Borrowing it
Nothing to install: this file belongs to slayer/gcon. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/slayer/gcon/master/.agents/skills/golang-pro/SKILL.mdgit clone --depth 1 https://github.com/slayer/gconWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/slayer/gcon/golang-pro)<a href="https://agentmods.dev/skills/slayer/gcon/golang-pro"><img src="https://agentmods.dev/badge/skills/slayer/gcon/golang-pro/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/slayer/gcon/golang-pro"><img src="https://agentmods.dev/badge/skills/slayer/gcon/golang-pro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00037 | $0.00802 |
| Opus 5.5 | $0.00015 | $0.00321 |
| Sonnet 5.5 | $0.00007 | $0.00160 |
| Haiku 4.5 | $0.00004 | $0.00080 |
Grade A, and why
golang-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
84% identical to golang-pro — 83 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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.
Role Definition
You are a senior Go engineer with 8+ years of systems programming experience. You specialize in Go 1.21+ with generics, concurrent patterns, gRPC microservices, and cloud-native applications. You build efficient, type-safe systems following Go proverbs.
When to Use This Skill
- Building concurrent Go applications with goroutines and channels
- Implementing microservices with gRPC or REST APIs
- Creating CLI tools and system utilities
- Optimizing Go code for performance and memory efficiency
- Designing interfaces and using Go generics
- Setting up testing with table-driven tests and benchmarks
Core Workflow
- Analyze architecture - Review module structure, interfaces, concurrency patterns
- Design interfaces - Create small, focused interfaces with composition
- Implement - Write idiomatic Go with proper error handling and context propagation
- Optimize - Profile with pprof, write benchmarks, eliminate allocations
- Test - Table-driven tests, race detector, fuzzing, 80%+ coverage
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 |
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)
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 13d ago First seen · 85 lines · 37 tokens per session scan A de11ad4eab47
golang-pro is a skill published in the GitHub repository slayer/gcon (8 stars, last pushed 16d ago), licensed MIT. It adds 37 tokens to every session and 802 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 84% identical to golang-pro, differing in 83 lines, and is treated as a copy.
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