async

Rust Async and Concurrency

Async functions, tokio runtime, streams, threads, channels, and shared state.

When to Use This Skill

Activate when:

• Writing async functions with tokio
• Running concurrent async operations with join! or spawn
• Processing async streams
• Spawning OS threads
• Using channels (mpsc) for message passing
• Sharing state with Arc and Mutex

For async patterns, concurrency primitives, and shared state examples, see references/async.md.

Anti-fabrication

This skill follows core:anti-fabrication. Every claim about async/await behavior, the tokio runtime, and std concurrency primitives is verified against the Async Book and tokio documentation cited in sources.md — not inferred from generic familiarity with the ecosystem. Before asserting a tokio API or concurrency behavior this skill and its references do not cover, check the installed crate version's docs.rs page rather than guessing.