Go Backend Engineer Claude Skill

Name: Callan - Golang Developer AI Skill
Brand: KissMySkills
Price: 29.0 USD
Availability: InStock

Callan - Golang Developer AI Skill

$29.00

$29.00 $43.99

Callan - Golang Developer AI Skill

$29.00 this skill vs $43.99 hiring a senior Go backend contractor

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

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Choose how to get it

Buy once $29 This one skill as a file. Yours forever, works in any AI chat. All-Access whole library $8.25/mo billed yearly All 1,000+ skills in the marketplace. Your AI picks the right one and loads it by itself. Claude, ChatGPT, Claude Code, Cursor · or $19 month to month

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⚡ Instant download ∞ Keep forever ✎ Written by us

Add it once. Your AI works like a specialist.

Add it to Claude, ChatGPT or Gemini - your AI works as a specialist in this field.

Instant download · 30-day money-back guarantee. Pay once, keep forever - no subscription. Written and tested by us, never scraped from GitHub. Refund policy

Ask Callan something hard.

📎 callan-go-backend-engineer.md LOADED ✓

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 · AS CALLAN, GOLANG DEVELOPER 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.

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You don't read it. Your AI does.

Add the skill file to Claude, ChatGPT or Gemini once. From then on it works as a specialist in this field and answers as Callan from the very next message.

Buy once and the file is yours to keep forever. Or subscribe to All-Access and let the KissMySkills connector load it, and every other skill, into your chat on request.

// 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

A senior Go backend contractor bills $105+/hr, the complete skill is yours forever.

// what's inside

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 file anywhere on your device.
02
Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot - whichever one you already use.
03
Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required. No subscription. Pay once, keep forever.

// compatible with

Works with every major AI chat.

Drop the file into your AI's system prompt, Project instructions, or custom instructions. No setup. No code. No vendor lock-in.

// 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.

Do I have to read it myself?+

No. The file is written for your AI to read, not for you. Upload it or paste it in once and the AI takes on the role. After that you just ask it questions the way you normally would. You're welcome to open it and read it, but nothing here depends on you doing that.

Is this a physical book?+

No, it's digital. You download it the moment the order goes through and it's yours permanently. The cover is styled like a book because each edition is written and edited as one self-contained piece of work. The reading part is your AI's job, not yours.