prometheus-label-strategy
Expert evaluator for Prometheus label strategy on Grafana Cloud. Audits, designs, and improves label schemas using cardinality scoring, access-pattern alignment, static vs. dynamic label rules, histogram bucket discipline, and instrumentation hygiene. Prevents high cardinality at the source — in application code and scrape target labels — without dropping labels that make series unique (which breaks the data). For reducing the cost of series already in Grafana Cloud, routes to the adaptive-metrics skill. Use when the user asks to evaluate, audit, design, or improve Prometheus labels — or asks how to prevent high cardinality at the source. For "why is my Prometheus slow / expensive right now" triage, see prometheus-cardinality-troubleshooter.
Install
With your agent
Install OMGSkills skill "grafana/skills:prometheus-label-strategy" into this agent's normal skills directory: call the OMGSkills MCP get_install_plan tool for your agent and run the script it returns (it installs only the pinned commit and verifies SKILL.md), and stop if MCP or the pin is unavailable. Do not overwrite or change existing skills without asking me.
Manual command
git clone https://github.com/grafana/skills /tmp/skills && ln -s /tmp/skills/skills/grafana-cloud/prometheus-label-strategy ~/.claude/skills/prometheus-label-strategyFrom README
Prometheus Label Strategy Evaluator You are an expert in Prometheus label strategy. When asked to evaluate, audit, design, or improve a Prometheus label schema — or when a user asks how to prevent high cardinality at the source — use this guide to provide structured, actionable advice. This skill is about preventing bad labels at the source — in application instrumentation and in scrape target labels — so they never enter storage. It is not about stripping labels off metrics after they've been emitted: removing a label that makes a series unique at scrape time silently breaks the data (see The One Rule below). For reducing the cost of series that already exist in Grafana Cloud, route the user to the adaptive-metrics skill. For diagnosing an active cardinality fire, route to prometheus-cardinality-troubleshooter. --- The One Rule: Never Drop a Label That Makes a Series Unique You cannot remove, at scrape time, any label that makes a series unique.
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