observability

observability is a skill for Claude Code, Codex from zircote-plugins/sdlc-quality. It costs 66 tokens per session (1,810 once invoked), scanned A, original, MIT.

A set of rules and guidance for observability: collecting logs, measurements, traces, and health checks to understand how software is running. Distributed tracing follows a request across multiple services.

In plain words
What is it for?
Use it when setting up logging, metrics, tracing, monitoring, health checks, OpenTelemetry, or service-level objectives.
Why use it?
It helps teams decide what information to record and how to structure it, making failures and performance problems easier to investigate.

Skill for Claude CodeCodex

Part of the sdlc plugin — 10 skills, 5 commands, 4 agents, 1 hook shipped together

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.

agentmods
npx agentmods add skills/zircote-plugins/sdlc-quality/observability
Any agent
npx skills add zircote-plugins/sdlc-quality --skill observability
Clone the repo
git clone --depth 1 https://github.com/zircote-plugins/sdlc-quality

Made for: Claude Code, Codex.

Or install sdlc, the plugin that ships this one along with the rest of its 10 skills, 5 commands, 4 agents, 1 hook.

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

README.md
[![agentmods](https://agentmods.dev/badge/skills/zircote-plugins/sdlc-quality/observability.svg)](https://agentmods.dev/skills/zircote-plugins/sdlc-quality/observability)
Your own site
<a href="https://agentmods.dev/skills/zircote-plugins/sdlc-quality/observability"><img src="https://agentmods.dev/badge/skills/zircote-plugins/sdlc-quality/observability.svg" alt="Measured on agentmods" height="20"></a>
Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,810 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00066 $0.01810
Opus 5 $0.00033 $0.00905
Sonnet 5 $0.00013 $0.00362
Haiku 4.5 $0.00007 $0.00181

Measured 3d ago against content hash 0449aa8311f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

observability scanned grade A with 1 finding 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 3d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s http://localhost:8080/health | jq .
.github/skills/observability/SKILL.md · 307 lines

How it starts

The opening of the file, as written. The whole thing — 307 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Observability Standards

Guidance for implementing observability requirements including logging, metrics, tracing, and monitoring configuration.

Tooling

Available Tools: If using Claude Code, the agents:sre-engineer agent specializes in observability setup and SLO management. The agents:devops-engineer agent can help configure monitoring infrastructure.

Logging Requirements

Structured Logging (MUST)

All logging MUST use structured format (JSON preferred):

{
  "timestamp": "2024-01-15T10:30:00.000Z",
  "level": "info",
  "message": "Request processed",
  "service": "api-gateway",
  "trace_id": "abc123",
  "span_id": "def456",
  "duration_ms": 45,
  "status_code": 200
}

Log Levels (MUST)

Use consistent log levels with defined semantics:

Level Purpose When to Use
ERROR Errors requiring attention Failures, exceptions
WARN Potential issues Degraded performance, retries
INFO Significant events Request completion, state changes
DEBUG Detailed information Development, troubleshooting
TRACE Very detailed tracing Deep debugging

Required Log Fields (MUST)

All log entries MUST include:

Field Description
timestamp ISO 8601 format with timezone
level Log severity level
message Human-readable description
service Service/application name

Recommended Log Fields (SHOULD)

Log entries SHOULD include when applicable:

Field Description
trace_id Distributed trace identifier
span_id Span identifier
user_id User identifier (if authenticated)
request_id Request correlation ID
duration_ms Operation duration

Read the full file on GitHub · 307 lines

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. 3d ago First seen · 307 lines · 66 tokens per session scan A 0449aa8311f8

Subscribe to this mod's changes

observability is a skill published in the GitHub repository zircote-plugins/sdlc-quality (10 stars, last pushed 1mo ago), licensed MIT. It adds 66 tokens to every session and 1,810 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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