crabka

Comprehensive Rust coding guidelines with 265 rules across 26 categories. Use when writing, reviewing, or refactoring Rust code. Covers ownership, error handling, async patterns, concurrency, unsafe code, API design, memory optimization, performance, numeric safety, conversions, serde, pattern matching, macros, closures, observability, testing, and common anti-patterns. Invoke with /rust-skills.

Comprehensive Rust coding guidelines with 265 rules across 26 categories. Use when writing, reviewing, or refactoring Rust code. Covers ownership, error handling, async patterns, concurrency, unsafe code, API design, memory optimization, performance, numeric safety, conversions, serde, pattern matching, macros, closures, observability, testing, and common anti-patterns. Invoke with /rust-skills.

Use the typestate pattern to encode state-machine invariants in Rust's type system instead of runtime checks. Apply when designing or reviewing any Rust type that tracks a lifecycle/mode (connection, transaction, builder, session, handshake, subscription) and currently guards operations with an enum field plus runtime `if`/`match` checks. Also use when reviewing PRs that add a new "invalid state" error variant to an existing struct.