observability

observability is a skill for Claude Code, Codex from zllovesuki/cloudflare-agent-skills. It costs 47 tokens per session (807 once invoked), scanned A, original, no licence file.

A guide for adding production observability to Cloudflare Workers applications. Observability means collecting information such as logs, request IDs, metrics, traces, and errors so software can be monitored and debugged.

In plain words
What is it for?
Adding structured logs, request tracking, metrics, traces, and visibility into Durable Objects, Queues, Workflows, and error handling.
Why use it?
It helps developers investigate incidents and understand running Cloudflare applications before deployment or during debugging.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Adding structured logs, request tracking, metrics, traces, and visibility into Durable Objects, Queues, Workflows, and error handling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/zllovesuki/cloudflare-agent-skills/observability
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 zllovesuki/cloudflare-agent-skills --skill observability
Clone the repo
git clone --depth 1 https://github.com/zllovesuki/cloudflare-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.

agentmods badge for observability

README.md
[![agentmods](https://agentmods.dev/badge/skills/zllovesuki/cloudflare-agent-skills/observability/github.svg)](https://agentmods.dev/skills/zllovesuki/cloudflare-agent-skills/observability)
Your own site
<a href="https://agentmods.dev/skills/zllovesuki/cloudflare-agent-skills/observability"><img src="https://agentmods.dev/badge/skills/zllovesuki/cloudflare-agent-skills/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.

agentmods 80×15 button for observability

Your own site · 80×15
<a href="https://agentmods.dev/skills/zllovesuki/cloudflare-agent-skills/observability"><img src="https://agentmods.dev/badge/skills/zllovesuki/cloudflare-agent-skills/observability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 807 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00047 $0.00807
Opus 5.5 $0.00019 $0.00323
Sonnet 5.5 $0.00009 $0.00161
Haiku 4.5 $0.00005 $0.00081

Measured 2mo ago against content hash 555260571971, 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 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 2mo 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.

async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
skills/observability/SKILL.md · 97 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

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. 2mo ago First seen · 97 lines · 47 tokens per session scan A 555260571971

Subscribe to this mod's changes

observability is a skill published in the GitHub repository zllovesuki/cloudflare-agent-skills (9 stars, last pushed 6mo ago), with no licence file. It adds 47 tokens to every session and 807 once invoked, about $0.0002 per session on Opus 5.5. 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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