  });
+
+  it('explains that an empty snapshot needs following before actions', async () => {
+    await createCommand([]).runAsync();
+
+    expect(mockLog).toHaveBeenCalledWith(
+      'No buffered logs. Use --follow to collect logs before performing actions.'
+    );
+  });
+
+  it('formats replayed and new raw SSE logs without requiring envelopes', async () => {
+    mockStreamAsync.mockImplementation(async (_preview, _path, onData) => {
+      onData(line.raw);
+      onData('\u001b[31mnew message\u001b[0m\u0007');
+    });
+
+    await createCommand(['--id', 'session-id', '--follow']).runAsync();
+
+    expect(mockStreamAsync).toHaveBeenCalledWith(preview, '/logs', expect.any(Function), {
+      query: { scope: 'user-apps', limit: '100' },
+      signal: expect.any(AbortSignal),
+    });
+    expect(mockLog).toHaveBeenCalledTimes(2);
+    expect(mockLog).toHaveBeenNthCalledWith(1, '[CoinFlip:42] Initialization request completed.');
+    expect(mockLog).toHaveBeenLastCalledWith('new message');
+    expect(mockFetchJsonAsync).not.toHaveBeenCalled();
+    expect(mockPrintJsonOnlyOutput).not.toHaveBeenCalled();
+  });
+
+  it('uses server envelopes for accurate timestamps while following unparsed logs', async () => {
+    mockStreamAsync.mockImplementation(async (_preview, _path, onData) => {
+      onData(JSON.stringify(line));
+      onData(JSON.stringify({ ...line, at: line.at + 1_000, raw: 'new message' }));
+    });
+
+    await createCommand(['--follow', '--timestamp']).runAsync();
+
+    expect(mockStreamAsync).toHaveBeenCalledWith(preview, '/logs', expect.any(Function), {
+      query: { scope: 'user-apps', limit: '100', envelope: '1' },
+      signal: expect.any(AbortSignal),
+    });
+    expect(mockLog).toHaveBeenNthCalledWith(
+      1,
+      '2026-10-05T12:00:00.000Z  [CoinFlip:42] Initialization request completed.'
+    );
+    expect(mockLog).toHaveBeenLastCalledWith('2026-10-05T12:00:01.000Z  new message');
+  });
+
+  it('prints a frame that is not an envelope instead of ending the stream', async () => {
+    mockStreamAsync.mockImplementation(async (_preview, _path, onData) => {
+      onData('\u001b[31mnot an envelope\u001b[0m');
+      onData(JSON.stringify({ seq: 8 }));
+      onData(JSON.stringify(line));
+    });
+
+    await createCommand(['--follow', '--timestamp']).runAsync();
+
+    expect(mockLog).toHaveBeenCalledTimes(3);
+    expect(mockLog).toHaveBeenNthCalledWith(1, 'not an envelope');
+    expect(mockLog).toHaveBeenNthCalledWith(2, '{"seq":8}');
+    expect(mockLog).toHaveBeenLastCalledWith(
+      '2026-10-05T12:00:00.000Z  [CoinFlip:42] Initialization request completed.'
+    );
+  });
+
+  it.each([
+    JSON.stringify({ ...line, at: 'not-a-number' }),
+    JSON.stringify({ ...line, at: null }),
+    JSON.stringify(line).replace(String(line.at), '1e400'),
+    JSON.stringify({ ...line, at: 1e300 }),
+  ])('prints an envelope with an invalid time instead of ending the stream %#', async frame => {
+    mockStreamAsync.mockImplementation(async (_preview, _path, onData) => {
+      onData(frame);
+    });
+
+    await createCommand(['--follow', '--timestamp']).runAsync();
+
+    expect(mockLog).toHaveBeenCalledWith(frame);
+  });
+
+  it('reports a failed log source while its stream only sends heartbeats', async () => {
+    jest.useFakeTimers();
+    try {
+      mockFetchJsonAsync
+        .mockResolvedValueOnce({
+          ...createSnapshot(),
+          status: 'restarting',
+          streamError: '\u001b[31mlog stream exited (code 1, signal null)\u001b[0m',
+        })
+        .mockResolvedValueOnce({
+          ...createSnapshot(),
+          status: 'restarting',
+          streamError: 'log stream exited (code 1, signal null)',
+        })
+        .mockResolvedValueOnce(createSnapshot());
+      // A connected stream that only receives heartbeats never calls onData.
+      mockStreamAsync.mockImplementation(async () => {
+        await jest.advanceTimersByTimeAsync(30_000);
+      });
+
+      await createCommand(['--follow', '--scope', 'all']).runAsync();
+
+      expect(mockFetchJsonAsync).toHaveBeenCalledTimes(3);
+      expect(mockFetchJsonAsync).toHaveBeenCalledWith(preview, '/logs', {
+        query: { scope: 'all', limit: '1', snapshot: '1' },
+      });
+      // Both notices go to stderr, so `--follow > logs.txt` keeps only log lines.
+      expect(mockWarnToStderr.mock.calls).toEqual([
+        [
+          "Simulator logs are not being collected. The session's log source stopped: log stream exited (code 1, signal null). It restarts automatically, and logs from this gap are missing.",
+        ],
+        ['Simulator log collection resumed.'],
+      ]);
+      expect(mockWarn).not.toHaveBeenCalled();
+      expect(mockLog).not.toHaveBeenCalled();
+    } finally {
+      jest.useRealTimers();
+    }
+  });
+
+  it('stops checking the log source when following stops', async () => {
+    jest.useFakeTimers();
+    try {
+      mockStreamAsync.mockResolvedValue();
+
+      await createCommand(['--follow']).runAsync();
+      await jest.advanceTimersByTimeAsync(30_000);
+
+      expect(mockFetchJsonAsync).not.toHaveBeenCalled();
+    } finally {
+      jest.useRealTimers();
+    }
+  });
+
+  it('stops following on Ctrl+C and removes its interrupt handler', async () => {
+    const listeners = process.listeners('SIGINT');
+    let signal: AbortSignal | undefined;
+    mockStreamAsync.mockImplementation(async (_preview, _path, _onData, options) => {
+      signal = options?.signal;
+      process.emit('SIGINT');
+    });
+
+    await createCommand(['--follow']).runAsync();
+
+    expect(signal?.aborted).toBe(true);
+    expect(process.listeners('SIGINT')).toEqual(listeners);
+  });
+
+  it('rejects JSON follow output before resolving a session', async () => {
+    await expect(createCommand(['--json', '--follow']).runAsync()).rejects.toThrow(
+      '--json=true cannot also be provided when using --follow'
+    );
+
+    expect(mockEnableJsonOutput).toHaveBeenCalled();
+    expect(mockLoadSimulatorEnvAsync).not.toHaveBeenCalled();
+    expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+  });
+
+  it.each([DeviceRunSessionStatus.Stopped, DeviceRunSessionStatus.Errored])(
+    'downloads logs for a %s session without accessing preview',
+    async status => {
+      const session = { id: 'session-id', status } as Awaited<
+        ReturnType<typeof DeviceRunSessionQuery.byIdAsync>
+      >;
+      jest.mocked(DeviceRunSessionQuery.byIdAsync).mockResolvedValue(session);
+      await createCommand(['--artifact', '2', '--output', 'logs.ndjson', '--json']).runAsync();
+      expect(downloadSimulatorArtifactAsync).toHaveBeenCalledWith(session, 'simulator-log', {
+        artifact: 2,
+        output: 'logs.ndjson',
+        nonInteractive: true,
+        json: true,
+      });
+      expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+      expect(DeviceRunSessionQuery.byIdAsync).toHaveBeenCalledTimes(1);
+    }
+  );
+
+  it('rejects following a stopped session with a download action', async () => {
+    jest
+      .mocked(DeviceRunSessionQuery.byIdAsync)
+      .mockResolvedValue({ id: 'session-id', status: DeviceRunSessionStatus.Stopped } as Awaited<
+        ReturnType<typeof DeviceRunSessionQuery.byIdAsync>
+      >);
+    await expect(createCommand(['--follow']).runAsync()).rejects.toThrow('Use --output <path>');
+    expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+  });
+
+  it.each([
+    ['--artifact', '1'],
+    ['--output', 'logs.ndjson'],
+  ])('rejects artifact flags on a running session %s', async (...args) => {
+    await expect(createCommand(args).runAsync()).rejects.toThrow(
+      'only available for stopped sessions'
+    );
+    expect(mockFetchJsonAsync).not.toHaveBeenCalled();
+  });
+
+  it.each([[], ['--follow'], ['--json']])(
+    'explains that a live Android session has no logs %s',
+    async (...args) => {
+      jest.mocked(DeviceRunSessionQuery.byIdAsync).mockResolvedValue({
+        id: 'session-id',
+        status: DeviceRunSessionStatus.InProgress,
+        platform: AppPlatform.Android,
+      } as Awaited<ReturnType<typeof DeviceRunSessionQuery.byIdAsync>>);
+
+      await expect(createCommand(args).runAsync()).rejects.toThrow(
+        'Live logs are only available for iOS simulator sessions.'
+      );
+
+      expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+      expect(mockFetchJsonAsync).not.toHaveBeenCalled();
+      expect(mockStreamAsync).not.toHaveBeenCalled();
+    }
+  );
+
+  it.each(['0', '-1'])('rejects a nonpositive buffer limit %s', async limit => {
+    await expect(createCommand(['--limit', limit]).runAsync()).rejects.toThrow();
+
+    expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+  });
+
+  it('rejects invalid scopes', async () => {
+    await expect(createCommand(['--scope', 'system']).runAsync()).rejects.toThrow();
+
+    expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+  });
+
+  it('stops before contacting the preview when there is no session', async () => {
+    delete process.env.EAS_SIMULATOR_SESSION_ID;
+
+    await expect(createCommand([]).runAsync()).rejects.toThrow('No simulator session ID provided.');
+
+    expect(mockResolvePreviewAsync).not.toHaveBeenCalled();
+    expect(mockFetchJsonAsync).not.toHaveBeenCalled();
+    expect(mockStreamAsync).not.toHaveBeenCalled();
+  });
+
+  it('propagates preview errors without printing an empty result', async () => {
+    mockFetchJsonAsync.mockRejectedValue(new Error('The simulator preview refused access.'));
+
+    await expect(createCommand([]).runAsync()).rejects.toThrow(
+      'The simulator preview refused access.'
+    );
+
+    expect(mockLog).not.toHaveBeenCalled();
+  });
+});
+
+function createCommand(args: string[]): SimulatorLogs {
+  const command = new SimulatorLogs(args, getMockOclifConfig());
+  // @ts-expect-error getContextAsync is protected
+  jest.spyOn(command, 'getContextAsync').mockResolvedValue({
+    loggedIn: { graphqlClient },
+    projectDir,
+  });
+  return command;
+}
+
+function createSnapshot(lines: (typeof line)[] = []): object {
+  return {
+    device: 'device-id',
+    latestSeq: 7,
+    oldestSeq: 1,
+    bufferedBytes: 200,
+    status: 'streaming',
+    streamError: null,
+    lines,
+  };
+}
@@ -148,7 +148,11 @@ export default class SimulatorControl extends EasCommand {

  private printCatalog(catalog: HostActionCatalog, jsonFlag: boolean): void {
    if (jsonFlag) {
-      printJsonOnlyOutput(catalog);
+      printJsonOnlyOutput(
+        Object.fromEntries(
+          Object.entries(catalog).map(([name, entry]) => [name, withUploadPathHelp(entry)])
+        )
+      );
      return;
    }
    const names = Object.keys(catalog).sort();
@@ -167,7 +171,7 @@ export default class SimulatorControl extends EasCommand {

  private printActionHelp(action: string, entry: HostActionCatalogEntry, jsonFlag: boolean): void {
    if (jsonFlag) {
-      printJsonOnlyOutput({ ...entry, action });
+      printJsonOnlyOutput({ ...withUploadPathHelp(entry), action });
      return;
    }
    Log.newLine();
@@ -198,6 +202,11 @@ export default class SimulatorControl extends EasCommand {
        '  Action arguments refer to the simulator host. Use --output for the local filename.'
      );
    }
+    const uploadHelp = uploadPathHelp(entry);
+    if (uploadHelp) {
+      Log.newLine();
+      Log.log(`  ${uploadHelp}`);
+    }
    Log.newLine();
  }

