Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add hoangatg/ai-agent-toolkit --skill golang-progit clone --depth 1 https://github.com/hoangatg/ai-agent-toolkitWrote 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/hoangatg/ai-agent-toolkit/golang-pro)<a href="https://agentmods.dev/skills/hoangatg/ai-agent-toolkit/golang-pro"><img src="https://agentmods.dev/badge/skills/hoangatg/ai-agent-toolkit/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/hoangatg/ai-agent-toolkit/golang-pro"><img src="https://agentmods.dev/badge/skills/hoangatg/ai-agent-toolkit/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 | $0.00035 | $0.00792 |
| Opus 5 | $0.00017 | $0.00396 |
| Sonnet 5 | $0.00007 | $0.00158 |
| Haiku 4.5 | $0.00003 | $0.00079 |
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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Golang Pro
Simple, fast, and concurrent. Go gets out of your way.
1. Project Structure
Standard Layout
myapp/
├── cmd/ # Entry points
│ └── myapp/
│ └── main.go
├── internal/ # Private packages
│ ├── handler/
│ ├── service/
│ └── repository/
├── pkg/ # Public packages
├── api/ # API definitions (OpenAPI, proto)
├── go.mod
└── go.sum
2. Concurrency Patterns
Pattern Selection
| Pattern | Use When |
|---|---|
| Goroutine + channel | Producer-consumer, pipeline |
| WaitGroup | Wait for N tasks to complete |
| Mutex | Protect shared state |
| Context | Cancellation, timeouts, values |
| errgroup | Concurrent tasks with error handling |
| semaphore | Limit concurrent goroutines |
Channel Patterns
| Pattern | Description |
|---|---|
| Fan-out | One producer, many consumers |
| Fan-in | Many producers, one consumer |
| Pipeline | Chain of processing stages |
| Done channel | Cancellation signal |
3. Error Handling
Principles
| Principle | Application |
|---|---|
| Explicit errors | Return error as last return value |
| Wrap with context | fmt.Errorf("parsing config: %w", err) |
| Custom errors | Implement error interface |
| errors.Is/As | Type-safe error checking |
| Don't panic | Reserve for truly unrecoverable |
4. Interface Design
| Principle | Application |
|---|---|
| Small interfaces | 1-3 methods ideal |
| Accept interfaces | Function params as interfaces |
| Return structs | Function returns as concrete types |
| Implicit implementation | No implements keyword needed |
| io.Reader/Writer | Compose with standard interfaces |
5. Performance
| Technique | When |
|---|---|
| sync.Pool | Reduce GC pressure for temp objects |
| Buffered channels | Reduce goroutine blocking |
| Strings.Builder | Efficient string concatenation |
| Pre-allocate slices | make([]T, 0, expectedCap) |
| pprof | Profile CPU, memory, goroutines |
| Benchmarks | func BenchmarkX(b *testing.B) |
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.
- 7d ago First seen · 122 lines · 35 tokens per session scan A e6a0be945a64
golang-pro is a skill published in the GitHub repository hoangatg/ai-agent-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 35 tokens to every session and 792 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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