📌 New to Kotlin Multiplatform? The Basics of Kotlin Multiplatform pathway from Android Developers walks you through adding KMP to a project and using platform-specific APIs, and shows how shared code fits into Android and iOS apps. Start here 👇 https://kotl.in/6nyqaz


Really enjoyed the talk by @sergiocarrilho.bsky.social. Strong storytelling, real-device demos, and a very pragmatic story about choosing a tech stack in a big company. I especially liked the focus on problem-solving rather than advocating for a technology www.youtube.com/watch?v=VVf6...

Kotlin folks, I need your gut feeling on this one. If `when` guards were allowed with comma-separated branches, what should this mean? A) guard applies only to Success B) guard applies to both Failed and Success This can actually impact the language design.

Continuing yesterday's topic on `copy()` visibility: In multiplatform, `public` isn't always public. To make Kotlin code visible to TypeScript/Swift, you need additional setup. And that distinction just collided with data classes. 👇 Docs: kotlinlang.org/docs/native-...

A "tiny" Kotlin design question that turned into an 8-year discussion, new default + a multi-release deprecation plan: If a data class constructor is private, should its generated `copy()` still be public?

I'm currently working on exporting `Flow` to TypeScript. The idea is to expose an async-iteration adapter, similar to Swift Export’s `asAsyncSequence()` PR: github.com/Kotlin/kotli... SwiftExport: kotlinlang.org/docs/native-...

I’ve been enjoying these neat API design tricks from @ivcanet.bsky.social. Just handy little patterns to keep in your back pocket when building your own Kotlin libraries: - Non-exhaustive enums: ivan.canet.dev/blog/2026/06... - Mandatory varargs: ivan.canet.dev/blog/2026/03...

This is legal TypeScript: function Foo {} namespace Foo {} interface Foo {} // or type Foo = … // All in one file. Thread on how it solved a Kotlin ↔ TypeScript interop problem 👇


In the next version of Kotlin/JS, the boundary between Kotlin `suspend` and TypeScript `async` gets much thinner. No Promise adapters. No ceremony.


TIL a tiny Kotlin/JVM thing while aligning behavior between JS and JVM compilers: ::topLevelFun is Function1, as expected. But it’s also KFunction0, KFunction1, and KFunction2 according to is. FunctionN knows arity, KFunctionN just vibes 🙂 pl.kotl.in/nF4b2Je2w

A friend today basically told me: “You’re doing interesting stuff around Kotlin, TypeScript, compilers, Wasm… and somehow sharing none of it.” Fair. Expect more about: - Kotlin lang/compiler - TypeScript interop - JS & Wasm targets - compiler/engineering rabbit holes

ECMAScript Excitement 🎉 This week, at its 114th meeting, TC39 advanced these proposals: 4️⃣ Atomics.pause 4️⃣ Joint iteration 3️⃣ Error stack accessor 3️⃣ Intl: Keep Trailing Zeros 3️⃣ Iterator Chunking 3️⃣ Iterator Includes 3️⃣ Iterator Join 3️⃣ RegExp Buffer Boundaries 2️⃣ Amount 2️⃣ Intl Sequence Units and... 👇

Note-takers are the unsung heroes of TC39. Without them, no progress could be made. It is right to give them thanks and praise. Here's to those who helped at this week's meeting! 🥳👏🙌 👇

Welcome the Kotlin Toolchain! #KotlinConf

Kobweb demo with @bitspittle.bsky.social !

Source maps are more exciting than ever 😉 🔶 Recently standardized! (one year ago) 🔶 An active @tc39.es Task Group 🔶 New features soon: Scopes & Range Maps Read all about it 📜 bloomberg.github.io/js-blog/post...

On Apple M3, a Linux KDE plasma desktop under Fedora Asahi Remix is now WORKING! Super excited to share this update and happy to answer any questions! Co-credits to noopwafel and Shiz. :)