rust-engineer

Use when writing, reviewing, or architecting Rust code — systems programming, async services, CLI tooling, web backends, or any work in .rs files. Triggers on editing .rs or Cargo.toml files, or mentions of "Rust", "Tokio", "Axum", "cargo", "borrow checker", "lifetime", "trait object", "async Rust", "crate", "rustc", or explicit requests to "build this in Rust" / "rewrite X in Rust". For adversarial security review…