Test Guard
amElnagdy/guard-skills
Reviews newly written or edited tests against nine rules that cut test bloat, such as mock-heavy checks and near-duplicate cases, before they are committed.
Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest).
Install Vitest
$ npx skills add pixel-point/animate-text --skill vitest -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install pixel-point/animate-text vitest --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/pixel-point/animate-text.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/vitest .claude/skills/vitest && rm -rf skills-srcUse ~/.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/
Install the "vitest" agent skill from https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitest into .claude/skills/vitest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vitest", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitestType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add pixel-point/animate-text --skill vitest -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install pixel-point/animate-text vitest --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pixel-point/animate-text.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/vitest .agents/skills/vitest && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "vitest" agent skill from https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitest into .agents/skills/vitest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vitest", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add pixel-point/animate-text --skill vitest -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install pixel-point/animate-text vitest --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pixel-point/animate-text.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/vitest .cursor/skills/vitest && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "vitest" agent skill from https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitest into .cursor/skills/vitest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vitest", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/pixel-point/animate-text.git --path .agents/skills/vitest--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add pixel-point/animate-text --skill vitest -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install pixel-point/animate-text vitest --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pixel-point/animate-text.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/vitest .gemini/skills/vitest && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "vitest" agent skill from https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitest into .gemini/skills/vitest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vitest", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install pixel-point/animate-text vitestInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add pixel-point/animate-text --skill vitest -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/pixel-point/animate-text.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/vitest .github/skills/vitest && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "vitest" agent skill from https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitest into .github/skills/vitest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vitest", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add pixel-point/animate-text --skill vitest -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install pixel-point/animate-text vitest --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/pixel-point/animate-text.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/vitest .opencode/skills/vitest && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "vitest" agent skill from https://github.com/pixel-point/animate-text/tree/main/.agents/skills/vitest into .opencode/skills/vitest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vitest", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
vitest- GitHub stars
- 149
- Used in
- 2 other repos
- Token cost
- ~1.3k tokens
- SKILL.md length
- 494 words
- Files
- 50 (incl. references, assets)
- Skills in repo
- 2
- Repo updated
- First seen
- Licence
- None found
At a glance
Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest).
- Works in 8 steps: Async Patterns (CRITICAL) → Test Setup & Isolation (CRITICAL) → Mocking Patterns (HIGH) → …
- Tasks that involve Unit testing
- SKILL.md covers When to Apply, Rule Categories by Priority, Quick Reference and How to Use, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Vitest is an agent skill from pixel-point/animate-text. Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest). This skill should be used when writing or debugging Vitest tests. This skill does NOT cover TDD methodology (use test-tdd skill), API mocking with MSW (use test-msw skill), or Jest-specific APIs.
Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 52 other files, including reference files and assets (for example `AGENTS.md`, `CHANGELOG.md` and `README.md`).
It sits in Testing & QA, covering Unit testing. It works with Vitest and Jest.
When your agent uses it
- Tasks that involve Unit testing
Example prompts
- “/vitest”
Workflow steps
8 steps, taken from the step headings in SKILL.md.
- Async Patterns (CRITICAL)
- Test Setup & Isolation (CRITICAL)
- Mocking Patterns (HIGH)
- Performance (HIGH)
- Snapshot Testing (MEDIUM)
- Environment (MEDIUM)
- Assertions (LOW-MEDIUM)
- Test Organization (LOW)
What it can do on your machine
Read from SKILL.md and the folder at commit 0f783e4. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
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.
Context cost
Vitest loads about 1.3k tokens when it runs, and up to ~26k if it reads all its reference files. Until then it costs about 86 tokens; SKILL.md has 494 words of instructions outside code blocks.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 494 words (~1,271 tokens).
“Comprehensive performance optimization and best practices guide for Vitest testing framework. Contains 44 rules across 8 categories, prioritized by impact to guide test writing, refactoring, and code review.”
- name
- vitest
Files
SKILL.md and 49 other files (references, assets) in .agents/skills/vitest of pixel-point/animate-text.
