21st-dev/1code

1Code is an open-source desktop application that provides a unified interface for running AI coding agents, including Claude Code and OpenAI Codex. Instead of running these agents from the command line, you interact with them through a visual app that shows you what the agent is doing in real time, including which files it is editing, what terminal commands it is running, and what changes it is making before they are applied. A central feature is git worktree isolation. When you start a chat session with an agent, the app creates a separate isolated copy of your codebase for that session. This means the agent works without touching your main branch or interfering with other work, and you can review and roll back changes from any point in the conversation. The app includes a built-in git client for staging, committing, and pushing changes to GitHub, a file viewer with keyboard search, an integrated terminal, and diff previews that show exactly what the agent changed. There is also a plan mode where the agent asks clarifying questions and produces a step-by-step plan for your review before it starts making any changes. Background agents are supported: these run in cloud sandboxes and continue working even when your laptop is closed. The app also exposes an API so you can trigger agents programmatically from other tools, and it supports automations that fire based on events in GitHub, Linear, or Slack. You can build the app from source using Bun and a few prerequisites, or subscribe at 1code.dev for pre-built downloads and background agent access. The project is released under the Apache 2.0 license.