[Feature Request] Add support for Zod v4

[christopherschroer]

Zod v4 is now in beta. It would be great if zod-adapter supported Zod v4 when it is fully released

https://v4.zod.dev/v4

[schiller-manuel]

what is really needed for zod v4 in terms of adapter? zod v3 already supported standard schema, so the adapter was only necessary for the fallback case. is this still required?

[christopherschroer]

At the moment, I don't think that any additional changes are required other than including zod v4 as a valid peer-dependency. Right now, only v3 is allowed

[schiller-manuel]

but does zod v4 even have that catch behavior that made the adapter-fallback a necessity in v3?

[christopherschroer]

Huh...as far as I can tell, the catch behavior has been fixed and @tanstack/zod-adapter is not needed when using zod v4.

[melv-n]

Would that solve the issue of missing v4 types?

"The inferred type of 'Route' cannot be named without a reference to '../../node_modules/zod/dist/types/v4/classic/coerce'. This is likely not portable. A type annotation is necessary."

[christopherschroer]

Unless someone else can find a reason for zod-adapter to be needed when using zod v4, I am okay with closing this discussion

[jtannas]

I just took a swing at using zod/v4 now that it has gone stable.

I've found at least one change in type checking behaviour that shows up when using zod catch + search parameters + linkOptions.

Zod v4 Example:

Zod v3 of same code - no error:

Sample code:
https://stackblitz.com/edit/github-3vu33uqn?file=src%2Froutes%2F__root.tsx,src%2Froutes%2Findex.tsx