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Agent skill

Cloudflare Workers Otel Utels

by mizchi in mizchi/skills

Cloudflare Worker telemetry at the fetch boundary — OTLP traces / metrics / logs + utels error tracking + D1 Proxy that emits slow-query warnings.

No licenceAuto-check: notesDevOps & Cloud

Install Cloudflare Workers Otel Utels

skills CLI
$ npx skills add mizchi/skills --skill cloudflare-workers-otel-utels -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mizchi/skills cloudflare-workers-otel-utels --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mizchi/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cloudflare-workers-otel-utels .claude/skills/cloudflare-workers-otel-utels && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
cloudflare-workers-otel-utels
GitHub stars
360
Token cost
~1.4k tokens
SKILL.md length
507 words
Files
6 (incl. assets)
Skills in repo
69
Repo updated
First seen
Licence
None found

At a glance

Cloudflare Worker telemetry at the fetch boundary — OTLP traces / metrics / logs + utels error tracking + D1 Proxy that emits slow-query warnings.

  • Adding observability to a Worker without touching handler code
  • SKILL.md covers When to invoke, What's in here, Wiring and Slow-query independence, plus 2 more sections
  • Runs TypeScript scripts from its folder; calls pnpm; reaches utels.dev; needs UTELS_INGEST_TOKEN
  • Tasks that involve Query optimization

What it does

Cloudflare Workers Otel Utels is an agent skill from mizchi/skills. Cloudflare Worker telemetry at the fetch boundary — OTLP traces / metrics / logs + utels error tracking + D1 Proxy that emits slow-query warnings. Use when adding observability to a Worker without touching handler code.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including assets (for example `README.md`, `assets/scripts/d1-wrap.ts` and `assets/scripts/telemetry-runtime.ts`).

It sits in DevOps & Cloud, covering Query optimization and Observability. It works with OpenTelemetry and Cloudflare Workers. The repository describes itself as: Agent skills by mizchi, distributed via APM.

When your agent uses it

  • Adding observability to a Worker without touching handler code
  • Tasks that involve Query optimization
  • Tasks that involve Observability

Example prompts

  • “/cloudflare-workers-otel-utels”

Requirements

  • Node.js
  • A credential in UTELS_INGEST_TOKEN

What it can do on your machine

Read from SKILL.md and the folder at commit 62f5808. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships script files (TypeScript), which the agent can run.

    Shell commands in SKILL.md call:

    • pnpm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • utels.dev

    Also links to:

    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • UTELS_INGEST_TOKEN

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Cloudflare Workers Otel Utels loads about 1.4k tokens when it runs. Until then it costs about 62 tokens; SKILL.md has 507 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~62
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteMentions a .env fileSKILL.md:81
    exec cf deploy --dry-run --secrets-file .env.production
  • NoteMentions a .env fileSKILL.md:82
    pnpm exec cf deploy --secrets-file .env.production

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 507 words (~1,417 tokens).

“Two wrappers that compose around a Worker's {fetch, scheduled} handler. Both are no-op pass-throughs unless their env vars are present, so you can run with neither, just one, or both.”

— opening of SKILL.md by mizchi
name
cloudflare-workers-otel-utels

Read the full SKILL.md on GitHub

Files

SKILL.md and 5 other files (assets) in cloudflare-workers-otel-utels of mizchi/skills.

  • SKILL.md
  • README.md
  • assets/scripts/d1-wrap.ts
  • assets/scripts/telemetry-runtime.ts
  • assets/tests/d1-wrap.test.ts
  • assets/tests/telemetry.test.ts

Open the folder on GitHubat commit 62f5808

Compare with similar skills

Cloudflare Workers Otel Utels next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Cloudflare Workers Otel Utels compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Cloudflare Workers Otel Utels this skillmizchi/skills360—~1.4kAutomated safety check: NotesNone
Database Observabilitygrafana/skills282—~1.1kAutomated safety check: PassApache-2.0
Effect Httpapi Workers PatternsConsensys/c0105—~1.4kAutomated safety check: PassLGPL-3.0
Database ObservabilityKilo-Org/kilo-marketplace190—~1.4kAutomated safety check: PassApache-2.0
Motel Debugkitlangton/motel298—~2.2kAutomated safety check: PassMIT
Observability Triageevery-app/open-seo23k—~1.7kAutomated safety check: PassMIT

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Works with

Categories

Questions about Cloudflare Workers Otel Utels

What does Cloudflare Workers Otel Utels do?

Cloudflare Worker telemetry at the fetch boundary — OTLP traces / metrics / logs + utels error tracking + D1 Proxy that emits slow-query warnings. Cloudflare Workers Otel Utels is an agent skill from mizchi/skills. Cloudflare Worker telemetry at the fetch boundary — OTLP traces / metrics / logs + utels error tracking + D1 Proxy that emits slow-query warnings.

When should I use Cloudflare Workers Otel Utels?

Cloudflare Workers Otel Utels fits situations like: adding observability to a Worker without touching handler code; tasks that involve Query optimization; tasks that involve Observability.

How do I install Cloudflare Workers Otel Utels in Claude Code?

Run `npx skills add mizchi/skills --skill cloudflare-workers-otel-utels -a claude-code`. Or copy the skill folder (cloudflare-workers-otel-utels in mizchi/skills) into .claude/skills/cloudflare-workers-otel-utels in your project. Claude Code loads it when a task matches its description.

How do I install Cloudflare Workers Otel Utels in Codex?

Run `npx skills add mizchi/skills --skill cloudflare-workers-otel-utels -a codex`. Or copy the skill folder (cloudflare-workers-otel-utels in mizchi/skills) into .agents/skills/cloudflare-workers-otel-utels in your project. Codex loads it when a task matches its description.

Can I use Cloudflare Workers Otel Utels in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mizchi/skills --skill cloudflare-workers-otel-utels -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cloudflare-workers-otel-utels, .gemini/skills/cloudflare-workers-otel-utels, .github/skills/cloudflare-workers-otel-utels and .opencode/skills/cloudflare-workers-otel-utels in your project.

What does Cloudflare Workers Otel Utels need to run?

Going by SKILL.md and its folder, Cloudflare Workers Otel Utels needs TypeScript for the scripts in its folder, the command-line tools its instructions call (pnpm) and credentials named UTELS_INGEST_TOKEN. Our summary lists: Node.js; A credential in UTELS_INGEST_TOKEN.

Does Cloudflare Workers Otel Utels access the network?

SKILL.md names 2 domains. In commands or code: utels.dev; the agent is likely to contact it when it follows the instructions. As links in the text: github.com. This is read from the text; nothing was executed.

Is Cloudflare Workers Otel Utels safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Cloudflare Workers Otel Utels use?

No licence was found for Cloudflare Workers Otel Utels or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Cloudflare Workers Otel Utels use?

About 1.4k tokens (SKILL.md is roughly 5.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Cloudflare Workers Otel Utels?

Skills that share tags, products or a category with Cloudflare Workers Otel Utels: Database Observability (grafana/skills, 282 stars), Effect Httpapi Workers Patterns (Consensys/c0, 105 stars), Database Observability (Kilo-Org/kilo-marketplace, 190 stars) and Motel Debug (kitlangton/motel, 298 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Cloudflare Workers Otel Utels?

mizchi (a GitHub user) maintains it in mizchi/skills, which has 360 GitHub stars. The repository holds 69 skills in this directory. The repository was last updated on October 2, 2026.

Source: mizchi/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.