@@ -270,8 +279,24 @@ export default class SimulatorControl extends EasCommand {
  }
 }

+function uploadPathHelp(entry: HostActionCatalogEntry): string | undefined {
+  if (!entry.upload) {
+    return undefined;
+  }
+  return entry.uploadAs === 'id'
+    ? 'This action requires a local file to upload. host: paths are not supported.'
+    : 'File paths are local. Use host:/absolute/path for files on the simulator host.';
+}
+
+function withUploadPathHelp(entry: HostActionCatalogEntry): HostActionCatalogEntry {
+  const help = uploadPathHelp(entry);
+  return help
+    ? { ...entry, description: [entry.description, help].filter(Boolean).join('\n\n') }
+    : entry;
+}
+
 async function findLocalUploadAsync(
-  { upload: param, uploadWhen = {} }: HostActionCatalogEntry,
+  { upload: param, uploadWhen = {}, uploadAs }: HostActionCatalogEntry,
  params: Record<string, unknown>
 ): Promise<{ param: string; path: string } | null> {
  const value = param ? params[param] : undefined;
@@ -279,13 +304,33 @@ async function findLocalUploadAsync(
  if (!param || typeof value !== 'string' || !applies) {
    return null;
  }
-  const stat = await fs.stat(value).catch(() => null);
+  if (value.startsWith('host:')) {
+    if (uploadAs === 'id') {
+      throw new Error(
+        'This action requires a local file to upload; host: paths are not supported.'
+      );
+    }
+    const hostPath = value.slice('host:'.length);
+    if (!path.posix.isAbsolute(hostPath)) {
+      throw new Error(
+        `A host: path must be absolute, for example host:/tmp/app.tar.gz. For a local filename beginning with host:, use ./${value}.`
+      );
+    }
+    params[param] = hostPath;
+    return null;
+  }
+  const stat = await fs.stat(value).catch((error: NodeJS.ErrnoException) => {
+    if (error.code === 'ENOENT' || error.code === 'ENOTDIR') {
+      return null;
+    }
+    throw error;
+  });
  if (stat?.isDirectory()) {
    throw new Error(`${value} is a folder. Pass the path of a file.`);
  }
-  if (!stat && !path.isAbsolute(value)) {
+  if (!stat) {
    throw new Error(
-      `${value} does not exist on this computer. Pass the path of a local file, or an absolute path on the simulator host.`
+      `${value} does not exist on this computer. Pass a local file, or prefix an absolute simulator-host path with host:.`
    );
  }
  return stat ? { param, path: value } : null;
@@ -0,0 +1,251 @@
+import { Flags } from '@oclif/core';
+
+import EasCommand from '../../commandUtils/EasCommand';
+import {
+  EasNonInteractiveAndJsonFlags,
+  resolveNonInteractiveAndJsonFlags,
+} from '../../commandUtils/flags';
+import { AppPlatform } from '../../graphql/generated';
+import { DeviceRunSessionQuery } from '../../graphql/queries/DeviceRunSessionQuery';
+import Log from '../../log';
+import { downloadSimulatorArtifactAsync, hasSimulatorArtifacts } from '../../simulator/artifacts';
+import {
+  EAS_SIMULATOR_SESSION_ID,
+  SIMULATOR_DOTENV_FILE_NAME,
+  loadSimulatorEnvAsync,
+} from '../../simulator/env';
+import {
+  type SimulatorPreview,
+  fetchSimulatorPreviewJsonAsync,
+  resolveSimulatorPreviewAsync,
+  streamSimulatorPreviewAsync,
+} from '../../simulator/preview';
+import {
+  formatLogLine,
+  isValidLogTime,
+  stripTerminalControlCharacters,
+} from '../../simulator/utils';
+import { enableJsonOutput, printJsonOnlyOutput } from '../../utils/json';
+
+// serve-sim keeps sending heartbeats while its log source restarts, so the stream alone cannot show a failure.
+const LOG_SOURCE_HEALTH_CHECK_INTERVAL_MS = 10_000;
+
+interface SimulatorLogLine {
+  seq: number;
+  at: number;
+  raw: string;
+}
+
+interface SimulatorLogsSnapshot {
+  device: string;
+  latestSeq: number;
+  oldestSeq: number;
+  bufferedBytes: number;
+  status: string;
+  streamError: string | null;
+  lines: SimulatorLogLine[];
+}
+
+export default class SimulatorLogs extends EasCommand {
+  static override aliases = ['sim:logs'];
+  static override description =
+    '[EXPERIMENTAL] show buffered logs from a remote iOS simulator session';
+
+  static override examples = [
+    '<%= config.bin %> simulator:logs --follow',
+    '<%= config.bin %> simulator:logs --json',
+  ];
+
+  static override flags = {
+    id: Flags.string({
+      description: `Simulator session ID. Defaults to ${SIMULATOR_DOTENV_FILE_NAME}.`,
+    }),
+    artifact: Flags.integer({
+      min: 1,
+      description: 'Artifact index to download from a stopped session (1-based).',
+    }),
+    output: Flags.string({
+      char: 'o',
+      description: 'Save a stopped session artifact to this path.',
+    }),
+    follow: Flags.boolean({
+      char: 'f',
+      description: 'Stream new logs. Start following before performing actions to collect them.',
+      exclusive: ['json'],
+    }),
+    scope: Flags.option({
+      description: 'Show user app logs or all device logs while the session runs.',
+      options: ['user-apps', 'all'] as const,
+      default: 'user-apps',
+    })(),
+    limit: Flags.integer({
+      description: 'Maximum number of buffered log lines to show while the session runs.',
+      default: 100,
+      min: 1,
+    }),
+    timestamp: Flags.boolean({
+      description: 'Show timestamps in live human-readable log output.',
+    }),
+    ...EasNonInteractiveAndJsonFlags,
+  };
+
+  static override contextDefinition = {
+    ...this.ContextOptions.LoggedIn,
+    ...this.ContextOptions.ProjectDir,
+  };
+
+  async runAsync(): Promise<void> {
+    // Before parsing, so only the JSON result reaches stdout.
+    if (this.argv.includes('--json')) {
+      enableJsonOutput();
+    }
+    const { flags } = await this.parse(SimulatorLogs);
+    const { json: jsonFlag, nonInteractive } = resolveNonInteractiveAndJsonFlags(flags);
+
+    const {
+      projectDir,
+      loggedIn: { graphqlClient },
+    } = await this.getContextAsync(SimulatorLogs, { nonInteractive });
+    await loadSimulatorEnvAsync(projectDir);
+    const deviceRunSessionId = flags.id ?? process.env[EAS_SIMULATOR_SESSION_ID];
+    if (!deviceRunSessionId) {
+      throw new Error(
+        `No simulator session ID provided. Pass --id, or run \`eas simulator:start\` first to write ${SIMULATOR_DOTENV_FILE_NAME}.`
+      );
+    }
+    const session = await DeviceRunSessionQuery.byIdAsync(graphqlClient, deviceRunSessionId);
+    if (hasSimulatorArtifacts(session)) {
+      if (flags.follow) {
+        throw new Error(
+          'The session has stopped. --follow is only available while it runs. Use --output <path> to download its logs artifact.'
+        );
+      }
+      await downloadSimulatorArtifactAsync(session, 'simulator-log', {
+        artifact: flags.artifact,
+        output: flags.output,
+        nonInteractive,
+        json: jsonFlag,
+      });
+      return;
+    }
+    if (session.platform === AppPlatform.Android) {
+      throw new Error(
+        'Live logs are only available for iOS simulator sessions. This session runs an Android emulator, whose preview server does not stream logs. Start an iOS session with `eas simulator:start --platform ios` to read logs.'
+      );
+    }
+    const preview = await resolveSimulatorPreviewAsync(session);
+    if (flags.artifact !== undefined || flags.output !== undefined) {
+      throw new Error(
+        '--artifact and --output are only available for stopped sessions. To save live logs, follow them into a file: `eas simulator:logs --follow > logs.txt`.'
+      );
+    }
+    const query = { scope: flags.scope, limit: String(flags.limit) };
+
+    if (flags.follow) {
+      const abortController = new AbortController();
+      const interruptHandler = (): void => {
+        if (abortController.signal.aborted) {
+          process.exit(130);
+        }
+        abortController.abort();
+      };
+      process.on('SIGINT', interruptHandler);
+      const stopHealthChecks = watchLogSourceHealth(preview, flags.scope, abortController.signal);
+      try {
+        await streamSimulatorPreviewAsync(
+          preview,
+          '/logs',
+          data => {
+            Log.log(flags.timestamp ? formatLogEnvelope(data) : formatLogLine(data));
+          },
+          {
+            query: { ...query, ...(flags.timestamp ? { envelope: '1' } : {}) },
+            signal: abortController.signal,
+          }
+        );
+      } finally {
+        stopHealthChecks();
+        process.removeListener('SIGINT', interruptHandler);
+      }
+      return;
+    }
+
+    const snapshot = await fetchSimulatorPreviewJsonAsync<SimulatorLogsSnapshot>(preview, '/logs', {
+      query: { ...query, snapshot: '1' },
+    });
+    if (!jsonFlag && snapshot.streamError) {
+      Log.warn(stripTerminalControlCharacters(snapshot.streamError));
+    }
+
+    if (jsonFlag) {
+      printJsonOnlyOutput({ deviceRunSessionId: preview.deviceRunSessionId, ...snapshot });
+      return;
+    }
+    if (snapshot.lines.length === 0) {
+      // The warning above already explains why the buffer can be empty.
+      if (!snapshot.streamError) {
+        Log.log('No buffered logs. Use --follow to collect logs before performing actions.');
+      }
+      return;
+    }
+    for (const line of snapshot.lines) {
+      Log.log(formatLogLine(line.raw, flags.timestamp, line.at));
+    }
+  }
+}
+
+function formatLogEnvelope(data: string): string {
+  let line: Partial<SimulatorLogLine> | undefined;
+  try {
+    line = JSON.parse(data);
+  } catch {}
+  return typeof line?.raw === 'string' && isValidLogTime(line.at)
+    ? formatLogLine(line.raw, true, line.at)
+    : formatLogLine(data);
+}
+
+/** Polls the log source while following and reports when it stops or recovers. Returns a stop function. */
+function watchLogSourceHealth(
+  preview: SimulatorPreview,
+  scope: string,
+  signal: AbortSignal
+): () => void {
+  let failing = false;
+  let checking = false;
+  const checkAsync = async (): Promise<void> => {
+    checking = true;
+    try {
+      const { status, streamError } = await fetchSimulatorPreviewJsonAsync<SimulatorLogsSnapshot>(
+        preview,
+        '/logs',
+        { query: { scope, limit: '1', snapshot: '1' } }
+      );
+      if (signal.aborted) {
+        return;
+      }
+      if (!failing && status !== 'streaming') {
+        failing = true;
+        const reason = streamError ? `: ${stripTerminalControlCharacters(streamError)}` : '';
+        // stderr, so the notice stays out of `--follow > logs.txt`.
+        Log.warnToStderr(
+          `Simulator logs are not being collected. The session's log source stopped${reason}. It restarts automatically, and logs from this gap are missing.`
+        );
+      } else if (failing && status === 'streaming' && !streamError) {
+        failing = false;
+        Log.warnToStderr('Simulator log collection resumed.');
+      }
+    } catch {
+      // The stream itself reports connection failures.
+    } finally {
+      checking = false;
+    }
+  };
+  const timer = setInterval(() => {
+    if (!checking) {
+      void checkAsync();
+    }
+  }, LOG_SOURCE_HEALTH_CHECK_INTERVAL_MS);
+  return () => {
+    clearInterval(timer);
+  };
+}
@@ -45,6 +45,12 @@ export default class Log {
    console.error(...Log.withTextColor(args, chalk.stderr.red));
  }

