samber/cc-skills-golang is a collection of reusable agent instructions for Go development, covering areas such as the language, testing, security, and observability. It is for coding agents assisting with production-oriented Golang projects. The catalogue entries are its Go-specific skills, rule, plugin, and instruction.
Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/samber/cc-skills-golangnpx agentmods add skills/samber/cc-skills-golang/golang-benchmarkWrote 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/samber/cc-skills-golang/golang-benchmark)<a href="https://agentmods.dev/skills/samber/cc-skills-golang/golang-benchmark"><img src="https://agentmods.dev/badge/skills/samber/cc-skills-golang/golang-benchmark/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/samber/cc-skills-golang/golang-benchmark"><img src="https://agentmods.dev/badge/skills/samber/cc-skills-golang/golang-benchmark.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00104 | $0.03153 |
| Opus 5.5 | $0.00042 | $0.01261 |
| Sonnet 5.5 | $0.00021 | $0.00631 |
| Haiku 4.5 | $0.00010 | $0.00315 |
Grade A, and why
golang-benchmark scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(golangci-lint:*) Bash(git:*) Agent WebFetch Bash(benchstat:*) Bash(benchdiff:*) Bash(cob:*) Bash(gobenchdata:*) Bash(curl:*) mcp__context7__resolve-library-id mcp_ How it starts
The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Persona: You are a Go performance measurement engineer. You never draw conclusions from a single benchmark run — statistical rigor and controlled conditions are prerequisites before any optimization decision.
Thinking mode: Reason as thoroughly as possible for benchmark analysis, profile interpretation, and performance comparison tasks — deep reasoning prevents misinterpreting profiling data and ensures statistically sound conclusions. On Claude Code, use ultrathink to trigger extended thinking explicitly.
Dependencies:
- benchstat:
go install golang.org/x/perf/cmd/benchstat@latest
Go Benchmarking & Performance Measurement
Performance improvement does not exist without measures — if you can measure it, you can improve it.
This skill covers the full measurement workflow: write a benchmark, run it, profile the result, compare before/after with statistical rigor, and track regressions in CI. For optimization patterns to apply after measurement, → See samber/cc-skills-golang@golang-performance skill. For pprof setup on running services, → See samber/cc-skills-golang@golang-troubleshooting skill.
Writing Benchmarks
File and Ordering Conventions
Benchmark functions live in a _bench_test.go file named after the source file under benchmark, not after the individual function — parser.go -> parser_bench_test.go, containing BenchmarkParse, BenchmarkEncode, etc., not a separate benchmarkparse_test.go per function.
- Keeping benchmarks in their own file (instead of mixed into
parser_test.go) keepsgo test -bench=. ./pkg/parseroutput free of unrelatedTest*noise. - It separates fixtures sized for measurement (large inputs, long-lived setup) from those sized for correctness — the two rarely share the same shape.
- The file still follows Go's one-test-file-per-source-file convention (→ See
samber/cc-skills-golang@golang-testingskill), just with the_benchsuffix marking its narrower purpose.
Order Benchmark* functions inside parser_bench_test.go to mirror the order of the functions/methods they measure in parser.go — a reader comparing the two files top to bottom should find BenchmarkParse at the same relative position as Parse.
What ships with it
9 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.
- 1mo ago Changed · +6 lines 35f74a20f926
- 1mo ago Changed c3e2eb30ce10
- 1mo ago First seen · 201 lines · 104 tokens per session scan A 0eb46a4a4ae7
golang-benchmark is a skill published in the GitHub repository samber/cc-skills-golang (3,684 stars, last pushed 4d ago), licensed MIT. It adds 104 tokens to every session and 3,153 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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