Migration from V2

V3 is a major release that requires TypeScript 6.0 or later.

TypeScript 6 aligns its defaults with the strict-by-default philosophy that this package has always followed. As a result, the base config is now leaner — options that are now TS6 defaults have been removed, and isolatedModules was dropped since it is implied by verbatimModuleSyntax.

Changes

• TypeScript 6 is required — there is no backward compatibility with TS5
• Removed strict: true — now a TS6 default
• Removed esModuleInterop: true — safe interop behavior is always on in TS6
• Removed isolatedModules: true — implied by verbatimModuleSyntax
• Removed commented-out baseUrl — deprecated in TS6

Ambient Types

TS6 defaults types to [], meaning @types/* packages are no longer auto-included. If your project depends on ambient type packages, you need to explicitly add them to your tsconfig:

{
  "extends": "@codecompose/typescript-config/base",
  "compilerOptions": {
    "types": ["node"]
  }
}

This aligns with the strict-by-default philosophy — type dependencies should be explicit.