+  public static warnToStderr(...args: any[]): void {
+    Log.updateIsLastLineNewLine(args);
+    // eslint-disable-next-line no-console
+    console.error(...Log.withTextColor(args, chalk.stderr.yellow));
+  }
+
  public static warn(...args: any[]): void {
    Log.consoleLog(...Log.withTextColor(args, chalk.yellow));
  }
@@ -0,0 +1,235 @@
+import fs from 'fs-extra';
+import { createServer } from 'node:http';
+import { type AddressInfo } from 'node:net';
+import os from 'node:os';
+import path from 'node:path';
+import { Readable } from 'node:stream';
+
+import fetch, { Response } from '../../fetch';
+import { DeviceRunSessionStatus } from '../../graphql/generated';
+import Log from '../../log';
+import { promptAsync, selectAsync } from '../../prompts';
+import { printJsonOnlyOutput } from '../../utils/json';
+import {
+  type SimulatorSession,
+  downloadSimulatorArtifactAsync,
+  hasSimulatorArtifacts,
+} from '../artifacts';
+import { downloadSimulatorFileAsync } from '../download';
+
+jest.mock('../../fetch');
+jest.mock('../../log');
+jest.mock('../../ora', () => ({
+  ora: () => ({ start: () => ({ succeed: jest.fn(), fail: jest.fn() }) }),
+}));
+jest.mock('../../prompts');
+jest.mock('../../utils/json');
+jest.mock('../download');
+
+function artifact(
+  id: string,
+  type = 'simulator-log',
+  createdAt = '2026-10-07T12:00:00Z'
+): SimulatorSession['artifacts'][number] {
+  return {
+    id,
+    name: `Log ${id}`,
+    filename: `${id}.ndjson`,
+    downloadUrl: `https://storage.test/${id}?token=secret`,
+    createdAt,
+    updatedAt: createdAt,
+    fileSizeBytes: 100,
+    metadata: { __eas_type: type, udid: 'SIM-A', part: 2 },
+  };
+}
+
+const first = artifact('a');
+function session(artifacts = [first]): SimulatorSession {
+  return {
+    id: 'session-id',
+    status: DeviceRunSessionStatus.Stopped,
+    artifacts,
+  } as SimulatorSession;
+}
+
+const options = { output: 'logs.ndjson', nonInteractive: true, json: false };
+
+beforeEach(() => {
+  jest.clearAllMocks();
+  jest.mocked(downloadSimulatorFileAsync).mockResolvedValue('/logs.ndjson');
+});
+
+it.each([DeviceRunSessionStatus.Stopped, DeviceRunSessionStatus.Errored])(
+  'uses artifacts for %s',
+  status => {
+    expect(hasSimulatorArtifacts({ ...session(), status })).toBe(true);
+  }
+);
+
+it.each([
+  DeviceRunSessionStatus.InProgress,
+  DeviceRunSessionStatus.Queued,
+  DeviceRunSessionStatus.Starting,
+])('does not use artifacts for %s', status => {
+  expect(hasSimulatorArtifacts({ ...session(), status })).toBe(false);
+});
+
+it('reports missing artifacts without contacting storage', async () => {
+  await expect(
+    downloadSimulatorArtifactAsync(
+      session([artifact('a', 'session-events')]),
+      'simulator-log',
+      options
+    )
+  ).rejects.toThrow('No matching artifacts');
+  expect(downloadSimulatorFileAsync).not.toHaveBeenCalled();
+});
+
+it('automatically selects one artifact and prints its saved path', async () => {
+  await downloadSimulatorArtifactAsync(session(), 'simulator-log', options);
+  expect(downloadSimulatorFileAsync).toHaveBeenCalledWith('logs.ndjson', expect.any(Function));
+  expect(Log.log).toHaveBeenCalledWith('Saved Log a to /logs.ndjson.');
+  expect(selectAsync).not.toHaveBeenCalled();
+});
+
+it('sorts available indexes, sanitizes labels, and requires explicit selection noninteractively', async () => {
+  const older = {
+    ...artifact('b', 'simulator-log', '2026-10-07T11:00:00Z'),
+    name: '\u001b[31mEarlier\u001b[0m\u0007',
+  };
+  await expect(
+    downloadSimulatorArtifactAsync(session([first, older]), 'simulator-log', options)
+  ).rejects.toThrow(
+    '1. Earlier — b.ndjson (100 B) (SIM-A) (part 2)\n2. Log a — a.ndjson (100 B) (SIM-A) (part 2)'
+  );
+  expect(downloadSimulatorFileAsync).not.toHaveBeenCalled();
+});
+
+it.each([0, -1, 3, 1.5])('rejects invalid index %s and lists indexes', async index => {
+  await expect(
+    downloadSimulatorArtifactAsync(session([first, artifact('b')]), 'simulator-log', {
+      ...options,
+      artifact: index,
+    })
+  ).rejects.toThrow('out of range. Choose an artifact with --artifact');
+  expect(downloadSimulatorFileAsync).not.toHaveBeenCalled();
+});
+
+it('uses the explicit 1-based index and returns metadata without storage credentials', async () => {
+  const second = artifact('b');
+  await downloadSimulatorArtifactAsync(session([second, first]), 'simulator-log', {
+    ...options,
+    artifact: 2,
+    json: true,
+  });
+  expect(printJsonOnlyOutput).toHaveBeenCalledWith({
+    deviceRunSessionId: 'session-id',
+    artifact: {
+      id: second.id,
+      name: second.name,
+      filename: second.filename,
+      metadata: second.metadata,
+    },
+    filePath: '/logs.ndjson',
+  });
+  expect(Log.log).not.toHaveBeenCalled();
+  expect(JSON.stringify(jest.mocked(printJsonOnlyOutput).mock.calls)).not.toContain('secret');
+});
+
+it('prompts for a selection and destination with a basename default', async () => {
+  jest.mocked(selectAsync).mockResolvedValue(2);
+  jest.mocked(promptAsync).mockResolvedValue({ filePath: 'chosen.ndjson' });
+  await downloadSimulatorArtifactAsync(
+    session([first, { ...artifact('b'), filename: '../saved.ndjson' }]),
+    'simulator-log',
+    { nonInteractive: false, json: false }
+  );
+  expect(selectAsync).toHaveBeenCalledWith('Select an artifact to download:', [
+    { title: '1. Log a — a.ndjson (100 B) (SIM-A) (part 2)', value: 1 },
+    { title: '2. Log b — ../saved.ndjson (100 B) (SIM-A) (part 2)', value: 2 },
+  ]);
+  expect(promptAsync).toHaveBeenCalledWith(expect.objectContaining({ initial: 'saved.ndjson' }));
+  expect(downloadSimulatorFileAsync).toHaveBeenCalledWith('chosen.ndjson', expect.any(Function));
+});
+
+it('requires output without prompting in noninteractive mode', async () => {
+  await expect(
+    downloadSimulatorArtifactAsync(session(), 'simulator-log', { nonInteractive: true, json: true })
+  ).rejects.toThrow('Pass --output');
+  expect(promptAsync).not.toHaveBeenCalled();
+  expect(downloadSimulatorFileAsync).not.toHaveBeenCalled();
+});
+
+it('downloads from storage without a preview bearer or redirect restrictions', async () => {
+  const response = new Response(Readable.from(['logs']));
+  jest.mocked(fetch).mockResolvedValue(response);
+  jest.mocked(downloadSimulatorFileAsync).mockImplementation(async (_output, getResponse) => {
+    await expect(getResponse(new AbortController().signal)).resolves.toBe(response);
+    return '/logs.ndjson';
+  });
+  await downloadSimulatorArtifactAsync(session(), 'simulator-log', options);
+  expect(fetch).toHaveBeenCalledWith(first.downloadUrl, {
+    signal: expect.any(AbortSignal),
+    timeout: 30_000,
+  });
+});
+
+it('redacts signed URLs from storage failures', async () => {
+  jest.mocked(fetch).mockRejectedValue(new Error(first.downloadUrl));
+  jest.mocked(downloadSimulatorFileAsync).mockImplementation(async (_output, getResponse) => {
+    await getResponse(new AbortController().signal);
+    return '/logs.ndjson';
+  });
+  const downloading = downloadSimulatorArtifactAsync(session(), 'simulator-log', options);
+  await expect(downloading).rejects.toThrow('Could not download the session artifact');
+  await expect(downloading).rejects.not.toThrow('secret');
+});
+
+it('closes an unfinished HTTP error response without exposing storage credentials', async () => {
+  const actualFetch = jest.requireActual<typeof import('../../fetch')>('../../fetch').default;
+  const actualDownload = jest.requireActual<typeof import('../download')>('../download');
+  jest.mocked(fetch).mockImplementation(actualFetch);
+  jest
+    .mocked(downloadSimulatorFileAsync)
+    .mockImplementation(actualDownload.downloadSimulatorFileAsync);
+  const directory = await fs.mkdtemp(path.join(os.tmpdir(), 'sim-artifact-error-'));
+  let markClosed = (): void => {};
+  const closed = new Promise<void>(resolve => {
+    markClosed = resolve;
+  });
+  const server = createServer((_request, response) => {
+    response.once('close', markClosed);
+    response.writeHead(403);
+    response.write('secret storage token');
+  });
+  await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve));
+  const failedArtifact = {
+    ...first,
+    downloadUrl: `http://127.0.0.1:${(server.address() as AddressInfo).port}/?token=secret`,
+  };
+  let expired = false;
+  const deadline = setTimeout(() => {
+    expired = true;
+    server.closeAllConnections();
+  }, 2_000);
+  try {
+    const downloading = downloadSimulatorArtifactAsync(session([failedArtifact]), 'simulator-log', {
+      ...options,
+      output: path.join(directory, 'logs.ndjson'),
+    });
+    await expect(downloading).rejects.toThrow('Could not download the session artifact');
+    await expect(downloading).rejects.not.toThrow('secret');
+    await closed;
+    expect(expired).toBe(false);
+    expect(await fs.readdir(directory)).toEqual([]);
+  } finally {
+    clearTimeout(deadline);
+    server.closeAllConnections();
+    await new Promise<void>(resolve =>
+      server.close(() => {
+        resolve();
+      })
+    );
+    await fs.remove(directory);
+  }
+});
@@ -0,0 +1,133 @@
+import fs from 'fs-extra';
+import { createServer } from 'node:http';
+import { type AddressInfo } from 'node:net';
+import os from 'node:os';
+import path from 'node:path';
+import { PassThrough, Readable } from 'node:stream';
+
+import fetch, { Response } from '../../fetch';
+import { downloadSimulatorFileAsync } from '../download';
+
+let directory: string;
+let output: string;
+beforeEach(async () => {
+  directory = await fs.mkdtemp(path.join(os.tmpdir(), 'sim-artifact-test-'));
+  output = path.join(directory, 'capture.har');
+});
+afterEach(async () => {
+  await fs.remove(directory);
+});
+
+it('writes private files and removes its interrupt listener after success', async () => {
+  const listeners = process.listeners('SIGINT');
+  await expect(
+    downloadSimulatorFileAsync(output, async () => new Response(Readable.from(['private'])))
+  ).resolves.toBe(output);
+  expect(await fs.readFile(output, 'utf8')).toBe('private');
+  expect((await fs.stat(output)).mode & 0o777).toBe(0o600);
+  expect(process.listeners('SIGINT')).toEqual(listeners);
+});
+
+it('preserves an existing output file', async () => {
+  await fs.writeFile(output, 'existing');
+  await expect(
+    downloadSimulatorFileAsync(output, async () => new Response(Readable.from(['replacement'])))
+  ).rejects.toThrow('already exists');
+  expect(await fs.readFile(output, 'utf8')).toBe('existing');
+});
+
+it('refuses a symlink without changing its target', async () => {
+  const target = path.join(directory, 'target');
+  await fs.writeFile(target, 'existing');
+  await fs.symlink(target, output);
+  await expect(
+    downloadSimulatorFileAsync(output, async () => new Response(Readable.from(['replacement'])))
+  ).rejects.toThrow('already exists');
+  expect(await fs.readFile(target, 'utf8')).toBe('existing');
+  expect((await fs.lstat(output)).isSymbolicLink()).toBe(true);
+});
+
+it('preserves a file created by a competing process during the request', async () => {
+  await expect(
+    downloadSimulatorFileAsync(output, async () => {
+      await fs.writeFile(output, 'competitor');
+      return new Response(Readable.from(['replacement']));
+    })
+  ).rejects.toThrow('already exists');
+  expect(await fs.readFile(output, 'utf8')).toBe('competitor');
+});
+
+it('removes only its partial file after a body failure', async () => {
+  const body = new PassThrough();
+  const downloading = downloadSimulatorFileAsync(output, async () => new Response(body));
+  body.write('partial');
+  while (!(await fs.pathExists(output))) {
+    await new Promise(resolve => setImmediate(resolve));
+  }
+  body.destroy(new Error('secret storage URL'));
+  await expect(downloading).rejects.toThrow('Could not save the download');
+  expect(await fs.pathExists(output)).toBe(false);
+});
+
+it('removes the file on an immediate response failure', async () => {
+  const body = Readable.from(
+    (async function* () {
+      yield 'partial';
+      throw new Error('secret storage URL');
+    })()
+  );
+  const downloading = downloadSimulatorFileAsync(output, async () => new Response(body));
+  await expect(downloading).rejects.toThrow('Could not save the download');
+  expect(await fs.readdir(directory)).toEqual([]);
+});
+
+it('preserves existing files on request failure', async () => {
+  await expect(
+    downloadSimulatorFileAsync(output, async () => {
+      await fs.writeFile(output, 'existing');
+      throw new Error('request failed');
+    })
+  ).rejects.toThrow('request failed');
+  expect(await fs.readFile(output, 'utf8')).toBe('existing');
+});
+
+it('follows storage redirects and cancels a real HTTP download with full cleanup', async () => {
+  let markClosed: () => void = () => {};
+  const closed = new Promise<void>(resolve => {
+    markClosed = resolve;
+  });
+  const server = createServer((request, response) => {
+    if (request.url === '/redirect') {
+      response.writeHead(302, { location: '/body' });
+      response.end();
+    } else {
+      response.once('close', markClosed);
+      response.writeHead(200);
+      response.write('partial');
+    }
+  });
+  await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve));
+  const url = `http://127.0.0.1:${(server.address() as AddressInfo).port}/redirect`;
+  const listeners = process.listeners('SIGINT');
+  try {
+    const downloading = downloadSimulatorFileAsync(
+      output,
+      async signal => await fetch(url, { signal })
+    );
+    while (!(await fs.pathExists(output))) {
+      await new Promise(resolve => setImmediate(resolve));
+    }
+    process.emit('SIGINT');
+    await expect(downloading).rejects.toThrow('canceled');
+    await closed;
+    expect(await fs.pathExists(output)).toBe(false);
+    expect(process.listeners('SIGINT')).toEqual(listeners);
+  } finally {
+    server.closeAllConnections();
+    await new Promise<void>(resolve =>
+      server.close(() => {
+        resolve();
+      })
+    );
+  }
+});
@@ -0,0 +1,473 @@
+import { createServer } from 'node:http';
+import { type AddressInfo } from 'node:net';
+import { PassThrough, Readable } from 'node:stream';
+
+import fetch, { Headers, RequestError, Response } from '../../fetch';
+import { DeviceRunSessionByIdQuery, DeviceRunSessionStatus } from '../../graphql/generated';
+import {
+  fetchSimulatorPreviewAsync,
+  fetchSimulatorPreviewJsonAsync,
+  resolveSimulatorPreviewAsync,
+  streamSimulatorPreviewAsync,
+} from '../preview';
+
+jest.mock('../../fetch', () => ({
+  __esModule: true,
+  ...jest.requireActual('../../fetch'),
+  default: jest.fn(),
+}));
+
+const preview = {
+  deviceRunSessionId: 'session-id',
+  baseUrl: new URL('https://preview.test'),
+  token: 'secret-token',
+};
+
+function session(
+  remoteConfig: unknown,
+  status = DeviceRunSessionStatus.InProgress
+): DeviceRunSessionByIdQuery['deviceRunSessions']['byId'] {
+  return {
+    id: 'session-id',
+    status,
+    remoteConfig,
+  } as DeviceRunSessionByIdQuery['deviceRunSessions']['byId'];
+}
+
+function rejectWithStatus(status: number): void {
+  jest
+    .mocked(fetch)
+    .mockRejectedValue(
+      new RequestError('not found', new Response(Readable.from(['']), { status }))
+    );
+}
+
+beforeEach(() => {
+  jest.clearAllMocks();
+});
+
+describe(resolveSimulatorPreviewAsync, () => {
+  it.each([
+    ['ArgentRunSessionRemoteConfig', 'webPreviewToken'],
+    ['AgentDeviceRunSessionRemoteConfig', 'webPreviewToken'],
+    ['AppiumRunSessionRemoteConfig', 'webPreviewToken'],
+    ['ServeSimRunSessionRemoteConfig', 'previewToken'],
+    ['WebPreviewOnlyRunSessionRemoteConfig', 'previewToken'],
+  ])(
+    'resolves preview authentication for %s without using controller credentials',
+    async (__typename, tokenKey) => {
+      const currentSession = session({
