Magnitude

Magnitude is an open-source, subagent-native coding agent built from the ground up around subagent orchestration. Users chat with a lead agent that coordinates specialized subagents — explorers, planners, builders, reviewers, debuggers, and a browser agent — on their behalf. Subagents are long-lived and resumable, can be run in parallel, and share a common workspace to ensure lossless handoffs between agents. The platform supports most major model providers, including OpenAI, Anthropic, Google Gemini, and local models.