# What changed in @t3-oss/env-core

> 3 changes in @t3-oss/env-core 0.13 from its official release notes, upgrade guides and advisories: 1 new APIs and options. Each one cited. Sources checked 2026-10-27. HTML: https://unstale.sh/npm/@t3-oss/env-core/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## @t3-oss/env-core 0.13

### New APIs and options

- The Vercel preset now includes VERCEL_TARGET_ENV. (0.13.10) — [release notes](https://github.com/t3-oss/t3-env/releases/tag/%40t3-oss/env-core%400.13.10)

### Behavior and default changes

- The skipValidation flag now skips validation for extended presets. (0.13.9) — [release notes](https://github.com/t3-oss/t3-env/releases/tag/%40t3-oss/env-core%400.13.9)

### Fixes and other changes

- Zod imports were updated to support tree shaking in Webpack (Next.js) and esbuild. (0.13.11) — [release notes](https://github.com/t3-oss/t3-env/releases/tag/%40t3-oss/env-core%400.13.11)