+        __typename,
+        previewApiUrl: 'https://preview.test/prefix/?device=SIM-A&token=old-token#fragment',
+        [tokenKey]: 'preview-token',
+        toolsAuthToken: 'wrong-controller-token',
+        agentDeviceRemoteSessionToken: 'wrong-controller-token',
+      });
+      const resolved = await resolveSimulatorPreviewAsync(currentSession);
+      expect(resolved.token).toBe('preview-token');
+      expect(resolved.baseUrl.toString()).toBe('https://preview.test/prefix/?device=SIM-A');
+    }
+  );
+
+  it.each([
+    [DeviceRunSessionStatus.Stopped, { previewApiUrl: 'https://preview.test' }, 'is not running'],
+    [
+      DeviceRunSessionStatus.InProgress,
+      { webPreviewUrl: 'https://expo.dev/preview' },
+      'does not expose a preview API',
+    ],
+    [
+      DeviceRunSessionStatus.InProgress,
+      { previewApiUrl: 'not a URL', webPreviewToken: 'preview-token' },
+      'invalid preview API URL',
+    ],
+    [
+      DeviceRunSessionStatus.InProgress,
+      { previewApiUrl: 'file:///private/secret', webPreviewToken: 'preview-token' },
+      'invalid preview API URL',
+    ],
+    [
+      DeviceRunSessionStatus.InProgress,
+      { __typename: 'ArgentRunSessionRemoteConfig', previewApiUrl: 'https://preview.test' },
+      'does not expose a preview API',
+    ],
+    [
+      DeviceRunSessionStatus.InProgress,
+      {
+        __typename: 'ArgentRunSessionRemoteConfig',
+        previewApiUrl: 'https://preview.test/?token=embedded',
+      },
+      'does not expose a preview API',
+    ],
+  ])('rejects unavailable or invalid preview configuration %#', async (status, config, message) => {
+    await expect(resolveSimulatorPreviewAsync(session(config, status))).rejects.toThrow(message);
+  });
+});
+
+describe(fetchSimulatorPreviewAsync, () => {
+  it('requests the route on the preview API origin with header authentication', async () => {
+    jest.mocked(fetch).mockResolvedValue(new Response('{}'));
+    await fetchSimulatorPreviewAsync(preview, '/logs', { query: { snapshot: '1' } });
+    expect(fetch).toHaveBeenCalledWith('https://preview.test/logs?snapshot=1', expect.anything());
+    expect(jest.mocked(fetch).mock.calls[0][1]?.redirect).toBe('error');
+    const headers = new Headers(jest.mocked(fetch).mock.calls[0][1]?.headers);
+    expect(headers.get('authorization')).toBe('Bearer secret-token');
+  });
+
+  it('rejects redirects before sending preview credentials to another server', async () => {
+    const destination = jest.fn();
+    const target = createServer((request, response) => {
+      destination(request.headers.authorization);
+      response.end('{}');
+    });
+    await new Promise<void>(resolve => target.listen(0, '127.0.0.1', resolve));
+    const source = createServer((_request, response) => {
+      response.writeHead(302, {
+        location: `http://127.0.0.1:${(target.address() as AddressInfo).port}/logs`,
+      });
+      response.end();
+    });
+    await new Promise<void>(resolve => source.listen(0, '127.0.0.1', resolve));
+    jest
+      .mocked(fetch)
+      .mockImplementationOnce(
+        jest.requireActual<typeof import('../../fetch')>('../../fetch').default
+      );
+    try {
+      await expect(
+        fetchSimulatorPreviewAsync(
+          {
+            ...preview,
+            baseUrl: new URL(`http://127.0.0.1:${(source.address() as AddressInfo).port}`),
+          },
+          '/logs'
+        )
+      ).rejects.toThrow('Could not connect');
+      expect(destination).not.toHaveBeenCalled();
+    } finally {
+      source.closeAllConnections();
+      target.closeAllConnections();
+      await Promise.all([
+        new Promise<void>(resolve =>
+          source.close(() => {
+            resolve();
+          })
+        ),
+        new Promise<void>(resolve =>
+          target.close(() => {
+            resolve();
+          })
+        ),
+      ]);
+    }
+  });
+
+  it('reports an offline preview tunnel before interpreting the route failure', async () => {
+    jest.mocked(fetch).mockRejectedValue(
+      new RequestError(
+        'https://preview.test/?token=secret-token',
+        new Response(Readable.from(['secret response']), {
+          status: 404,
+          headers: { 'ngrok-error-code': 'ERR_NGROK_3200' },
+        })
+      )
+    );
+    await expect(
+      fetchSimulatorPreviewAsync(preview, '/logs', { notFoundMessage: 'Not found here.' })
+    ).rejects.toThrow(
+      'The simulator preview is offline. The session may have stopped or reached its time limit. Start a new session with `eas simulator:start`.'
+    );
+  });
+
+  it.each([
+    [401, 'refused access'],
+    [403, 'refused access'],
+    [404, 'does not support this request'],
+    [500, 'HTTP 500'],
+  ])('reports HTTP %s without exposing response bodies or credentials', async (status, message) => {
+    jest
+      .mocked(fetch)
+      .mockRejectedValue(
+        new RequestError(
+          'https://preview.test/?token=secret-token',
+          new Response(Readable.from(['secret response']), { status })
+        )
+      );
+    const error = fetchSimulatorPreviewAsync(preview, '/logs');
+    await expect(error).rejects.toThrow(message);
+    await expect(error).rejects.not.toThrow('secret');
+  });
+
+  it('closes the connection of an unfinished error response and keeps its body out of the error', async () => {
+    const server = createServer((_request, response) => {
+      response.writeHead(403, { 'content-type': 'text/plain' });
+      response.write('secret response that never ends');
+    });
+    const closed = new Promise<void>(resolve => {
+      server.once('connection', socket => socket.once('close', resolve));
+    });
+    await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve));
+    jest
+      .mocked(fetch)
+      .mockImplementationOnce(
+        jest.requireActual<typeof import('../../fetch')>('../../fetch').default
+      );
+    let timeout: NodeJS.Timeout | undefined;
+    try {
+      const error = fetchSimulatorPreviewJsonAsync(
+        {
+          ...preview,
+          baseUrl: new URL(`http://127.0.0.1:${(server.address() as AddressInfo).port}`),
+        },
+        '/logs',
+        { query: { snapshot: '1' } }
+      );
+      await expect(error).rejects.toThrow('refused access');
+      await expect(error).rejects.not.toThrow('secret');
+      await Promise.race([
+        closed,
+        new Promise<void>((_resolve, reject) => {
+          timeout = setTimeout(() => {
+            reject(new Error('The error response connection stayed open.'));
+          }, 1000);
+        }),
+      ]);
+    } finally {
+      clearTimeout(timeout);
+      server.closeAllConnections();
+      await new Promise<void>(resolve =>
+        server.close(() => {
+          resolve();
+        })
+      );
+    }
+  });
+
+  it('uses the caller message for a missing route', async () => {
+    rejectWithStatus(404);
+    await expect(
+      fetchSimulatorPreviewAsync(preview, '/crashes/old-id', {
+        notFoundMessage: 'The crash report was not found.',
+      })
+    ).rejects.toThrow('The crash report was not found.');
+  });
+
+  it('does not expose URLs in connection errors', async () => {
+    jest.mocked(fetch).mockRejectedValueOnce(new Error('https://preview.test/?token=secret-token'));
+    await expect(fetchSimulatorPreviewAsync(preview, '/logs')).rejects.toThrow(
+      'Could not connect to the simulator preview API.'
+    );
+  });
+});
+
+describe(fetchSimulatorPreviewJsonAsync, () => {
+  it('requests JSON and returns the parsed response', async () => {
+    jest.mocked(fetch).mockResolvedValue(new Response('{"lines":[]}'));
+    await expect(
+      fetchSimulatorPreviewJsonAsync(preview, '/logs', { query: { snapshot: '1' } })
+    ).resolves.toEqual({ lines: [] });
+    expect(fetch).toHaveBeenCalledWith('https://preview.test/logs?snapshot=1', expect.anything());
+    expect(jest.mocked(fetch).mock.calls[0][1]?.redirect).toBe('error');
+    const headers = new Headers(jest.mocked(fetch).mock.calls[0][1]?.headers);
+    expect(headers.get('accept')).toBe('application/json');
+  });
+
+  it('passes the caller message for a missing route', async () => {
+    rejectWithStatus(404);
+    await expect(
+      fetchSimulatorPreviewJsonAsync(preview, '/crashes/old-id', {
+        notFoundMessage: 'The crash report was not found.',
+      })
+    ).rejects.toThrow('The crash report was not found.');
+  });
+
+  it('does not expose response data in invalid JSON errors', async () => {
+    jest.mocked(fetch).mockResolvedValueOnce(new Response('secret-token invalid json'));
+    const error = fetchSimulatorPreviewJsonAsync(preview, '/logs');
+    await expect(error).rejects.toThrow('Could not read the simulator preview API response.');
+    await expect(error).rejects.not.toThrow('secret-token');
+  });
+});
+
+describe(streamSimulatorPreviewAsync, () => {
+  const signal = new AbortController().signal;
+
+  function getRequestSignal(): AbortSignal | undefined {
+    return jest.mocked(fetch).mock.calls[0][1]?.signal ?? undefined;
+  }
+
+  it('parses SSE across chunk boundaries and reports the server closing the stream', async () => {
+    const body = Readable.from([
+      ': heartbeat\r\ndata: fir',
+      'st\r\ndata: second\r\n\r\ndata: last\n\n',
+    ]);
+    jest
+      .mocked(fetch)
+      .mockResolvedValue(new Response(body, { headers: { 'content-type': 'text/event-stream' } }));
+    const onData = jest.fn();
+    await expect(streamSimulatorPreviewAsync(preview, '/logs', onData, { signal })).rejects.toThrow(
+      'The simulator preview stream ended unexpectedly.'
+    );
+    expect(onData.mock.calls).toEqual([['first\nsecond'], ['last']]);
+    expect(getRequestSignal()?.aborted).toBe(true);
+    expect(jest.mocked(fetch).mock.calls[0][1]?.redirect).toBe('error');
+    const headers = new Headers(jest.mocked(fetch).mock.calls[0][1]?.headers);
+    expect(headers.get('accept')).toBe('text/event-stream');
+  });
+
+  it('preserves setup errors when a follow request is refused', async () => {
+    rejectWithStatus(403);
+    await expect(
+      streamSimulatorPreviewAsync(preview, '/logs', jest.fn(), { signal })
+    ).rejects.toThrow('refused access');
+  });
+
+  it('stops when the signal aborts and releases the response', async () => {
+    const body = new PassThrough();
+    jest.mocked(fetch).mockImplementationOnce(async (_url, init) => {
+      init?.signal?.addEventListener('abort', () => body.destroy(new Error('aborted')));
+      return new Response(body, { headers: { 'content-type': 'text/event-stream' } });
+    });
+    const abortController = new AbortController();
+    const onData = jest.fn(() => {
+      abortController.abort();
+    });
+    const following = streamSimulatorPreviewAsync(preview, '/logs', onData, {
+      signal: abortController.signal,
+    });
+    body.write('data: marker\n\n');
+    await following;
+    expect(onData).toHaveBeenCalledWith('marker');
+    expect(body.destroyed).toBe(true);
+  });
+
+  it('stops when the signal aborts while waiting for response headers', async () => {
+    const abortController = new AbortController();
+    jest.mocked(fetch).mockImplementationOnce(
+      async (_url, init) =>
+        await new Promise<Response>((_resolve, reject) => {
+          init?.signal?.addEventListener('abort', () => {
+            reject(new Error('aborted'));
+          });
+          process.nextTick(() => {
+            abortController.abort();
+          });
+        })
+    );
+    const onData = jest.fn();
+    await streamSimulatorPreviewAsync(preview, '/logs', onData, {
+      signal: abortController.signal,
+    });
+    expect(onData).not.toHaveBeenCalled();
+  });
+
+  it('reports a stream that fails while reading without echoing its data', async () => {
+    const body = new PassThrough();
+    jest
+      .mocked(fetch)
+      .mockResolvedValueOnce(
+        new Response(body, { headers: { 'content-type': 'text/event-stream' } })
+      );
+    const following = streamSimulatorPreviewAsync(preview, '/logs', jest.fn(), { signal });
+    body.destroy(new Error('secret-token'));
+    await expect(following).rejects.toThrow('The simulator preview stream ended unexpectedly.');
+    await expect(following).rejects.not.toThrow('secret-token');
+  });
+
+  it('rethrows handler errors unchanged and closes the connection', async () => {
+    jest.mocked(fetch).mockResolvedValueOnce(
+      new Response(Readable.from(['data: frame\n\n']), {
+        headers: { 'content-type': 'text/event-stream' },
+      })
+    );
+    await expect(
+      streamSimulatorPreviewAsync(
+        preview,
+        '/logs',
+        () => {
+          throw new Error('Handler failed.');
+        },
+        { signal }
+      )
+    ).rejects.toThrow('Handler failed.');
+    expect(getRequestSignal()?.aborted).toBe(true);
+  });
+
+  it('reports a stream that goes silent after an event once the idle timeout passes', async () => {
+    const server = createServer((_request, response) => {
+      response.writeHead(200, { 'content-type': 'text/event-stream' });
+      response.write(':\n\ndata: marker\n\n');
+    });
+    await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve));
+    const remote = {
+      ...preview,
+      baseUrl: new URL(`http://127.0.0.1:${(server.address() as AddressInfo).port}`),
+    };
+    jest
+      .mocked(fetch)
+      .mockImplementationOnce(
+        jest.requireActual<typeof import('../../fetch')>('../../fetch').default
+      );
+    jest.useFakeTimers({ doNotFake: ['nextTick', 'setImmediate', 'queueMicrotask'] });
+    try {
+      let received: () => void = () => {};
+      const receivedMarker = new Promise<void>(resolve => {
+        received = resolve;
+      });
+      const following = streamSimulatorPreviewAsync(remote, '/logs', received, { signal });
+      await receivedMarker;
+      jest.advanceTimersByTime(60_000);
+      await expect(following).rejects.toThrow('The simulator preview stream ended unexpectedly.');
+    } finally {
+      jest.useRealTimers();
+      server.closeAllConnections();
+      await new Promise<void>(resolve =>
+        server.close(() => {
+          resolve();
+        })
+      );
+    }
+  });
+
+  it('closes the upstream connection after rejecting a response that is not an event stream', async () => {
+    const server = createServer((_request, response) => {
+      response.writeHead(200, { 'content-type': 'text/plain' });
+      response.write('body that never ends');
+    });
+    const closed = new Promise<void>(resolve => {
+      server.once('connection', socket => socket.once('close', resolve));
+    });
+    await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve));
+    const remote = {
+      ...preview,
+      baseUrl: new URL(`http://127.0.0.1:${(server.address() as AddressInfo).port}`),
+    };
+    jest
+      .mocked(fetch)
+      .mockImplementationOnce(
+        jest.requireActual<typeof import('../../fetch')>('../../fetch').default
+      );
+    let timeout: NodeJS.Timeout | undefined;
+    try {
+      await expect(
+        streamSimulatorPreviewAsync(remote, '/logs', jest.fn(), { signal })
+      ).rejects.toThrow('does not support streaming');
+      await Promise.race([
+        closed,
+        new Promise<void>((_resolve, reject) => {
+          timeout = setTimeout(() => {
+            reject(new Error('The upstream connection stayed open.'));
+          }, 1000);
+        }),
+      ]);
+    } finally {
+      clearTimeout(timeout);
+      server.closeAllConnections();
+      await new Promise<void>(resolve =>
+        server.close(() => {
+          resolve();
+        })
+      );
+    }
+  });
+});
@@ -22,6 +22,7 @@ import {
  getPreviewApiAccess,
  getRemoteSessionEnvironmentVariables,
  sanitizeRemoteConfigForJson,
+  stripTerminalControlCharacters,
 } from '../utils';

