samber_cc-skills-golang/README.md

Agent Skills for production-ready Golang projects

AI agent skills are reusable instruction sets that extend your coding assistant with domain-specific expertise, loaded on demand so they don't bloat your context. This repository covers Go-specific skills only (language, testing, security, observability, etc.); for dev workflow skills (git conventions, CI/CD, PR reviews) you'll want to add a separate skills plugin.

For generic skills, please visit cc-skills.

Important

Bootstrapped with Claude Code by distilling my Go project commits. Edited, tested, reviewed and reworked by a human.

No AI slop here. AI-made skills are useless.

🚀 How to use

Install with skills CLI (universal, works with any Agent Skills-compatible tool):

npx skills add https://github.com/samber/cc-skills-golang --all
# or a single skill:
npx skills add https://github.com/samber/cc-skills-golang --skill golang-performance

Claude Code

/plugin marketplace add samber/cc
/plugin install cc-skills-golang@samber

Openclaw

Copy skills into the cross-client discovery directory:

git clone https://github.com/samber/cc-skills-golang.git ~/.openclaw/skills/cc-skills-golang
# or in workspace:
git clone https://github.com/samber/cc-skills-golang.git ~/.openclaw/workspace/skills/cc-skills-golang

Gemini CLI

gemini extensions install https://github.com/samber/cc-skills-golang

Update with gemini extensions update cc-skills-golang.

Cursor

Copy skills into the cross-client discovery directory:

git clone https://github.com/samber/cc-skills-golang.git  ~/.cursor/skills/cc-skills-golang

Cursor auto-discovers skills from .agents/skills/ and .cursor/skills/.

Copilot

Copy skills into the cross-client discovery directory:

/plugin install https://github.com/samber/cc-skills-golang
# or
git clone https://github.com/samber/cc-skills-golang.git ~/.copilot/skills/cc-skills-golang

Copilot auto-discovers skills from .copilot/skills/.

OpenCode

Copy skills into the cross-client discovery directory:

git clone https://github.com/samber/cc-skills-golang.git ~/.agents/skills/cc-skills-golang

OpenCode auto-discovers skills from .agents/skills/, .opencode/skills/, and .claude/skills/.

Codex (OpenAI)

Clone into the cross-client discovery path:

git clone https://github.com/samber/cc-skills-golang.git ~/.agents/skills/cc-skills-golang

Codex auto-discovers skills from ~/.agents/skills/ and .agents/skills/. Update with cd ~/.agents/skills/cc-skills-golang && git pull.

Antigravity

Clone and symlink into the cross-client discovery path:

git clone https://github.com/samber/cc-skills-golang.git ~/.antigravity/skills/cc-skills-golang

Update with cd ~/.antigravity/skills/cc-skills-golang && git pull.

🧩 Skills

These skills are designed as atomic, cross-referencing units. A skill may reference conventions defined in another (e.g. error-handling rules that affect logging live in golang-error-handling, not golang-observability). Installing only a subset will give you a partial and potentially inconsistent view of the guidelines. For best results, install all general-purpose skills together.

                         ┌────────────────────────────────────────┐
                         │             Golang Skills              │
                         └──────────────────┬─────────────────────┘
                                            │
   ┌─────────────────┬──────────────────────┼──────────────────────┐
   ▼                 ▼                      ▼                      ▼
┌──────────────┐ ┌──────────────┐ ┌─────────────────┐ ┌──────────────────────┐
│ Code Quality │ │ Arch & Design│ │    QA & Perf    │ │    Project Start     │
├──────────────┤ ├──────────────┤ ├─────────────────┤ ├──────────────────────┤
│ code-style   │ │ design-patt  │ │ testing         │ │ project-layout       │
│ naming       │ │ concurrency  │ │ benchmark       │ │ popular-libs         │
│ error-handl  │ │ context      │ │ performance     │ │ cli                  │
│ safety       │ │ dep-inject   │ │ troubleshoot    │ │ continuous-integ.    │
│ structs-iface│ │ data-structs │ │ observability   │ │ stay-updated         │
│ documentation│ │ database     │ │                 │ │ dep-management       │
│ lint         │ │ modernize    │ │                 │ │ gopls                │
│ security     │ │ refactoring  │ │                 │ │ pkg-go-dev           │
└──────────────┘ └──────────────┘ └─────────────────┘ └──────────────────────┘

