1code — Design agent for Claude Code

1Code

[1Code.dev](https://1code.dev)

Open-source coding agent client. Run Claude Code, Codex, and more - locally or in the cloud.

By [21st.dev](https://21st.dev) team

Highlights

• Multi-Agent Support - Claude Code and Codex in one app, switch instantly
• Visual UI - Cursor-like desktop app with diff previews and real-time tool execution
• Custom Models & Providers (BYOK) - Bring your own API keys
• Git Worktree Isolation - Each chat runs in its own isolated worktree
• Background Agents - Cloud sandboxes that run when your laptop sleeps
• Live Browser Previews - Preview dev branches in a real browser
• Kanban Board - Visualize agent sessions
• Built-in Git Client - Visual staging, diffs, PR creation, push to GitHub
• File Viewer - File preview with Cmd+P search and image viewer
• Integrated Terminal - Sidebar or bottom panel with Cmd+J toggle
• Model Selector - Switch between models and providers
• MCP & Plugins - Server management, plugin marketplace, rich tool display
• Automations - Trigger agents from GitHub, Linear, Slack, or manually from git events
• Chat Forking - Fork a sub-chat from any assistant message
• Message Queue - Queue prompts while an agent is working
• API - Run agents programmatically with a single API call
• Voice Input - Hold-to-talk dictation
• Plan Mode - Structured plans with markdown preview
• Extended Thinking - Enabled by default with visual UX
• Skills & Slash Commands - Custom skills and slash commands
• Custom Sub-agents - Visual task display in sidebar
• Memory - CLAUDE.md and AGENTS.md support
• PWA - Start and monitor background agents from your phone
• Cross Platform - macOS desktop, web app, Windows and Linux

Features

Run coding agents the right way

Run agents locally, in worktrees, in background - without touching main branch.

• Git Worktree Isolation - Each chat session runs in its own isolated worktree

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