Registry indexed
Comprehensive documentation guide for Golang projects, covering godoc comments, README, CONTRIBUTING, CHANGELOG, Go Playground, Example tests, API docs, and llms.txt. Use when writing or reviewing doc comments, documentation, adding code examples, setting up doc sites, or discuss
Comprehensive documentation guide for Golang projects, covering godoc comments, README, CONTRIBUTING, CHANGELOG, Go Playground, Example tests, API docs, and llms.txt. Use when writing or reviewing doc comments, documentation, adding code examples, setting up doc sites, or discussing documentation best practices. Triggers for both libraries and applications/CLIs.
Source documentation, not instructions for this website. Review permissions before running any commands.
Persona: You are a Go technical writer and API designer. You treat documentation as a first-class deliverable — accurate, example-driven, and written for the reader who has never seen this codebase before.
Orchestration mode: Fan out the sub-agents described in the "Parallelizing Documentation Work" section (one per package, or one per doc layer/file) for documenting or auditing documentation across a large codebase, and merge their output into the final docs. On Claude Code, use ultracode to opt into multi-agent orchestration explicitly.
Modes:
Community default. A company skill that explicitly supersedes
samber/cc-skills-golang@golang-documentationskill takes precedence.
Write documentation that serves both humans and AI agents. Good documentation makes code discoverable, understandable, and maintainable.
See samber/cc-skills-golang@golang-naming skill for naming conventions in doc comments. See samber/cc-skills-golang@golang-testing skill for Example test functions. See samber/cc-skills-golang@golang-project-layout skill for where documentation files belong.
Apply to every piece of documentation you write or review:
Concision — write the shortest version that carries the idea. Remove ornament and hollow transitions. Never drop facts, warnings, or user-requested depth.
Intent over paraphrase — code shows what happens; docs explain why it exists, when to use it, what constraints apply. A comment that only restates the signature wastes the reader's time.
No invented context — omit unsupported rationale, marketing claims (seamlessly, robust, enterprise-grade), or future promises. Leave gaps visible rather than filling with speculation.
Preserve meaning when editing — keep modality intact (must/should/may are different obligations). Preserve conditions, warnings, required actions. A cleaner sentence that changes obligations is wrong.
Anti-patterns to remove on sight: pure-paraphrase comments that start with the name but add nothing (godoc requires the name as prefix — what it forbids is stopping there), signature restatement, marketing vocabulary, groundless future claims (future extensibility, easy to scale), hollow transitions (it's worth noting that, in conclusion), template padding that adds no information.
Before documenting, determine the project type — it changes what documentation is needed:
Library — no main package, meant to be imported by other projects:
ExampleXxx functions, playground demos, pkg.go.dev renderingApplication/CLI — has main package, cmd/ directory, produces a binary or Docker image:
Both apply: function comments, README, CONTRIBUTING, CHANGELOG.
Architecture docs: for complex projects, use the docs/ directory and design description docs.
Every Go project needs these (ordered by priority):
| Item | Required | Library | Application |
|---|---|---|---|
| Doc comments on exported functions | Yes | Yes | Yes |
Package comment (// Package foo...) — MUST exist | Yes | Yes | Yes |
| README.md | Yes | Yes | Yes |
| LICENSE | Yes | Yes | Yes |
| Getting started / installation | Yes | Yes | Yes |
| Working code examples | Yes | Yes | Yes |
| CONTRIBUTING.md | Recommended | Yes | Yes |
| CHANGELOG.md or GitHub Releases | Recommended | Yes | Yes |
Example test functions (ExampleXxx) | Recommended | Yes | No |
| Go Playground demos | Recommended | Yes | No |
| API docs (e.g., OpenAPI) | If applicable | Maybe | Maybe |
| Documentation website | Large projects | Maybe | Maybe |
| llms.txt | Recommended | Yes | Yes |
A private project might not need a documentation website, llms.txt, Go Playground demos...
When documenting a large codebase with many packages, use up to 5 parallel sub-agents for independent tasks:
ExampleXxx test functions for multiple packages simultaneouslyEvery exported function and method MUST have a doc comment. Document complex internal functions too. Skip test functions.
The comment starts with the function name and a verb phrase. Focus on why and when, not restating what the code already shows. The code tells you what happens — the comment should explain why it exists, when to use it, what constraints apply, and what can go wrong. Include parameters, return values, error cases, and a usage example:
// CalculateDiscount computes the final price after applying tiered discounts.
// Discounts are applied progressively based on order quantity: each tier unlocks
// additional percentage reduction. Returns an error if the quantity is invalid or
// if the base price would result in a negative value after discount application.