    ┌─────────────────────────────────────────────────────────────────────────┐
    │                      Framework / Library Skills                         │
    ├──────────────┬────────────────┬──────────────┬─────────────┬───────────┤
    │   APIs       │      DI        │  Frameworks  │  samber/*   │  Testing  │
    ├──────────────┼────────────────┼──────────────┼─────────────┼───────────┤
    │ grpc         │ google-wire    │ spf13-cobra  │ samber-lo   │ stretchr- │
    │ graphql      │ uber-dig       │ spf13-viper  │ samber-mo   │  testify  │
    │ swagger      │ uber-fx        │              │ samber-ro   │           │
    │              │                │              │ samber-do   │           │
    │              │                │              │ samber-hot  │           │
    │              │                │              │ samber-slog │           │
    │              │                │              │ samber-oops │           │
    └──────────────┴────────────────┴──────────────┴─────────────┴───────────┘

• ⭐️ Recommended
• ✅ Published
• 👷 Work in progress
• ❌ To-do
• ⚡ Command available
• 🧠 Ultrathink automatically
• 🤖 Ultracode automatically
• ⚙️ Overridable (see doc below)
• Description (tok): weight of the description field from YAML frontmatter, always loaded into Claude's context for skill triggering
• SKILL.md (tok): weight of the full SKILL.md file loaded when the skill triggers
• Directory (tok): weight of all files in the skill directory (SKILL.md + referenced markdown files)

General purpose:

	Skill	Flags	Error rate gap	Description (tok)	SKILL.md (tok)	Directory (tok)
⭐️	✅ golang-code-style	⚡ 🤖 ⚙️	-40%	114	2,358	2,974
⭐️	✅ golang-data-structures	⚡	-39%	93	2,608	6,327
⭐️	✅ golang-database	⚡ ⚙️	-38%	97	2,721	7,243
⭐️	✅ golang-design-patterns	⚡ ⚙️	-37%	80	2,694	9,400
⭐️	✅ golang-documentation	⚡ 🤖 ⚙️	-53%	75	3,094	11,193
⭐️	✅ golang-error-handling	⚡ 🤖 ⚙️	-26%	141	1,734	4,693
⭐️	✅ golang-how-to	⚡	—	183	4,196	15,197
⭐️	✅ golang-modernize	⚡ 🤖	-61%	68	2,899	9,212
⭐️	✅ golang-naming	⚡ ⚙️	-23%	159	3,031	7,399
⭐️	✅ golang-refactoring	⚡ 🧠 🤖 ⚙️	—	245	3,835	20,330
⭐️	✅ golang-safety	⚡	-58%	78	2,614	5,384
⭐️	✅ golang-testing	⚡ 🧠 🤖 ⚙️	-32%	115	4,270	7,377
⭐️	✅ golang-troubleshooting	⚡ 🧠 🤖	-32%	127	2,929	16,612
⭐️	✅ golang-security	⚡ 🧠 🤖	-32%	85	3,187	21,623
	✅ golang-benchmark	⚡ 🧠	-50%	102	3,061	30,243
	✅ golang-cli	⚡	-43%	125	2,338	6,153
	✅ golang-concurrency	⚡ 🤖 ⚙️	-39%	72	2,199	6,829
	✅ golang-context	⚡ ⚙️	-34%	82	1,211	4,021
	✅ golang-continuous-integration	⚡	-59%	82	3,336	12,598
	✅ golang-dependency-injection	⚡ 🤖 ⚙️	-47%	178	3,016	5,287
	✅ golang-dependency-management	⚡	-54%	77	2,362	5,500
	✅ golang-structs-interfaces	⚡ ⚙️	-35%	111	3,076	3,076
	✅ golang-lint	⚡ 🤖	-41%	98	1,877	6,295
	✅ golang-observability	⚡ 🤖 ⚙️	-37%	163	3,118	18,605
	✅ golang-performance	⚡ 🧠 🤖	-39%	129	2,226	18,226
	✅ golang-gopls	⚡	—	219	2,317	12,299
	✅ golang-pkg-go-dev	⚡	—	230	3,423	5,237
	✅ golang-popular-libraries	⚡	-30%	51	1,074	4,543
	✅ golang-project-layout	⚡	-38%	69	1,692	5,907
	✅ golang-stay-updated	⚡	-56%	44	1,802	1,802

