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Agent skill

Golang Logging

by HoangNguyen0403 in HoangNguyen0403/agent-skills-standard

Standards for structured logging and observability in Golang.

MITAuto-check passedDevOps & Cloud

Install Golang Logging

skills CLI
$ npx skills add HoangNguyen0403/agent-skills-standard --skill golang-logging -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install HoangNguyen0403/agent-skills-standard golang-logging --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/golang/golang-logging .claude/skills/golang-logging && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
golang-logging
GitHub stars
572
Token cost
~629 tokens
SKILL.md length
266 words
Files
3 (incl. references)
Skills in repo
211
Repo updated
First seen
Licence
MIT

At a glance

Standards for structured logging and observability in Golang.

  • Works in 4 steps: Initialize structured logger at startup… → Inject request correlation IDs (TraceID,… → Pass logger via context… → …
  • Adding structured logging
  • SKILL.md covers Priority: P1 (HIGH), Principles, Libraries and Workflow: Set Up Structured…, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Golang Logging is an agent skill from HoangNguyen0403/agent-skills-standard. Standards for structured logging and observability in Golang. Use when adding structured logging or tracing to Go services.

Its SKILL.md is about 630 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `evals/evals.json` and `references/slog-patterns.md`).

It sits in DevOps & Cloud, covering Observability. It works with Go. The repository describes itself as: A collection of Agent Skills Standard and Best Practice for Programming Languages, Frameworks that help our AI Agent follow best practies on frameworks and programming laguages. The licence is MIT.

When your agent uses it

  • Adding structured logging
  • Tracing to Go services

Example prompts

  • “Use the golang-logging skill to standard for structured logging and observability in Golang”
  • “/golang-logging”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Initialize structured logger at startup in main() with standard JSON output.
  2. Inject request correlation IDs (TraceID, RequestID) via middleware using typed context keys.
  3. Pass logger via context (logger.FromContext(ctx)) or constructor injection.
  4. Log at the application boundary on error; wrap errors upstream without intermediate logging.

What it can do on your machine

Read from SKILL.md and the folder at commit b529c2d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Golang Logging loads about 629 tokens when it runs, and up to ~952 if it reads all its reference files. Until then it costs about 35 tokens; SKILL.md has 266 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~35
When it runs · the whole SKILL.md, loaded when a task matches
~629
With references · SKILL.md plus every file in references/, read only if the agent opens them
~952

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from HoangNguyen0403/agent-skills-standard at commit b529c2d, republished under its MIT licence (© HoangNguyen0403). 266 words, ~629 tokens.

Download SKILL.mdSave it as .claude/skills/golang-logging/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
golang-logging
description
Standards for structured logging and observability in Golang. Use when adding structured logging or tracing to Go services.

Golang Logging Standards

Priority: P1 (HIGH)

Principles

  • Structured Logging: Use JSON or structured key-value attributes. Machine-readable and filterable.
  • Strict Single-Log Boundary: Log errors once where they are handled or translated at the boundary (service or handler level). Never double-log in repository, utility, or deep helper functions—wrap and return errors instead.
  • Typed Context Keys: Always use private typed keys (type ctxKey string) for storing and retrieving request-scoped logger attributes.
  • Business Traceability vs PII Redaction: Include non-sensitive business identifiers (e.g. tenant ID, organization code, order number) for traceability. Strictly redact credentials, API tokens, passwords, and sensitive PII.
  • Leveled Logging: Debug, Info, Warn, Error.
  • No log.Fatal: Avoid terminating apps inside libraries. Return errors instead; only main() should handle process exit.

Libraries

  • log/slog (Recommended Stdlib): Stdlib since Go 1.21. Fast, structured, zero-dep.
  • Zap (uber-go/zap): Production-grade structured logger for high-throughput microservices.
  • Zerolog: Zero allocation, fast JSON logger.

