structured-logging-and-observability

structured-logging-and-observability is a skill for Claude Code, Codex from aiming-lab/MetaClaw. It costs 46 tokens per session (222 once invoked), scanned A, original, MIT.

A set of practices for recording and monitoring running software through structured logs, measurements, and health checks.

In plain words
What is it for?
Use it when building production services, data pipelines, or automation that needs debugging, monitoring, or audit records.
Why use it?
It makes failures and slowdowns easier to diagnose, and lets monitoring systems detect whether a service is working.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when building production services, data pipelines, or automation that needs debugging, monitoring, or audit records.

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Install with agentmods
npx agentmods add skills/aiming-lab/metaclaw/structured-logging-and-observability
About the project

MetaClaw is an AI-agent system that learns from conversations and evolves its behavior over time. It provides memory and learning modes for users who want an agent that adapts across interactions, with support for multiple claw-based agent projects.

aiming-lab/MetaClaw · 3,495 stars · on GitHub · arxiv.org

Install

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.

Any agent
npx skills add aiming-lab/MetaClaw --skill structured-logging-and-observability
Clone the repo
git clone --depth 1 https://github.com/aiming-lab/MetaClaw

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for structured-logging-and-observability

README.md
[![agentmods](https://agentmods.dev/badge/skills/aiming-lab/metaclaw/structured-logging-and-observability/github.svg)](https://agentmods.dev/skills/aiming-lab/metaclaw/structured-logging-and-observability)
Your own site
<a href="https://agentmods.dev/skills/aiming-lab/metaclaw/structured-logging-and-observability"><img src="https://agentmods.dev/badge/skills/aiming-lab/metaclaw/structured-logging-and-observability/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.

agentmods 80×15 button for structured-logging-and-observability

Your own site · 80×15
<a href="https://agentmods.dev/skills/aiming-lab/metaclaw/structured-logging-and-observability"><img src="https://agentmods.dev/badge/skills/aiming-lab/metaclaw/structured-logging-and-observability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 222 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.00222
Opus 5 $0.00023 $0.00111
Sonnet 5 $0.00009 $0.00044
Haiku 4.5 $0.00005 $0.00022

Measured 9d ago against content hash e54b67465a4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

structured-logging-and-observability 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 9d 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.

memory_data/skills/structured-logging-and-observability/SKILL.md · 27 lines

What it actually says

Structured Logging and Observability

Log levels:

  • DEBUG: detailed diagnostic (off in production)
  • INFO: normal operation milestones
  • WARNING: recoverable unexpected state
  • ERROR: operation failed, action needed

Structured logs (JSON) over free-form text:

import structlog
log = structlog.get_logger()
log.info("request_complete", method="POST", path="/api/data", status=200, latency_ms=42)

Metrics to expose: request rate, error rate, latency (p50/p95/p99), queue depth.

Health check endpoint: /health returning {"status": "ok"} — required for load balancers.

Anti-pattern: Logging only on error; you can't diagnose what you didn't observe.

Changes

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.

  1. 9d ago First seen · 27 lines · 46 tokens per session scan A e54b67465a4a

Subscribe to this mod's changes

structured-logging-and-observability is a skill published in the GitHub repository aiming-lab/MetaClaw (3,495 stars, last pushed 3mo ago), licensed MIT. It adds 46 tokens to every session and 222 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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