vitest

vitest is a cursor rule for Cursor from iHildy/jules-task-queue. It costs 0 tokens per session (3,726 once invoked), scanned A, original, MIT.

A set of project rules for Vitest, a JavaScript and TypeScript tool for running automated unit tests.

In plain words
What is it for?
Use it when writing or reviewing tests for JavaScript, TypeScript, React, Vue, Svelte, or related source files.
Why use it?
It sets consistent test locations, naming, and practices so tests remain easier to find, maintain, and trust as the codebase changes.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when writing or reviewing tests for JavaScript, TypeScript, React, Vue, Svelte, or related source files.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/ihildy/jules-task-queue/vitest
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.

Clone the repo
git clone --depth 1 https://github.com/iHildy/jules-task-queue

Made for: Cursor.

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 vitest

README.md
[![agentmods](https://agentmods.dev/badge/rules/ihildy/jules-task-queue/vitest/github.svg)](https://agentmods.dev/rules/ihildy/jules-task-queue/vitest)
Your own site
<a href="https://agentmods.dev/rules/ihildy/jules-task-queue/vitest"><img src="https://agentmods.dev/badge/rules/ihildy/jules-task-queue/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.

agentmods 80×15 button for vitest

Your own site · 80×15
<a href="https://agentmods.dev/rules/ihildy/jules-task-queue/vitest"><img src="https://agentmods.dev/badge/rules/ihildy/jules-task-queue/vitest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 3,726 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00000 $0.03726
Opus 5.5 $0.00000 $0.01490
Sonnet 5.5 $0.00000 $0.00745
Haiku 4.5 $0.00000 $0.00373

Measured 13d ago against content hash cab33aa4ab3b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 13d 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.

.cursor/rules/vitest.mdc · 379 lines

How it starts

The opening of the file, as written. The whole thing — 379 lines — stays where its author put it; the contents beside it link to each section on GitHub.


description: This rule file provides comprehensive best practices for using Vitest, covering code organization, testing strategies, performance, and security within Vitest projects. These guidelines ensure clean, maintainable, and reliable test suites. globs: .js,.jsx,.ts,.tsx,.vue,.svelte,.spec,.test.*

Vitest Best Practices and Coding Standards

This document outlines best practices for using Vitest to create reliable, maintainable, and performant test suites. It covers various aspects of testing, from code organization to performance considerations and security measures.

Project Tech Stack:

ALWAYS USE THE FOLLOWING IN CONJUNCTION WITH EACHOTHER TO HAVE A SAFE CODEBASE WHERE WE CAN MOVE FAST AND BREAK NOTHING

  • Next.js
  • Typescript + ESlint
  • Zod + Prisma + tRPC + React Query
  • Prisma (supabase) + Redis
  • ShadCN + TailwindCSS v4
  • Vitest Unit Tests

1. Code Organization and Structure

1.1 Directory Structure

  • Keep tests close to the source code: Place test files in the same directory as the components or modules they test. This improves discoverability and maintainability.

    src/ components/ MyComponent.vue MyComponent.spec.ts MyComponent.test.ts # Alternative naming utils/ math.ts math.test.ts App.vue App.spec.ts

  • Use a dedicated tests directory for end-to-end tests or shared utilities: For larger projects, a tests directory at the root level can house end-to-end tests, integration tests that require a specific environment, or shared testing utilities.

    tests/ e2e/ specs/ home.spec.ts support/ commands.ts unit/ utils.test.ts # Tests for general utilities integration/ db.setup.ts # Setup for integration tests src/ ...

1.2 File Naming Conventions

  • Use consistent naming: Adopt a consistent naming scheme for test files. Common conventions include:
    • [component/module].spec.ts
    • [component/module].test.ts
    • [component/module].e2e.ts (for end-to-end tests)
  • Consistent Case: Maintain a consistent casing convention (e.g., camelCase for variables, PascalCase for components). Use kebab-case for file names e.g. user-profile.tsx or user.router.ts

Read the full file on GitHub · 379 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. 13d ago First seen · 379 lines · 3,726 tokens per session scan A cab33aa4ab3b

Subscribe to this mod's changes

vitest is a cursor rule published in the GitHub repository iHildy/jules-task-queue (17 stars, last pushed 8mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,726 tokens. 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 2026-10-02.