deer-flow

An open-source long-horizon SuperAgent harness that researches, codes, and creates. With the help of sandboxes, memories, tools, skill, subagents and message gateway, it handles different levels of tasks that could take minutes to hours. Maintained by bytedance on GitHub, where it has earned 76,969 stars from the community.

It's actively developed around agent, agentic, agentic-framework, and is a solid reference for anyone building with these tools.