15 years ago, this happened: github.com/JetBrains/ko... #kotlin

🎉 Ktor 3.3.2 is here! Explore the changelog to learn more. kotl.in/nf86gx

TestBalloon, the next generation Kotlin test framework, has now reached flight level 0.7.1. Please do check out its unique combination of characteristics, making it 🌋 powerful, 🚀 blazingly fast, and ☺️ so easy to use. There's a brand-new documentation site, too! github.com/infix-de/tes...

📣 Calling all Ktor users! We’d love your input! Take our annual survey and share your thoughts, challenges, and ideas to help us make the framework even better. Your feedback shapes the future of Ktor 🚀 Take the survey 👉 surveys.jetbrains.com/s3/05ddc3ebe...

@chrzanowski.info's Kotlin Notebook featuring IntelliJ Platform code: gist.github.com/hsz/cc66e84f...

There's less than a month left to submit your talk ideas to KotlinConf 2026! Why not do it today?

🏦 Trust in Kotlin across the financial technology sector is growing. Yuri Geronimus (Verifone) explains why Kotlin is becoming a strategic choice for payment systems and enterprise-scale solutions. Learn more👇 yurigeronimus.medium.com/kotlin-in-pa...

There's also a new beta Gradle plug-in to simplify the configuration of Arrow Optics arrow-kt.io/community/bl...

Arrow 2.2.0 is out! arrow-kt.io/community/bl... - Raise with context parameters - More DSLs for concurrency, - "At most once" for Eval, - New integration with Result4k

Finding Order in the Mayhem: A Novel Concurrency Testing Tool that Improved the Kotlin Compiler https://lobste.rs/s/xkziyp ##testing ##kotlin

happy halloween and wait why is kodee orange

There's a GitHub repo up on github.com/mreichelt/ko..., with some handy scripts to try these features out yourself!

Warming up for @droidcon.bsky.social London? Why not also warm up your JVMs to get faster startup times, with CRaC, Ahead-of-Time Class Loading & Linking (JEP 483) and AoT Method Profiling (JEP 515)? My Droidcon Berlin talk is now up - enjoy! www.youtube.com/watch?v=paoA...

if you see this post, your actions are: - if you have a spare buck, give it to Wikipedia, then repost this - if you don't have a spare buck, just repost your action is mandatory for the world's best source of information to survive

You can find the workshop about Pure Functions, Powerful Effects, you can find it here: jb.gg/8obvnt

Had an amazing time at #LambdaWorld 25! Gave 2 workshops with @serranofp.com about @kotlinlang.org. Had great chats about Kotlin not the server, for FP, Kotlin Notebooks, @jetbrains.com and @intellijidea.com 😍 You can find the workshops here: jb.gg/tj9qf6 Hope to see you all next year!

It’s Lamda World today and tomorrow and I brought Kodee!! Come to @serranofp.com and my workshop today, or swing by the @kotlinlang.org @jetbrains.com booth tomorrow and come say hi! Hope to see you there!

JetBrains Plugin Developer Conf returns this November! Join JetBrains experts and plugin developers for a full day of inspiring talks, live Q&A sessions, and deep dives into the latest in plugin development. 🗓️ November 5 | 10:00 am CET 💻 Online 💸 Free Register 👉 jb.gg/PluginDevelo...

A conversation around Kotlin coroutines 💜 @sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth. 🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...

🚀 Dokka 2.1.0 is out! This version focuses on stabilizing experimental features, supporting new Kotlin language updates, and improving the user experience. 🔗 Check out the details: https://github.com/Kotlin/dokka/releases/tag/v2.1.0 We'd really appreciate your feedback!

🚀 Koog 0.5.0 is here! In addition to full A2A support, this release introduces: 💡 New non-graph API for strategies 🛠️ Tool API upgrades 🔁 Stronger agent persistence ✨ And more! Dive into what’s new: https://jb.gg/m5t46p

Junie is perfect for something like this (in a #KMP project).....it added Android, iOS and JVM implementations (using expect/actual) and also updated the tests.

I've written a small blog post about how context parameters change API design in Kotlin serranofp.com/blog/context... Feedback and discussion is more than welcome!

Because obviously what the world was missing was yet another manifesto, I proudly present: The Agents Manifesto — a survival guide for working with AI without losing your sanity. Coming soon to a stone tablet near you. antonarhipov.github.io/agents-manif...

For your weekend #Devoxx playlist: Be more productive with @intellijidea.com, by yours truly www.youtube.com/watch?v=ZWec...

This year’s Kotlin Multiplatform Contest for students and recent graduates is open. Build a project using KMP, and it could take you to KotlinConf 2026 in Munich, Germany! 👉 https://kotlinconf.com/contest/

🎉 JUnit 6.0 is here, and it brings even deeper Kotlin support! Now, you get: ✨ Suspend and cancellation support ✨ Kotlin 2.2 baseline ✨ Improved nullability annotations ✨ Convenient UX with contracts Check out the full release notes 👉 kotl.in/b8wncm?utm_c...

