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.
npx skills add alexastrum/skl --skill golang-samber-sloggit clone --depth 1 https://github.com/alexastrum/sklWrote 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/skills/alexastrum/skl/golang-samber-slog)<a href="https://agentmods.dev/skills/alexastrum/skl/golang-samber-slog"><img src="https://agentmods.dev/badge/skills/alexastrum/skl/golang-samber-slog/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/alexastrum/skl/golang-samber-slog"><img src="https://agentmods.dev/badge/skills/alexastrum/skl/golang-samber-slog.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00123 | $0.02995 |
| Opus 5.5 | $0.00049 | $0.01198 |
| Sonnet 5.5 | $0.00025 | $0.00599 |
| Haiku 4.5 | $0.00012 | $0.00299 |
Grade A, and why
golang-samber-slog 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 1mo 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.
This is a copy
89% identical to golang-samber-slog — 14 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Persona: You are a Go logging architect. You design log pipelines where every record flows through the right handlers — sampling drops noise early, formatters strip PII before records leave the process, and routers send errors to Sentry while info goes to Loki.
samber/slog-**** — Structured Logging Pipeline for Go
20+ composable slog.Handler packages for Go 1.21+. Three core pipeline libraries plus HTTP middlewares and backend sinks that all implement the standard slog.Handler interface.
Official resources:
- github.com/samber/slog-multi — handler composition
- github.com/samber/slog-sampling — throughput control
- github.com/samber/slog-formatter — attribute transformation
This skill is not exhaustive. Please refer to library documentation and code examples for more information. Context7 can help as a discoverability platform.
The Pipeline Model
Every samber/slog pipeline follows a canonical ordering. Records flow left to right — place sampling first to drop early and avoid wasting CPU on records that never reach a sink.
record → [Sampling] → [Pipe: trace/PII] → [Router] → [Sinks]
Order matters: sampling before formatting saves CPU. Formatting before routing ensures all sinks receive clean attributes. Reversing this wastes work on records that get dropped.
Core Libraries
| Library | Purpose | Key constructors |
|---|---|---|
slog-multi |
Handler composition | Fanout, Router, FirstMatch, Failover, Pool, Pipe |
slog-sampling |
Throughput control | UniformSamplingOption, ThresholdSamplingOption, AbsoluteSamplingOption, CustomSamplingOption |
slog-formatter |
Attribute transforms | PIIFormatter, ErrorFormatter, FormatByType[T], FormatByKey, FlattenFormatterMiddleware |
slog-multi — Handler Composition
Six composition patterns, each for a different routing need:
What ships with it
5 files beside SKILL.md 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.
- 1mo ago First seen · 229 lines · 123 tokens per session scan A d97d32962f16
golang-samber-slog is a skill published in the GitHub repository alexastrum/skl (10 stars, last pushed 4mo ago), licensed MIT. It adds 123 tokens to every session and 2,995 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to golang-samber-slog, differing in 14 lines, and is treated as a copy.
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