 const agentDeviceConfig = {
@@ -966,3 +967,19 @@ describe('embed instructions', () => {
    expect(formatRemoteSessionInstructions(config, 'dotenv')).not.toContain('tok-1');
  });
 });
+
+describe(stripTerminalControlCharacters, () => {
+  it('removes terminal escapes and all control characters by default', () => {
+    expect(stripTerminalControlCharacters('\u001b[31mhello\u001b[0m\u0007\n\tworld\u009b')).toBe(
+      'helloworld'
+    );
+  });
+
+  it('keeps newlines and tabs when requested', () => {
+    expect(
+      stripTerminalControlCharacters('\u001b[31mhello\u001b[0m\u0007\n\tworld', {
+        keepNewlinesAndTabs: true,
+      })
+    ).toBe('hello\n\tworld');
+  });
+});
@@ -0,0 +1,119 @@
+import path from 'node:path';
+
+import { downloadSimulatorFileAsync } from './download';
+import { stripTerminalControlCharacters } from './utils';
+import fetch from '../fetch';
+import { DeviceRunSessionByIdQuery, DeviceRunSessionStatus } from '../graphql/generated';
+import Log from '../log';
+import { ora } from '../ora';
+import { formatBytes } from '../utils/files';
+import { promptAsync, selectAsync } from '../prompts';
+import { printJsonOnlyOutput } from '../utils/json';
+
+export type SimulatorSession = DeviceRunSessionByIdQuery['deviceRunSessions']['byId'];
+
+export function hasSimulatorArtifacts(session: SimulatorSession): boolean {
+  return (
+    session.status === DeviceRunSessionStatus.Stopped ||
+    session.status === DeviceRunSessionStatus.Errored
+  );
+}
+
+export async function downloadSimulatorArtifactAsync(
+  session: SimulatorSession,
+  type: string,
+  {
+    artifact: index,
+    output,
+    nonInteractive,
+    json,
+  }: { artifact?: number; output?: string; nonInteractive: boolean; json: boolean }
+): Promise<void> {
+  const artifacts = session.artifacts
+    .filter(artifact => artifact.metadata?.__eas_type === type)
+    .sort(
+      (a, b) =>
+        Date.parse(a.createdAt) - Date.parse(b.createdAt) ||
+        a.name.localeCompare(b.name) ||
+        a.id.localeCompare(b.id)
+    );
+  if (artifacts.length === 0) {
+    throw new Error(
+      'No matching artifacts are available for this session. Artifacts may still be uploading or may not have been recorded. Run `eas simulator:get` to check the session, then try again.'
+    );
+  }
+  const titles = artifacts.map((artifact, i) => {
+    const metadata = artifact.metadata;
+    const device = metadata?.deviceName ?? metadata?.udid;
+    const part = metadata?.part;
+    return stripTerminalControlCharacters(
+      `${i + 1}. ${artifact.name} — ${artifact.filename} (${formatBytes(artifact.fileSizeBytes ?? 0)})${device ? ` (${device})` : ''}${part !== undefined ? ` (part ${part})` : ''}`
+    );
+  });
+  const selectionMessage = `Choose an artifact with --artifact <index>:\n${titles.join('\n')}`;
+  let selectedIndex = index;
+  if (
+    selectedIndex !== undefined &&
+    (!Number.isInteger(selectedIndex) || selectedIndex < 1 || selectedIndex > artifacts.length)
+  ) {
+    throw new Error(`The artifact index is out of range. ${selectionMessage}`);
+  }
+  if (selectedIndex === undefined) {
+    if (artifacts.length === 1) {
+      selectedIndex = 1;
+    } else if (nonInteractive) {
+      throw new Error(selectionMessage);
+    } else {
+      selectedIndex = await selectAsync(
+        'Select an artifact to download:',
+        titles.map((title, i) => ({ title, value: i + 1 }))
+      );
+    }
+  }
+  const artifact = artifacts[selectedIndex - 1];
+  if (!output) {
+    if (nonInteractive) {
+      throw new Error('Pass --output <path> to save the session artifact in non-interactive mode.');
+    }
+    const { filePath } = await promptAsync({
+      type: 'text',
+      name: 'filePath',
+      message: 'Where should the artifact be saved?',
+      initial: stripTerminalControlCharacters(path.basename(artifact.filename)),
+      validate: value => value.trim().length > 0 || 'Enter an output path.',
+    });
+    output = typeof filePath === 'string' ? filePath : undefined;
+  }
+  if (!output) {
+    throw new Error('Enter an output path.');
+  }
+  const spinner = json ? undefined : ora('Downloading session artifact').start();
+  let filePath: string;
+  try {
+    filePath = await downloadSimulatorFileAsync(output, async signal => {
+      try {
+        return await fetch(artifact.downloadUrl, { signal, timeout: 30_000 });
+      } catch {
+        throw new Error(
+          'Could not download the session artifact. Check your internet connection and try again.'
+        );
+      }
+    });
+    spinner?.succeed();
+  } catch (error) {
+    spinner?.fail();
+    throw error;
+  }
+  if (json) {
+    const { id, name, filename, metadata } = artifact;
+    printJsonOnlyOutput({
+      deviceRunSessionId: session.id,
+      artifact: { id, name, filename, metadata },
+      filePath,
+    });
+  } else {
+    Log.log(
+      `Saved ${stripTerminalControlCharacters(artifact.name)} to ${stripTerminalControlCharacters(filePath)}.`
+    );
+  }
+}
@@ -0,0 +1,65 @@
+import fs from 'fs-extra';
+import { open } from 'node:fs/promises';
+import path from 'node:path';
+import { pipeline } from 'node:stream/promises';
+
+import { type Response } from '../fetch';
+
+const DOWNLOAD_TIMEOUT_MS = 10 * 60_000;
+
+export async function downloadSimulatorFileAsync(
+  output: string,
+  getResponse: (signal: AbortSignal) => Promise<Response>
+): Promise<string> {
+  const outputPath = path.resolve(output);
+  if (await fs.pathExists(outputPath)) {
+    throw new Error(
+      'The output file already exists. The command does not overwrite files. Choose another --output path.'
+    );
+  }
+  const controller = new AbortController();
+  const signal = AbortSignal.any([controller.signal, AbortSignal.timeout(DOWNLOAD_TIMEOUT_MS)]);
+  const interruptHandler = (): void => {
+    controller.abort();
+  };
+  let response: Response | undefined;
+  let created = false;
+  process.on('SIGINT', interruptHandler);
+  try {
+    response = await getResponse(signal);
+    const file = await open(outputPath, 'wx', 0o600);
+    created = true;
+    try {
+      await pipeline(response.body, file.createWriteStream(), { signal });
+    } finally {
+      await file.close();
+    }
+    return outputPath;
+  } catch (error) {
+    if (created) {
+      await fs.remove(outputPath);
+    }
+    if ((error as NodeJS.ErrnoException).code === 'EEXIST') {
+      throw new Error(
+        'The output file already exists. The command does not overwrite files. Choose another --output path.'
+      );
+    }
+    if (controller.signal.aborted) {
+      throw new Error('The download was canceled.');
+    }
+    if (signal.aborted) {
+      throw new Error(
+        'The download timed out. It did not finish within 10 minutes. Check your internet connection, then run the command again.'
+      );
+    }
+    if (!response) {
+      throw error;
+    }
+    throw new Error(
+      'Could not save the download. Check that the --output directory exists and is writable, then try again.'
+    );
+  } finally {
+    controller.abort();
+    process.removeListener('SIGINT', interruptHandler);
+  }
+}
@@ -1,7 +1,6 @@
-import { stripVTControlCharacters } from 'util';
-
 import { type DeviceRunSessionEvent, parseDeviceRunSessionEvents } from '@expo/eas-build-job';