Build a Kotlin Multiplatform Project and Win a Trip to KotlinConf 2026 blog.jetbrains.com/kotlin/2025/... For students and recent graduates.

Building a #SpringFramework application with #Koog agents by @vadim-briliantov.bsky.social #Devoxx

🎙️ Spoke at #Devoxx about making #AI agents truly fault-tolerant and recoverable with #Koog — #JetBrains’ open-source framework for resilient #JVM + #Kotlin AI systems. Also showed how to integrate Koog agents into #Spring/#SpringBoot apps. 🎥 Full talk: youtu.be/2l1GBp80CbY

Hi @devoxx.com! I’m at the @jetbrains.com booth this week. Be sure to come say hi if you want to hear about Kotlin! 😬

⚡ Want to increase the speed of your iOS builds? Try incremental compilation for Kotlin/Native, by adding this to your Gradle properties: kotlin.incremental.native=true This is an experimental feature, and we'd love to hear your feedback. Learn more 👉 https://kotl.in/t37r88

Published a KEEP on suspend lambdas and anonymous functions: github.com/Kotlin/KEEP/...

Better immutability in Kotlin with Valhalla www.youtube.com/watch?v=6jam... #kotlin #programming #jvm #jvmls

We now have a dedicated Bluesky account! In the coming weeks we'll be automating release announcements there.

The #Kotlin Multiplatform #MongoDB driver has made its first request!

🎉 The Ktor @opentelemetry.io integration doc is now live - ktor.io/docs/server-... #kotlin #otel

The Ktor roadmap for 2025–26 is here! Here's what we'll be working on: 🔶 API docs (OpenAPI is already in preview) 🔶 WebRTC Client with a Multiplatform API 🔶 Integration with Koog, the @jetbrains.com framework for building AI agents Explore what’s next 👇 blog.jetbrains.com/kotlin/2025/...

Your First AI Agent in Kotlin | Tutorial www.youtube.com/watch?v=TAtU...

Couldn’t be happier with yesterday’s 1st edition of KTConf.be. Some quick stats: We had a total of 59 Kotlin fans attend, including 8 speakers, of which 5 international ones. Big shout out to Kunlabora, Triple D, DPG Media, PTV Logistics and of course @jetbrains.com for their amazing support.

Channel: messages are shared out so that each message is received by exactly one consumer. Shared flow: messages are replicated so that each consumer receives its own copy of every message. #kotlin #coroutine tips 💡 The diagram is from 📚 Kotlin Coroutine Confidence 👉 pragprog.com/titles/...

One of my outcomes of @ktconf.bsky.social is an improved version of my "FIR Tree" plug-in, that now can show the statements/implications in the Control Flow Graph plugins.jetbrains.com/plugin/23270...

I had an amazing time connecting with everyone at KtKonf! And Looking forward to building a stronger Kotlin community in Belgium together. Special shout out to @sch3lp.bsky.social for taking the initiative, and everyone for making this happen ❤️ Hope to see you all again soon!

Today is @ktconf.bsky.social, the first Kotlin conference in Belgium! 🔥 I’m super exciting being here, and talking everyone’s ear off about Kotlin. Today I’m talking with my colleague Maria on how to “Koog your own AI! Delicious recipes” 😋

Looks like today is the day for JDK25! openjdk.org/projects/jdk... #java

KotlinConf 2026 CFP is open! 🔥 Looking forward to all your awesome submissions, and hearing about all the cool things everyone has been up to😁 sessionize.com/kotlinconf-2...

🚀 Ktor 3.3.0 is here! ✨ New: h2c, OpenAPI (preview), smarter static resources, Jetty 12, OkHttp 5, WebRTC (Android+WASM), Kotlin 2.2 🐞 Fixes: SSE, caching, perf, websockets + more 👉 github.com/ktorio/ktor/... #Ktor #JetBrains #Kotlin #AndroidDev #Android #Backend

Kotlin/Wasm is now officially beta! kotlinlang.org/docs/whatsne... The next step should be IMO to mature libraries like github.com/Kotlin/kotli... and github.com/JetBrains/co... to provide unmatched DevXP to build amazing applications and websites with @kotlinlang.org end-to-end.

They said Kotlin isn’t for AI. We rewrote our platform anyway. Now there’s Koog — a JVM-native AI framework for production. 🔥 Drama, lessons learned, and why nobody wants to touch Python anymore: medium.com/@vadim.brili... #AI #AIAgents #Python #Kotlin #Koog #Java #SoftwareEngineering #OpenSource