Fabian Hiller
@fabianhiller.com
Creator of @valibot.dev, creator of Formisch, co-creator of https://standardschema.dev and engineer at https://usemotion.com
🚨 Security Alert: Valibot v1.2 is out! We've fixed a critical ReDoS vulnerability in the `emoji()` action's regex that could lead to excessive CPU usage on malicious inputs.
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
November 25, 2025 at 8:36 PM
🚨 Security Alert: Valibot v1.2 is out! We've fixed a critical ReDoS vulnerability in the `emoji()` action's regex that could lead to excessive CPU usage on malicious inputs.
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
Huge thanks to Hiroya Fujinami for discovering and responsibly disclosing this—security heroes like you keep the web safer! 🙌
@valibot.dev v1.2 adds a handy new feature: `examples([…])`
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
November 25, 2025 at 4:22 PM
@valibot.dev v1.2 adds a handy new feature: `examples([…])`
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
You can now attach sample values directly to your schemas and retrieve them later. 🪄
Useful for generating docs, form placeholders, or giving AI tools concrete examples from your actual schema.
@valibot.dev v1.2 is out! This version adds powerful transformation actions for type coercion, new metadata features to improve AI tool integration, and ISBN validation for library management systems. valibot.dev/blog/valibot...
November 25, 2025 at 2:29 PM
@valibot.dev v1.2 is out! This version adds powerful transformation actions for type coercion, new metadata features to improve AI tool integration, and ISBN validation for library management systems. valibot.dev/blog/valibot...
Reposted by Fabian Hiller
Thank you @fabianhiller.com for sponsoring me on @github.com !! You can join them at my sponsors profile: github.com/sponsors/ysk...
November 25, 2025 at 1:05 PM
Thank you @fabianhiller.com for sponsoring me on @github.com !! You can join them at my sponsors profile: github.com/sponsors/ysk...
@valibot.dev v1.2 drops in a few days! 🔥
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
November 23, 2025 at 2:38 AM
@valibot.dev v1.2 drops in a few days! 🔥
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
New coercion actions just landed:
✅ toString()
✅ toNumber()
✅ toDate()
Turn messy unknown input into clean, typed values without breaking a sweat.
Thank you to everyone who tried out @formisch.dev this week! It's great to see more downloads and activity on GitHub! If you're new to the project, you can find out more in our docs: formisch.dev
Formisch: The modular and type-safe form library for any framework
Formisch is a schema-based, headless form library for JS frameworks. It manages form state and validation. It is type-safe, fast by default and its bundle size is small due to its modular design.
formisch.dev
November 22, 2025 at 8:01 PM
Thank you to everyone who tried out @formisch.dev this week! It's great to see more downloads and activity on GitHub! If you're new to the project, you can find out more in our docs: formisch.dev
Which of you are already using @zod.dev, @valibot.dev, @arktype.io or any other libraries that are compatible with standardschema.dev with @vitest.dev? What is your feedback?
Did you know that you can match against Standard Schemas in @vitest.dev?
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
November 22, 2025 at 7:53 PM
Which of you are already using @zod.dev, @valibot.dev, @arktype.io or any other libraries that are compatible with standardschema.dev with @vitest.dev? What is your feedback?
Reposted by Fabian Hiller
Did you know that you can match against Standard Schemas in @vitest.dev?
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
November 19, 2025 at 3:40 PM
Did you know that you can match against Standard Schemas in @vitest.dev?
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
With the release of Vitest 4, this is possible now. No matter if you want to match your whole data or only partials against a schema and no matter which validation library is used as long as they support Standard Schema
v-model + type-safe nested paths + zero boilerplate = Formisch for @vuejs.org
Headless. Schema-driven. Actually nice to use.
Real example ↓
Headless. Schema-driven. Actually nice to use.
Real example ↓
November 21, 2025 at 3:33 PM
v-model + type-safe nested paths + zero boilerplate = Formisch for @vuejs.org
Headless. Schema-driven. Actually nice to use.
Real example ↓
Headless. Schema-driven. Actually nice to use.
Real example ↓
From 0 to 59,721,923 monthly downloads in 11 months.
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
November 20, 2025 at 3:50 PM
From 0 to 59,721,923 monthly downloads in 11 months.
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
standardschema.dev probably became one of the fastest-growing npm packages ever built.
If you’re not using the spec yet… you’re gonna feel real silly in 2026.
There’s a lot more coming.
@colinhacks.com @ssalbdivad.dev 👀
Excited about @formisch.dev + @valibot.dev? 🧩 This schema-first duo makes building robust forms a breeze! Define your form with Valibot—get auto-inferred TS types, seamless validation with custom errors. Works out of the box with @solidjs.com, @vuejs.org, @svelte.dev, @preactjs.com and @qwik.dev.
November 20, 2025 at 3:34 PM
Excited about @formisch.dev + @valibot.dev? 🧩 This schema-first duo makes building robust forms a breeze! Define your form with Valibot—get auto-inferred TS types, seamless validation with custom errors. Works out of the box with @solidjs.com, @vuejs.org, @svelte.dev, @preactjs.com and @qwik.dev.
