Summary About this guide Getting started The library team Meetings Membership Reviewing Building and debugging libraries The feature lifecycle Landing new features Using tracking issues Stabilizing features Deprecating features Code considerations Criteria for inclusion in std Design Public APIs When to add #[must_use] Breaking changes Breakage from changing behavior Breakage from new trait impls #[fundamental] types Breakage from changing the prelude Safety and soundness Generics and unsafe Drop and #[may_dangle] std::mem and exclusive references Using unstable language features Const generics Specialization Performance When to #[inline] Documentation doc alias policy safety comments policy how to write documentation reviewing doc changes Tools and bots @bors @rust-timer @craterbot