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ArkType @arktype.io · 04/03/2026

📢ArkType 2.2 is here. This is a big one, and it's long overdue. Validated functions, type-safe regex, bidirectional JSON Schema, and universal schema interop. Here's what's new 🧵

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ArkType @arktype.io · 22/12/2025

all you need to "learn" ArkType syntax: 1️⃣ start with a typescript keyword 2️⃣ .autocomplete to discover constraints 3️⃣ compose if needed with &, |, etc.

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ArkType @arktype.io · 18/12/2025

tools are just introspectable functions... what if you could define them like this?🤔

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ArkType @arktype.io · 17/12/2025

wish TS had rust-style pattern matching? (it already does)🪄

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ArkType @arktype.io · 16/12/2025

🚨Standard JSON Schema v1 just dropped🚨 🟢libraries can now accept ArkType wherever they need JSON Schema 🟢100% type-safe with inference built-in 🟢day one support from AI SDK 🟢TanStack AI and MCP SDK support imminent

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Reposted by ArkType

David Blass @ssalbdivad.dev · 16/12/2025

🎉Announcing Standard JSON Schema🎉 The next spec in the Standard Schema family is here to bring library-agnostic JSON Schema to TS. Let's make sure everyone sees it🔁

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Reposted by ArkType

Colin McDonnell 💎 Zod @colinhacks.com · 15/12/2025

Introducing ✨ Standard JSON Schema ✨ It's a sister spec to Standard Schema that provides a common interface for any entity that can be converted to JSON Schema

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ArkType @arktype.io · 09/12/2025

"bUt StRiNgS aReN'T tYpE sAfE"

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ArkType @arktype.io · 08/12/2025

95% of ArkType syntax is just TypeScript. The other 5% are extensions like this that are... ✅composable ✅consistent across data types ✅100% safe with helpful type-level error messages

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ArkType @arktype.io · 05/12/2025

once you go type("string") you never go z.back()

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ArkType @arktype.io · 02/12/2025

Difficulty of Parsing Regex with TypeScript Types ------------------------------------------------------------ group associativity ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ everything else ▒▒

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ArkType @arktype.io · 01/12/2025

In the next version of ArkType, any Standard Schema is a valid definition. Zod migration is about to get a whole lot easier🚀

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ArkType @arktype.io · 26/11/2025

fastest, cleanest tuple validation around

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ArkType @arktype.io · 24/11/2025

RIP z.shark() long live sharktype

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ArkType @arktype.io · 20/11/2025

friends don't let friends have unsafe regex

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ArkType @arktype.io · 19/11/2025

coming in ArkType 2.2... e(x)ec mode for regex literals🧑‍🍳

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ArkType @arktype.io · 18/11/2025

📈arkregex just hit 100k installs/week📈 if you're still using untyped RegExp() you may as well just write raw .js

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ArkType @arktype.io · 13/11/2025

string validation has never been this easy arktype🤝arkregex

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ArkType @arktype.io · 12/11/2025

problem: your RegExp is beyond human comprehension solution: pnpm i arkregex

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ArkType @arktype.io · 10/11/2025

I'll take "meticulously typed regex features you probably didn't know existed" for $500

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ArkType @arktype.io · 07/11/2025

in the latest version of arktype: regex properties and index signatures from arkregex🔒

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ArkType @arktype.io · 06/11/2025

imagine using untyped regex in 2025

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ArkType @arktype.io · 05/11/2025

arkregex is ridiculously optimized. even expressions like this are inferred instantly. but what about the most extreme cases?🧵

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ArkType @arktype.io · 03/11/2025

new RegExp(): ❌types 😴tired arkregex: ✅types 🫨wired

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ArkType @arktype.io · 28/10/2025

📢Introducing ArkRegex📢 a drop in replacement for new RegExp() with types ⬇️

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ArkType @arktype.io · 09/10/2025

new to typescript? here's a handy little type for parsing regular expressions:

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ArkType @arktype.io · 07/10/2025

🙅convoluted regex 👍simple types

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ArkType @arktype.io · 06/10/2025

the days of untyped regex are numbered

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ArkType @arktype.io · 24/09/2025

Ever get mixed up about unions and intersections? ArkType has your back🫡

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ArkType @arktype.io · 23/09/2025

"any sufficiently advanced typescript types are indistinguishable from magic" - Arthur C. Clark, 1962

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ArkType @arktype.io · 22/09/2025

Like type-safe environment variables? Now there's a better way to get them with arkenv⛵❤️

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ArkType @arktype.io · 20/09/2025

our two-step process for fast typescript types: 1️⃣ build a type-level benchmarking library 2️⃣ spend the prime of your life on cache optimizations

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ArkType @arktype.io · 17/09/2025

attest can snapshot types, type errors and autocomplete results. all from your existing unit tests📚🔗⬇️

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ArkType @arktype.io · 16/09/2025

⚠️trade offer⚠️ i receive: JSON Schema you receive: lightning-fast validation and clear errors

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ArkType @arktype.io · 11/09/2025

How to use ArkType: 1️⃣ write typescript 2️⃣ use it in editor 3️⃣ use it at runtime

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ArkType @arktype.io · 10/09/2025

turns out having type syntax at runtime is pretty nice

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ArkType @arktype.io · 09/09/2025

1️⃣ start with a typescript keyword 2️⃣ .autocomplete the rest

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ArkType @arktype.io · 08/09/2025

zod4 is 5x faster than zod3 for object validation. arktype is 20x faster than zod4.

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Reposted by ArkType

David Blass @ssalbdivad.dev · 07/09/2025

JSON Schema: Making illegal states representable since 2007

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ArkType @arktype.io · 06/09/2025

typescript is crazy

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ArkType @arktype.io · 05/09/2025

you deserve better type errors

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ArkType @arktype.io · 04/09/2025

challenge: create an unsatisfiable arktype schema difficulty: mathematically impossible

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Reposted by ArkType

David Blass @ssalbdivad.dev · 03/09/2025

you haven't lived until you've seen autocomplete for "string | n" try it in-browser 🛝🔗👇

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Reposted by ArkType

David Blass @ssalbdivad.dev · 29/08/2025

🌶️hover clarity is a huge part of typescript dx

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ArkType @arktype.io · 28/08/2025

1️⃣ type.validate 2️⃣ type.infer all your API needs to accept an ArkType definition with autocomplete, type-level errors and inference.

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