Cursor TSServer Crash / Hanging Fix

Using Cursor (a VSCode fork) in a large Typescript monorepo project, I came across an issue where the tsserver process would crash, hang, or otherwise be excruciatingly slow.

The Output pane in Cursor would show something like this:

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2025-12-05 11:18:12.688 [info] <semantic> Starting...
2025-12-05 11:18:12.699 [info] Killing TS Server
2025-12-05 11:18:12.699 [info] Starting TS Server
2025-12-05 11:18:12.699 [info] Using tsserver from: /Applications/Cursor.app/Contents/Resources/app/extensions/node_modules/typescript/lib/tsserver.js
2025-12-05 11:18:12.699 [info] <syntax> Forking...
2025-12-05 11:18:12.699 [info] <syntax> Starting...
2025-12-05 11:18:12.699 [info] <semantic> Forking...
2025-12-05 11:18:12.699 [info] <semantic> Starting...
2025-12-05 11:18:12.703 [error] TSServer exited. Code: null. Signal: SIGTERM

I tried disabling all extensions, upgrading Cursor, clearing the cache, checking for circularity (Type instantiation is excessively deep and possibly infinite.ts(2589) was popping up suddenly), etc.

The solution I overlooked is much simpler: point the tsserver process to your workspace's tsserver.js file.

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{
    "typescript.tsdk": "node_modules/typescript/lib"
}

Or from the Typescript: Select Typescript Version command:

If still encountering issues, then you can try the other steps like Developer: Reload with Extensions Disabled, upgrading cursor, and clearing the cache.

Hope this helps.