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Agent skill

Vitest Test Creator

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Create vitest test creator operations. An agent skill from jeremylongshore/tons-of-skills-marketplace.

MITAuto-check passedTesting & QA

Install Vitest Test Creator

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill vitest-test-creator -a claude-code

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

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace vitest-test-creator --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/09-test-automation/vitest-test-creator .claude/skills/vitest-test-creator && 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
vitest-test-creator
GitHub stars
2.8k
Token cost
~554 tokens
SKILL.md length
196 words
Files
1
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Create vitest test creator operations. An agent skill from jeremylongshore/tons-of-skills-marketplace.

  • Works in 4 steps: Provides step-by-step guidance for… → Follows industry best practices and… → Generates production-ready code and… → …
  • : vitest test creator
  • SKILL.md covers Overview, When to Use, Instructions and Examples, plus 5 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Vitest Test Creator is an agent skill from jeremylongshore/tons-of-skills-marketplace. Create vitest test creator operations. Auto-activating skill for Test Automation. Triggers on: vitest test creator, vitest test creator Part of the Test Automation skill category. Use when writing or running tests. Trigger with phrases like "vitest test creator", "vitest creator", "vitest".

Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Designed for Claude Code

It sits in Testing & QA, covering Unit testing. It works with Vitest. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • : vitest test creator
  • Vitest test creator Part of the Test Automation skill category
  • With phrases like vitest test creator

Example prompts

  • “vitest test creator”
  • “vitest creator”
  • “vitest”
  • “/vitest-test-creator”

Requirements

  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(cmd:*), Grep

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Provides step-by-step guidance for vitest test creator
  2. Follows industry best practices and patterns
  3. Generates production-ready code and configurations
  4. Validates outputs against common standards

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Bash(cmd:*)
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    No URLs in SKILL.md.

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

  • Credentials

    Names no API keys, tokens, secrets or passwords.

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

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Vitest Test Creator loads about 554 tokens when it runs. Until then it costs about 78 tokens; SKILL.md has 196 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~78
When it runs · the whole SKILL.md, loaded when a task matches
~554

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 passed

The automated check found no risky patterns in SKILL.md.

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

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 196 words, ~554 tokens.

Download SKILL.mdSave it as .claude/skills/vitest-test-creator/SKILL.md (or your agent's skills folder).
name
vitest-test-creator
description
Create vitest test creator operations. Auto-activating skill for Test Automation. Triggers on: vitest test creator, vitest test creator Part of the Test Automation skill category. Use when writing or running tests. Trigger with phrases like "vitest test creator", "vitest creator", "vitest".
allowed-tools
Read, Write, Edit, Bash(cmd:*), Grep
compatibility
Designed for Claude Code
version
1.0.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
testing, automation

Vitest Test Creator

Overview

This skill provides automated assistance for vitest test creator tasks within the Test Automation domain.

When to Use

This skill activates automatically when you:

  • Mention "vitest test creator" in your request
  • Ask about vitest test creator patterns or best practices
  • Need help with test automation skills covering unit testing, integration testing, mocking, and test framework configuration.

Instructions

  1. Provides step-by-step guidance for vitest test creator
  2. Follows industry best practices and patterns
  3. Generates production-ready code and configurations
  4. Validates outputs against common standards

Examples

Example: Basic Usage Request: "Help me with vitest test creator" Result: Provides step-by-step guidance and generates appropriate configurations

Prerequisites

  • Relevant development environment configured
  • Access to necessary tools and services
  • Basic understanding of test automation concepts

Output

  • Generated configurations and code
  • Best practice recommendations
  • Validation results

Error Handling

ErrorCauseSolution
Configuration invalidMissing required fieldsCheck documentation for required parameters
Tool not foundDependency not installedInstall required tools per prerequisites
Permission deniedInsufficient accessVerify credentials and permissions

Resources

  • Official documentation for related tools
  • Best practices guides
  • Community examples and tutorials

Part of the Test Automation skill category. Tags: testing, jest, pytest, mocking, tdd

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/09-test-automation/vitest-test-creator of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit cfae287

Compare with similar skills

Vitest Test Creator 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.

Vitest Test Creator compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Vitest Test Creator this skilljeremylongshore/tons-of-skills-marketplace2.8k—~554Automated safety check: PassMIT
Test Writing WorkflowiOfficeAI/AionUi33k1 repos~1.2kAutomated safety check: PassApache-2.0
Vitestsupabase/supabase111k12 repos~1.1kAutomated safety check: PassApache-2.0
Test GuardamElnagdy/guard-skills1.3k2 repos~2.1kAutomated safety check: PassMIT
Adding LLM MCP ToolsTriliumNext/Trilium38k—~2.5kAutomated safety check: PassAGPL-3.0
Concept Page Test Writerleonardomso/33-js-concepts67k—~5.5kAutomated safety check: PassMIT

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Works with

Categories

Questions about Vitest Test Creator

What does Vitest Test Creator do?

Create vitest test creator operations. An agent skill from jeremylongshore/tons-of-skills-marketplace. Vitest Test Creator is an agent skill from jeremylongshore/tons-of-skills-marketplace. Create vitest test creator operations.

When should I use Vitest Test Creator?

Vitest Test Creator fits situations like: : vitest test creator; vitest test creator Part of the Test Automation skill category; with phrases like vitest test creator.

How do I install Vitest Test Creator in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill vitest-test-creator -a claude-code`. Or copy the skill folder (skills/09-test-automation/vitest-test-creator in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/vitest-test-creator in your project. Claude Code loads it when a task matches its description.

How do I install Vitest Test Creator in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill vitest-test-creator -a codex`. Or copy the skill folder (skills/09-test-automation/vitest-test-creator in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/vitest-test-creator in your project. Codex loads it when a task matches its description.

Can I use Vitest Test Creator 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 jeremylongshore/tons-of-skills-marketplace --skill vitest-test-creator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/vitest-test-creator, .gemini/skills/vitest-test-creator, .github/skills/vitest-test-creator and .opencode/skills/vitest-test-creator in your project.

What does Vitest Test Creator need to run?

SKILL.md names no scripts, command-line tools or credentials: Vitest Test Creator is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(cmd:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Vitest Test Creator access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Vitest Test Creator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Vitest Test Creator use?

Vitest Test Creator is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Vitest Test Creator use?

About 554 tokens (SKILL.md is roughly 2.2k 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 Vitest Test Creator?

Skills that share tags, products or a category with Vitest Test Creator: Test Writing Workflow (iOfficeAI/AionUi, 33k stars), Vitest (supabase/supabase, 111k stars), Test Guard (amElnagdy/guard-skills, 1.3k stars) and Adding LLM MCP Tools (TriliumNext/Trilium, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Vitest Test Creator?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

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