Master Go concurrency with goroutines, channels, sync primitives, and context. Use when building concurrent Go applications, implementing worker pools, or debugging race conditions.

Go Concurrency Patterns Production patterns for Go concurrency including goroutines, channels, synchronization primitives, and context management. When to Use This Skill Building concurrent Go applications Implementing worker pools and pipelines Managing goroutine lifecycles Using channels for communication Debugging race conditions Implementing graceful shutdown Core Concepts 1. Go Concurrency Primitives Primitive Purpose goroutine Lightweight concurrent execution channel Communication between goroutines select Multiplex channel operations sync.Mutex Mutual exclusion sync.WaitGroup Wait for goroutines to complete context.Context Cancellation and deadlines 2. Go Concurrency Mantra Quick Start Detailed patterns and worked examples Detailed pattern documentation lives in references/details.md . Read that file when the navigation tier above is insufficient. Best Practices Do's Use context For cancellation and deadlines Close channels From sender side only Use errgroup For concurrent operations with errors Buffer channels When you know the count Prefer channels Over mutexes when possible Don'ts Don't leak goroutines Always have exit path Don't close from receiver Causes panic Don't use shared memory Unless necessary Don't ignore context cancellation Check ctx.Done() Don't use time.Sleep for sync Use proper primitives

go-concurrency-patterns