FrontierAgent open-sourced a TUI agent framework with no Docker requirement.

Created August 22, Apache-2.0, 433 stars, still pushed daily, offering both ReAct and multi-agent Agent Team modes with one-command install on macOS and Linux, no preinstall step, no hard Docker dependency (GitHub). Dropping the container requirement is the differentiator against most frameworks in this bracket, which assume a sandbox runtime is available. It's also, per the DeepSeek Harness item above, a real trade-off rather than pure convenience.