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1Code

Desktop orchestrator for parallel AI coding agents

open sourceupdated Aug 16, 2026

1Code is an open-source desktop application for running multiple AI coding agents in parallel with isolated git worktrees and browser previews. It orchestrates agents like Claude Code and Codex in separate sandboxed environments, preventing conflicts while enabling concurrent development on different features. Built by the 21st.dev team with 5,300+ GitHub stars.

1Code addresses the practical challenge of using autonomous coding agents in real development workflows: when an AI agent has full access to modify files, run commands, and create branches, running multiple agents simultaneously without isolation leads to conflicting changes, broken builds, and merge nightmares. 1Code solves this by giving each agent its own git worktree — a separate working directory backed by the same repository — so multiple agents can work on different features, bug fixes, or experiments concurrently without interfering with each other or the developer's main working directory.

The desktop application provides a visual dashboard showing all active agent sessions with real-time output streams, file change diffs, and browser previews for frontend work. Developers can launch new agent sessions with natural language task descriptions, monitor their progress, review changes before merging, and intervene when agents need guidance. The orchestration layer handles worktree lifecycle management, branch creation and cleanup, and integration with cloud sandbox environments for agents that need to run servers or execute potentially destructive commands safely.

1Code represents the emerging category of agent orchestration tools that sit above individual coding agents like Claude Code, OpenAI Codex, and Gemini CLI. As developers increasingly delegate coding tasks to autonomous agents, the need for multi-agent coordination, isolation, and oversight grows proportionally. With 5,300+ GitHub stars and an Apache-2.0 license, 1Code provides the management layer that turns individual AI agents from experimental toys into reliable members of a development workflow.

Pricing

Free open source (Apache-2.0); managed cloud features paid

Platforms

Desktop — macOS, Linux, Windows

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FAQ

What is 1Code?

1Code is an open-source desktop application for running multiple AI coding agents in parallel with isolated git worktrees and browser previews. It orchestrates agents like Claude Code and Codex in separate sandboxed environments, preventing conflicts while enabling concurrent development on different features. Built by the 21st.dev team with 5,300+ GitHub stars.

Is 1Code free?

Yes — 1Code is open source and free to use. Free open source (Apache-2.0); managed cloud features paid

Is 1Code open source?

Yes — 1Code is open source.

What are the best 1Code alternatives?

The top editor-verified 1Code alternatives are Cursor, Claude Code, Goose.