//
// Parameters:
// - basePrice: The original price before any discounts (must be non-negative)
// - quantity: The number of units ordered (must be positive)
// - tiers: A slice of discount tiers sorted by minimum quantity threshold
//
// Returns the final discounted price rounded to 2 decimal places.
// Returns ErrInvalidPrice if basePrice is negative.
// Returns ErrInvalidQuantity if quantity is zero or negative.
//
// Play: https://go.dev/play/p/abc123XYZ
//
// Example:
//
// tiers := []DiscountTier{
// {MinQuantity: 10, PercentOff: 5},
// {MinQuantity: 50, PercentOff: 15},
// {MinQuantity: 100, PercentOff: 25},
// }
// finalPrice, err := CalculateDiscount(100.00, 75, tiers)
// if err != nil {
// log.Fatalf("Discount calculation failed: %v", err)
// }
// log.Printf("Ordered 75 units at $100 each: final price = $%.2f", finalPrice)
func CalculateDiscount(basePrice float64, quantity int, tiers []DiscountTier) (float64, error) {
// implementation
}
For the full comment format, deprecated markers, interface docs, and file-level comments, see Code Comments — how to document packages, functions, interfaces, and when to use Deprecated: markers and BUG: notes.
README SHOULD follow this exact section order. Copy the template from templates/README.md:
# headingCommon badges for Go projects:
[](https://go.dev/) [](./LICENSE) [](https://github.com/{owner}/{repo}/actions) [](https://codecov.io/gh/{owner}/{repo}) [](https://goreportcard.com/report/github.com/{owner}/{repo}) [](https://pkg.go.dev/github.com/{owner}/{repo})
For the full README guidance and application-specific sections, see Project Docs.
CONTRIBUTING.md — Help contributors get started in under 10 minutes. Include: prerequisites, clone, build, test, PR process. If setup takes longer than 10 minutes, then you should improve the process: add a Makefile, docker-compose, or devcontainer to simplify it. See Project Docs.
Changelog — Track changes using Keep a Changelog format or GitHub Releases. Copy the template from templates/CHANGELOG.md. Each entry answers what changed for the reader — internal refactors without user-visible impact belong in commit history. Don't inflate a fixed edge case into a broad "reliability improvement" claim. See Project Docs.
For Go libraries, add these on top of the basics:
// Play: https://go.dev/play/p/xxx. Use a Go Playground integration when one is available to create and share playground URLs.func ExampleXxx() in _test.go files. These are executable documentation verified by go test.go doc locally to preview; to inspect how a published package renders its docs, symbols, and examples, → See samber/cc-skills-golang@golang-pkg-go-dev skill.See Library Documentation for details.
For Go applications/CLIs:
go install, Docker images, Homebrew...--help comprehensive; it's the primary documentationSee Application Documentation for details.
If your project exposes an API:
| API Style | Format | Tool
name: golang-documentation
description: "Comprehensive documentation guide for Golang projects, covering godoc comments, README, CONTRIBUTING, CHANGELOG, Go Playground, Example tests, API docs, and llms.txt. Use when writing or reviewing doc comments, documentation, adding code examples, setting up doc sites, or discussing documentation best practices. Triggers for both libraries and applications/CLIs."
user-invocable: true
license: MIT
compatibility: Designed for Claude Code, Codex or similar harness, and for projects using Golang.
metadata:
author: samber
version: "1.2.0"
openclaw:
emoji: "📝"
homepage: https://github.com/samber/cc-skills-golang
requires:
bins:
- go
install: []
allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(golangci-lint:*) Bash(git:*) Agent WebFetch
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- "**/*.go"---
name: golang-documentation
description: "Comprehensive documentation guide for Golang projects, covering godoc comments, README, CONTRIBUTING, CHANGELOG, Go Playground, Example tests, API docs, and llms.txt. Use when writing or reviewing doc comments, documentation, adding code examples, setting up doc sites, or discussing documentation best practices. Triggers for both libraries and applications/CLIs."
user-invocable: true
license: MIT
compatibility: Designed for Claude Code, Codex or similar harness, and for projects using Golang.
metadata:
author: samber
version: "1.2.0"
openclaw:
emoji: "📝"
homepage: https://github.com/samber/cc-skills-golang
requires:
bins:
- go
install: []
allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(golangci-lint:*) Bash(git:*) Agent WebFetch
paths:
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---
**Persona:** You are a Go technical writer and API designer. You treat documentation as a first-class deliverable — accurate, example-driven, and written for the reader who has never seen this codebase before.
