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.
npx skills add Zephyrex21/claude-skills-vetted --skill vitestgit clone --depth 1 https://github.com/Zephyrex21/claude-skills-vettedWrote 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.
[](https://agentmods.dev/skills/zephyrex21/claude-skills-vetted/vitest)<a href="https://agentmods.dev/skills/zephyrex21/claude-skills-vetted/vitest"><img src="https://agentmods.dev/badge/skills/zephyrex21/claude-skills-vetted/vitest/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.
<a href="https://agentmods.dev/skills/zephyrex21/claude-skills-vetted/vitest"><img src="https://agentmods.dev/badge/skills/zephyrex21/claude-skills-vetted/vitest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00059 | $0.01916 |
| Opus 5 | $0.00030 | $0.00958 |
| Sonnet 5 | $0.00012 | $0.00383 |
| Haiku 4.5 | $0.00006 | $0.00192 |
Grade A, and why
vitest scanned grade A with 0 findings 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 12d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
22 files 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.
- api/expect.md 1.5 KB
- api/mocking.md 1.1 KB
- api/test-api.md 1.6 KB
- api/vi-utility.md 1.5 KB
- examples/browser-mode.md 1.6 KB
- examples/component-testing.md 1.9 KB
- examples/config/basic-config.md 1.3 KB
- examples/config/browser-config.md 1.6 KB
- examples/config/environment.md 1.6 KB
- examples/coverage.md 1.5 KB
- examples/features.md 1.5 KB
- examples/getting-started.md 1.3 KB
- examples/mocking.md 1.5 KB
- examples/snapshots.md 1.5 KB
- examples/test-api.md 1.8 KB
- examples/trace-view.md 673 B
- examples/ui.md 982 B
- examples/visual-regression-testing.md 924 B
- LICENSE 45 KB
- LICENSE.txt 11 KB
- templates/test-examples.md 1.9 KB
- templates/vitest-config.md 1.4 KB
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.
- 12d ago First seen · 182 lines · 59 tokens per session scan A fdd55fe1ec12
vitest is a skill published in the GitHub repository Zephyrex21/claude-skills-vetted (2 stars, last pushed 1mo ago), with no licence file. It adds 59 tokens to every session and 1,916 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
DUnitX Testing Patterns
Unit testing patterns with DUnitX for Delphi — fixtures, mocking, integration tests.
csharp-testing-standards
Defines the testing standards, patterns, and conventions for all C# unit and integration test projects. Rules cover test framework usage, naming, structure, mocking, assertions, and parameterization. Apply these rules uniformly across all test projects.
util-function
Creates a well-typed, tested utility function from a description.
javascript-typescript-jest
Best practices for writing JavaScript/TypeScript tests using Jest, including mocking strategies, test structure, and common patterns.
migrate-to-shoehorn
Migrate test files from as type assertions to @total-typescript/shoehorn. Use when user mentions shoehorn, wants to replace as in tests, or needs partial test data.
typescript
TypeScript strict mode with eslint and jest.