Tools:

Skill	Flags	Error rate gap	Description (tok)	SKILL.md (tok)	Directory (tok)
✅ golang-google-wire	⚡	-16%	122	2,670	7,400
✅ golang-graphql		-16%	76	3,070	7,941
✅ golang-grpc	⚡	-41%	70	2,341	5,157
✅ golang-spf13-cobra	⚡	—	176	2,580	7,351
✅ golang-spf13-viper	⚡	—	170	2,551	7,098
✅ golang-swagger	⚡	—	144	2,342	3,347
✅ golang-uber-dig	⚡	-10%	107	2,585	6,257
✅ golang-uber-fx	⚡	-5%	118	2,825	7,060
✅ golang-samber-do	⚡	-81%	71	2,145	3,660
✅ golang-samber-hot	⚡	-54%	119	1,986	7,416
✅ golang-samber-lo	⚡	-40%	166	2,610	10,288
✅ golang-samber-mo	⚡ 🧠	-48%	82	2,967	11,382
✅ golang-samber-oops	⚡	-59%	70	2,544	2,856
✅ golang-samber-ro	⚡ 🧠	-50%	153	2,976	11,192
✅ golang-samber-slog	⚡	-19%	119	3,120	9,842
❌ golang-temporal		—	0	0	0
✅ golang-stretchr-testify	⚡	-47%	92	1,858	2,677

🧪 Skill evaluations

	With Skill	Without Skill	Delta
Overall	3315/3395 (98%)	1915/3395 (56%)	+41pp

See EVALUATIONS.md for the full per-skill breakdown.

📖 Skills description

Code Quality

golang-code-style

Go code formatting and conventions. gofmt, goimports, linting rules, comment conventions, and project-level style consistency. Overridable by company skills.

golang-documentation

Go documentation standards. Package docs, godoc conventions, code comments, example functions, README structure, and API reference generation. Overridable.

golang-error-handling

Go error handling best practices. Error creation, wrapping with fmt.Errorf and errors.Is/As, sentinel errors, custom error types, error codes, and panic recovery. Overridable.

golang-lint

Go linting best practices and golangci-lint configuration. Presets, custom rules, CI integration, inline suppression, and output interpretation.

golang-naming

Go naming conventions across all identifier types. Packages, constructors, structs, interfaces, constants, errors, receivers, acronyms, test functions. Covers MixedCaps rules, Get-prefix, and utils/helpers anti-patterns. Overridable.

golang-safety

Defensive Go coding. Prevents panics, silent data corruption, and runtime bugs. nil safety, append aliasing, map concurrent access, float comparison, zero-value design, numeric overflow.

golang-security

Go security best practices. Injection prevention (SQL, command, XSS), cryptography, filesystem/network safety, secrets management, cookie security, and tool configuration. Audit and review modes.

golang-structs-interfaces

Go struct and interface design. Composition, embedding, type assertions, interface segregation, struct tags (JSON/YAML/DB), pointer vs value receivers. Overridable.

Architecture & Design

golang-concurrency

Go concurrency patterns. Goroutines, channels, sync primitives, context cancellation, worker pools, fan-out/fan-in, pipelines. Overridable.

golang-context

Idiomatic context.Context usage. Creation, cancellation, timeouts, values, propagation patterns, and common anti-patterns. Overridable.

golang-data-structures

Go data structures internals and usage. Slices (capacity growth, append aliasing), maps, channels, sync primitives, and when to use each.

golang-database

Go database access patterns. Parameter binding, connection pooling, transactions, migrations, sqlboiler/sqlc code generation, query builders. Overridable.

golang-dependency-injection

Dependency injection patterns in Go. Constructor injection, interface-based DI, wire/dig/fx comparison, and when DI is worth the complexity. Overridable.

