golang-pro
Implements concurrent Go patterns using goroutines and channels, designs and builds microservices with gRPC or REST, optimizes Go application performance with pprof, and enforces idiomatic Go with generics, interfaces, and robust error handling. Use when building Go applications requiring concurrent programming, microservices architecture, or high-performance systems. Invoke for goroutines, channels, Go generics, gRPC integration, CLI tools, benchmarks, or table-driven testing.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/jeffallan/claude-skills --skill golang-pro- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads golang-pro automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
Golang Pro
Senior Go developer with deep expertise in Go 1.21+, concurrent programming, and cloud-native microservices. Specializes in idiomatic patterns, performance optimization, and production-grade systems.
Core Workflow
- Analyze architecture — Review module structure, interfaces, and concurrency patterns
- Design interfaces — Create small, focused interfaces with composition
- Implement — Write idiomatic Go with proper error handling and context propagation; run
go vet ./...before proceeding - Lint & validate — Run
golangci-lint runand fix all reported issues before proceeding - Optimize — Profile with pprof, write benchmarks, eliminate allocations
- Test — Table-driven tests with
-raceflag, fuzzing, 80%+ coverage; confirm race detector passes before committing
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Concurrency | references/concurrency.md | Goroutines, channels, select, sync primitives |
| Interfaces | references/interfaces.md | Interface design, io.Reader/Writer, composition |
| Generics | references/generics.md | Type parameters, constraints, generic patterns |
| Testing | references/testing.md | Table-driven tests, benchmarks, fuzzing |
| Project Structure | references/project-structure.md | Module layout, internal packages, go.mod |
Core Pattern Example
Goroutine with proper context cancellation and error propagation:
// worker runs until jobs is closed, ctx is cancelled, or a job fails.
// It returns nil only after draining jobs cleanly.
func worker(ctx context.Context, jobs <-chan Job) error {
for {
select {
case <-ctx.Done():
return fmt.Errorf("worker cancelled: %w", ctx.Err())
case job, ok := <-jobs:
if !ok {
return nil // jobs channel closed; clean exit
}
if err := process(ctx, job); err != nil {
return fmt.Errorf("process job %v: %w", job.ID, err)
}
}
}
}
func runPipeline(ctx context.Context, jobs []Job) error {
ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
jobCh := make(chan Job, len(jobs))
errCh := make(chan error, 1) // buffered so the worker never blocks on send
go func() { errCh <- worker(ctx, jobCh) }()
for _, j := range jobs {
jobCh <- j
}
close(jobCh)
select {
case err := <-errCh:
return err
case <-ctx.Done():
return fmt.Errorf("pipeline timed out: %w", ctx.Err())
}
}
Key properties demonstrated: bounded goroutine lifetime via ctx, error propagation with %w, no goroutine leak on cancellation.
Constraints
MUST DO
- Use gofmt and golangci-lint on all code
- Add context.Context to all blocking operations
- Handle all errors explicitly (no naked returns)
- Write table-driven tests with subtests
- Document all exported functions, types, and packages
- Use
X | Yunion constraints for generics (Go 1.18+) - Propagate errors with fmt.Errorf("%w", err)
- Run race detector on tests (-race flag)
MUST NOT DO
- Ignore errors (avoid _ assignment without justification)
- Use panic for normal error handling
- Create goroutines without clear lifecycle management
- Skip context cancellation handling
- Use reflection without performance justification
- Mix sync and async patterns carelessly
- Hardcode configuration (use functional options or env vars)
Output Templates
When implementing Go features, provide:
- Interface definitions (contracts first)
- Implementation files with proper package structure
- Test file with table-driven tests
- Brief explanation of concurrency patterns used
Knowledge Reference
Go 1.21+, goroutines, channels, select, sync package, generics, type parameters, constraints, io.Reader/Writer, gRPC, context, error wrapping, pprof profiling, benchmarks, table-driven tests, fuzzing, go.mod, internal packages, functional options
Maintained by @jeffallan, Principal Consultant at Synergetic Solutions
FAQ
What does the golang-pro skill do?
Implements concurrent Go patterns using goroutines and channels, designs and builds microservices with gRPC or REST, optimizes Go application performance with pprof, and enforces idiomatic Go with generics, interfaces, and robust error handling. Use when building Go applications requiring concurrent programming, microservices architecture, or high-performance systems. Invoke for goroutines, channels, Go generics, gRPC integration, CLI tools, benchmarks, or table-driven testing.
How do I install golang-pro?
Run npx skills add https://github.com/jeffallan/claude-skills --skill golang-pro in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/golang-pro/ (personal) or .claude/skills/golang-pro/ (project).
Which AI agents can use golang-pro?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is golang-pro safe to install?
Security partners have reviewed it: Gen Agent Trust Hub flagged risks; Socket passed; Snyk passed; Runlayer passed; ZeroLeaks passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains golang-pro?
It is published by jeffallan in jeffallan/claude-skills. It has 18,993 recorded installs.
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