Kotlin Weekly (Articles)

Discontinuing Swift Language IDE Support in the Kotlin Multiplatform Plugin

Sun, 11 Oct 2026 00:00:00 GMT

JetBrains is dropping Swift editing, highlighting and navigation from the Kotlin Multiplatform plugin starting with IntelliJ IDEA 2026.3, while iOS running and debugging stays fully supported, citing low and declining usage of the features.

Start Your Next KMP App With Kotlin Toolchain 0.13

Sun, 11 Oct 2026 00:00:00 GMT

Kotlin Toolchain 0.13 is now JetBrains’ recommended starting point for new KMP projects, adding kotlin new, SwiftPM imports, smoother iOS setup and Kotlin/Native compiler caches for faster rebuilds.

Run one Maestro flow in every language: iOS launch arguments, Android per-app locales, and the traps

Sun, 11 Oct 2026 00:00:00 GMT

Manuel Lorenzo Parejo shows how to run one Maestro flow in every language and walk through the traps that quietly leave your screenshots in English.

A weather app in one JSON file

Sun, 11 Oct 2026 00:00:00 GMT

Yuriy Zhelannov builds a weather app from a single JSON file running on BDUI Go, a Compose Multiplatform runner, and explain honestly where the demo still falls short.

Coroutines Need Your Cooperation

Sun, 11 Oct 2026 00:00:00 GMT

Ricardo Costeira walks through the coroutine cancellation mistakes he sees most in interviews, from swallowed CancellationExceptions and runCatching to stray launches that break structured concurrency, and shows how to fix each one.

How I Built Free and Full Build Flavors for Android in My KMP Codebase

Sun, 11 Oct 2026 00:00:00 GMT

Avik Sharma Chowdhury uses Android product flavors in his KMP app so the free build leaves sign-in, sync and payment code out entirely, with shared interfaces, flavor-specific Koin modules and a CI check to keep it that way.

Wrapping a Swift Package in a Gradle Module: How RevenueCat's KMP SDK Builds purchases-ios Without CocoaPods

Sun, 11 Oct 2026 00:00:00 GMT

Jaewoong Eum explains how RevenueCat’s KMP SDK dropped CocoaPods and now compiles purchases-ios from source inside Gradle modules, covering the Swift build tasks, the source hash that keeps cinterop honest, and the shims around what cinterop can’t see.

Designing Safer API Failover in an Android App

Sun, 11 Oct 2026 00:00:00 GMT

Erfan Moghaddam designs API failover for an Android app with an OkHttp interceptor, centralized origin selection and a cooldown, and explains why replaying writes on another host needs far more care than switching the URL.

One Kotlin codebase, five platforms, 60 fps: building a 3D game with KMP and CMP

Sun, 11 Oct 2026 00:00:00 GMT

The BoatBrawl team share how they got their KMP and CMP 3D game to a smooth 60 fps on five platforms, from moving audio off the game loop to fixing hidden Android frame drops and online jitter, and have open-sourced the fixes as Joyframe.

Anime-style action FX in Compose Multiplatform, no shaders, one codebase

Sun, 11 Oct 2026 00:00:00 GMT

Özge Güner builds anime-style slashes, lightning, speed lines and particles in plain Compose Multiplatform with no shaders, using the open-source KMPMedia library to keep the effects deterministic at 60 fps on Android and iOS.

Kotlin Developer Survey 2026

Sun, 27 Sep 2026 00:00:00 GMT

JetBrains has opened its yearly Kotlin survey, covering the language, IDEs, build tools, libraries, Kotlin Multiplatform, documentation and AI powered workflows. It takes around fifteen minutes, and answers go into a draw for a KotlinConf 2027 pass, an All Products Pack subscription or a charity donation.

AI and Community

Sun, 27 Sep 2026 00:00:00 GMT

Nicole Terc Vega and Matthias Geisler are running a research survey on how people experience belonging to communities in tech, online and offline, and how that has been changing. There are 57 questions, so it takes 10 to 15 minutes, and it closes the 31st of October. The results are headed for next.app DevCon.

The Kotlin Effect: Join the Celebration Near You

Sun, 27 Sep 2026 00:00:00 GMT

The Kotlin Effect page keeps a list of the community meetups running for Kotlin's 15th anniversary, by date and city, from Berlin to Kaduna to Kraków. If nothing is happening near you, the section at the bottom invites you to organize one and the Kotlin user group team offers to help out.

Compose Multiplatform vs CORS

Sun, 27 Sep 2026 00:00:00 GMT

Konstantin Tskhovrebov ran into the browser refusing to let his Compose Multiplatform web app call a third party API, which is the point where most people discover CORS. His first attempt was a proxy of his own, with the TLS certificates to go with it, and that was to much for a small project. The article covers where he ended up instead.

AI Coding Agents: Adoption Trends

Sun, 27 Sep 2026 00:00:00 GMT

Mikhail Bogdanov presents what the Developer Ecosystem Survey 2026 has to say about coding agents, drawn from more than 15,000 professional developers. How many reach for one daily rather than weekly, which tools have gained ground over the year and which have lost it, and how awareness compares to actual use.

Kotlin grouped summaries: mutable seeds and weighted means

Sun, 27 Sep 2026 00:00:00 GMT

JR looks at two mistakes that quietly corrupt grouped aggregation in Kotlin, one in the seed you hand to the fold and one in the way partial averages get combined. A service latency example shows what the wrong numbers look like, with working code for both fixes and a set of checks that catch them.

Agent-to-UI Renderer for Jetpack Compose (A2UI)

Sun, 27 Sep 2026 00:00:00 GMT

Google has documented the Compose renderer for the A2UI protocol, which lets an agent put a native Android interface on screen by sending a JSON payload rather than by running arbitrary code. The page goes through how updates are applied, how you map a schema onto your own components, and what the renderer does when the agent sends something that does not validate.

Jetpack Compose Performance at Scale: Diagnosing and Fixing Cross-Module Stability Leaks

Sun, 27 Sep 2026 00:00:00 GMT

Why a data class carrying an ordinary Kotlin collection can come out unstable once it crosses a Gradle module boundary, leaving Compose to recompose on every frame when nothing has changed. The article weighs the usual remedies, annotations and wrapper types among them, against what they cost to maintain in a large codebase, and lands on one that keeps Compose out of the domain models. It also points out the case where that approach will quietly break your UI.

Kotlin Weekly (Articles)

Discontinuing Swift Language IDE Support in the Kotlin Multiplatform Plugin

Start Your Next KMP App With Kotlin Toolchain 0.13

Run one Maestro flow in every language: iOS launch arguments, Android per-app locales, and the traps

A weather app in one JSON file

Coroutines Need Your Cooperation

How I Built Free and Full Build Flavors for Android in My KMP Codebase

Wrapping a Swift Package in a Gradle Module: How RevenueCat's KMP SDK Builds purchases-ios Without CocoaPods

Designing Safer API Failover in an Android App

One Kotlin codebase, five platforms, 60 fps: building a 3D game with KMP and CMP

Anime-style action FX in Compose Multiplatform, no shaders, one codebase

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Kotlin Developer Survey 2026

AI and Community

The Kotlin Effect: Join the Celebration Near You

Compose Multiplatform vs CORS

AI Coding Agents: Adoption Trends

Kotlin grouped summaries: mutable seeds and weighted means

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Agent-to-UI Renderer for Jetpack Compose (A2UI)

Jetpack Compose Performance at Scale: Diagnosing and Fixing Cross-Module Stability Leaks

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