The JetBrains Blog

What happens before an engineer gets paged? Prasun Kumar of Oppex AI on the “chaos monkey” that trains his agents and 25 years with IntelliJ IDEA.

100 Exercises to Learn Rust is our adaptation of Mainmatter's course of the same name and it has just received its biggest update!

Code quality is shaped by countless decisions, from how developers manage complexity to how quickly they detect regressions. But common concepts such as technical debt, cognitive complexity and unit testing are not always clearly understood. In a new code quality Q&A session, we asked members…

No need to chase every AI update. JetBrains' AIDEs Framework covers the levels of AI delegation and where AI development tools are actually headed.

We want local coding agents to be smart and fast, with the ability to understand a codebase, do useful work, and finish tasks without long waits. This Junie Local update makes it practical to use a more capable model on your own machine. In the first release, we had to choose between two versions of…

Let Junie test a feature in your app, watch it work, and review the video, screenshots, and HTML report.

Ktor 3.6.0 is here! This release brings typed authentication, OpenID Connect, HTTP/3 for Netty, and simpler Kotlin Multiplatform clients.

Part 1: Parsing, chunking, and vectorization  Some time ago, we set out to build the best semantic code search platform we could: a RAG pipeline that gives LLM agents precise, citable evidence from real repositories instead of whatever grep happens to surface. The eventual solution was JetBrains Con…

We've released updates for multiple major MPS versions that fix several issues. DOWNLOAD MPS 2026.1.1 Check out all the updates in each particular version below: MPS 2026.1.1 The Projectional Agent Toolkit receives several practical improvements that allow agents to: See and invoke intentions a…

Modern development tools, especially IntelliJ IDEA, have such comprehensive debugging support that for virtually any niche use case, there is a specialized tool for the job. This can make it hard to know where to begin. If you are new to debugging tools and want the biggest return on your learning i…

We’ve released version 2026.2.2 of ReSharper, Rider, and .NET tools. You can install this update from inside the tools themselves, through the Toolbox App, or on our website. Here’s what’s new in this update. Rider 2026.2.2 AI Agent Setup widget We’ve recently added a wide range of featu…

We’ve all been there: you join a new project, and the first thing you ask for is the architecture diagram. You're handed a diagram that looks great, but after a week of debugging, you realize it’s six months out of date. Service A hasn't talked to Service B since the spring, and there’s a new messag…