Just a quick note in advance: I moved @valibot.dev and @formisch.dev to a new GitHub organization called @opencircle.dev. I also renamed our Discord channel. I plan to share more information about Open Circle over the next few weeks. 🧩
November 20, 2025 at 3:42 AM
Just a quick note in advance: I moved @valibot.dev and @formisch.dev to a new GitHub organization called @opencircle.dev. I also renamed our Discord channel. I plan to share more information about Open Circle over the next few weeks. 🧩
Formisch is the form library your framework has been begging for. The docs are so good you’ll actually read them: formisch.dev
November 19, 2025 at 3:43 PM
Formisch is the form library your framework has been begging for. The docs are so good you’ll actually read them: formisch.dev
November 14, 2025 at 2:54 PM
Thrilled to welcome LambdaTest as a new partner of Valibot! LambdaTest is a cloud-based testing platform that supports cross-browser testing on 3000+ browsers and real devices, with AI-powered features for test orchestration. Thank you for supporting our open source work!
November 13, 2025 at 3:05 PM
Thrilled to welcome LambdaTest as a new partner of Valibot! LambdaTest is a cloud-based testing platform that supports cross-browser testing on 3000+ browsers and real devices, with AI-powered features for test orchestration. Thank you for supporting our open source work!
Thank you for using Valibot 🙏
October 31, 2025 at 1:36 AM
Thank you for using Valibot 🙏
👀
📢Introducing ArkRegex📢
a drop in replacement for new RegExp() with types ⬇️
a drop in replacement for new RegExp() with types ⬇️
October 28, 2025 at 7:48 PM
👀
Reposted by Fabian Hiller
💡We can hide internals with ~ instead of _ for btter DX:
October 27, 2025 at 1:12 PM
💡We can hide internals with ~ instead of _ for btter DX:
I am excited to release the documentation for my new open-source project, Formisch.dev. It's time to rewrite your forms! 😉 Next, I will look into supporting @react.dev.
Formisch: The modular and type-safe form library for any framework
Formisch is a schema-based, headless form library for JS frameworks. It manages form state and validation. It is type-safe, fast by default and its bundle size is small due to its modular design.
Formisch.dev
October 27, 2025 at 3:14 AM
I am excited to release the documentation for my new open-source project, Formisch.dev. It's time to rewrite your forms! 😉 Next, I will look into supporting @react.dev.
Vitest 4 comes with a new `expect.schemaMatching` API that uses standardschema.dev behind the scenes. Now, you can use @valibot.dev, @zod.dev, @arktype.io, etc. to test your code! This is huge! 📈
Vitest 4 is out!
- Browser Mode is Stable
- Visual Regression Testing
- Improved Debugging
- Pool Stabilization
- New APIs
- Bug Fixes
Stay updated with our blog post:
vitest.dev/blog/vitest-4
- Browser Mode is Stable
- Visual Regression Testing
- Improved Debugging
- Pool Stabilization
- New APIs
- Bug Fixes
Stay updated with our blog post:
vitest.dev/blog/vitest-4
Announcing Vitest 4.0
Vitest 4.0 Release Announcement
vitest.dev
October 25, 2025 at 8:59 PM
Vitest 4 comes with a new `expect.schemaMatching` API that uses standardschema.dev behind the scenes. Now, you can use @valibot.dev, @zod.dev, @arktype.io, etc. to test your code! This is huge! 📈
Struggling with unknown data in TypeScript? @valibot.dev parses it effortlessly: validate & transform via pipes, grab detailed issues with safeParse (no throws!), and optimize perf with the abortEarly config.
October 15, 2025 at 2:43 PM
Struggling with unknown data in TypeScript? @valibot.dev parses it effortlessly: validate & transform via pipes, grab detailed issues with safeParse (no throws!), and optimize perf with the abortEarly config.
This message is for all @valibot.dev contributors. I recently added prompts to the Valibot repository that can be referenced when adding a new API reference to the website, for example, using an AI agent. github.com/fabian-hille...
valibot/prompts at main · fabian-hiller/valibot
The modular and type safe schema library for validating structural data 🤖 - fabian-hiller/valibot
github.com
October 15, 2025 at 1:22 AM
This message is for all @valibot.dev contributors. I recently added prompts to the Valibot repository that can be referenced when adding a new API reference to the website, for example, using an AI agent. github.com/fabian-hille...
@valibot.dev infers TS types + issues from your schemas! 🔥
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
October 14, 2025 at 3:03 PM
@valibot.dev infers TS types + issues from your schemas! 🔥
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
No more boilerplate drudgery. Dive in: valibot.dev/guides/infer...
The docs for Formisch will probably be available in the next few days 🧱
October 13, 2025 at 12:40 AM
The docs for Formisch will probably be available in the next few days 🧱
Reposted by Fabian Hiller
@lgrammel https://x.com/lgrammel/status/1976644942425694511 #x-lgrammel
Latest AI SDK 6 beta supports the following validation libs:
Zod, Valibot, Arktype, Effect Schema
(Zod still needed for AI SDK-internal schemas)
Latest AI SDK 6 beta supports the following validation libs:
Zod, Valibot, Arktype, Effect Schema
(Zod still needed for AI SDK-internal schemas)
October 10, 2025 at 2:01 PM
@lgrammel https://x.com/lgrammel/status/1976644942425694511 #x-lgrammel
Latest AI SDK 6 beta supports the following validation libs:
Zod, Valibot, Arktype, Effect Schema
(Zod still needed for AI SDK-internal schemas)
Latest AI SDK 6 beta supports the following validation libs:
Zod, Valibot, Arktype, Effect Schema
(Zod still needed for AI SDK-internal schemas)