observability

A guide for making production code easier to diagnose using traces, measurements, and structured logs. Production code is software running for real users or workloads.

In plain words
What is it for?
Use it when writing or reviewing request handlers, remote procedure calls (RPCs), background jobs, or code that adds tracing, metrics, or structured logging.
Why use it?
It helps developers understand failures, slow requests, and background-job problems after deployment.

Skill for Claude CodeCodex

Part of the 97 plugin — 12 skills, 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/oribarilan/97/observability
Any agent
npx skills add oribarilan/97 --skill observability
Clone the repo
git clone --depth 1 https://github.com/oribarilan/97

Made for: Claude Code, Codex.

Or install 97, the plugin that ships this one along with the rest of its 12 skills, 1 hook.

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,998 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown 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 $0.00036 $0.01998
Opus 5 $0.00018 $0.00999
Sonnet 5 $0.00007 $0.00400
Haiku 4.5 $0.00004 $0.00200

Measured 3d ago against content hash 9a5e117c1993, 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.

4. **Propagate W3C Trace Context across process boundaries.** Every outgoing HTTP / gRPC / queue call carries the trace headers; every incoming handler reads them and continues the trace. The platform's tracer SDK does t
skills/observability/SKILL.md · 92 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file 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.

  1. 3d ago First seen · 92 lines · 36 tokens per session scan A 9a5e117c1993

Subscribe to this mod's changes

observability is a skill published in the GitHub repository oribarilan/97 (24 stars, last pushed 3mo ago), with no licence file. It adds 36 tokens to every session and 1,998 once invoked, about $0.0002 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 2026-08-30.

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