golang-design-patterns

Idiomatic Go design patterns. Functional options, constructors, builder pattern, middleware chains, circuit breaker, and architecture guides with file trees and code. Overridable.

golang-modernize

Modernize Go code to use recent language features. Range-over-int, min/max builtins, iterators, slices/maps/cmp/slog stdlib packages, testing patterns (t.Context, b.Loop, synctest), and tooling upgrades.

golang-refactoring

Safe, at-scale refactoring process for existing Go code. Coverage-adaptive safety net, tool-driven behavior-preserving transforms (gopls Rename/Inline/Extract, gofmt -r, eg, gopatch), the Fowler catalog mapped to Go, breaking import cycles, type-alias gradual code repair, and a human-in-the-loop workflow of staged PRs on a refactoring branch.

QA & Performance

golang-benchmark

Go benchmarking, profiling, and performance measurement. pprof, trace, CPU/memory/block profiles, flame graphs, benchmark comparison (benchstat), continuous profiling.

golang-observability

Go production observability. Structured logging (slog), Prometheus metrics, OpenTelemetry tracing, pprof profiling, RUM tracking, alerting, Grafana dashboards. Overridable.

golang-performance

Go performance optimization. Allocation reduction, CPU efficiency, memory layout, GC tuning, pooling, caching, hot-path optimization. Review and hot-path modes.

golang-testing

Production-ready Go tests. Table-driven tests, fuzzing, fixtures, goroutine leak detection (goleak), snapshot testing, code coverage, integration tests, parallel tests. Overridable.

golang-troubleshooting

Systematic Go debugging methodology. Common pitfalls, test-driven debugging, pprof capture, Delve debugger, race detection, GODEBUG tracing, production debugging.

Project Setup

golang-cli

Go CLI application development. Project layout, exit codes, signal handling, I/O patterns, argument parsing, and terminal UX.

golang-continuous-integration

CI/CD pipeline configuration for Go projects using GitHub Actions. Build, test, lint, and release workflows.

golang-dependency-management

Go module dependency strategies. go.mod conventions, versioning, replace directives, tool dependencies, and multi-module workspaces.

golang-gopls

Semantic code intelligence for your local build via gopls, the official Go language server. Go-to-definition, find references, call/implementation hierarchy, workspace symbol search, diagnostics, safe rename, and refactors (extract/inline/fill/rewrite). Reachable via gopls's own MCP server, Claude Code's native LSP tool, or the gopls CLI.

golang-pkg-go-dev

Go package and module exploration via godig, a pkg.go.dev API client (CLI + MCP server). Package docs, API references, symbols, code examples, versions, importers, licenses, and known vulnerabilities. Prefer over Context7 for Go packages.

golang-popular-libraries

Curated recommendations for production-ready Go libraries and frameworks. When the stdlib is enough vs when to reach for a package.

golang-project-layout

Go project structure and workspace setup. cmd/internal/pkg conventions, monorepo layout, CLI project structure, and when to keep things flat.

golang-stay-updated

Resources to stay current with Go. Official channels, community hubs, key people to follow, and learning resources.

APIs

golang-graphql

GraphQL API development in Go using gqlgen/graphql-go. Schema definition, resolvers, subscriptions, dataloader, and federation.

golang-grpc

gRPC in Go. Protobuf organization, service definitions, streaming, interceptors, error codes, and code generation workflow.

golang-swagger

OpenAPI/Swagger docs with swaggo/swag. Annotation comments, code generation, framework integrations (gin, echo, fiber, chi), security definitions.

Dependency Injection

golang-google-wire

Compile-time dependency injection with google/wire. Provider sets, injector generation, wire.Build, and structured DI patterns.

golang-uber-dig

Reflection-based DI with uber-go/dig. Provide/Invoke, dig.In/dig.Out, named values, value groups, optional dependencies, and Decorate.

golang-uber-fx

Application framework with uber-go/fx. fx.New, fx.Provide/Invoke, fx.Module, lifecycle hooks, fx.Annotate, fx.Decorate, signal-aware Run.

