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Go Concurrency Patterns

Seth HobsonCommunityCreated by Seth Hobson

  • Skill
  • Guidelines
  • Software development
  • MIT
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From the author

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

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides a structured reference for implementing robust concurrency in Go. It covers essential primitives like goroutines, channels, and synchronization tools, while emphasizing the Go philosophy of communicating by sharing memory. The documentation includes practical implementation patterns such as worker pools, fan-out/fan-in pipelines, and semaphore-based rate limiting, alongside critical best practices for lifecycle management and error handling.

What it does

  • Explains core Go concurrency primitives including channels, mutexes, and wait groups.
  • Provides implementation patterns for worker pools and concurrent pipelines.
  • Demonstrates proper use of context for cancellation and deadline management.
  • Outlines best practices to prevent common issues like goroutine leaks and race conditions.
  • Offers idiomatic approaches to synchronization and communication between goroutines.

When to use it

  • When building concurrent applications that require efficient task processing.
  • When implementing worker pools or fan-out/fan-in architectures.
  • When you need to manage goroutine lifecycles and graceful shutdowns.
  • When debugging race conditions or synchronization issues in Go code.
  • When looking for idiomatic ways to handle communication between concurrent processes.

Advantages

  • Promotes idiomatic Go concurrency standards.
  • Reduces common errors like goroutine leaks and improper channel usage.
  • Provides ready-to-use patterns for complex concurrent workflows.
  • Focuses on maintainable and safe synchronization techniques.

Usage examples

“How do I implement a worker pool in Go?”
The skill provides a WorkerPool pattern using channels and sync.WaitGroup to manage concurrent job processing with context-aware cancellation.
“What is the best way to merge multiple channels in Go?”
The skill demonstrates a fan-in pattern using a merge function that utilizes sync.WaitGroup to aggregate results from multiple channels into a single stream.

Install

  1. Download the skill as a ZIP:

    https://autogineer.com/agent-skills/wshobson/go-concurrency-patterns/download

  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip go-concurrency-patterns.zip -d .agents/skills

Documentation by Seth Hobson

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
PrimitivePurpose
goroutineLightweight concurrent execution
channelCommunication between goroutines
selectMultiplex channel operations
sync.MutexMutual exclusion
sync.WaitGroupWait for goroutines to complete
context.ContextCancellation and deadlines
2. Go Concurrency Mantra
Don't communicate by sharing memory;
share memory by communicating.

Quick Start

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):
    }
}

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

Files

ATTRIBUTION.md

Attribution

This folder is an unmodified copy of the Agent Skill "go-concurrency-patterns", distributed by AutoGineer (https://autogineer.com/agent-skills).

The skill's own files are unmodified copies. AutoGineer is not affiliated with or endorsed by the author or the publisher.

Files added by AutoGineer

  • ATTRIBUTION.md: this file, written by AutoGineer

  • LICENSE: copied from LICENSE

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Security

No issues found by our static scan· No issues found

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

Attribution and licence

Created by
Seth Hobson
Publisher
Seth Hobson (Community)
Source
wshobson/agents · plugins/systems-programming/skills/go-concurrency-patterns · commit 4bde316
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

AutoGineer is not affiliated with or endorsed by Seth Hobson or Seth Hobson.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download go-concurrency-patterns.zip