ThinkRail

About

ThinkRail is an open source JetBrains incubator project, Apache 2.0, and one of the top trending repos on GitHub this week. It wraps the pi coding agent in a real workbench: Monaco tabs, terminals, diffs and review comments, all scoped to an isolated workspace. You bring your own model provider or sign in with JetBrains AI; ThinkRail has no accounts of its own.

## What it does Open any git repo as a project and cut workspaces from it as git worktrees, each on its own branch. Agents work in parallel without touching your checkout, then you merge the good branch and drop the rest. The topbar tracks the branch against origin and its pull request, shows CI checks and lets you hand failing checks back to the agent. ## Specs and skills A connected graph of `SPEC.md` files lives next to the code and the agent reads and maintains it with dedicated tools, so decisions survive the session. Agent Skills you already keep for other coding agents are read in place, and bundled workflows cover project setup, design brainstorming and shipping a PR. ## MCP and safety It connects the MCP servers from your pi config, asks in chat before calls that are not marked read only, and keeps servers a repo defines off until you approve them. ## Install Desktop installers for macOS, Windows and Linux, or the CLI that opens the same app in your browser: `curl -fsSL https://raw.githubusercontent.com/JetBrains/thinkrail/main/install.sh | bash`.

Features

• Isolated git worktree workspace per task
• Several concurrent pi chats with live token and cost readout
• SPEC.md graph the agent reads and keeps updated
• Reads your existing Agent Skills in place
• MCP servers with approval before write calls
• PR, CI checks and merge flow built in
• Desktop app or browser via the thinkrail CLI

Install