Frameworks

golang-spf13-cobra

CLI command trees with spf13/cobra. Command hierarchy, RunE hooks, flag management, shell completion, usage templates, and testing with SetArgs.

golang-spf13-viper

Layered configuration with spf13/viper. Flag > env > file > KV > default precedence, BindPFlag, hot reload, test isolation, and remote KV integration.

samber/*

golang-samber-do

Dependency injection with samber/do. Type-safe service containers, lifecycle management, scopes, health checks, and graceful shutdown.

golang-samber-hot

In-memory caching with samber/hot. 9 eviction algorithms (LRU, LFU, TinyLFU, W-TinyLFU, S3FIFO, ARC, SIEVE...), TTL, loaders, sharding, stale-while-revalidate, Prometheus metrics.

golang-samber-lo

Functional programming helpers with samber/lo. 500+ type-safe generic functions for slices, maps, channels, strings. Immutable (lo), parallel (lop), mutable (lom), iterators (loi), SIMD.

golang-samber-mo

Monadic types with samber/mo. Option, Result, Either, Future, IO, Task, State for type-safe nullable values, error handling, and functional composition.

golang-samber-oops

Structured error handling with samber/oops. Error builders, stack traces, error codes, context attributes, public vs developer messages, panic recovery, and APM integration.

golang-samber-ro

Reactive streams with samber/ro. 150+ type-safe operators, cold/hot observables, 5 subject types, 40+ plugins, automatic backpressure, and Go context integration.

golang-samber-slog

Structured logging pipeline with samber/slog-**** packages. Multi-handler routing (slog-multi), sampling, formatting, HTTP middleware, and 20+ backend sinks.

Testing

golang-stretchr-testify

Testing with stretchr/testify. assert, require, mock, and suite packages. Assertions, mock expectations, argument matchers, suite lifecycle, and custom matchers.

🕵 Use in CI for AI-driven reviews

Add AI agents as PR reviewers alongside traditional static analysis. When configured with this skill plugin, the agent applies the relevant Go skills per review area — catching architectural drift, logic bugs, and concurrency hazards that linters cannot detect.

See GOLANG-AI-DRIVEN-REVIEW.md for full setup instructions (Claude Code Action and GitHub Copilot).

🎯 Tuning Skill Triggers

If a skill triggers too often or not often enough, please open an issue suggesting a description change. The description field in SKILL.md frontmatter is the primary triggering mechanism — small wording adjustments can significantly improve trigger accuracy. Some SKILL.md files might have a When to use section which is another level of exclusion. Finally, SKILL.md files are an entrypoint for lazy loading references with deep knowledge located in references/.

🔄 Overlap

Claude reports very little overlap between skills in this repo, thanks to cross-reference. I suggest enabling most of the skills and leveraging lazy loading. The recommended ⭐️ skills load ~1,100 tokens of descriptions at startup; full skill content is only pulled in when relevant. Note:

• I estimate that 50% of golang-naming and golang-code-style overlap with linters (golangci-lint).
• A large part of the security rules in golang-security have been distilled from the Bearer (SAST) checklist. The skill is still useful for methodology.
• If your team has its own conventions, create a company skill and declare the override explicitly near the top of its body: This skill supersedes samber/cc-skills-golang@golang-naming skill for [company] projects. Skills marked ⚙️ in the table above support this mechanism.

✍️ Contribute

• 100 tokens per skill description - what? when to use this skill?
• 1.000–2.500 tokens per SKILL.md — keep the main file focused on essentials
• Use secondary markdown files for depth — reference them from SKILL.md with relative links (e.g., [Logging](./logging.md)). Claude reads these on demand when the topic is relevant, so they don't count against the context budget until needed
• Up to 10.000 tokens for full skill and secondary files
• 2–4 skills loaded simultaneously in a typical session — design skills to coexist
• Stay below ~10k tokens of total loaded SKILL.md anytime to avoid degrading response quality

For more guidelines, please check CLAUDE.md.

💫 Fuel the Revolution

• ⭐️ Star this repo - Your star powers the caffeine engine!
• ☕️ Buy me a coffee - I'll literally use it to build more skills while drinking actual coffee

📝 License

Copyright © 2026 Samuel Berthe.

This project is under MIT license.