- SKILL.md
- AGENTS.md
- CHANGELOG.md
- README.md
- assets/templates/_template.md
- references/_sections.md
- references/assert-edge-cases.md
- references/assert-expect-assertions.md
- references/assert-one-assertion-concept.md
- references/assert-specific-matchers.md
- references/assert-toequal-vs-tobe.md
- references/async-act-wrapper.md
- references/async-await-assertions.md
- references/async-concurrent-expect.md
- references/async-error-handling.md
- references/async-fake-timers.md
- references/async-return-promises.md
- references/async-waitfor-polling.md
- … and 32 more
Open the folder on GitHubat commit 0f783e4
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in pixel-point/animate-text, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Vitest 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Vitest this skillpixel-point/animate-text | 149 | 2 repos | ~1.3k | Automated safety check: Pass | None | |
| Test GuardamElnagdy/guard-skills | 1.3k | 2 repos | ~2.1k | Automated safety check: Pass | MIT | |
| Designing TestsCloudAI-X/claude-workflow-v2 | 1.4k | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| Playwright Testingchongdashu/vibejam-starter-pack | 149 | — | ~2.1k | Automated safety check: Pass | None | |
| Playwright Testingchongdashu/vibejam-starter-pack | 149 | — | ~2.2k | Automated safety check: Pass | None | |
| MoAI TDD Workflowmodu-ai/moai-adk | 1.2k | — | ~3.1k | Automated safety check: Pass | Apache-2.0 |
Similar skills
Designing Tests
CloudAI-X/claude-workflow-v2
Designs and implements testing strategies for any codebase. An agent skill from CloudAI-X/claude-workflow-v2.
Playwright Testing
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Plan, implement, and debug frontend tests: unit/integration/E2E/visual/a11y.
Playwright Testing
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MoAI TDD Workflow
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Drives test-first development through the RED, GREEN, REFACTOR cycle, with a config switch that selects between TDD and a DDD workflow for existing code.
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Related
Categories
Questions about Vitest
What does Vitest do?
Vitest testing framework patterns for test setup, async testing, mocking with vi., snapshots, and test performance (formerly test-vitest). Vitest is an agent skill from pixel-point/animate-text., snapshots, and test performance (formerly test-vitest).
When should I use Vitest?
Vitest fits situations like: tasks that involve Unit testing.
How do I install Vitest in Claude Code?
Run `npx skills add pixel-point/animate-text --skill vitest -a claude-code`. Or copy the skill folder (.agents/skills/vitest in pixel-point/animate-text) into .claude/skills/vitest in your project. Claude Code loads it when a task matches its description.
How do I install Vitest in Codex?
Run `npx skills add pixel-point/animate-text --skill vitest -a codex`. Or copy the skill folder (.agents/skills/vitest in pixel-point/animate-text) into .agents/skills/vitest in your project. Codex loads it when a task matches its description.
Can I use Vitest 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 pixel-point/animate-text --skill vitest -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, .gemini/skills/vitest, .github/skills/vitest and .opencode/skills/vitest in your project.
What does Vitest need to run?
SKILL.md names no scripts, command-line tools or credentials: Vitest is instructions for the agent only.
Does Vitest 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 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 use?
No licence was found for Vitest or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Vitest use?
About 1.3k tokens (SKILL.md is roughly 5.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 24k tokens, read only when the agent opens those files.
What are the alternatives to Vitest?
Skills that share tags, products or a category with Vitest: Test Guard (amElnagdy/guard-skills, 1.3k stars), Designing Tests (CloudAI-X/claude-workflow-v2, 1.4k stars), Playwright Testing (chongdashu/vibejam-starter-pack, 149 stars) and Playwright Testing (chongdashu/vibejam-starter-pack, 149 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Vitest?
pixel-point (a GitHub organization) maintains it in pixel-point/animate-text, which has 149 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on April 24, 2026.
Source: pixel-point/animate-text on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.