# X_TYPESCRIPT_VERSION

## Means

The app declares a TypeScript older than the one x new scaffolds

## Typical cause

a package.json's typescript range admits a compiler below the scaffold's TYPESCRIPT_VERSION (packages/cli/src/templates/scaffold-repo.ts); the framework's own source and .d.ts are checked by that compiler, so typecheck and build go red on files the app never wrote — x doctor and x upgrade name each lagging manifest

## Fix

`x doctor --json` — each X_TYPESCRIPT_VERSION finding names its manifest and the bun add that moves it

[CLI and verify](/error-codes#cli-and-verify)