1Code

1Code by 21st is a calm, visual client that brings Claude Code and Codex into a single app, letting developers switch between agents instantly and run them in parallel. It provides a keyboard-first UI designed for focused work, replacing terminal commands with a polished interface for staging, diffing, committing, and opening pull requests. Backed by Y Combinator, 1Code is open source and supports both desktop and web access, with background agents that continue running even when your laptop is closed.

• Parallel Agents — Run multiple agent sessions simultaneously, each with full context and isolation, to work on several features at once.
• Multi-Agent Support — Switch between Claude Code (Anthropic) and Codex (OpenAI) instantly; sign in with your provider or bring your own API key.
• Full Agent Power — Access plan mode, skills, message editing, and every feature your agent supports — nothing is held back.
• Keyboard-First Navigation — Hotkeys for every action let you navigate, create, and manage sessions without touching your mouse.
• Built-in Git Integration — Stage files, review diffs, commit, and open pull requests with reviewers and labels directly from the UI.
• Worktree Isolation — Every agent session runs in its own git worktree, eliminating conflicts and the need for stashing.
• Background Agents — Agents keep running in isolated cloud sandboxes even when your laptop is closed, with live browser previews of dev branches.
• MCP Protocol Support — Connect any MCP-compatible server — Notion, Linear, GitHub, Slack, Sentry, PostgreSQL, or your own — to extend agent capabilities.
• @1code Triggers — Tag @1code in GitHub, Linear, or Slack to start an agent on demand for automated PR reviews, CI fixes, and task completion.
• Open Source — The full source code is available on GitHub; self-host the local desktop client for free on macOS, Windows, or Linux.