Kasper Peulen (@KasperPeulen) profile picture

Kasper Peulen

@KasperPeulen

🤟TypeScript fanatic | ❤️ building apps with React + Storybook | Storybook maintainer @chromaui

 The Netherlands
medium.com/@kasperpeulen
Joined May 2009
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Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)Photo by Kasper Peulen (@KasperPeulen)
Kasper Peulen retweeted
Rhys (@RhysSullivan) profile picture
Rhys
@RhysSullivanOct 5
t3 code is so much better than the labs products its not even close
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vitest-plugin-rsc 0.2.0 is released and now runs all public Next.js APIs through real Next.js code paths!
Image from Kasper Peulen (@KasperPeulen)
Kasper Peulen (@KasperPeulen) profile pictureKasper Peulen@KasperPeulenMay 12
Excited about this: got a lightweight async_hooks compatibility shim working in the browser for vitest-plugin-rsc. This should allow us run Next’s real cookies() and headers() request-context code in browser-mode RSC tests, without mocking those APIs. @kettanaito
Image from Kasper Peulen (@KasperPeulen)
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Check it out! github.com/storybookjs/vites…
GitHub - storybookjs/vitest-plugin-rsc: Render React Server Components in Vitest Browser Mode.

GitHub - storybookjs/vitest-plugin-rsc: Render React Server Components in Vitest Browser Mode.

Render React Server Components in Vitest Browser Mode. - storybookjs/vitest-plugin-rsc

github.com
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Excited about this: got a lightweight async_hooks compatibility shim working in the browser for vitest-plugin-rsc. This should allow us run Next’s real cookies() and headers() request-context code in browser-mode RSC tests, without mocking those APIs. @kettanaito
Image from Kasper Peulen (@KasperPeulen)
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Kasper Peulen retweeted
DHH (@dhh) profile picture
DHH
@dhhMay 8
I've been driving GPT5.5 on low reasoning for the last week+ and it's very good, very efficient. Haven't been tempted to reach for Opus at all. And it's more succinct than Kimi too. Huge leap forward for @OpenAI 👌
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Kasper Peulen retweeted
André Staltz (@andrestaltz) profile picture
André Staltz
@andrestaltzMay 7
Cursor* is better than Claude Code. * The IDE, the cloud environment, the integration with Linear, Slack, and various other tools. And the overall experience, flexibility and productivity. I never have to worry about keeping my laptop awake.
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Kasper Peulen retweeted
Marco Ippolito (@satanacchio) profile picture
Marco Ippolito@satanacchioMay 5
With v20 going EOL, all Node.js LTS versions can run TypeScript out of the box. There is no reason to keep using plain JavaScript for new projects.
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Kasper Peulen retweeted
Julius (@jullerino) profile picture
Julius
@jullerinoMay 4
how come the best model for UI (Opus) is also the slowest. sooo annoying in an area where iteration speed is so key when trying out ideas... really like 5.5 fast but it just can't do UI 😭
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Kasper Peulen retweeted
Jonathan Wilke (@jonathan_wilke) profile picture
Jonathan Wilke
@jonathan_wilkeApr 28
I'm gonna say it: As it stands today, @cursor_ai is the best agentic coding tool out there. No jumping between terminal and editor, nice UI and you don't have to switch the tool if there's a new model. change my mind.
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Fully switching from the Codex desktop app to Cursor 3. Codex is amazing, and keeps getting better, but I keep finding things where @cursor_ai is a bit or miles ahead. Well done @cursor_ai!
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Kasper Peulen retweeted
Kasper Peulen (@KasperPeulen) profile picture
Kasper Peulen@KasperPeulenApr 10
Replying to @bunjavascript
@jarredsumner When will the Claude harness start asking to use bun for everyting instead of bash. I see only adventages: * cross platform by default * easier to limit comand output then using grep etc. * easy to chain commands * faster * use typescript sdks -> mcp * etc. etc.
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Codex desktop app is so good @OpenAI. Even though I prefer Opus 4.6 over GPT 5.4, it makes me wonder if the app outweighs those Opus benefits @claudeai
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Is the epic stack gonna use RSC now @ReactRouter is supporting it?
Kent C. Dodds 🐨 (@kentcdodds) profile pictureKent C. Dodds 🐨
@kentcdodds18 Jul 2025
Replying to @jacobmparis
This is one of the best parts of RSC. It reunites the React ecosystem so the underlying framework doesn't have to reach into our code so much. Very nice.
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Published the vitest-plugin-rsc package to npm with nextjs support!
Image from Kasper Peulen (@KasperPeulen)
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The NextRouter component provides all necessary context providers.
Image from Kasper Peulen (@KasperPeulen)
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If you are interested in unit testing RSC in vitest, star the repo on github! github.com/kasperpeulen/vite…
GitHub - storybookjs/vitest-plugin-rsc: Render React Server Components in Vitest Browser Mode.

GitHub - storybookjs/vitest-plugin-rsc: Render React Server Components in Vitest Browser Mode.

Render React Server Components in Vitest Browser Mode. - storybookjs/vitest-plugin-rsc

github.com
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Kasper Peulen retweeted
Waku (@wakujs) profile picture
Waku
@wakujs5 Aug 2025
In collaboration with the @vite_js team, Waku v0.24 adopts the official Vite RSC plugin inspired by Waku’s pioneering work. This introduces a stronger foundation for Waku and empowers its maintainers to focus on new features. Check it out! ⛩️waku.gg/blog/migration-to-vi…
Migration to @vitejs/plugin-rsc — Waku

Migration to @vitejs/plugin-rsc — Waku

Waku adopts Vite's official RSC plugin and Environment API as its foundation.

waku.gg
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Adding a nextjs example to the vitest rsc plugin!
Image from Kasper Peulen (@KasperPeulen)
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github.com/kasperpeulen/vite…
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Unit testing RSC, is it possible? Some first success published here: github.com/kasperpeulen/vite…
Image from Kasper Peulen (@KasperPeulen)
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