observability-setup

observability-setup is a skill for Claude Code, Codex from sawrus/agent-guides. It costs 0 tokens per session (355 once invoked), scanned A, original, MIT.

A guide to monitoring running services with response-time, traffic, error, and resource measurements, plus logs and alerts. It uses Prometheus, a tool that collects service metrics.

In plain words
What is it for?
Setting up monitoring for a new service, writing Prometheus alert rules, defining structured logs, and debugging production issues.
Why use it?
It gives teams a consistent way to notice failures and performance problems and investigate what happened in production.

Skill for Claude CodeCodex

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

Good fit Setting up monitoring for a new service, writing Prometheus alert rules, defining structured logs, and debugging production issues.

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Install with agentmods
npx agentmods add skills/sawrus/agent-guides/observability-setup
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 sawrus/agent-guides --skill observability-setup
Clone the repo
git clone --depth 1 https://github.com/sawrus/agent-guides

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 observability-setup

README.md
[![agentmods](https://agentmods.dev/badge/skills/sawrus/agent-guides/observability-setup/github.svg)](https://agentmods.dev/skills/sawrus/agent-guides/observability-setup)
Your own site
<a href="https://agentmods.dev/skills/sawrus/agent-guides/observability-setup"><img src="https://agentmods.dev/badge/skills/sawrus/agent-guides/observability-setup/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 observability-setup

Your own site · 80×15
<a href="https://agentmods.dev/skills/sawrus/agent-guides/observability-setup"><img src="https://agentmods.dev/badge/skills/sawrus/agent-guides/observability-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 355 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 $0.00000 $0.00355
Opus 5 $0.00000 $0.00178
Sonnet 5 $0.00000 $0.00071
Haiku 4.5 $0.00000 $0.00036

Measured 6d ago against content hash 2d51f934fbff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

observability-setup 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 6d 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.

areas/software/platform/skills/observability-setup/SKILL.md · 50 lines

What it actually says

Skill: Observability Setup

When to load

When setting up monitoring for a new service, configuring alerts, debugging production issues.

Golden Signals (Mandatory)

Every service must expose:

  1. Latency: p50, p95, p99 response times
  2. Traffic: requests per second
  3. Errors: 4xx/5xx rate
  4. Saturation: CPU %, memory %, queue depth

Prometheus Alert Rules

groups:
  - name: api-alerts
    rules:
      - alert: HighErrorRate
        expr: |
          sum(rate(http_requests_total{status=~"5.."}[5m]))
          / sum(rate(http_requests_total[5m])) > 0.01
        for: 2m
        labels: { severity: critical }
        annotations:
          summary: "Error rate > 1% for 2 minutes"
          runbook: "https://runbooks.internal/high-error-rate"

      - alert: HighLatency
        expr: histogram_quantile(0.99, rate(http_request_duration_seconds_bucket[5m])) > 2
        for: 5m
        labels: { severity: warning }

Structured Logging Contract

{
  "timestamp": "2026-02-16T10:30:00Z",
  "level": "ERROR",
  "service": "payments-api",
  "trace_id": "abc123",
  "message": "Payment processing failed",
  "error": { "type": "PaymentGatewayError", "code": "CARD_DECLINED" },
  "duration_ms": 1240
}
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. 6d ago First seen · 50 lines · 0 tokens per session scan A 2d51f934fbff

Subscribe to this mod's changes

observability-setup is a skill published in the GitHub repository sawrus/agent-guides (17 stars, last pushed 10d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 355 tokens. 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 2026-09-03.