Installation
npx skills add oakoss/agent-skills --skill pino-logging 56
Installs
Pino Logging
High-performance JSON logger for Node.js. Transports run in worker threads to keep the main event loop free. Produces NDJSON by default with automatic level, time, pid, hostname, and msg fields.
When to use: Structured logging in Node.js applications, request-scoped logging with correlation IDs, sensitive data redaction, multi-destination log routing, framework logging integration.
When NOT to use: Browser-only logging (pino has limited browser support), simple console.log debugging during development, projects that need human-readable logs by default (pino outputs JSON; use pino-pretty for dev).
Package: pino (v10+)
Quick Reference
| Pattern | API | Key Points |
|---|---|---|
| Basic logger | pino() |
Defaults: level info, JSON to stdout |
| Set level | pino({ level: 'debug' }) |
fatal > error > warn > info > debug > trace |
| Log with context | logger.info({ userId }, 'msg') |
First arg is merged object, second is message |
| Error logging | logger.error({ err }, 'failed') |
Pass errors as err key for serialization |
| Child logger | logger.child({ requestId }) |
Bindings persist on all child logs |
| Redaction | pino({ redact: ['password'] }) |
Paths use dot notation, supports wildcards |
| Transport (worker) | pino({ transport: { target } }) |
Runs in worker thread, non-blocking |
| Multiple transports | transport: { targets: [...] } |
Different levels per destination |
| Pretty print (dev) | target: 'pino-pretty' |
Dev only — not for production |
| File transport | target: 'pino/file' |
Built-in, with mkdir option |
| Rotating files | target: 'pino-roll' |
Size and time-based rotation |
| HTTP middleware | pinoHttp() from pino-http |
Auto request/response logging |
| Request ID | genReqId option in pino-http |
Generate or forward X-Request-Id |
| Serializers | serializers: { req, res, err } |
Transform objects before logging |
| Formatters | formatters: { level, log } |
Rename fields, transform output |
| Custom levels | customLevels: { http: 35 } |
Add levels between built-in ones |
| Async destination | pino.destination({ sync: false }) |
Buffered async writes |
| Fastify | fastify({ logger: true }) |
Built-in pino, request.log |
| Hono | hono-pino middleware |
c.get('logger') in handlers |
Common Mistakes
| Mistake | Fix |
|---|---|
Using pino-pretty in production |
Use JSON output in production; pretty-print only in dev via transport |
| Logging sensitive data (tokens, passwords) | Use redact option with paths to sensitive fields |
| Creating a new logger per request | Use logger.child({ requestId }) for request-scoped context |
| Blocking main thread with file writes | Use pino.transport() — runs in a worker thread |
Using JSON.stringify on errors |
Pass errors as { err } — pino serializes stack, cause chain |
Not forwarding X-Request-Id header |
Use genReqId in pino-http to check headers first |
| Logging inside hot loops | Check logger.isLevelEnabled('debug') before expensive operations |
Missing fetch-depth: 0 with transports |
Transports are separate packages — install them as dependencies |
Delegation
If the
honoskill is available, delegate Hono middleware and routing patterns to it.
If thevitest-testingskill is available, delegate test setup and mocking patterns to it.
If thesentry-setup-loggingskill is available, delegate Sentry integration to it — it coversSentry.pinoIntegration()for forwarding pino logs to Sentry.
Otherwise, recommend:pnpm dlx skills add getsentry/sentry-for-claude -s sentry-setup-logging -a claude-code -y
References
Installs
Security Audit
View Source
oakoss/agent-skills
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How to use this skill
Install pino-logging by running npx skills add oakoss/agent-skills --skill pino-logging in your project directory. Run the install command above in your project directory. The skill file will be downloaded from GitHub and placed in your project.
No configuration needed. Your AI agent (Claude Code, Cursor, Windsurf, etc.) automatically detects installed skills and uses them as context when generating code.
The skill enhances your agent's understanding of pino-logging, helping it follow established patterns, avoid common mistakes, and produce production-ready output.
What you get
Skills are plain-text instruction files — not executable code. They encode expert knowledge about frameworks, languages, or tools that your AI agent reads to improve its output. This means zero runtime overhead, no dependency conflicts, and full transparency: you can read and review every instruction before installing.
Compatibility
This skill works with any AI coding agent that supports the skills.sh format, including Claude Code (Anthropic), Cursor, Windsurf, Cline, Aider, and other tools that read project-level context files. Skills are framework-agnostic at the transport level — the content inside determines which language or framework it applies to.
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