21st-dev/1code
1code
1code is an AI-assisted development environment that provides a unified interface for switching between multiple AI coding agents. It toggles between a read-only analysis mode and a full execution mode, asking clarifying questions, building structured plans with previews, and requiring user approval before making code changes. The environment integrates with external services and tools through the Model Context Protocol (MCP), enabling connections to databases, project management systems, and code repositories. Agent sessions can run either locally or in persistent cloud sandboxes that stay alive even when the laptop is closed, with live browser previews available.
What distinguishes 1code is its combination of agent isolation and visual Git workflow management. Each agent session runs in a separate Git worktree so changes never affect the main branch, and a built-in Git client allows staging, diffing, committing, and creating pull requests without leaving the application. The platform also includes an AI-driven UI component builder that generates production-ready components from natural language descriptions, a marketplace for publishing and sharing those components, and a logo search tool for finding company logos in SVG and other vector formats.
The environment supports on-demand agent triggering from issues, messages, or external tools, and provides real-time visual diffs of every file edit, command, and search result. It also offers a public component library for browsing ready-to-use UI patterns, along with design inspiration sourced from top design systems.