7 CLAUDE.md Rules That Make AI Write Idiomatic Rust (Not C++ in Disguise)

If you've ever asked Claude Code, Cursor, or Copilot to "add a function" to a Rust crate, you know the output: borrowed &str everywhere with explicit lifetimes leaking into public signatures, .unwrap() on every Result, a std::sync::Mutex held across an .await, and a panic!() instead of an error path