Rust Nightly

Use this skill when a Rust project uses +nightly, #![feature(...)], unstable std APIs, -Z flags, custom targets, build-std, Miri, sanitizers, rustc internals, or experimental language syntax.

Latest Checked Inventory

• Latest checked: Rust nightly docs 1.98.0-nightly (1f087276b 2026-06-13), checked 2026-06-14.
• Primary sources:
  • Unstable Book: https://doc.rust-lang.org/nightly/unstable-book/
  • Nightly std: https://doc.rust-lang.org/nightly/std/
  • Cargo unstable features: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html
  • rustc platform support: https://doc.rust-lang.org/nightly/rustc/platform-support.html
  • Rustup component history: https://rust-lang.github.io/rustup-components-history/
• Nightly APIs may change or disappear without semver compatibility. Always check the feature's tracking issue before depending on it.

Nightly Adoption Rules