vitest-testing SKILL.md skillA
vitest-testing from secondsky/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add secondsky/claude-skills/vitest-testing@git:20260803.01cc414Pins git:20260803.01cc414 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- secondsky/claude-skills
- Path
plugins/vitest-testing/skills/vitest-testing/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260803.01cc414, committed Aug 3, 2026
- First version recorded
- Dec 24, 2025
- Size
- 4,783 bytes
- Repository stars
- 247
- License
- MIT
Modern TypeScript/JavaScript testing with Vitest. Fast unit and integration tests, native ESM support, Vite-powered HMR, and comprehensive mocking. Use for testing TS/JS projects.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Vitest Testing
Expert knowledge for testing JavaScript/TypeScript projects using Vitest - a blazingly fast testing framework powered by Vite.
## Quick Start
### Installation
```bash
# Using Bun (recommended)
bun add -d vitest
# Using npm
npm install -D vitest
```
### Configuration
```typescript
// vitest.config.ts
import { defineConfig } from 'vitest/config'
export default defineConfig({
test: {
globals: true,
environment: 'node', // or 'jsdom'
coverage: {
provider: 'v8',
reporter: ['text', 'json', 'html'],
thresholds: { lines: 80, functions: 80, branches: 80 },
},
include: ['**/*.{test,spec}.{js,ts,jsx,tsx}'],
},
})
```
## Running Tests
```bash
# Run all tests (prefer bun)
bun test
# Watch mode (default)
bun test --watch
# Run once (CI mode)
bun test --run
# With coverage
bun test --coverage
# Specific file
bun test src/utils/math.test.ts
# Pattern matching
bun test --grep="calculates sum"
# UI mode (interactive)
bun test --ui
# Verbose output (in Vitest 2+, --reporter=verbose prints a flat list;
# use --reporter=tree for the hierarchical tree view)
bun test --reporter=verbose
```
## Writing Tests
### Basic Structure
…Read the whole file at its exact version.
How to install
mdr add secondsky/claude-skills/vitest-testing@sha256:7d7b15e10741b21cThe line at the top of this page pins the label git:20260803.01cc414, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xec7nws6io4xyq62)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Dec 24, 2025 and Aug 3, 2026, about one every 111 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260803.01cc414 latest | 2026-08-03 | 01cc414 | 4,783 B | A | view · diff |
| git:20260402.75421fa | 2026-04-02 | 75421fa | 4,675 B | A | view · diff |
| git:20251224.ba827ce | 2025-12-24 | ba827ce | 4,662 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4783 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
secondsky/claude-skills · 247 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xec7nws6io4xyq62 GET https://markdownregistry.com/api/v1/resolve?ref=secondsky/claude-skills/vitest-testing GET https://markdownregistry.com/api/v1/blob/7d7b15e10741b21cccbc5ceaa702c4d16c99d7081fa55c6d779ac8f04f6dfce7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.