workers-test-generator

workers-test-generator is an agent for coding agents from secondsky/claude-skills. It costs 41 tokens per session (3,622 once invoked), scanned A, original, MIT.

A test-generation agent for Cloudflare Workers that creates Vitest tests, including tests for requests and responses and mock versions of Worker services. It detects Worker code that lacks matching tests and checks coverage.

In plain words
What is it for?
Use it to generate unit and integration tests for handlers, functions, routes, D1, KV, R2, Durable Objects, queues, AI, and Vectorize bindings.
Why use it?
It reduces the time needed to write an initial test suite and makes it easier to notice untested routes, functions, and service bindings.

Agent

Part of the cloudflare-workers plugin — 10 skills, 5 commands, 3 agents 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 agents/secondsky/claude-skills/workers-test-generator
Clone the repo
git clone --depth 1 https://github.com/secondsky/claude-skills

Or install cloudflare-workers, the plugin that ships this one along with the rest of its 10 skills, 5 commands, 3 agents.

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 workers-test-generator

README.md
[![agentmods](https://agentmods.dev/badge/agents/secondsky/claude-skills/workers-test-generator.svg)](https://agentmods.dev/agents/secondsky/claude-skills/workers-test-generator)
Your own site
<a href="https://agentmods.dev/agents/secondsky/claude-skills/workers-test-generator"><img src="https://agentmods.dev/badge/agents/secondsky/claude-skills/workers-test-generator.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,622 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 $0.00041 $0.03622
Opus 5 $0.00020 $0.01811
Sonnet 5 $0.00008 $0.00724
Haiku 4.5 $0.00004 $0.00362

Measured yesterday against content hash ded5b6456e13, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

workers-test-generator 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 yesterday.

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, env, ctx) { ... }
plugins/cloudflare-workers/agents/workers-test-generator.md · 517 lines

How it starts

The opening of the file, as written. The whole thing — 517 lines — stays where its author put it; the contents beside it link to each section on GitHub.

When to Use This Agent

Use the workers-test-generator agent when:

  • User explicitly requests test generation ("generate tests", "create tests", "write tests for my Worker")
  • You detect Worker files without corresponding test files (proactive trigger)
  • User wants to improve test coverage
  • User is setting up a new Workers project and needs initial tests

System Prompt

You are an expert Cloudflare Workers testing specialist. Your role is to autonomously generate comprehensive, production-quality test suites for Workers projects using Vitest and @cloudflare/vitest-pool-workers.

Core Capabilities

  • Code Analysis: Parse Worker code to extract handlers, exports, functions, and bindings
  • Binding Detection: Identify D1, KV, R2, Durable Objects, Queues, AI, Vectorize usage
  • Test Generation: Create unit tests, integration tests, and binding mocks
  • Coverage Optimization: Ensure all public functions and routes are tested
  • Auto-Application: Write generated tests directly to appropriate files

Read the full file on GitHub · 517 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. yesterday First seen · 517 lines · 41 tokens per session scan A ded5b6456e13

Subscribe to this mod's changes

workers-test-generator is an agent published in the GitHub repository secondsky/claude-skills (214 stars, last pushed yesterday), licensed MIT. It adds 41 tokens to every session and 3,622 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 2026-09-03.

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