Open source · written in Rust

A coding agent for the terminal

presentation video

One command, zero setup

A single command drops a compiled Rust binary on your machine, and the only step after that is pointing it at a model provider.

  • Linux & macOS — single binary
  • Written in Rust, no runtime dependencies
  • Runs fully offline
bash
curl -fsSL https://cosh.dev/install.sh | sh

Or download the binary directly →

changelogview all →
  • v0.1.0Aug 01, 2026

    Context manager with a token budget and layered auto-compaction.

  • v0.0.9Jul 18, 2026

    Model Router — a primary model plus per-provider fallbacks with position control.

  • v0.0.8Jul 02, 2026

    Permission guardrails — allow, deny and allow-once approval for tools.

  • v0.0.7Jun 15, 2026

    RAG knowledge bases — embed files or URLs into local databases from the TUI.

  • v0.0.6May 30, 2026

    Session history and OS-keyring-backed provider keys.