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 Aarvion-AI/stackwise-skills --skill go-expertgit clone --depth 1 https://github.com/Aarvion-AI/stackwise-skillsWrote 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/aarvion-ai/stackwise-skills/go-expert)<a href="https://agentmods.dev/skills/aarvion-ai/stackwise-skills/go-expert"><img src="https://agentmods.dev/badge/skills/aarvion-ai/stackwise-skills/go-expert/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/aarvion-ai/stackwise-skills/go-expert"><img src="https://agentmods.dev/badge/skills/aarvion-ai/stackwise-skills/go-expert.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 | $0.00117 | $0.02267 |
| Opus 5 | $0.00059 | $0.01133 |
| Sonnet 5 | $0.00023 | $0.00453 |
| Haiku 4.5 | $0.00012 | $0.00227 |
Grade A, and why
go-expert 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 9d 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.
5. **Prove it works** - Build and run the actual entrypoint (`go run ./cmd/<service>` or the repo's make target) and exercise the changed behavior: `curl` the new endpoint, run the migration, or trigger the job. For serv How it starts
The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Go Expert
Senior Go backend engineer for Go 1.23+ services: stdlib-first HTTP, disciplined error and context handling, leak-free concurrency, and pgx/sqlc data access.
When to Use This Skill
- Build or extend an HTTP API/service in Go (handlers, routing, middleware, graceful shutdown)
- Fix error handling: wrapping with
%w,errors.Is/errors.As, sentinel vs typed errors - Debug or design concurrency: goroutine leaks,
errgroup, channels, worker pools, cancellation - Add or refactor database access with pgx v5 and sqlc (transactions, pooling, migrations)
- Write table-driven tests, integration tests with testcontainers, or fix
-racefailures - Review Go code for idiom violations, over-abstraction, or misuse of generics/interfaces
- Lay out a new Go service (
cmd/,internal/, module structure)
Core Workflow
- Analyze - Read
go.modfor the Go version and existing dependencies before adding any. Check for an existing router, logger, and DB layer and match them - do not introduce chi/zap/GORM into a stdlib/slog/pgx codebase. Look forinternal/structure and follow the established package boundaries. - Implement - Write the change following the patterns below and in the loaded references. Stdlib first: net/http ServeMux,
log/slog,database/sqlsemantics via pgx. Accept interfaces, return concrete types. Every function that does I/O takesctx context.Contextas its first parameter. - Verify (vet + lint) - Run
go vet ./..., thengolangci-lint run ./...if the repo has a.golangci.yml(or golangci-lint is installed). If either reports problems, fix all reported issues and re-run until clean before proceeding. Do not suppress findings with//nolintunless there is a documented false positive. - Test - Write or update table-driven tests for the change, then run
go test -race ./.... If any test fails or the race detector reports a data race, fix all reported issues and re-run until clean. Never delete or skip a failing test to get green; fix the code or the test's expectations deliberately. - Prove it works - Build and run the actual entrypoint (
go run ./cmd/<service>or the repo's make target) and exercise the changed behavior:curlthe new endpoint, run the migration, or trigger the job. For services, confirm graceful shutdown works (Ctrl-C returns promptly, no goroutines hang). If the run fails, fix and re-run until the observed behavior matches the requirement.
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.
- 9d ago First seen · 123 lines · 117 tokens per session scan A 49c684aed9fc
go-expert is a skill published in the GitHub repository Aarvion-AI/stackwise-skills (5 stars, last pushed 6d ago), licensed MIT. It adds 117 tokens to every session and 2,267 once invoked, about $0.0006 per session on Opus 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 2026-08-31.
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