+import { stripTerminalControlCharacters } from './utils';
 import fetch, { RequestError } from '../fetch';
 import { formatMilliseconds } from '../utils/timer';

@@ -109,12 +108,3 @@ function getScreenshotFilename(event: DeviceRunSessionEvent): string | undefined
  }
  return event.data.path.split(/[\\/]/).at(-1);
 }
-
-function stripTerminalControlCharacters(value: string): string {
-  return [...stripVTControlCharacters(value)]
-    .filter(character => {
-      const codePoint = character.codePointAt(0) ?? 0;
-      return codePoint >= 0x20 && !(codePoint >= 0x7f && codePoint <= 0x9f);
-    })
-    .join('');
-}
@@ -0,0 +1,201 @@
+import readline from 'node:readline';
+
+import { getPreviewApiAccess } from './utils';
+import { type SimulatorSession } from './artifacts';
+import fetch, { RequestError, type Response } from '../fetch';
+import { DeviceRunSessionStatus } from '../graphql/generated';
+
+const PREVIEW_API_TIMEOUT_MS = 30_000;
+// The preview server sends a heartbeat every 15 seconds, so a longer silence means the stream is gone.
+const PREVIEW_STREAM_IDLE_TIMEOUT_MS = 60_000;
+const INVALID_PREVIEW_API_URL_MESSAGE =
+  'The simulator session has an invalid preview API URL. The session reported a URL that is not a valid HTTP(S) URL. Start a new session with `eas simulator:start`.';
+const PREVIEW_STREAM_ENDED_MESSAGE =
+  "The simulator preview stream ended unexpectedly. The connection to the session's preview server closed. Run `eas simulator:get` to check that the session is still running, then run the command again.";
+const PREVIEW_DATA_NOT_FOUND_MESSAGE =
+  "The requested preview data was not found. The session's preview server does not support this request. Start a new session with `eas simulator:start`, then try again.";
+
+export type SimulatorPreview = {
+  deviceRunSessionId: string;
+  baseUrl: URL;
+  token: string;
+};
+
+type SimulatorPreviewRequestOptions = {
+  query?: Record<string, string>;
+  signal?: AbortSignal;
+  /** Message for a 404 response. Defaults to a generic message for unsupported preview data. */
+  notFoundMessage?: string;
+};
+
+export async function resolveSimulatorPreviewAsync(
+  session: SimulatorSession
+): Promise<SimulatorPreview> {
+  if (session.status !== DeviceRunSessionStatus.InProgress) {
+    throw new Error(
+      'The simulator session is not running. Live preview data is only available while a session runs. Start a new session with `eas simulator:start`.'
+    );
+  }
+  const access = session.remoteConfig ? getPreviewApiAccess(session.remoteConfig) : null;
+  if (!access) {
+    throw new Error(
+      'This simulator session does not expose a preview API. The command reads live data through the preview API, and the session did not report its URL and token. Start a new iOS session with `eas simulator:start --platform ios`.'
+    );
+  }
+  let baseUrl: URL;
+  try {
+    baseUrl = new URL(access.apiUrl);
+  } catch {
+    throw new Error(INVALID_PREVIEW_API_URL_MESSAGE);
+  }
+  if (!['https:', 'http:'].includes(baseUrl.protocol)) {
+    throw new Error(INVALID_PREVIEW_API_URL_MESSAGE);
+  }
+  // Requests send the token in a header, so keep it out of URLs that can appear in errors.
+  baseUrl.searchParams.delete('token');
+  baseUrl.hash = '';
+  return { deviceRunSessionId: session.id, baseUrl, token: access.token };
+}
+
+export async function fetchSimulatorPreviewAsync(
+  preview: SimulatorPreview,
+  route: string,
+  {
+    query,
+    signal,
+    notFoundMessage = PREVIEW_DATA_NOT_FOUND_MESSAGE,
+    accept,
+  }: SimulatorPreviewRequestOptions & { accept?: string } = {}
+): Promise<Response> {
+  const url = new URL(route, preview.baseUrl);
+  for (const [key, value] of Object.entries(query ?? {})) {
+    url.searchParams.set(key, value);
+  }
+  // Aborting closes the connection of an error response, whose body is never read.
+  const controller = new AbortController();
+  try {
+    return await fetch(url.toString(), {
+      timeout: PREVIEW_API_TIMEOUT_MS,
+      redirect: 'error',
+      signal: signal ? AbortSignal.any([signal, controller.signal]) : controller.signal,
+      headers: {
+        Authorization: `Bearer ${preview.token}`,
+        ...(accept ? { Accept: accept } : {}),
+      },
+    });
+  } catch (error) {
+    if (signal?.aborted) {
+      throw error;
+    }
+    if (error instanceof RequestError) {
+      controller.abort();
+      if (error.response.headers.get('ngrok-error-code') === 'ERR_NGROK_3200') {
+        throw new Error(
+          'The simulator preview is offline. The session may have stopped or reached its time limit. Start a new session with `eas simulator:start`.'
+        );
+      }
+      const { status } = error.response;
+      if (status === 401 || status === 403) {
+        throw new Error(
+          "The preview API refused access. It did not accept the session's preview token. Run `eas simulator:get` to check that the session is still running, then try again."
+        );
+      }
+      if (status === 404) {
+        throw new Error(notFoundMessage);
+      }
+      throw new Error(
+        `The preview API request failed (HTTP ${status}). The session's preview server returned an error. Run \`eas simulator:get\` to check that the session is still running, then try again.`
+      );
+    }
+    throw new Error(
+      "Could not connect to the simulator preview API. The request did not reach the session's preview server. Check your internet connection. Run `eas simulator:get` to check that the session is still running."
+    );
+  }
+}
+
+export async function fetchSimulatorPreviewJsonAsync<T>(
+  preview: SimulatorPreview,
+  route: string,
+  options: Omit<SimulatorPreviewRequestOptions, 'signal'> = {}
+): Promise<T> {
+  const response = await fetchSimulatorPreviewAsync(preview, route, {
+    ...options,
+    accept: 'application/json',
+  });
+  try {
+    return (await response.json()) as T;
+  } catch {
+    throw new Error(
+      'Could not read the simulator preview API response. The response was incomplete or not valid JSON. Try again.'
+    );
+  }
+}
+
+/**
+ * Calls `onData` with each server-sent event's data until `signal` aborts. The stream ending is an error.
+ * Errors thrown by `onData` stop the stream and are rethrown unchanged.
+ */
+export async function streamSimulatorPreviewAsync(
+  preview: SimulatorPreview,
+  route: string,
+  onData: (data: string) => void,
+  { signal, ...options }: SimulatorPreviewRequestOptions & { signal: AbortSignal }
+): Promise<void> {
+  // Aborting closes the connection, including when the stream stops because of an error.
+  const controller = new AbortController();
+  let reading = false;
+  let onDataError: unknown;
+  let idleTimer: NodeJS.Timeout | undefined;
+  const resetIdleTimer = (): void => {
+    clearTimeout(idleTimer);
+    idleTimer = setTimeout(() => {
+      controller.abort();
+    }, PREVIEW_STREAM_IDLE_TIMEOUT_MS);
+  };
+  try {
+    const response = await fetchSimulatorPreviewAsync(preview, route, {
+      ...options,
+      signal: AbortSignal.any([signal, controller.signal]),
+      accept: 'text/event-stream',
+    });
+    if (!response.headers.get('content-type')?.includes('text/event-stream')) {
+      throw new Error(
+        'This simulator session does not support streaming. Its preview server did not return an event stream. Run the command without --follow.'
+      );
+    }
+    reading = true;
+    resetIdleTimer();
+    let data: string[] = [];
+    for await (const line of readline.createInterface({
+      input: response.body,
+      crlfDelay: Infinity,
+    })) {
+      resetIdleTimer();
+      if (line === '' && data.length > 0) {
+        const frame = data.join('\n');
+        data = [];
+        try {
+          onData(frame);
+        } catch (error) {
+          onDataError = error;
+          throw error;
+        }
+      } else if (line.startsWith('data:')) {
+        data.push(line.slice(5).replace(/^ /, ''));
+      }
+    }
+    // The server keeps the stream open while the session runs, so a clean end is unexpected too.
+    throw new Error(PREVIEW_STREAM_ENDED_MESSAGE);
+  } catch (error) {
+    if (signal.aborted) {
+      return;
+    }
+    if (!reading || error === onDataError) {
+      throw error;
+    }
+    throw new Error(PREVIEW_STREAM_ENDED_MESSAGE);
+  } finally {
+    clearTimeout(idleTimer);
+    controller.abort();
+  }
+}
@@ -1,4 +1,5 @@
 import chalk from 'chalk';
+import { stripVTControlCharacters } from 'util';

