Radius
Your browser should be your IDE.
Radius is a free macOS browser designed to let developers run coding agents in parallel alongside pull requests, documentation, terminals, and localhost servers. It solves the problem of context switching by keeping all development surfaces—agent chats, diffs, terminals, and web apps—in a single window, organized by project spaces and worktree groups.
The browser includes tabs for agent chats, terminal sessions, diff viewers, and web pages, all within one window. It supports coding agents such as Claude Code, Codex, and Cursor Agent, which authenticate directly with their providers. Projects are automatically separated into spaces, and worktrees are grouped into tab sets. A Radius CLI allows scripting of tab layouts and splits via Unix commands. The browser is built on Chromium and stores all worktrees, sessions, and agent state locally.
Radius is intended for macOS developers who already use a coding agent subscription. It is free to download and adds no additional subscription cost. The product is available for Apple Silicon and Intel Macs, with no mention of a free plan, trial, or other editions.
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