JetBrains ThinkRail: many AI agents, one workshop

What it is

JetBrains, a company that makes tools programmers use every day, has released something a little unusual. It's called ThinkRail, and it's free and open source. Most coding tools take a classic editor and attach an AI assistant to the side. ThinkRail turns that around: it starts with an AI coding agent called pi and builds the whole workspace around it.

Why it caught my eye

Picture a kitchen where every cook gets their own station and their own copy of the recipe. Nobody bumps elbows, and the head chef decides which dish goes out. That's roughly how ThinkRail handles work. Each task gets its own separate copy of the project, so several agents can work at once while the official version stays untouched until someone approves the changes.

It also keeps a set of notes about the project that the agent can return to, so it doesn't start from zero every time. It runs on Mac, Windows, Linux or in a browser.

Not everyone is charmed. It climbed GitHub's weekly trending list quickly, but some people grumbled that its own documentation reads like AI wrote it, and asked why JetBrains keeps launching overlapping agent products.

What it means for you

You probably won't open it yourself. But if you pay for software work, this is the direction things are moving: one person directing several AI helpers in parallel, then reviewing what they made. A good question for your developer: how do you check the agents' work before it goes live?

Words worth knowing

• Coding agent: an AI that doesn't just suggest code but writes, runs and fixes it on its own.
• Git worktree: a separate working copy of the same project, so changes in one don't disturb the others.
• Main branch: the official, approved version of your software.