A guide to Prometheus, a monitoring system that collects numeric measurements from applications and infrastructure over time.

Use it to collect request counts, memory usage, and other metrics, query them with PromQL, and route alerts through Alertmanager.

It makes it easier to see service health, query performance data, and trigger alerts when systems behave unexpectedly.

prometheus — Skill for Claude Code and Codex by G1Joshi

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 G1Joshi/Agent-Skills --skill prometheus

Clone the repo

git clone --depth 1 https://github.com/G1Joshi/Agent-Skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/g1joshi/agent-skills/prometheus/github.svg)](https://agentmods.dev/skills/g1joshi/agent-skills/prometheus)

Your own site

<a href="https://agentmods.dev/skills/g1joshi/agent-skills/prometheus"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/prometheus/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/g1joshi/agent-skills/prometheus"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/prometheus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 371 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00018	$0.00371
Opus 5	$0.00009	$0.00186
Sonnet 5	$0.00004	$0.00074
Haiku 4.5	$0.00002	$0.00037

Measured 9d ago against content hash 376e8cd3d44b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

prometheus 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.

skills/devops/prometheus/SKILL.md · 60 lines

What it actually says

Prometheus

Prometheus is the cloud-native standard for metric collection. Prometheus 3.0 (2025) features a modern UI, Native Histograms, and direct OpenTelemetry (OTLP) ingestion.

When to Use

Kubernetes: Standard monitoring stack (Prometheus Operator).
White-box Monitoring: Measuring internal state (heap usage, request count) via endpoints.
Alerting: Alertmanager handles de-duplication and routing to Slack/PagerDuty.

Quick Start

# prometheus.yml
global:
  scrape_interval: 15s

scrape_configs:
  - job_name: "node"
    static_configs:
      - targets: ["localhost:9100"]

Core Concepts

Time Series Format

Metrics are identified by name and label pairs. http_requests_total{method="POST", handler="/api"}

PromQL

Powerful query language. rate(http_requests_total[5m])

Pull Model

Prometheus scrapes targets. Apps do not push to Prometheus (usually).

Best Practices (2025)

Do:

Use High-Cardinality wisely: Native Histograms in v3.0 help, but keep labels bounded.
Use Service Monitors: In K8s, use the Operator's ServiceMonitor CRD instead of manual config.
Use OTLP: Ingest OTel metrics directly if you are transitioning standards.

Don't:

Don't use for logs: It is for metrics only. Use Loki for logs.

References

Prometheus Documentation

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.

9d ago First seen · 60 lines · 18 tokens per session scan A 376e8cd3d44b

Subscribe to this mod's changes

prometheus is a skill published in the GitHub repository G1Joshi/Agent-Skills (12 stars, last pushed 7mo ago), licensed MIT. It adds 18 tokens to every session and 371 once invoked, about $0.0001 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 2026-09-03.

Analytics and metrics Cloud DevOps and cloud agent-skills antigravity chatgpt claude cursor gemini

shipping-and-launch

Prepares production launches. Use when preparing to deploy to production, or when asking what needs to be in place before shipping. Use when you need a pre-launch checklist, when setting up monitoring, when planning a staged rollout, or when you need a rollback strategy.

addyosmani/agent-skills · 57 tokens

prometheus