Kotlin Weekly #-535!

Kodee’s Kotlin Roundup: Shipaton 2026 Winners, Kotlin 2.5.0-Beta2, and KotlinConf 2027 (blog.jetbrains.com) Kodee rounds up the last few weeks: the Shipaton 2026 winners, Kotlin 2.5.0-Beta2, the State of Kotlin in 2026 report and KotlinConf 2027 in Kraków, whose call for speakers closes November 27.

Introducing Gemini 4 Carbon (blog.google) Koray Kavukcuoglu introduces Gemini 4 Carbon, the new frontier model from Google DeepMind, focused on cybersecurity and long horizon tasks. Cyber defenders and trusted partners get it first, developers will have access soon.

What’s new in Android developer tools and performance at Android Dev Summit (developer.android.com) Adarsh Fernando rounds up the tooling and performance news from Android Dev Summit 2026, from new Android CLI commands for agents to Compose recomposition tracing and R8 in AGP 9.3.

Your favorite agents are now integrated in Android Studio (developer.android.com) Matthew Warner announces that Android Studio Rabbit 2 is stable, and with it Bring Your Own Agent, which brings more than 40 coding agents into the IDE.

[SPONSORED] Coroutines Mastery starts next week — join now and evaluate the course during the first 3 days (coroutinesmastery.com) Coroutines Mastery starts next week. Join the cohort, attend the initial sessions, review the materials, and decide whether the format and depth are right for you. If not, you can request a full refund within 3 days from the course start. There is still time to join.

[SPONSORED] Understand Kotlin Flow faster with a free cheat sheet you’ll use in every reactive programming project (cheat-sheet.kt.academy) Master the essentials of Kotlin Flow with a free cheat sheet designed for everyday development. Quickly look up builders, operators, StateFlow, SharedFlow, flow combinations, buffering, and collection methods without interrupting your workflow.

What I learned shipping a running app with Kotlin Multiplatform, Compose, and a native Apple Watch app (fluxrunai.com) Steven Rogers shares what he learned building a running coach app on his own with Kotlin Multiplatform and Compose, while keeping the Apple Watch and Wear OS parts native.

Parse reminder dates in Kotlin Multiplatform - an offline KMP walkthrough (alox1d.github.io) A walkthrough on parsing reminder dates like ‘tomorrow from 5PM to 8PM’ offline, in shared KMP code with DateParser Kotlin.

[SPONSORED] Can your mobile release handle AI-generated code? (www.runway.team) AI multiplied the code your team writes. But the process that delivers it to users hasn’t changed: same release trains, same quality gates, same manual handoffs. Join a live panel with mobile engineering leaders on what that volume changes about the release process. Nov 12, 10am PT/1pm ET.

kotlin-compiler-go (github.com) A prototype Kotlin compiler for the JVM written in Go, that claims to be ten times faster than kotlinc. It does not compile all of Kotlin yet

ktrs (github.com) ktrs rewrites ktfmt and ktlint in Rust, with byte-identical output and no JVM to start.

Orrery (github.com) A month, week and year calendar for Compose Multiplatform, with Material 3 theming and a optional Chinese lunisolar module.

Mosaic (github.com) Nicholas Abbott’s Mosaic is a Kotlin framework to build backend responses out of Tiles, small units of work that compose each other and share repeated work within a request.

bikesched (github.com) A job scheduler for Java and Kotlin backed by PostgreSQL, with durable steps, events and retries. It is at a very early stage, expect it to break.

proctor (github.com) proctor lets you write an eval suite once in Kotlin Multiplatform and run it against Gemini Nano on Android and Apple Foundation Models on iOS.

kinuvo (github.com) A self-hosted personal AI assistant built with Kotlin, whose agents remember you across conversations.

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