# Radius

- [Welcome to Radius](https://radiusbrowser.com/docs/introduction.md): Radius is a browser where you can run coding agents in parallel, right next to your PRs, docs, terminals, and localhost servers.
- [Install Radius](https://radiusbrowser.com/docs/installation.md): Download Radius for macOS. The Radius CLI is included and configured automatically.
- [Quickstart](https://radiusbrowser.com/docs/quickstart.md): Open a tab, split it with Radius Chat, and group the workspace.
- [Agents](https://radiusbrowser.com/docs/agents/overview.md): Connect Codex, Claude, or Cursor to Radius.
- [Codex](https://radiusbrowser.com/docs/agents/codex/overview.md): Choose CLI or API-key authentication for Codex in Radius.
- [Codex CLI](https://radiusbrowser.com/docs/agents/codex/cli.md): Use your existing Codex login, configuration, and provider environment.
- [Codex API key](https://radiusbrowser.com/docs/agents/codex/api-key.md): Use an OpenAI API key stored securely by Radius.
- [Claude](https://radiusbrowser.com/docs/agents/claude/overview.md): Choose CLI or API-key authentication for Claude in Radius.
- [Claude CLI](https://radiusbrowser.com/docs/agents/claude/cli.md): Use your existing Claude login, settings, and provider environment.
- [Claude API key](https://radiusbrowser.com/docs/agents/claude/api-key.md): Use an Anthropic API key stored securely by Radius.
- [Cursor API key](https://radiusbrowser.com/docs/agents/cursor/api-key.md): Connect the Cursor Agent SDK with a Cursor API key.
- [Tabs](https://radiusbrowser.com/docs/radius-cli/tabs.md): Open tabs, position them relative to one another, and manage split layouts.
- [Groups](https://radiusbrowser.com/docs/radius-cli/groups.md): Create groups, add tabs, and manage their contents.
- [Command reference](https://radiusbrowser.com/docs/radius-cli/commands.md): Reference for Radius CLI resources, commands, and structural options.
- [Errors and exit codes](https://radiusbrowser.com/docs/radius-cli/errors-and-exit-codes.md): Handle Radius CLI failures with stable error codes and process exit statuses.
- [CLI troubleshooting](https://radiusbrowser.com/docs/radius-cli/troubleshooting.md): Repair or diagnose the Radius command in an external terminal.
- [Event streams](https://radiusbrowser.com/docs/radius-cli/events.md): Experimentally observe Radius CLI commands and browser workspace changes.
- [Multiple Radius instances](https://radiusbrowser.com/docs/radius-cli/multiple-instances.md): Choose which running Radius instance receives a command.
- [Project settings](https://radiusbrowser.com/docs/project-settings/overview.md): Share repository behavior and keep machine-specific Radius settings private.
- [Setup scripts](https://radiusbrowser.com/docs/project-settings/setup-scripts.md): Install dependencies and set up your workspace when you create a new worktree with setup scripts.
- [Environment and copied files](https://radiusbrowser.com/docs/project-settings/environment-and-files.md): Configure repository variables, local secrets, and ignored files copied into Radius worktrees.
- [Git and worktrees](https://radiusbrowser.com/docs/project-settings/git-and-worktrees.md): Configure the starting ref, remote, push behavior, and archive lifecycle for Radius worktrees.
- [Run and archive scripts](https://radiusbrowser.com/docs/project-settings/run-and-archive-scripts.md): Configure reusable terminal commands and cleanup that runs before a worktree is archived.
- [Settings file reference](https://radiusbrowser.com/docs/project-settings/file-reference.md): Complete TOML reference for shared and local Radius project settings.
- [Create a workspace for every worktree](https://radiusbrowser.com/docs/cookbook/worktree-workspace.md): Open chat, diffs, a terminal, and localhost in a reusable worktree layout.
- [Changelog](https://radiusbrowser.com/docs/changelog.md): See what is new in Radius.