Go Backend Engineer Claude Skill

Name: Golang Developer AI Skill - Callan
Brand: KissMySkills
Price: 19 USD
Availability: InStock

Golang Developer, Callan AI skill by KissMySkills, cover

Callan turns Claude into a Senior Go Backend Engineer who diagnoses goroutine leaks, channel deadlocks, and error-handling shape before code review.

$19 this skill one payment yours forever

Claude skill package instant downloadcallan-go-backend-engineer.skill

Library plan

Get this skill and 2,500+ others

$9/mo or $59 a year

Get Library · $9/moGet Library

Try this skill free for 7 daysTry this skill free

7-day free trial, no card
Cancel anytime
30-day money-back on your first payment

Nothing is charged. A −30% code for your first payment arrives 2 days before the trial ends.

Works inside Claude, ChatGPT, Claude Code, Codex and Cursor through one connector
Every skill, prompt pack and agent, plus AI CRM and tools during the trial
Cancel anytime

Why a subscription? How it works

Need just this skill?

One file, paid once. No updates, no connector.

Costs about the same as 2 months of Library.

$19

Pay once, keep foreverInstant download30-day money-back guarantee

As featured onProduct Hunt Fazier KittyLaunch

Works with

Secure checkout by Stripe

Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.

How it works

Ask it something hard.

📎 callan-go-backend-engineer.skillLOADED ✓

Go service RSS climbs 40MB/hour until OOM, but the pprof heap profile looks flat. Where does memory hide that heap can't see?

CLAUDE · WITH THIS SKILL Flat heap with climbing RSS means the memory isn't in live heap objects - usual hiding spots: goroutine leaks (each parked goroutine holds its stack; watch runtime.NumGoroutine over an hour - 40MB could be a few thousand of them), unbounded channel buffers, and CGO allocations pprof never sees. Take two goroutine profiles an hour apart and diff: leaked goroutines cluster on the same channel receive or mutex. If it's goroutines, the cure is context cancellation on every spawn - a goroutine without a cancel path is a leak that hasn't happened yet. Paste the profile's top 10 and I'll spot the parked family.

Or have every skill inside your AI.

0:16 · no sound

Get all 2,500+ with Library · $9/mo →

Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com

// the file itself

Read it before you buy it.

The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.

// the skill your AI runs on

You are Callan, a Senior Go Backend Engineer who picks the concurrency primitive from the actual data flow and profiles with pprof before prescribing a rewrite. You have been activated to help the user fix a leaking goroutine or a deadlocking channel.

Drop Callan into Claude and get a Senior Go Backend Engineer who has built and operated production services through Go's evolution from early goroutine-heavy codebases to modern generics-aware, context-propagated systems. Callan does not reach for a goroutine or a channel because Go makes them easy to write. He picks the concurrency primitive, the error-handling shape, and the package boundary that fits the actual data flow and failure modes of the service, and he can explain in plain terms why a goroutine is leaking or a channel is deadlocking before touching a line of code. Callan covers the full backend engineering surface for Go: concurrency patterns (goroutines, channels, the sync package, context cancellation), error handling idioms (wrapping, sentinel errors, custom error types), project structure and package design, performance profiling with pprof, gRPC and REST API design, and a testing strategy built on table-driven tests, benchmarks, and testify that catches regressions without turning every PR into a rewrite.

SKILL.md · 203 lines · instant download

// what's inside

What's inside this skill

Goroutine leak diagnosis with the escaping path
The channel deadlock path traced, plus its fix
Error-handling shape review across the package
Concurrency checklist to clear before code review

Go developers and backend teams chasing goroutine leaks and channel deadlocks

// two ways to get it

Use it inside your AI, or download it once.

Library plan

This skill and 2,500+ others, inside your chat

$9/mo cancel anytime, or $59 a year

All 2,500+ skills, prompt packs and agents, loaded the moment you ask
Nothing to download or paste: connect once in Claude, ChatGPT, Claude Code or Cursor
New skills every week and 10 catalog files a month to download

Get Library · $9/mo Try it free for 7 days

Compare Library, AI CRM and Both

Buy once

Just this skill, as a file

$19 one payment

Download after checkout and paste it into any AI chat
One file, no updates, no connector
30-day money-back guarantee

Already on Library or Both? This one is included, no need to buy the file.

Works with

Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.

// ask your assistant

Or let your AI set up this skill for you.

Go to kissmyskills.com/pages/connector and set up the "Golang Developer AI Skill - Callan" skill (handle: callan-go-backend-engineer) for me

Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, 7-day free trial) and loads the skill. What your AI will read →

What you're actually buying

What Callan Does

Callan turns Claude (or ChatGPT, or any AI chat) into a Senior Go Backend Engineer who diagnoses goroutine leaks, channel deadlocks, error-handling shape, and gRPC/REST tradeoffs from real evidence, then hands back a concrete, ready-to-execute plan.

Who It's For

Backend engineers and founders running a production Go service who need concurrency, error handling, or gRPC/REST API design decisions made correctly.

Key Capabilities

Goroutines and channels: lifecycle ownership, the 'sender closes' rule, worker pools, and the classic leak shapes
The sync package: Mutex/RWMutex, WaitGroup, sync.Once, and sync/atomic matched to the actual concurrency problem
Error handling idioms: wrapping with %w, sentinel errors, custom error types, and errors.Is/errors.As instead of string comparison
Project structure and package design: cmd/internal/pkg layout, avoiding import cycles, and constructor-based dependency injection
Performance profiling with pprof: CPU and heap profiles, goroutine dumps, and benchmark results (ns/op, allocs/op) validating a claimed fix
gRPC and REST API design: protobuf versioning, unary vs streaming RPCs, and picking the right protocol per service boundary

How to Use It

Download the skill file and paste the full contents into your Claude Project Instructions (or any AI chat's system prompt). Then describe your problem in plain language and get back a concrete, ready-to-execute plan - no re-explaining context every session. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.

// how to install Under 2 minutes

Four steps. Any AI chat.

01
Download the file
After checkout, the download link lands in your inbox. Save the .skill file: Claude takes it as it is.
02
Open your AI chat
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
03
Add it to your AI
Claude: Settings → Capabilities → Skills, upload the .skill file. ChatGPT, Gemini and others: open the .skill file like a .zip archive and paste SKILL.md into custom instructions or Project instructions.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required.

With Library there is nothing to download. Connect your AI once, then just ask: "Load Golang Developer AI Skill from KissMySkills."

Setup guide → Library · $9/mo →

// faq

Questions about this product

What AI tools does this work with?+

Claude, ChatGPT, or any AI chat that accepts a system prompt or Project Instructions. Claude Projects gives the best results.

How do I install it?+

Paste the SKILL.md contents into your Claude Project Instructions or system prompt. Under 2 minutes, no setup required.

Is this a course or a tool?+

It's a single skill file, not a course. Load it once and Callan applies the same expertise and methodology from the first message of every session.

Can Callan find why my goroutine is leaking?+

Yes. Callan traces every goroutine to its owner and exit path, a channel with no receiver, a context that's never cancelled, an unclosed range, and names the exact leak shape and fix.