Colin McDonnell 💎 Zod

in the absence of an existing convention, I'm adding these three fields to Zod's package.json.

making this stuff auto-discoverable would resolve one of the biggest usability issues with today's agents/IDEs. a simple convention here will go a long way! 🤘

sounds like you found an alternative but the answer is "not at all". MIT license, go ham :)

very nice 🤩

Zod 4 Release Day Happy Hour · Luma Zod 4 is here! This new major version of Zod has been under development for over a year, and it’s finally going stable on May 19th. Join me to eat food, drink…

folks in the Bay Area: come hang out!
lu.ma/waqmeggb

Zod 4 Release Day Happy Hour · Luma Zod 4 is here! This new major version of Zod has been under development for over a year, and it’s finally going stable on May 19th. Join me to eat food, drink…

I'm throwing a happy hour in SF that evening to celebrate (thx @clerk.com!) — if you're any the area come hang out :) lu.ma/waqmeggb

Zod 4 stable will be released this Monday, May 19th!

hi Axel! big fan! the ? syntax definitely felt right...and when it unlocked recursive objects I knew it was the way.

though actually in Zod 4, z.object() adds the "?"to T.optional() but not to z.union(T, z.undefined()) as you're suggesting...a small change that makes things a little more sound

z.safeint() exists but it's just z.int() 🙃 anything outside of safe range will throw. hadn't considered doubleint seriously. is that basically z.int128()? I'd represent that with a ZodBigInt subclass (similar to z.int64() and z.uint64 currently). but idk if it's widely used enough to merit addition?

yikes, thanks! last minute changes gone awry

thank you! this means a lot and is exactly the reaction I was hoping for :))))

huge thanks to @clerk.com for supporting my work on Zod 4! they've been an amazing partner through the much-longer-than-expected development process 🫶

@zod/core | Zod Docs

the beta period will last 4-6 weeks so ecosystem tooling/library authors can implement day-one support. if that's you: this page is a good starting point. don’t hesitate to reach out for guidance!
v4.zod.dev/packages/core

Migration guide | Zod Docs

breakage was kept to an absolute minimum, but there are some relatively minor changes to the public API. i'd love for some brave pioneers to upgrade and report any breakage not described in the changelog:
v4.zod.dev/v4/changelog

Introducing Zod 4 beta | Zod Docs

Zod 4 is now in beta!

💎 7x faster object parsing
💎 20x reduction in tsc instantiations
💎 57% smaller core bundle size
💎 metadata via .meta()
💎 z.toJSONSchema()
💎 z.templateLiteral()
💎 z.stringbool()
💎 z.int32(), z.float32(), etc
💎 z.file()
💎 new logo 😇

if I may be so bold, I'd like to propose some much-needed nomenclature

thanks for letting me know! the docs (including this banner placement) are going to move out of the readme soon which should mitigate this. I'd be surprised if they enforce this for a solo developer though...something like CodeFund is more likely to ruffle feathers I think

i'm trying out a new OSS funding experiment—a "featured" sponsor slot at the top of the Zod README

✓ features are week-to-week (~140k impressions)
✓ simple auction-based pricing (per-week or standing bids accepted)
✓ artwork subject to approval

DM/email me if your company is interested! 🤙

who suggested this and why weren't they fired immediately

I want chain-of-thought for ChatGPT Voice Mode but it just mutters to itself for 30 seconds before answering my question

star count for Standard Schema—pretty successful launch, i'd say 🤩

thanks Corbin! I really appreciate this 😇

i might still be misunderstanding something here though 🙃

(deleted an earlier reply, I misunderstood the problem)

Zod does in fact try to avoid the Partial<> in z.record() wherever possible: github.com/colinhacks/z...

in this case it's behaving as intended. not much point in adding a question mark to an index signature since it's essentially implied.

send me the PR when its merged and I'll tweet it out!

Incredibly proud to be a part of an ecosystem as friendly and open as TypeScript's. It’s been a joy working together with my "competitors" to make something that can hopefully benefit the whole ecosystem 🤩

If you’re a maintainer interested in implementing/integrating with the spec, refer to the README for some simple integration examples, an FAQ, and links to other integrations/PRs.

If you’re having trouble, DM me and I’d be happy to help 🤙
github.com/standard-sch...

A lot of frameworks and tools already accept Standard Schemas! Huge shoutout to the early adopters: tRPC, Tanstack Form, Tanstack Router, UploadThing and t3-env, OpenAuth, Renoun, and more

🙏 @jayair.bsky.social @katt.dev @chorobin.bsky.social @jumr.dev @souporserious.com @awad.dev @unnoq.com

This makes it easier for frameworks and tools (like say, tRPC) to accept user-defined schemas, without needing separate adapters for each lib.

Integrate once, validate anywhere 🦆

This is a condensed version of the Standard Schema spec that does a good job of conveying how it works.

Given a spec-compliant validator you can:



a) validate data with it (duh)
b) retrieve validation errors in a standardized format
c) extract its inferred input & output types

Standard Schema is a specification (a TypeScript interface in fact) not a library.

It was designed collaboratively by myself (creator of Zod 👋), @fabianhiller.com (creator of Valibot), and @ssalbdivad.dev (creator of ArkType).

It’s the final form of something I tweeted nearly two years ago.