# Atlas·OS

> Atlas·OS is an open-source (MIT), multi-agent, hook-driven, model-agnostic command-line interface for spec-driven development. It deploys a crew of role-routed specialist agents — not a single chatbot — to take a project from a vague idea through PRD, architecture, stories, implementation, QA and release, all from the terminal.

Atlas·OS is built for developers who want a Claude Code alternative, an open-source coding CLI, or a model-agnostic agentic terminal. It runs on macOS, Linux and Windows, supports any LLM provider (Anthropic, OpenAI, Google, local models via Ollama, etc.), and ships with typed TypeScript lifecycle hooks that can block, modify or allow any tool call.

Key facts:

- License: MIT
- Type: Multi-agent CLI / TUI for spec-driven development
- Models: Provider-agnostic (Claude, GPT, Gemini, local, …)
- Repository: https://github.com/lucapohl-angel/ATLAS_OS
- Website: https://atlas-os.dev
- Install: `npm i -g atlas-os` · `bun add -g atlas-os` · `npx atlas-os@latest`

## Docs

- [Getting Started](https://atlas-os.dev/docs/getting-started): Install Atlas·OS and run your first agent crew
- [Installation](https://atlas-os.dev/docs/installation): Detailed install instructions for npm, bun, npx, and VS Code
- [Providers](https://atlas-os.dev/docs/providers): Configure Anthropic, OpenAI, Google, and local model providers
- [VS Code Setup](https://atlas-os.dev/docs/vscode-setup): Use Atlas·OS inside VS Code
- [Greenfield Projects](https://atlas-os.dev/docs/greenfield): Start a new project from scratch with the SDD pipeline
- [Brownfield Projects](https://atlas-os.dev/docs/brownfield): Onboard Atlas·OS into an existing codebase
- [Hooks](https://atlas-os.dev/docs/hooks): Typed TypeScript lifecycle hooks for guardrails and policy
- [Config & Models](https://atlas-os.dev/docs/config-models): Configuration reference and model routing
- [Agents & Skills](https://atlas-os.dev/docs/agents-skills): The Greek pantheon of specialist agents and reusable skills
- [MCP Servers](https://atlas-os.dev/docs/mcp-servers): Connect external tools via the Model Context Protocol
- [Development](https://atlas-os.dev/docs/dev): Contribute to Atlas·OS

## Comparisons

- [Atlas·OS vs Claude Code](https://atlas-os.dev/alternatives): Open-source, multi-provider alternative to Anthropic's CLI
- [Atlas·OS vs OpenCode](https://atlas-os.dev/alternatives): Adds full SDD pipeline and role-routed agents
- [Atlas·OS vs Gemini CLI](https://atlas-os.dev/alternatives): Multi-provider and model-agnostic
- [Atlas·OS vs Cursor](https://atlas-os.dev/alternatives): Terminal-first, no IDE lock-in

## FAQ

- [Frequently Asked Questions](https://atlas-os.dev/faq): What Atlas·OS is, how it differs from other CLIs, supported models, install, license

## Source

- [GitHub repository](https://github.com/lucapohl-angel/ATLAS_OS): Source code, issues, releases
- [Changelog](https://github.com/lucapohl-angel/ATLAS_OS/blob/main/CHANGELOG.md): Release notes

## Optional

- [Landing page](https://atlas-os.dev): Marketing site with product overview