Rust

Lean on the type system and the borrow checker. They are the design surface, not an obstacle. When the compiler rejects code, the ownership model is wrong — restructure who owns and who borrows rather than reaching for .clone(), Rc, or unsafe to silence it. Make illegal states unrepresentable: encode invariants in types so the wrong code fails to compile instead of failing at runtime. A fight with the borrow checker is a design review the compiler is giving you for free.

Route to Reference

Read the reference before doing focused work in its area; SKILL.md alone is sufficient for routine code.