Individual skill

rust-concurrency-primitives

Design and review thread-based Rust concurrency with explicit ownership, sharing, and synchronization choices. Use when writing, refactoring, or reviewing threads, scoped threads, channels, Arc, Mutex, RwLock, Condvar, atomics, OnceLock, LazyLock, Send, Sync, deadlocks, or shared state.

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Repository last updated: Nov 6, 2026
License: Apache-2.0

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# Rust Concurrency Primitives

Use this skill to design thread-based Rust concurrency with explicit ownership,
sharing, and synchronization. Prefer the simplest primitive that matches the
coordination requirement before adding shared mutable state.

## Core Workflow

1. Classify the work: independent fork-join, producer/consumer pipeline, shared
   state, one-time initialization, or low-level atomic coordination.
2. Prefer owned data per thread. Add shared ownership only when data must be
   observed or mutated by multiple threads.
3. Use `std::thread::scope` when child threads can borrow stack data and must
   finish before the function returns.