When should I use errgroup instead of sync.WaitGroup?

Use errgroup when you need to collect errors from goroutines, propagate the first error encountered, or automatically cancel sibling tasks when one fails.

What is the primary rule of this concurrency skill?

The core rule is 'No fire-and-forget goroutines.' Every goroutine must have a managed lifecycle with context cancellation and proper synchronization.

How does this skill handle high-volume processing?

It implements worker pools and bounded concurrency patterns (like errgroup.SetLimit) to provide backpressure and prevent resource exhaustion.

Does this skill support graceful shutdowns?

Yes, it provides patterns for listening to context cancellation signals and using wait groups to ensure all background tasks finish before the process exits.

Go Concurrency Patterns

Name: Go Concurrency Patterns
Author: cemezgin

bycemezgin

0•

API Development

Implements robust Go concurrency patterns using errgroup, worker pools, and lifecycle management to prevent goroutine leaks.

This skill provides Claude with domain-specific knowledge to write safe, performant concurrent code in Go. It enforces a strict 'no fire-and-forget' rule, ensuring every goroutine has a managed lifecycle via context cancellation and proper synchronization. Whether handling parallel API requests with errgroup or managing high-volume data processing with worker pools, this skill guides Claude to implement best practices for graceful shutdowns and bounded concurrency, effectively preventing common pitfalls like memory leaks and unhandled errors in backend services.

Key Features

010 GitHub stars

02Context-aware graceful shutdowns

03Managed goroutine lifecycle enforcement

04Bounded concurrency with worker pools

05Error propagation for parallel requests

06Advanced errgroup pattern implementation

Use Cases

01Processing high-volume data streams using fixed-size worker pools for backpressure

02Executing multiple parallel HTTP or database calls with centralized error handling

03Building resilient backend services that respect cancellation signals and shutdown gracefully

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add cemezgin/go-service-guide concurrency

For use in Claude.ai and ChatGPT

Download Skill