After five years, I'm stepping down as team lead and member of the #rustlang library teams. It's been a wonderful time and a pleasure seeing the teams grow and evolve in these years. 1/4

Here's why we’ve replaced the original core system in Cloudflare with a new modular Rust-based proxy, replacing NGINX. https://cfl.re/482k3rm #BirthdayWeek

We reduced Cloudflare Workers cold starts by 10x by optimistically routing to servers with already-loaded Workers. Learn how we did it here. https://cfl.re/3Kf8PGa #BirthdayWeek

Temporal_rs has been released!!! This is the first public release of Temporal_rs, a Rust implementation of the Temporal API powering Boa, Kiesel, V8 plus other engines. This will be shipping in Chromium soon More info in our blog post: boajs.dev/blog/2025/09...

I've been experimenting with Nitro and made a plugin for `@vitejs/plugin-rsc`-based app to be deployed anywhere. Here is an example with React Router RSC! github.com/hi-ogawa/rea...

Servo Report for Week 38 2025 Highlights from last week: - script: Allow reusing results from xpath queries - html: Check the <source> MIME type on the source set updating - layout: Make bottom table captions obey relative positioning offsets - layout: Avoid recomputing automatic inline size 1/2

In Nitro v3, you can use a simple server.ts file for global init and bring the HTTP framework you love — h3.dev, @elysiajs.com, @hono.dev, or anything else ❤️ github.com/nitrojs/nitr...

Blog post: A Mental Model for Data in UI Applications jordaneldredge.com/notes/ui-data/

This month in Servo… 📐🖼️ inline SVG rendering ↔️🖋️ OpenType variable fonts 🃏🎛️ CSS.registerProperty() 🔣🤖 TextEncoderStream 🫗⏳ Iterator map(), filter(), flatMap() servo.org/blog/2025/09...

Cap'n Web is a new open source, JavaScript-native RPC protocol for use in browsers and web servers. It provides the expressive power of Cap'n Proto, but with no schemas and no boilerplate. https://cfl.re/4gzXU5T #BirthdayWeek

With the new Spin release, we're excited to introduce wasi-grpc for Spin, written by one of our engineers, Brian Hardock www.fermyon.com/blog/introdu...

SvelteKit async SSR has landed! The future of Svelte is now here. Try it out along with the new remote functions! See the PR for some unfinished rough edges. Work continues on it while it's behind an experimental flag, but you can now play around with it! github.com/sveltejs/kit...

TypeScript excitement 😉 TS 6.0 will enable "noUncheckedSideEffectImports" by default 🎉 This increases type safety by erroring if you try to import a non-existent file. Thanks for @arnaud-barre.bsky.social for pitching & @searyanc.dev for manually coding the PR 👍 github.com/microsoft/Ty...

New blog post on implementing type narrowing! kaleidawave.github.io/posts/implem...

Seeing the impact of my performance efforts in the wild really makes my day github.com/captbaritone...

React server components are great if your backend is Node and your rendering for the web. But what about native clients? Grats is great for this: Define your data using models for RSC, then simply annotate those same models so that your native clients can consume the same data via GraphQL.

Been working with @pi0.io on a great DX for the upcoming v3 of @nitro.build Stay tuned ⚡︎

First Cilium became the default for every major cloud provider’s Kubernetes distribution. Now it’s the first and only CNI certified across the entire Red Hat ecosystem. Home lab, cloud, on premise, what else is left for Cilium to become the standard?

The hardest part is it is difficult to really sell people on these more subtle features. The impact is important but it is less noticeable. But thankfully these things aren't mutually exclusive.

Yarn 4.10 is fresh off the press! 💫 It includes a new npmMinimalAgeGate setting, catalog support, and OIDC publishing.

React created multiple async UI threads in a single browser JS thread and people are out here saying it’s not innovating?

Missed out on GraphQLConf? The Guild have written up some of the highlights and key takeaways! Spec release, input unions, correct fragment usage, errors and nullability, federation interoperability, and more - check it out: the-guild.dev/graphql/hive...

These developers believed in Zed enough to contribute their time and expertise for months. We're honored they're now our colleagues: zed.dev/blog/hired-t...