 import {
  AppPlatform,
@@ -655,3 +656,54 @@ function formatControllerInstructions(
      ].join('\n');
  }
 }
+
+// Session text is untrusted, so strip terminal escape and control characters before printing it.
+export function stripTerminalControlCharacters(
+  value: string,
+  { keepNewlinesAndTabs = false }: { keepNewlinesAndTabs?: boolean } = {}
+): string {
+  return stripVTControlCharacters(value).replace(/\p{Cc}/gu, character =>
+    keepNewlinesAndTabs && (character === '\n' || character === '\t') ? character : ''
+  );
+}
+
+export function isValidLogTime(at: unknown): at is number {
+  return typeof at === 'number' && !Number.isNaN(new Date(at).getTime());
+}
+
+export function formatLogLine(raw: string, timestamp = false, at = Date.now()): string {
+  const time = new Date(isValidLogTime(at) ? at : Date.now()).toISOString();
+  try {
+    const entry = JSON.parse(raw) as {
+      timestamp?: string;
+      processImagePath?: string;
+      processID?: number;
+      eventMessage?: string;
+      messageType?: string | number;
+    };
+    if (typeof entry.eventMessage === 'string') {
+      const prefix = timestamp
+        ? `${chalk.dim(stripTerminalControlCharacters(entry.timestamp ?? time))}  `
+        : '';
+      const processName = entry.processImagePath?.split('/').at(-1) ?? 'unknown';
+      const processId = typeof entry.processID === 'number' ? `:${entry.processID}` : '';
+      const processLabel = chalk.cyan(
+        stripTerminalControlCharacters(`[${processName}${processId}]`)
+      );
+      const level = String(entry.messageType ?? '').toLowerCase();
+      let message = stripTerminalControlCharacters(entry.eventMessage, {
+        keepNewlinesAndTabs: true,
+      });
+      if (level === 'error' || level === '16') {
+        message = chalk.red(message);
+      } else if (level === 'fault' || level === '17') {
+        message = chalk.red.bold(message);
+      } else if (level === 'debug' || level === '2') {
+        message = chalk.dim(message);
+      }
+      return `${prefix}${processLabel} ${message}`;
+    }
+  } catch {}
+  const prefix = timestamp ? `${chalk.dim(time)}  ` : '';
+  return `${prefix}${stripTerminalControlCharacters(raw, { keepNewlinesAndTabs: true })}`;
+}
@@ -1,5 +1,9 @@
 # @expo/eas-json

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 ### Minor Changes
@@ -1,6 +1,6 @@
 {
  "name": "@expo/eas-json",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "description": "A library for interacting with eas.json",
  "homepage": "https://github.com/expo/eas-cli",
  "bugs": "https://github.com/expo/eas-cli/issues",
@@ -32,7 +32,7 @@
  },
  "dependencies": {
    "@babel/code-frame": "7.23.5",
-    "@expo/eas-build-job": "26.0.0",
+    "@expo/eas-build-job": "27.0.0",
    "chalk": "4.1.2",
    "env-string": "1.0.1",
    "fs-extra": "11.2.0",
@@ -1,5 +1,9 @@
 # eas-cli-local-build-plugin

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "eas-cli-local-build-plugin",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "description": "Tool for running EAS compatible builds on a local machine.",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
@@ -26,12 +26,12 @@
    "clean": "rimraf node_modules dist coverage \"*.tsbuildinfo\""
  },
  "dependencies": {
-    "@expo/build-tools": "26.0.0",
+    "@expo/build-tools": "27.0.0",
    "@expo/bunyan": "^4.0.1",
-    "@expo/eas-build-job": "26.0.0",
-    "@expo/logger": "26.0.0",
+    "@expo/eas-build-job": "27.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/spawn-async": "^1.7.2",
-    "@expo/turtle-spawn": "26.0.0",
+    "@expo/turtle-spawn": "27.0.0",
    "chalk": "4.1.2",
    "env-paths": "^2.2.1",
    "fs-extra": "^11.2.0",
@@ -1,5 +1,9 @@
 # @expo/logger

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "@expo/logger",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
  "author": "Expo <[email protected]>",
@@ -1,5 +1,9 @@
 # @expo/steps

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 ### Patch Changes
@@ -1,6 +1,6 @@
 {
  "name": "@expo/steps",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
  "author": "Expo <[email protected]>",
@@ -27,8 +27,8 @@
    "clean": "rimraf node_modules dist coverage \"*.tsbuildinfo\""
  },
  "dependencies": {
-    "@expo/eas-build-job": "26.0.0",
-    "@expo/logger": "26.0.0",
+    "@expo/eas-build-job": "27.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/spawn-async": "^1.7.2",
    "arg": "^5.0.2",
    "fast-glob": "^3.3.2",
@@ -1,5 +1,9 @@
 # @expo/template-file

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "@expo/template-file",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
  "author": "Expo <[email protected]>",
@@ -1,5 +1,9 @@
 # @expo/turtle-spawn

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 No changes in this release.
@@ -1,6 +1,6 @@
 {
  "name": "@expo/turtle-spawn",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "bugs": "https://github.com/expo/eas-cli/issues",
  "license": "BUSL-1.1",
  "author": "Expo <[email protected]>",
@@ -25,7 +25,7 @@
    "clean": "rimraf node_modules dist coverage \"*.tsbuildinfo\""
  },
  "dependencies": {
-    "@expo/logger": "26.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/spawn-async": "^1.7.2"
  },
  "devDependencies": {
@@ -1,5 +1,9 @@
 # @expo/worker

