What is observability?

A set of guidance for monitoring and notifications with Prometheus, Alertmanager, Grafana, and Gatus. Prometheus records measurements, Alertmanager routes alerts, Grafana displays dashboards, and Gatus checks service endpoints.

Use it when adding or editing alerts, scrape targets, notification routes, dashboards, endpoint checks, or probes, and when deciding whether an alert is inactive.

It prevents rules and probes that look valid but never trigger, and clarifies which alert levels actually notify people. It also explains why a missing measurement may be normal rather than evidence of a broken rule.

How Aviator-Coding/home-ops configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to Aviator-Coding/home-ops. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Aviator-Coding/home-ops/main/.agents/skills/observability/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Aviator-Coding/home-ops

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/aviator-coding/home-ops/observability/github.svg)](https://agentmods.dev/skills/aviator-coding/home-ops/observability)

Your own site

<a href="https://agentmods.dev/skills/aviator-coding/home-ops/observability"><img src="https://agentmods.dev/badge/skills/aviator-coding/home-ops/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/aviator-coding/home-ops/observability"><img src="https://agentmods.dev/badge/skills/aviator-coding/home-ops/observability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,217 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	$0.00086	$0.01217
Opus 5.5	$0.00034	$0.00487
Sonnet 5.5	$0.00017	$0.00243
Haiku 4.5	$0.00009	$0.00122

Measured 23d ago against content hash 1ac7c6712460, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 23d 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.

.agents/skills/observability/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Observability: alerts, scrape targets, Alertmanager, Gatus, Grafana

Rules, probes and Gatus checks can look correct and never fire. severity: info does not page. Prove a check both ways before trusting it.

Tripwires

Syntax gates do not prove a rule can fire. flate, promtool and CI check expression syntax, not that the metric exists or the threshold is reachable. Evaluate against live Prometheus both ways: quiet now, and a series when the comparison is inverted. rule-traps.md
A missing series is not a dead rule. Sparse gauges and counters exist only while the condition is happening. Read the exporter HELP or source before calling a rule dead. rule-traps.md
severity: info does not page. critical is Pushover priority 2, warning is 0, info/notify is -2, and InfoInhibitor suppresses info when the namespace has no warning or critical. An alert with no severity label falls through to warning on purpose. A latched critical needs a recency bound. alertmanager.md
Chart-shipped rules are all-or-nothing. A vendor PrometheusRule cannot be patched per alert from Git. Document an inert rule at the HelmRelease.
commonMetadata.labels overwrites app.kubernetes.io/name on raw manifests at Flux reconcile. A ServiceMonitor selecting any other name matches zero targets, and kustomize build / flate cannot see it. port: on a PodMonitor is a container-port name, not targetPort. scrape-targets.md
Gatus is annotation-only plus hand-written endpoints. gatus.io/enabled ConfigMaps are not loaded. A check that hits an ext_authz HTTPRoute can stay green while the app is down. gatus.md
Grafana persistence is emptyDir. Admin password changes and hand-made tokens die on pod restart. The SA provisioner heals only the grafana-mcp Viewer token. grafana.md
A probe only helps if the path can return non-200. n8n /healthz is unconditional ok. Prefer the stock KubePodNotReady / KubePodCrashLooping / OOMKilled rules over a bespoke "app down" rule once real probes exist. gatus.md
Do not delete an orphan PrometheusRule or PodMonitor that outlived its Git declaration. database/tikv-rules, database/tikv-pd and database/tikv-tikv are that class. Deletion is a destructive action.

Read the full file on GitHub · 76 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

23d ago Changed 1ac7c6712460
25d ago First seen · 76 lines · 86 tokens per session scan A e33b49d3410c

Subscribe to this mod's changes

observability is a skill published in the GitHub repository Aviator-Coding/home-ops (3 stars, last pushed today), licensed MIT. It adds 86 tokens to every session and 1,217 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-29.

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home-ops: Skill for Claude Code