Copper Runtime & SDK

A Rust runtime for building, running, recording, and deterministically replaying static robot task graphs, from Linux to bare metal.

▶ Try Copper in your browser  ·  Build your first app  ·  Read the book

Why Copper

Already flying, driving, swimming, spacefaring, and powering humanoids.

See It Run

These are the same Copper applications used on physical robots, recompiled for the browser. The simulator runs beside a live view of the Copper task graph and latency.

Watch more robots built with Copper in the community showcase, or explore the cross-framework benchmarks.

Build Your First Copper App

Install the latest stable Rust toolchain, then:

cargo install cargo-cunew
cargo cunew hello_copper
cd hello_copper
cargo run

In about 30 seconds, you have a typed source → task → sink graph that prints its first messages and records logs/hello-copper.copper. Start with copperconfig.ron, src/main.rs, and src/tasks.rs; the generated justfile also provides helpers for logs, CopperLists, topology (just dag), the exact generated process schedule (just plan), post-execution timing from the default Copper log (just plan-log), and replay.

How Copper Fits Together

flowchart LR
    Config["copperconfig.ron<br/>Static task graph"]
    Generate["#[copper_runtime]<br/>Compile-time generation"]
    Runtime["Deterministic runtime<br/>Zero-alloc hot path"]
    Log["Unified .copper log"]
    Tools["Replay · Export · Inspect"]

    Config --> Generate --> Runtime --> Log --> Tools

The robot is a static thing: Copper turns its declared graph into a purpose-built runtime, then records messages, timing, and state into one replayable log.

Explore Copper