Joined September 2022
- Tweets 1,312
- Following 3
- Followers 6,018
- Likes 2,320
425 Photos and videos
Pinned Tweet
28 Oct 2025
📢Introducing ArkRegex📢
a drop in replacement for new RegExp() with types ⬇️
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Mar 4
📢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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Much more:
- select configure — query types by node kind, configure specific references
- Improved type.declare — morph-aware declarations, optionality via property values
- type.or, type.and, type.merge, type.pipe — n-ary standalone operators
- "|>" string-embeddable pipe syntax
- type.valueOf for TS enums
- string.hex string.regex keywords
- Serializable ArkErrors (flatByPath, flatProblemsByPath, toJSON)
- exactOptionalPropertyTypes config
- ES2020 Hermes compatibility
- In-docs playground
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Full announcement: arktype.io/docs/blog/2.2
I couldn't be more hyped to see what you do with it.
⚡ arktype.io/docs/intro/setup
⭐ github.com/arktypeio/arktype
👋 arktype.io/discord
If you want to support this work: github.com/sponsors/arktypei…
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Mar 4
Standard Schema validators can now be embedded directly in ArkType definitions.
Zod, Valibot, or anything else that implements the spec.
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Mar 4
@ark/json-schema — Bidirectional JSON Schema
Parse JSON Schema into ArkType Types, and convert Types to JSON Schema. Huge thanks to @TizzySaurus for building this one.
toJsonSchema() now supports configurable fallbacks, draft-07/2020-12 targets, and cyclic types. 11 granular fallback codes for handling incompatibilities your way.
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22 Dec 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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22 Dec 2025
📚 docs: arktype.io
👋 discord: arktype.io/discord
⭐ github: github.com/arktypeio/arktype
🛝 playground: arktype.io/playground
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18 Dec 2025
tools are just introspectable functions...
what if you could define them like this?🤔
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17 Dec 2025
wish TS had rust-style pattern matching?
(it already does)🪄
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17 Dec 2025
📚 match docs: arktype.io/docs/match
👋 discord: arktype.io/discord
⭐ github: github.com/arktypeio/arktype
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16 Dec 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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ArkType retweeted
16 Dec 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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ArkType retweeted
15 Dec 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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10 Dec 2025
BETRAYAL
10 Dec 2025
sounds fake but I'm starting a company with my nemesis Colin P. Zod
and our first hire is @AndaristRake
and our first product is now in beta
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9 Dec 2025
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