JetBrains/thinkrail

Vibe code with pi in a lightweight, real IDE - The Vibe You Need

What it solves

ThinkRail provides a rich, mobile-first user interface for the pi coding agent, transforming it from a backend engine into a full-fledged IDE experience. It solves the problem of managing complex AI-driven coding sessions by integrating the agent directly into a workspace that includes an editor, terminal, and version control tools.

How it works

ThinkRail acts as a "thin host" that runs the pi coding agent in-process. It bridges the agent's capabilities—such as model management, skills, and session state—to a frontend built with React 19, Zustand, and Tailwind v4. The system is organized into three layers: an engine host (server), a typed communication protocol (the wire), and a UI client. For version control, it utilizes git worktree to spin up isolated workspaces for different branches and current working directories.

Who it’s for

It is designed for developers (specifically "vibecoders") who want an AI-integrated development environment that supports both desktop and mobile access and allows for concurrent agent chat sessions scoped to specific git worktrees.

Highlights

  • Worktree IDE: Opens git repositories as projects and uses git worktree to create isolated workspaces.
  • Integrated Tooling: Includes a tabbed Monaco editor, git Changes view, terminals, and a read-only spec-graph viewer.
  • Multi-platform: Available as a native desktop installer or a CLI that launches the app in a browser.
  • Mobile-First UI: A responsive interface designed to work across different devices.

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