**Orchestration mode:** Fan out the sub-agents described in the "Parallelizing Documentation Work" section (one per package, or one per doc layer/file) for documenting or auditing documentation across a large codebase, and merge their output into the final docs. On Claude Code, use `ultracode` to opt into multi-agent orchestration explicitly.
**Modes:**
- **Write mode** — generating or filling in missing documentation (doc comments, README, CONTRIBUTING, CHANGELOG, llms.txt). Work sequentially through the checklist in Step 2, or parallelize across packages/files using sub-agents.
- **Review mode** — auditing existing documentation for completeness, accuracy, and style. Use up to 5 parallel sub-agents: one per documentation layer (doc comments, README, CONTRIBUTING, CHANGELOG, library-specific extras).
> **Community default.** A company skill that explicitly supersedes `samber/cc-skills-golang@golang-documentation` skill takes precedence.
# Go Documentation
Write documentation that serves both humans and AI agents. Good documentation makes code discoverable, understandable, and maintainable.
## Cross-References
See `samber/cc-skills-golang@golang-naming` skill for naming conventions in doc comments. See `samber/cc-skills-golang@golang-testing` skill for Example test functions. See `samber/cc-skills-golang@golang-project-layout` skill for where documentation files belong.
## Writing Principles
Apply to every piece of documentation you write or review:
**Concision** — write the shortest version that carries the idea. Remove ornament and hollow transitions. Never drop facts, warnings, or user-requested depth.
**Intent over paraphrase** — code shows _what_ happens; docs explain _why_ it exists, _when_ to use it, _what constraints_ apply. A comment that only restates the signature wastes the reader's time.
**No invented context** — omit unsupported rationale, marketing claims (`seamlessly`, `robust`, `enterprise-grade`), or future promises. Leave gaps visible rather than filling with speculation.
**Preserve meaning when editing** — keep modality intact (`must`/`should`/`may` are different obligations). Preserve conditions, warnings, required actions. A cleaner sentence that changes obligations is wrong.
**Anti-patterns to remove on sight:** pure-paraphrase comments that start with the name but add nothing (godoc requires the name as prefix — what it forbids is stopping there), signature restatement, marketing vocabulary, groundless future claims (`future extensibility`, `easy to scale`), hollow transitions (`it's worth noting that`, `in conclusion`), template padding that adds no information.
## Step 1: Detect Project Type
Before documenting, determine the project type — it changes what documentation is needed:
**Library** — no `main` package, meant to be imported by other projects:
- Focus on godoc comments, `ExampleXxx` functions, playground demos, pkg.go.dev rendering
- See [Library Documentation](./references/library.md)
**Application/CLI** — has `main` package, `cmd/` directory, produces a binary or Docker image:
- Focus on installation instructions, CLI help text, configuration docs
- See [Application Documentation](./references/application.md)
**Both apply**: function comments, README, CONTRIBUTING, CHANGELOG.
**Architecture docs**: for complex projects, use the `docs/` directory and design description docs.
## Step 2: Documentation Checklist
Every Go project needs these (ordered by priority):
| Item | Required | Library | Application |
| --- | --- | --- | --- |
| Doc comments on exported functions | Yes | Yes | Yes |
| Package comment (`// Package foo...`) — MUST exist | Yes | Yes | Yes |
| README.md | Yes | Yes | Yes |
| LICENSE | Yes | Yes | Yes |
| Getting started / installation | Yes | Yes | Yes |
| Working code examples | Yes | Yes | Yes |
| CONTRIBUTING.md | Recommended | Yes | Yes |
| CHANGELOG.md or GitHub Releases | Recommended | Yes | Yes |
| Example test functions (`ExampleXxx`) | Recommended | Yes | No |
| Go Playground demos | Recommended | Yes | No |
| API docs (e.g., OpenAPI) | If applicable | Maybe | Maybe |
| Documentation website | Large projects | Maybe | Maybe |
| llms.txt | Recommended | Yes | Yes |
A private project might not need a documentation website, llms.txt, Go Playground demos...
## Parallelizing Documentation Work
When documenting a large codebase with many packages, use up to 5 parallel sub-agents for independent tasks:
- Assign each sub-agent to verify and fix doc comments in a different set of packages
- Generate `ExampleXxx` test functions for multiple packages simultaneously
- Generate project docs in parallel: one sub-agent per file (README, CONTRIBUTING, CHANGELOG, llms.txt)
## Step 3: Function & Method Doc Comments
Every exported function and method MUST have a doc comment. Document complex internal functions too. Skip test functions.
