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.
/plugin marketplace add geoffjay/claude-pluginsnpx agentmods add plugins/geoffjay/claude-plugins/golang-developmentgit clone --depth 1 https://github.com/geoffjay/claude-pluginsWrote 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/plugins/geoffjay/claude-plugins/golang-development)<a href="https://agentmods.dev/plugins/geoffjay/claude-plugins/golang-development"><img src="https://agentmods.dev/badge/plugins/geoffjay/claude-plugins/golang-development.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
golang-development 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 2d 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.
What it actually says
{
"name": "golang-development",
"source": "./plugins/golang-development",
"description": "Experienced Go development patterns and tools",
"version": "1.0.0",
"author": {
"name": "Geoff Johnson",
"url": "https://github.com/geoffjay"
},
"homepage": "https://github.com/geoffjay/claude-plugins",
"repository": "https://github.com/geoffjay/claude-plugins",
"license": "MIT",
"keywords": [
"golang",
"go",
"development",
"patterns",
"performance",
"concurrency"
],
"category": "languages",
"strict": false,
"agents": [
"./agents/golang-pro.md",
"./agents/go-architect.md",
"./agents/go-performance.md"
],
"commands": [
"./commands/scaffold.md",
"./commands/review.md",
"./commands/test.md"
],
"skills": [
"./skills/go-patterns",
"./skills/go-concurrency",
"./skills/go-optimization"
]
}What it installs
The manifest is a name and a version. 3 skills travel with it, and installing the plugin installs all of them — 118 tokens a session between them. Each is measured on its own page, and each can be installed alone.
What ships with it
1 file beside marketplace.json#golang-development 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.
- 2d ago First seen · 38 lines scan A 07ef180c8927
golang-development is a plugin published in the GitHub repository geoffjay/claude-plugins (8 stars, last pushed 10mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.
Other plugins, from other repositories
jwx-dev-v4
Guide for developing Go applications with github.com/lestrrat-go/jwx v4 — parse and sign JWTs, work with JWS/JWE/JWK, pick algorithms, and avoid common footguns.
go-ultimate
Opinionated Go development skill — architecture, conventions, production readiness, repo/CI hygiene, review, and MCP/agent patterns.
golang-skills
20 modular skills for idiomatic Go — each under 225 lines, backed by 48 reference files, 8 automation scripts (all with --json, --limit, --force), and 4 asset templates. Covers error handling, naming, testing, concurrency, interfaces, generics, documentation, logging, performance, and more. Activates automatically…
aio-golang-mastery
Write and lint idiomatic Go end-to-end — a 7-tool lint chain (build, vet, golangci-lint, govulncheck, nilaway, deadcode, race) plus reference-grade patterns for concurrency, errors, generics, gRPC, naming/style enforcement (revive 21-rule set, golangci-lint v2 production config), and production hardening.
golang-dev
Comprehensive Go development experience - skills that elevate Claude into the ultimate Golang developer.
go-standards
Stdlib-grounded Go engineering standards for implementation, review, refactoring, and testing.