golang-samber-slog Skill for Claude: What It Does and How to Install It

Makes Claude build Go logging pipelines with samber's slog packages: sampling, formatting, routing and log sinks.

Installs: 39.1K; on skills.sh
Stars: 3.7K; on GitHub
Files: 5; besides SKILL.md
Updated: Nov 2026; last repo commit

This skill covers the samber/slog-* family of packages for Go's slog. Claude builds a pipeline in a fixed order: sample first, format second, route last.

It includes slog-multi for fan-out and routing, slog-sampling to cut volume, slog-formatter to clean attributes, HTTP middleware for five frameworks and backend sinks. It loads when your code imports any github.com/samber/slog-* package.

Good for

Go developers routing logs to Datadog, Sentry, Loki or Slack
Teams scrubbing personal data from logs before they leave the process
Anyone adding request logging to gin, echo, fiber or chi

Install golang-samber-slog

Claude Code

Copy this prompt.

Install the golang-samber-slog skill in Claude Code. Run this command:

npx skills add https://github.com/samber/cc-skills-golang --skill golang-samber-slog

Then check that it loaded and tell me how to use it.

2
Paste it into Claude Code. It shows the change and asks before running it.

Requires Node.js.

From its listing on skills.sh. Source.

What's in the skill

When it loads

Structured logging extensions for Golang using samber/slog-**** packages — multi-handler pipelines (slog-multi), log sampling (slog-sampling), attribute formatting (slog-formatter), HTTP middleware (slog-fiber, slog-gin, slog-chi, slog-echo), and backend routing (slog-datadog, slog-sentry, slog-loki, slog-syslog, slog-logstash, slog-graylog...). Apply when using or adopting slog, or when the codebase already imports any github.com/samber/slog-* package.

Sections in SKILL.md

The Pipeline Model
Core Libraries
slog-multi — Handler Composition
slog-sampling — Throughput Control
slog-formatter — Attribute Transformation
HTTP Middlewares
Backend Sinks
Common Mistakes
Performance Warnings
Best Practices
Cross-References

Key facts

Author: samber
License: MIT
Installs on skills.sh: 39,117 (Nov 2, 2026)
GitHub stars: 3,749 for the whole samber/cc-skills-golang repo (Nov 2, 2026)
Last repo commit: Nov 1, 2026
What it includes: 6 files including SKILL.md: 4 reference guides and an evals/evals.json file
Needs: A Go project and the go command (SKILL.md lists go as a required binary)
Skill version: 1.1.2
Starts: Loads on its own when your Go code uses the library (its description says so). Also a slash command, since it is marked user-invocable
Works in: Claude Code, Codex or similar tools per the SKILL.md compatibility line. The README also names Gemini, Copilot, Antigravity and Cursor

What it includes

Sample first, format second, route last
Records flow through sampling, then formatting, then routing, so dropped records cost no formatting work.
Try: “Add a slog pipeline that samples noise, scrubs PII and sends errors to Sentry.”
Write · Pipeline model
Fanout, Router, FirstMatch, Failover, Pool, Pipe
Six ways to combine handlers. Fanout runs handlers one after another, so its latency is the sum of all of them.
Write · slog-multi
Uniform, Threshold, Absolute and Custom strategies
Sampling must be the outermost handler. Threshold keeps the first N records per interval.
Write · slog-sampling
PII, error, time and HTTP attribute formatters
Applied as Pipe middleware so every handler gets clean attributes. Also generic formatters by type, key or group.
Write · slog-formatter
slog-gin, echo, fiber, chi and net/http
One pattern across frameworks with a shared Config for levels, request and response bodies and trace IDs.
Write · HTTP middlewares
Datadog, Sentry, Loki, Kafka, Slack and more
Batch handlers such as Datadog, Loki, Kafka and Parquet buffer records, so you must flush on shutdown or logs are lost.
Write · Backend sinks
Checklist of ordering and latency pitfalls
Covers sampling after formatting, a router with no catch-all, and benchmarking the pipeline with go test -bench.
Read · Common mistakes and performance

From the official docs

Permissions

Low risk

What it can do

Read your data
Create and change things
Delete things
Read-only mode

Watch out for

It lists git and shell commands as allowed tools
The allowed-tools line covers any go, golangci-lint and git command (git:*), not just read ones. Keep Claude Code's permission prompts on for git commands that change history. github.com
It may fetch web pages or query Context7
It lists WebFetch and the Context7 tools as allowed. Library names and questions can leave your machine. Do not put secrets in prompts about this code. github.com
Sink examples use webhook URLs and bot tokens
references/backend-handlers.md shows Slack and Telegram handlers configured with a webhook URL or token. Load real values from your secrets store, not from code Claude writes. github.com

Security advisories

No published security advisories as of Nov 2, 2026.

Technical details

Turning on read-only	No read-only mode in SKILL.md. Use version control.
Talks to	WebFetch is listed as an allowed tool. Library lookups go to Context7 if the Context7 MCP server is installed (the skill uses it as a fallback). Log sinks you configure (Datadog, Sentry, Loki and others) receive your logs; the skill helps wire them
Sign-in and keys	SKILL.md does not mention any account or key. The example code in references/backend-handlers.md configures a Slack webhook URL, a Slack bot token and a Telegram token in Go code; keep real values out of source control.
Scopes	Reads and edits files in your Go project SKILL.md lists these as allowed tools: go, golangci-lint, git, godig and gopls commands

Questions

What does the golang-samber-slog skill do?

It teaches Claude to build structured logging pipelines on Go's slog with the samber/slog-* packages. That includes sampling, attribute formatting, routing and sending logs to backends.

How do I install golang-samber-slog?

Use the install box at the top of this page. It is a text skill with reference guides, so there is nothing to compile. Start a new session so it loads, then work in a Go project.

golang-samber-slog vs golang-observability?

This skill is about samber's slog packages. SKILL.md points to the golang-observability skill for slog fundamentals such as levels, context, handler setup and migration.

Why did my logs go missing on shutdown?

Batch handlers such as slog-datadog, slog-loki, slog-kafka and slog-parquet buffer records. The skill says to flush them on shutdown, for example with handler.Stop(ctx) for Datadog.

Does it need other skills from the same repo?

SKILL.md does not list any other skill as required. SKILL.md points to related skills in samber/cc-skills-golang for side topics, and the README says installing only a subset gives a partial and possibly inconsistent view of the guidelines. For best results it recommends installing the general-purpose Go skills together.

Is golang-samber-slog safe?

Mostly, for your own Go projects. It is instructions plus reference files, and it lets Claude edit files and run go and git commands. Review diffs, keep the project under version control and avoid secrets in prompts.

Does golang-samber-slog work in Codex, Cursor or the Claude app?

It is designed for Claude Code, Codex or a similar tool, and the README says the skills are built for Claude Code, Codex, Gemini, Copilot, Antigravity and Cursor. Because it works on your Go files and uses the go command, use a coding tool rather than the Claude app.

Information

updated Nov 2, 2026

Repository: samber/cc-skills-golang
Folder: skills/golang-samber-slog

samber/cc-skills-golang skills.sh

Sources

Docs, issue trackers and discussions this page is built from.

Show all 3

golang-samber-slog SKILL.md · github.com
cc-skills-golang README · github.com
golang-samber-slog backend-handlers.md · github.com