Radius

Radius is a macOS browser built for working with coding agents. The idea is that the browser acts as the IDE, with agents, terminals, diff viewers, pull requests, documentation and localhost servers all open as tabs in one window. It is aimed at developers who run Claude Code, Codex or Cursor Agent, which are used directly inside Radius with no new subscription required. Agents can run in parallel across Git worktrees. Radius creates a space for each project and groups the tabs for each worktree together, and the chat panel supports planning, an @ mention for context and slash commands for skills. A diff view shows changes made by an agent so they can be reviewed, and a built in terminal sits beside the web pages being worked on. Tabs and groups can be scripted through Unix commands with the Radius CLI, for example to open an issue page, arrange splits and focus the right surface when setting up a worktree. The documentation covers writing setup commands for worktrees. The site describes Radius as a free macOS browser and offers a download for macOS. No paid plans are published. Since the agents are the user's existing Claude Code, Codex or Cursor subscriptions, their own usage costs apply separately.