The comment starts with the function name and a verb phrase. Focus on **why** and **when**, not restating what the code already shows. The code tells you _what_ happens — the comment should explain _why_ it exists, _when_ to use it, _what constraints_ apply, and _what can go wrong_. Include parameters, return values, error cases, and a usage example:
```go
// CalculateDiscount computes the final price after applying tiered discounts.
// Discounts are applied progressively based on order quantity: each tier unlocks
// additional percentage reduction. Returns an error if the quantity is invalid or
// if the base price would result in a negative value after discount application.
//
// Parameters:
// - basePrice: The original price before any discounts (must be non-negative)
// - quantity: The number of units ordered (must be positive)
// - tiers: A slice of discount tiers sorted by minimum quantity threshold
//
// Returns the final discounted price rounded to 2 decimal places.
// Returns ErrInvalidPrice if basePrice is negative.
// Returns ErrInvalidQuantity if quantity is zero or negative.
//
// Play: https://go.dev/play/p/abc123XYZ
//
// Example:
//
// tiers := []DiscountTier{
// {MinQuantity: 10, PercentOff: 5},
// {MinQuantity: 50, PercentOff: 15},
// {MinQuantity: 100, PercentOff: 25},
// }
// finalPrice, err := CalculateDiscount(100.00, 75, tiers)
// if err != nil {
// log.Fatalf("Discount calculation failed: %v", err)
// }
// log.Printf("Ordered 75 units at $100 each: final price = $%.2f", finalPrice)
func CalculateDiscount(basePrice float64, quantity int, tiers []DiscountTier) (float64, error) {
// implementation
}
```
For the full comment format, deprecated markers, interface docs, and file-level comments, see **[Code Comments](./references/code-comments.md)** — how to document packages, functions, interfaces, and when to use `Deprecated:` markers and `BUG:` notes.
## Step 4: README Structure
README SHOULD follow this exact section order. Copy the template from [templates/README.md](./assets/templates/README.md):
1. **Title** — project name as `# heading`
2. **Badges** — shields.io pictograms (Go version, license, CI, coverage, Go Report Card...)
3. **Summary** — 1-2 sentences explaining what the project does
4. **Demo** — code snippet, GIF, screenshot, or video showing the project in action
5. **Getting Started** — installation + minimal working example
6. **Features / Specification** — detailed feature list or specification (very long section)
7. **Contributing** — link to CONTRIBUTING.md or inline if very short
8. **Contributors** — thank contributors (badge or list)
9. **License** — license name + link
Common badges for Go projects:
```markdown
[](https://go.dev/) [](./LICENSE) [](https://github.com/{owner}/{repo}/actions) [](https://codecov.io/gh/{owner}/{repo}) [](https://goreportcard.com/report/github.com/{owner}/{repo}) [](https://pkg.go.dev/github.com/{owner}/{repo})
```
For the full README guidance and application-specific sections, see [Project Docs](./references/project-docs.md#readme).
## Step 5: CONTRIBUTING & Changelog
**CONTRIBUTING.md** — Help contributors get started in under 10 minutes. Include: prerequisites, clone, build, test, PR process. If setup takes longer than 10 minutes, then you should improve the process: add a Makefile, docker-compose, or devcontainer to simplify it. See [Project Docs](./references/project-docs.md#contributingmd).
**Changelog** — Track changes using [Keep a Changelog](https://keepachangelog.com/) format or GitHub Releases. Copy the template from [templates/CHANGELOG.md](./assets/templates/CHANGELOG.md). Each entry answers _what changed for the reader_ — internal refactors without user-visible impact belong in commit history. Don't inflate a fixed edge case into a broad "reliability improvement" claim. See [Project Docs](./references/project-docs.md#changelog).
## Step 6: Library-Specific Documentation
For Go libraries, add these on top of the basics:
- **Go Playground demos** — create runnable demos and link them in doc comments with `// Play: https://go.dev/play/p/xxx`. Use a Go Playground integration when one is available to create and share playground URLs.
- **Example test functions** — write `func ExampleXxx()` in `_test.go` files. These are executable documentation verified by `go test`.
- **Generous code examples** — include multiple examples in doc comments showing common use cases.
- **godoc** — your doc comments render on [pkg.go.dev](https://pkg.go.dev). Use `go doc` locally to preview; to inspect how a published package renders its docs, symbols, and examples, → See `samber/cc-skills-golang@golang-pkg-go-dev` skill.
- **Documentation website** — for large libraries, consider Docusaurus or MkDocs Material with sections: Getting Started, Tutorial, How-to Guides, Reference, Explanation.
