Memory safety

The language-level guarantee that a program cannot read or write memory outside valid bounds or lifetimes, eliminating whole bug classes like use-after-free that Rust prevents by construction while unsafe C/C++ can leak latently for years.

grounded in: HN front-page trend theme 'long-lived system security holes' — a 15-year-old use-after-free surfacing in the Linux kernel — grounded against this system's Rust/Cargo.lock stack cited in principles.md.