brat Rust Multi-agent harness for AI coding tools. Crash-safe state, parallel execution, one CLI.
brat coordinates Claude Code, Aider, OpenCode, Codex, Continue, Gemini and Copilot working in parallel on the same codebase. Crash-safe state is built on the Grite append-only event log. Single Rust CLI; no SaaS, no telemetry.
Install
$ cargo install bratFrequently asked questions
What is brat?
brat is Multi-agent harness for AI coding tools. Crash-safe state, parallel execution, one CLI. It is part of the Neul Labs open-source portfolio (36 MIT-licensed projects for AI agent infrastructure). brat coordinates Claude Code, Aider, OpenCode, Codex, Continue, Gemini and Copilot working in parallel on the same codebase. Crash-safe state is built on the Grite append-only event log. Single Rust CLI; no SaaS, no telemetry.
How do I install brat?
Install with: `cargo install brat`. brat is MIT licensed and ships prebuilt binaries where applicable.
What language is brat written in?
brat is written in Rust.
Is brat open source?
Yes. brat is MIT licensed and publicly available at https://github.com/neul-labs/brat. All 36 Neul Labs projects are MIT licensed.
How does brat compare to alternatives?
See the detailed comparison at https://www.neullabs.com/compare/brat-vs-langgraph-multi-agent.