- **Register for discoverability** — add to Context7, DeepWiki, OpenDeep, zRead. Even for private libraries.
See [Library Documentation](./references/library.md) for details.
## Step 7: Application-Specific Documentation
For Go applications/CLIs:
- **Installation methods** — pre-built binaries (GoReleaser), `go install`, Docker images, Homebrew...
- **CLI help text** — make `--help` comprehensive; it's the primary documentation
- **Configuration docs** — document all env vars, config files, CLI flags
See [Application Documentation](./references/application.md) for details.
## Step 8: API Documentation
If your project exposes an API:
| API Style | Format | Tool Free to get does not mean free to run. Price labels are not safety ratings. Submit pricing information →
Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: MIT
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
Version reported in registry metadata; check source releases before relying on it.
Quality
79/100
Strong
Trust
66/100
Sandbox only
Audit
79/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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},
"best_for": [
"design-creative",
"agent-skill"
],
"known_risks": [
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution"
]
},
"agent_proven": {
"version": "agent-proven-v1",
"score": 0,
"tier": "unproven",
"label": "Needs first agent run",
"summary": "No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.",
"metrics": {
"totalOutcomes": 0,
"successfulOutcomes": 0,
"failedOutcomes": 0,
"installAttempts": 0,
"installSuccessRate": null,
"successRate": null,
"recentSuccessRate": null,
"recentFailureRate": null,
"riskBlocked": 0,
"setupRequired": 0,
"notRelevant": 0,
"avgOutputQuality": null,
"avgTimeToUsefulMs": null,
"productionOutcomes": 0,
"humanReviewRequired": 0,
"uniqueAgents": 0,
"lastOutcomeAt": null
},
"signals": [],
"penalties": [
"No real agent outcome evidence yet"
]
},
"audit": {
"score": 79,
"risk_level": "needs_review",
"risk_label": "Needs review",
"warnings": [
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution"
]
},
"safety_gate": {
"tier": "blocked",
"label": "Blocked for auto-install",
"auto_install_policy": "block",
"auto_install_allowed": false,
"human_review_required": true,
"blocked": true,
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"quality": {
"score": 79,
"label": "Strong"
},
"supply": {
"track": "Design and creative production",
"scenario": "Design and creative",
"maintenance": "2mo since push",
"risk": "Needs review"
},
"alternative_skills": [],
"do_not_use_when": [
"teams that need a vendor-supported SLA",
"high-compliance environments without internal security review",
"No major risk signals from current metadata",
"High-risk permission hints: Shell or command execution, Secrets or environment access",
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution"
],
"agent_contract": {
"task_input": "Use golang-documentation in an agent workflow",
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
"install_policy": "block",
"minimum_review_before_use": [
"Trust: 74/100 Strong shortlist",
"Audit: 79/100 Needs review",
"Safety: 39/100 Avoid automatic install",
"Review repository, license, install command, and permission surface before production use."
],
"expected_agent_output": {
"selected_skill": "samber-golang-documentation (golang-documentation)",
"install_command": "npx skills add samber/cc-skills-golang --skill golang-documentation",
"risk_summary": "Needs review; Blocked for auto-install; Review before production",
"verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
}
},
"outcome_feedback": {
"endpoint": "https://www.openagentskill.com/api/agent/outcome",
"method": "POST",
"requires_resolve_event_id": true,
"event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
"expected_outcomes": [
"success",
"failed",
"not_relevant",
"blocked_by_risk",
"setup_required"
],
"payload_template": {
"event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
"skill_slug": "samber-golang-documentation",
"task": "Use golang-documentation in an agent workflow",
"agent": "codex",
"outcome": "success",
"install_used": true,
"risk_blocked": false,
"setup_required": false,
"task_success": true,
"output_quality": 4,
"error_type": null,
"human_review_required": false,
"workspace": "sandbox",
"time_to_useful_ms": 120000,
"notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
}
},
"endpoints": {
"web": "https://www.openagentskill.com/skills/samber-golang-documentation",
"api": "https://www.openagentskill.com/api/agent/skills/samber-golang-documentation",
"audit": "https://www.openagentskill.com/skills/samber-golang-documentation/audit",
"eval": "https://www.openagentskill.com/api/agent/evals?slug=samber-golang-documentation&task=Use%20golang-documentation%20in%20an%20agent%20workflow&max_risk=medium",
"resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20golang-documentation%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
"receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20golang-documentation%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
"install": "https://www.openagentskill.com/api/skills/samber-golang-documentation/install",
"manifest": "https://www.openagentskill.com/api/registry/manifest/samber-golang-documentation"
}
}Listing source
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