Building Rust Crates

Starting point. This skill captures the load-bearing Rust project conventions; extend it with reference files (a full Cargo.toml, a CI workflow, a clippy config) as the patterns firm up, following the same one-owner discipline as the Python skills.

Rust's tooling is unusually good, which makes it easy to ship a crate that compiles but fails other people: a lint gate that only runs locally, an MSRV you advertise but never test, or a feature flag that breaks when a downstream unifies it. The rules below make the gate mean what it says.

Project layout & Cargo.toml essentials