after the last upgrade, auto save has stopped working

[yaronlevi]

Preflight Checklist

• I have read the troubleshooting guide
• I have searched existing issues and this is not a duplicate
• This is a bug with the VS Code extension, not with how Prettier formats code

Issue Summary

We are using Cursor. Happens to all the devs on the team.

Reproduction Repository

some repo

Steps to Reproduce

Just try to install the prettier extension on cursor

Expected Behavior

after the last upgrade, auto format has stopped working

Actual Behavior

after the last upgrade, auto format has stopped working

Operating System

macOS

IDE

Cursor

IDE Version

2.3.35

Prettier Extension Version

12.1.1

Prettier Version

12.1.1

Prettier Extension Logs

no logs

Prettier Configuration

after the last upgrade, auto format has stopped working

[github-actions]

Reproduction Repository Required

Thanks for opening this issue! To help us investigate, we need a reproduction repository.

Why we need this

Most issues are configuration-specific. Without a repo we can clone and test, we usually cannot diagnose the problem.

How to create a reproduction

1. Create a new public GitHub repository
2. Add the minimum files needed to reproduce the issue
3. Include a .prettierrc or other config files you're using
4. Edit this issue and add the repository link

Tip: The simpler the reproduction, the faster we can help!

What happens next

• With a repo: We'll investigate and respond
• Without a repo: This issue will be automatically closed in 7 days

Resources

• How to create a minimal reproduction
• Writing a good issue

[mjsarfatti]

I have the same problem.

I can't prepare a repro repo, but I found this the "Extension Host" startup logs:

2026-01-21 14:16:27.172 [info] ExtensionService#_doActivateExtension esbenp.prettier-vscode, startup: false, activationEvent: 'onStartupFinished'
2026-01-21 14:16:27.178 [error] Activating extension esbenp.prettier-vscode failed due to an error:
2026-01-21 14:16:27.178 [error] Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'vscode' imported from /Users/manus/.cursor/extensions/esbenp.prettier-vscode-12.1.1-universal/dist/extension.js
    at Object.getPackageJSONURL (node:internal/modules/package_json_reader:266:9)
    at packageResolve (node:internal/modules/esm/resolve:779:81)
    at moduleResolve (node:internal/modules/esm/resolve:865:18)
    at defaultResolve (node:internal/modules/esm/resolve:995:11)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at resolve (data:text/javascript;base64,CglleHBvcnQgYXN5bmMgZnVuY3Rpb24gcmVzb2x2ZShzcGVjaWZpZXIsIGNvbnRleHQsIG5leHRSZXNvbHZlKSB7CgkJaWYgKHNwZWNpZmllciA9PT0gJ2ZzJykgewoJCQlyZXR1cm4gewoJCQkJZm9ybWF0OiAnYnVpbHRpbicsCgkJCQlzaG9ydENpcmN1aXQ6IHRydWUsCgkJCQl1cmw6ICdub2RlOm9yaWdpbmFsLWZzJwoJCQl9OwoJCX0KCgkJLy8gRGVmZXIgdG8gdGhlIG5leHQgaG9vayBpbiB0aGUgY2hhaW4sIHdoaWNoIHdvdWxkIGJlIHRoZQoJCS8vIE5vZGUuanMgZGVmYXVsdCByZXNvbHZlIGlmIHRoaXMgaXMgdGhlIGxhc3QgdXNlci1zcGVjaWZpZWQgbG9hZGVyLgoJCXJldHVybiBuZXh0UmVzb2x2ZShzcGVjaWZpZXIsIGNvbnRleHQpOwoJfQ==:13:10)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at resolve (/Applications/Cursor.app/Contents/Resources/app/node_modules/import-in-the-middle/hook.js:333:26)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at Hooks.resolve (node:internal/modules/esm/hooks:240:30)

Does this help?

[RobHelgeson]

I think this is related to an issue I am seeing as well, here is a stack dump from cursor when it tries to initiate the plugin:

2026-01-21 08:14:11.987 [error] Activating extension esbenp.prettier-vscode failed due to an error:
2026-01-21 08:14:11.988 [error] Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'vscode' imported from /Users/rvh/.cursor/extensions/esbenp.prettier-vscode-12.1.1-universal/dist/extension.js
    at Object.getPackageJSONURL (node:internal/modules/package_json_reader:266:9)
    at packageResolve (node:internal/modules/esm/resolve:779:81)
    at moduleResolve (node:internal/modules/esm/resolve:865:18)
    at defaultResolve (node:internal/modules/esm/resolve:995:11)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at resolve (data:text/javascript;base64,CglleHBvcnQgYXN5bmMgZnVuY3Rpb24gcmVzb2x2ZShzcGVjaWZpZXIsIGNvbnRleHQsIG5leHRSZXNvbHZlKSB7CgkJaWYgKHNwZWNpZmllciA9PT0gJ2ZzJykgewoJCQlyZXR1cm4gewoJCQkJZm9ybWF0OiAnYnVpbHRpbicsCgkJCQlzaG9ydENpcmN1aXQ6IHRydWUsCgkJCQl1cmw6ICdub2RlOm9yaWdpbmFsLWZzJwoJCQl9OwoJCX0KCgkJLy8gRGVmZXIgdG8gdGhlIG5leHQgaG9vayBpbiB0aGUgY2hhaW4sIHdoaWNoIHdvdWxkIGJlIHRoZQoJCS8vIE5vZGUuanMgZGVmYXVsdCByZXNvbHZlIGlmIHRoaXMgaXMgdGhlIGxhc3QgdXNlci1zcGVjaWZpZWQgbG9hZGVyLgoJCXJldHVybiBuZXh0UmVzb2x2ZShzcGVjaWZpZXIsIGNvbnRleHQpOwoJfQ==:13:10)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at resolve (/Applications/Cursor.app/Contents/Resources/app/node_modules/import-in-the-middle/hook.js:333:26)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at Hooks.resolve (node:internal/modules/esm/hooks:240:30)

[mjsarfatti]

Switching back to 11.0.2 makes it work again.

[mjsarfatti]

btw, this is actually a duplicate of #3887