TypeScript 5.7+ compilation errors in ox@0.11.3 and ox@0.12.0

[oktapodia]

Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Ox Version

0.11.3

Current Behavior

The ox package versions 0.11.3 and 0.12.0 have TypeScript compilation errors when compiled with TypeScript 5.7+, 5.8, and 5.9. This prevents projects using viem (which depends on ox) from building successfully.

Environment:

• ox: 0.11.3 (via viem@2.45.1)
• TypeScript: 5.9.3
• Node: 20.x

Expected Behavior

viem can be upgraded without any issues

Steps To Reproduce

I've created a minimal reproduction case with automated CI: https://github.com/oktapodia/ox-typescript-bug-reproduction/actions/runs/21718442901

Repository: https://github.com/oktapodia/ox-typescript-bug-reproduction

Link to Minimal Reproducible Example

https://github.com/oktapodia/ox-typescript-bug-reproduction

Anything else?

No response

[jxom]

Strict mode needs to be enabled.

[oktapodia]

@jxom I've added a test to the reproducible example with strict mode enabled, seems to have a similar issue

https://github.com/oktapodia/ox-typescript-bug-reproduction/actions/runs/21744204289/job/62726026847

[jxom]

Can you try set module to esnext or nodenext — commonjs is quite deprecated these days. Otherwise I’ll take a look.