Rusty is a single 12 MB binary that pairs with you right where you work — fast, private, and entirely yours. No telemetry. No cloud lock-in. No bloat.
Rusty reads your repo, plans the change, edits the files, and runs your tests — narrating every step. It asks before it touches anything it shouldn't.
One agent you actually talk to, backed by a tiny crew of retro helpers. Here's how they split the work.
Here's the loop: you describe the change, Rusty reads your repo and writes the code, then hands each action to Vault, which runs it sandboxed and waits for your nod. Floppy keeps the whole crew inside one 12 MB binary, and Cassette makes it cold-start and replay in milliseconds. One tool you talk to — a tiny team doing the work.
Rusty is model-agnostic and tuned to shine on the open-source frontier — point it at a local runtime or any OpenAI-compatible endpoint and keep everything in your own walls.
Prefer a hosted frontier model? OpenAI and Anthropic work great too — same workflow, same approvals.
macOS, Linux, and Windows. No account required to start.