@valibot.dev's mental modal is great because it consists of only 3 major building blocks… ✅ Methods help you modify or use a schema ✅ Schemas validate a specific data type ✅ Actions validate or transform a known data type

🚀 After eight months of hard work, we removed the Rust engine binaries from Prisma ORM! Here's why: 😍 Reduced bundle size by ~90% ⚡️ Faster queries (on avg ~3.48x faster in our benchmark) 🐾 Lower CPU footprint 💡 Less deployment complexity 🤝 Easier open-source contributions

Signals aren't about performance Push/Pull architecture forces better data understanding 🛰️ Signal: state getter/setter 📡 Subscriber: anything w/ a signal getter inside 💻 Derived Signal: compute + getter from other signal, 🤖 Effect: a side-effect from one or more signals,

LogTape 1.1.0 is out! This release brings “fingers crossed” logging—buffer debug logs quietly, then get the full context when errors occur. Plus a new emit() API for integrating external log sources. Check it out:

⚡ Speaker highlight: James Opstad, Engineer at @cloudflare.social Nobody wants differences in dev and prod! James will show us how the Cloudflare @vite.dev plugin uses the new Environment API to solve this issue. Learn how framework and platform plugins work together through a shared contract!

Every #CLI tool has the same validation code hidden somewhere: • “option A requires option B” • “can't use X and Y together” • “this only works in production mode” I got tired of writing it. So I built something that makes it unnecessary. #TypeScript

lfg! github.com/facebook/rea... for the first time, there will be a first-class way to tell React to deprioritize some part of the tree, an alternative to unmounting.

A new release of #Optique, a type-safe combinatorial #CLI parser for #TypeScript: Optique 0.4.0—better help, rich docs, and #Temporal support.

I'm still not particularly happy about passkeys and figured I might want to share my thoughts on why. lucumr.pocoo.org/2025/9/2/pas...

Servo Report for Week 34 2025 - Add font variations support for Windows and macOS - Add support for format(*-variations) to @font-face - Implement CSS font-variation-settings property for FreeType platforms - layout: Stop making <video> fall back to a preferred aspect ratio of 2 1/2

👀 github.com/graphql/grap...

Released Optique 0.3.0 with dependent options and flexible parser composition, shaped by real-world feedback from migrating Fedify from Cliffy.

Another milestone unlocked for Servo: inline SVG support has now landed 🎉 github.com/servo/servo/...

⚡ Speaker highlight: Atila Fassina, @solidjs.com core team member Since last ViteConf a lot changed: @nitro.build got more powerful, and TanStack Start made waves. All of that had strong influence on Solid’s meta framework @atila.io will explain the consequences and what improvements this unlocked!

🚀 New in Zed: Bring your own agent, starting with Gemini CLI (@developers.google.com). → Try Gemini CLI with full code context in Zed → Build & run multiple agents in your editor → Powered by the new Agent Client Protocol (ACP) Learn more:

New blog post: Bringing parser combinators to #TypeScript CLI parsing with Optique • Compose parsers like or(option("-a"), option("-b")) • TypeScript infers discriminated unions automatically • Inspired by Haskell's optparse-applicative

We're thrilled to welcome Atila Fassina (‪@atila.io) to the SolidJS Core Team as the SolidStart Team Lead! 🎉 1/3

Make your core features plugins, to validate that you have a powerful and well designed plugin API.

Servo Report for Week 33 2025 - Multiple improvements to Trusted Types - layout: Set color and text decoration on <select> elements by default - script: Properly fire input events for clipboard use in input elements - devtools: Show clients where they can set breakpoints 1/2

TypeScript excitement 😉 TS 6.0 is planning a bunch of breaking changes to tsconfig options to deprecate some and change the defaults for others. This will simplify configuration and ease the transition to the Go-based TS 7.0 👍 The latest pitch is to enable strict type-checking modes by default 🎉

This month in Servo… 🎞️📽️ APNG and WebP animations 🚄🎨 GPU-accelerated 2D <canvas> 📌🧰 pin servoshell to your taskbar 🧈↕️ smooth and sturdy scrolling ⏱️🌐 more info in the Network tab servo.org/blog/2025/08...

Open source projects I'm currently maintaining: * Fedify, an ActivityPub server framework for TypeScript * Hollo, an ActivityPub-enabled single-user microblogging software * BotKit, an ActivityPub bot framework for TypeScript * LogTape, a modern logging library for TypeScript * Upyo […]

View Transitions are enabled by default in Firefox Nightly, so they're on their way to stable. Give it a test with your current transitions, and give me a shout if anything doesn't look right.

Apollo Client 4.0 is officially out! Take a look at the release notes here: github.com/apollographq...

I've recently been working on Optique, a CLI parser combinator for TypeScript. Optique allows you to describe complex CLIs by combining smaller parts. You can also handle the CLI parsing results in a type-safe manner (see code below). optique.dev

taze now includes npm provenance downgrade checks to help prevent attacks similar to those previously experienced by Rspack.

I've recently been working on Optique, a CLI parser _combinator_ for TypeScript. Optique allows you to describe complex CLIs by combining smaller parts. You can also handle the CLI parsing results in a type-safe manner (see code below). The idea came from […] [Original post on hollo.social]