Workflow: Set Up Structured Logging

  1. Initialize structured logger at startup in main() with standard JSON output.
  2. Inject request correlation IDs (TraceID, RequestID) via middleware using typed context keys.
  3. Pass logger via context (logger.FromContext(ctx)) or constructor injection.
  4. Log at the application boundary on error; wrap errors upstream without intermediate logging.

See slog setup and usage examples

Anti-Patterns

  • No Double-Logging: Do not log an error in the repository/database helper AND log it again in the service/handler.
  • No fmt.Println in production: Use structured, leveled loggers.
  • No Untyped Context Keys: Avoid context.WithValue(ctx, "logger", l) with raw string keys.
  • No Secrets in Logs: Redact bearer tokens, passwords, and sensitive personal info.
  • No log.Fatal in libraries: Return errors; only main() should call os.Exit.

References

© HoangNguyen0403, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/golang/golang-logging of HoangNguyen0403/agent-skills-standard.

  • SKILL.md
  • evals/evals.json
  • references/slog-patterns.md

Open the folder on GitHubat commit b529c2d

Compare with similar skills

Golang Logging next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Golang Logging compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Golang Logging this skillHoangNguyen0403/agent-skills-standard572—~629Automated safety check: PassMIT
Deploy Observabilityaliyun/alibabacloud-observability-mcp-server166—~2.6kAutomated safety check: NotesNone
Golang Samber Slogcontext-labs/whip1.1k2 repos~3kAutomated safety check: PassMIT
Golang Observabilitycontext-labs/whip1.1k1 repos~3.3kAutomated safety check: PassMIT
Golang Error Handlingunxed/f42433 repos~1.8kAutomated safety check: PassMIT
Vercel Optimize Auditvercel-labs/agent-skills32k8 repos~4.3kAutomated safety check: PassNone

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Works with

Categories

Questions about Golang Logging

What does Golang Logging do?

Standards for structured logging and observability in Golang. Golang Logging is an agent skill from HoangNguyen0403/agent-skills-standard. Standards for structured logging and observability in Golang.

When should I use Golang Logging?

Golang Logging fits situations like: adding structured logging; tracing to Go services.

How do I install Golang Logging in Claude Code?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill golang-logging -a claude-code`. Or copy the skill folder (skills/golang/golang-logging in HoangNguyen0403/agent-skills-standard) into .claude/skills/golang-logging in your project. Claude Code loads it when a task matches its description.

How do I install Golang Logging in Codex?

Run `npx skills add HoangNguyen0403/agent-skills-standard --skill golang-logging -a codex`. Or copy the skill folder (skills/golang/golang-logging in HoangNguyen0403/agent-skills-standard) into .agents/skills/golang-logging in your project. Codex loads it when a task matches its description.

Can I use Golang Logging in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HoangNguyen0403/agent-skills-standard --skill golang-logging -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/golang-logging, .gemini/skills/golang-logging, .github/skills/golang-logging and .opencode/skills/golang-logging in your project.

What does Golang Logging need to run?

SKILL.md names no scripts, command-line tools or credentials: Golang Logging is instructions for the agent only.

Does Golang Logging access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Golang Logging safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Golang Logging use?

Golang Logging is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Golang Logging use?

About 629 tokens (SKILL.md is roughly 2.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 323 tokens, read only when the agent opens those files.

What are the alternatives to Golang Logging?

Skills that share tags, products or a category with Golang Logging: Deploy Observability (aliyun/alibabacloud-observability-mcp-server, 166 stars), Golang Samber Slog (context-labs/whip, 1.1k stars), Golang Observability (context-labs/whip, 1.1k stars) and Golang Error Handling (unxed/f4, 243 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Golang Logging?

HoangNguyen0403 (a GitHub user) maintains it in HoangNguyen0403/agent-skills-standard, which has 572 GitHub stars. The repository holds 211 skills in this directory. The repository was last updated on October 9, 2026.

Source: HoangNguyen0403/agent-skills-standard on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.