Go Concurrency Patterns by @wshobson · Skillet

Go Concurrency Patterns

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

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SKILL.md

go-concurrency-patterns

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`

2 files · 13 KB3 KB

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Don't communicate by sharing memory;
share memory by communicating.

package main

import (
    "context"
    "fmt"
    "sync"
    "time"
)

func main() {
    ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
    defer cancel()

    results := make(chan string, 10)
    var wg sync.WaitGroup

    // Spawn workers
    for i := 0; i < 3; i++ {
        wg.Add(1)
        go worker(ctx, i, results, &wg)
    }

    // Close results when done
    go func() {
        wg.Wait()
        close(results)
    }()

    // Collect results
    for result := range results {
        fmt.Println(result)
    }
}

func worker(ctx context.Context, id int, results chan<- string, wg *sync.WaitGroup) {
    defer wg.Done()

    select {
    case <-ctx.Done():
        return
    case results <- fmt.Sprintf("Worker %d done", id):
    }
}

Go Concurrency Patterns

Go Concurrency Patterns

When to Use This Skill

Core Concepts

1. Go Concurrency Primitives

2. Go Concurrency Mantra

Quick Start

Detailed patterns and worked examples

Best Practices

Do's

Don'ts