+## 27.0.0
+
+No changes in this release.
+
 ## 26.0.0

 ### Patch Changes
@@ -1,6 +1,6 @@
 {
  "name": "@expo/worker",
-  "version": "26.0.0",
+  "version": "27.0.0",
  "private": true,
  "scripts": {
    "start": "yarn watch",
@@ -19,17 +19,17 @@
  },
  "dependencies": {
    "@babel/core": "7.24.7",
-    "@expo/build-tools": "26.0.0",
+    "@expo/build-tools": "27.0.0",
    "@expo/config-plugins": "55.0.7",
    "@expo/config-types": "55.0.5",
-    "@expo/eas-build-job": "26.0.0",
-    "@expo/logger": "26.0.0",
+    "@expo/eas-build-job": "27.0.0",
+    "@expo/logger": "27.0.0",
    "@expo/results": "1.0.0",
    "@expo/rudder-sdk-node": "1.1.1",
    "@expo/spawn-async": "1.7.2",
-    "@expo/steps": "26.0.0",
-    "@expo/template-file": "26.0.0",
-    "@expo/turtle-spawn": "26.0.0",
+    "@expo/steps": "27.0.0",
+    "@expo/template-file": "27.0.0",
+    "@expo/turtle-spawn": "27.0.0",
    "@hapi/boom": "10.0.1",
    "check-disk-space": "3.4.0",
    "fast-glob": "3.3.2",
@@ -2515,24 +2515,24 @@ __metadata:
  languageName: node
  linkType: hard

-"@expo/build-tools@npm:26.0.0, @expo/build-tools@workspace:packages/build-tools":
+"@expo/build-tools@npm:27.0.0, @expo/build-tools@workspace:packages/build-tools":
  version: 0.0.0-use.local
  resolution: "@expo/build-tools@workspace:packages/build-tools"
  dependencies:
    "@expo/config": "npm:55.0.10"
    "@expo/config-plugins": "npm:55.0.7"
-    "@expo/downloader": "npm:26.0.0"
-    "@expo/eas-build-job": "npm:26.0.0"
+    "@expo/downloader": "npm:27.0.0"
+    "@expo/eas-build-job": "npm:27.0.0"
    "@expo/env": "npm:^0.4.0"
-    "@expo/logger": "npm:26.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/package-manager": "npm:1.9.10"
    "@expo/plist": "npm:^0.3.5"
    "@expo/repack-app": "npm:~0.9.0"
    "@expo/results": "npm:^1.0.0"
    "@expo/spawn-async": "npm:1.7.2"
-    "@expo/steps": "npm:26.0.0"
-    "@expo/template-file": "npm:26.0.0"
-    "@expo/turtle-spawn": "npm:26.0.0"
+    "@expo/steps": "npm:27.0.0"
+    "@expo/template-file": "npm:27.0.0"
+    "@expo/turtle-spawn": "npm:27.0.0"
    "@expo/xcpretty": "npm:^4.3.1"
    "@ngrok/ngrok": "npm:1.7.0"
    "@sentry/node": "npm:7.77.0"
@@ -2768,7 +2768,7 @@ __metadata:
  languageName: node
  linkType: hard

-"@expo/downloader@npm:26.0.0, @expo/downloader@workspace:packages/downloader":
+"@expo/downloader@npm:27.0.0, @expo/downloader@workspace:packages/downloader":
  version: 0.0.0-use.local
  resolution: "@expo/downloader@workspace:packages/downloader"
  dependencies:
@@ -2784,13 +2784,13 @@ __metadata:
  languageName: unknown
  linkType: soft

-"@expo/eas-build-job@npm:26.0.0, @expo/eas-build-job@workspace:packages/eas-build-job":
+"@expo/eas-build-job@npm:27.0.0, @expo/eas-build-job@workspace:packages/eas-build-job":
  version: 0.0.0-use.local
  resolution: "@expo/eas-build-job@workspace:packages/eas-build-job"
  dependencies:
-    "@expo/logger": "npm:26.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/results": "npm:1.0.0"
-    "@expo/turtle-spawn": "npm:26.0.0"
+    "@expo/turtle-spawn": "npm:27.0.0"
    "@types/jest": "npm:^29.5.12"
    "@types/node": "npm:22.20.5"
    jest: "npm:^29.7.0"
@@ -2803,12 +2803,12 @@ __metadata:
  languageName: unknown
  linkType: soft

-"@expo/eas-json@npm:26.0.0, @expo/eas-json@workspace:packages/eas-json":
+"@expo/eas-json@npm:27.0.0, @expo/eas-json@workspace:packages/eas-json":
  version: 0.0.0-use.local
  resolution: "@expo/eas-json@workspace:packages/eas-json"
  dependencies:
    "@babel/code-frame": "npm:7.23.5"
-    "@expo/eas-build-job": "npm:26.0.0"
+    "@expo/eas-build-job": "npm:27.0.0"
    "@tsconfig/node22": "npm:22.0.6"
    "@types/babel__code-frame": "npm:7.0.3"
    "@types/fs-extra": "npm:11.0.4"
@@ -2931,7 +2931,7 @@ __metadata:
  languageName: node
  linkType: hard

-"@expo/logger@npm:26.0.0, @expo/logger@workspace:packages/logger":
+"@expo/logger@npm:27.0.0, @expo/logger@workspace:packages/logger":
  version: 0.0.0-use.local
  resolution: "@expo/logger@workspace:packages/logger"
  dependencies:
@@ -3131,12 +3131,12 @@ __metadata:
  languageName: node
  linkType: hard

-"@expo/steps@npm:26.0.0, @expo/steps@workspace:packages/steps":
+"@expo/steps@npm:27.0.0, @expo/steps@workspace:packages/steps":
  version: 0.0.0-use.local
  resolution: "@expo/steps@workspace:packages/steps"
  dependencies:
-    "@expo/eas-build-job": "npm:26.0.0"
-    "@expo/logger": "npm:26.0.0"
+    "@expo/eas-build-job": "npm:27.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/spawn-async": "npm:^1.7.2"
    "@jest/globals": "npm:^29.7.0"
    "@types/jest": "npm:^29.5.12"
@@ -3162,7 +3162,7 @@ __metadata:
  languageName: unknown
  linkType: soft

-"@expo/template-file@npm:26.0.0, @expo/template-file@workspace:packages/template-file":
+"@expo/template-file@npm:27.0.0, @expo/template-file@workspace:packages/template-file":
  version: 0.0.0-use.local
  resolution: "@expo/template-file@workspace:packages/template-file"
  dependencies:
@@ -3185,11 +3185,11 @@ __metadata:
  languageName: node
  linkType: hard

-"@expo/turtle-spawn@npm:26.0.0, @expo/turtle-spawn@workspace:packages/turtle-spawn":
+"@expo/turtle-spawn@npm:27.0.0, @expo/turtle-spawn@workspace:packages/turtle-spawn":
  version: 0.0.0-use.local
  resolution: "@expo/turtle-spawn@workspace:packages/turtle-spawn"
  dependencies:
-    "@expo/logger": "npm:26.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/spawn-async": "npm:^1.7.2"
    "@types/jest": "npm:^29.5.12"
    "@types/node": "npm:22.20.5"
@@ -3205,17 +3205,17 @@ __metadata:
  resolution: "@expo/worker@workspace:packages/worker"
  dependencies:
    "@babel/core": "npm:7.24.7"
-    "@expo/build-tools": "npm:26.0.0"
+    "@expo/build-tools": "npm:27.0.0"
    "@expo/config-plugins": "npm:55.0.7"
    "@expo/config-types": "npm:55.0.5"
-    "@expo/eas-build-job": "npm:26.0.0"
-    "@expo/logger": "npm:26.0.0"
+    "@expo/eas-build-job": "npm:27.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/results": "npm:1.0.0"
    "@expo/rudder-sdk-node": "npm:1.1.1"
    "@expo/spawn-async": "npm:1.7.2"
-    "@expo/steps": "npm:26.0.0"
-    "@expo/template-file": "npm:26.0.0"
-    "@expo/turtle-spawn": "npm:26.0.0"
+    "@expo/steps": "npm:27.0.0"
+    "@expo/template-file": "npm:27.0.0"
+    "@expo/turtle-spawn": "npm:27.0.0"
    "@hapi/boom": "npm:10.0.1"
    "@types/babel__core": "npm:7.20.5"
    "@types/fs-extra": "npm:11.0.4"
@@ -10099,7 +10099,7 @@ __metadata:
  resolution: "create-eas-build-function@workspace:packages/create-eas-build-function"
  dependencies:
    "@expo/package-manager": "npm:1.9.10"
-    "@expo/steps": "npm:26.0.0"
+    "@expo/steps": "npm:27.0.0"
    "@jest/globals": "npm:^29.7.0"
    "@types/jest": "npm:^29.5.12"
    "@types/node": "npm:22.20.5"
@@ -10683,12 +10683,12 @@ __metadata:
  version: 0.0.0-use.local
  resolution: "eas-cli-local-build-plugin@workspace:packages/local-build-plugin"
  dependencies:
-    "@expo/build-tools": "npm:26.0.0"
+    "@expo/build-tools": "npm:27.0.0"
    "@expo/bunyan": "npm:^4.0.1"
-    "@expo/eas-build-job": "npm:26.0.0"
-    "@expo/logger": "npm:26.0.0"
+    "@expo/eas-build-job": "npm:27.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/spawn-async": "npm:^1.7.2"
-    "@expo/turtle-spawn": "npm:26.0.0"
+    "@expo/turtle-spawn": "npm:27.0.0"
    "@types/fs-extra": "npm:^11.0.4"
    "@types/hapi__joi": "npm:^17.1.14"
    "@types/lodash": "npm:^4.17.4"
@@ -10742,12 +10742,12 @@ __metadata:
    "@expo/code-signing-certificates": "npm:0.0.5"
    "@expo/config": "npm:55.0.10"
    "@expo/config-plugins": "npm:55.0.7"
-    "@expo/eas-build-job": "npm:26.0.0"
-    "@expo/eas-json": "npm:26.0.0"
+    "@expo/eas-build-job": "npm:27.0.0"
+    "@expo/eas-json": "npm:27.0.0"
    "@expo/env": "npm:^1.0.0"
    "@expo/experimentation": "npm:0.0.5"
    "@expo/json-file": "npm:8.3.3"
-    "@expo/logger": "npm:26.0.0"
+    "@expo/logger": "npm:27.0.0"
    "@expo/multipart-body-parser": "npm:2.0.0"
    "@expo/osascript": "npm:2.1.4"
    "@expo/package-manager": "npm:1.9.10"
@@ -10759,7 +10759,7 @@ __metadata:
    "@expo/results": "npm:1.0.0"
    "@expo/rudder-sdk-node": "npm:1.1.1"
    "@expo/spawn-async": "npm:1.7.2"
-    "@expo/steps": "npm:26.0.0"
+    "@expo/steps": "npm:27.0.0"
    "@expo/timeago.js": "npm:1.0.0"
    "@graphql-codegen/cli": "npm:6.3.1"
    "@graphql-codegen/introspection": "npm:5.0.2"