ThinkRail

ThinkRail is a desktop and browser IDE designed for developers working with the pi coding agent. It lets you open a git repository as a project, create isolated git-worktree workspaces for parallel agent work, and pair across Monaco tabs, terminals, diffs, and concurrent chat sessions. Each workspace has its own branch and working directory, keeping the main branch clean until you merge.

The IDE is built spec-first: a connected graph of specification files lives alongside your code, and the agent reads and maintains it with dedicated tools. ThinkRail runs the pi agent in-process, giving you full control over models, skills, and costs. Available as a native desktop app for macOS, Windows, and Linux, or via a CLI that opens the same interface in your browser.