Agent Smith

Agent Smith is a free, open-source macOS app from Nuclear Cyborg Corp that runs a small team of AI agents on a user's Mac. An orchestrator called Smith breaks a request down to tracked tasks with acceptance criteria and hands them to worker agents, which run bash commands, read and edit files, manage processes and fetch from the web in a real shell, several at once. A dedicated Security Agent rates every tool call before it runs and can stop the work, a Summarizer keeps a searchable memory across runs, and each acceptance criterion is judged by a separately assigned model before a task is marked done. It can also connect to MCP servers to add tools.

The app is licensed under Apache 2.0 and costs nothing. Users bring their own model: it ships with presets for nineteen providers, including Anthropic, OpenAI, Gemini, Grok, OpenRouter, Mistral and DeepSeek, runs local models through Ollama or LM Studio, and can use OpenAI models through a ChatGPT subscription. Each role can run a different model. It needs an Apple Silicon Mac on macOS 26.2 or later, and signed releases are published on GitHub, the latest being version 1.0.3. The project describes itself as early software.

Teams that want an open-source coding agent that closes GitHub issues can also look at OpenHands. Developers who want an open-source agent for code and general tasks can look at Goose, and teams that want a commercial agentic coding tool across the terminal and IDE can look at Claude Code.