Testing Patterns
softspark/ai-toolkit
Testing strategy: pyramid, AAA, mocks/fakes/stubs, flaky tests, coverage.
Test-Driven Development (TDD) using Vitest and TypeScript. An agent skill from aiskillstore/marketplace.
Install TDD Vitest Typescript
$ npx skills add aiskillstore/marketplace --skill tdd-vitest-typescript -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace tdd-vitest-typescript --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/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/emz1998/tdd-vitest-typescript .claude/skills/tdd-vitest-typescript && 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 "tdd-vitest-typescript" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescript into .claude/skills/tdd-vitest-typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-vitest-typescript", 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/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescriptType 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 aiskillstore/marketplace --skill tdd-vitest-typescript -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace tdd-vitest-typescript --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/emz1998/tdd-vitest-typescript .agents/skills/tdd-vitest-typescript && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tdd-vitest-typescript" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescript into .agents/skills/tdd-vitest-typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-vitest-typescript", 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 aiskillstore/marketplace --skill tdd-vitest-typescript -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace tdd-vitest-typescript --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/emz1998/tdd-vitest-typescript .cursor/skills/tdd-vitest-typescript && 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 "tdd-vitest-typescript" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescript into .cursor/skills/tdd-vitest-typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-vitest-typescript", 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/aiskillstore/marketplace.git --path skills/emz1998/tdd-vitest-typescript--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 aiskillstore/marketplace --skill tdd-vitest-typescript -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace tdd-vitest-typescript --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/emz1998/tdd-vitest-typescript .gemini/skills/tdd-vitest-typescript && 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 "tdd-vitest-typescript" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescript into .gemini/skills/tdd-vitest-typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-vitest-typescript", 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 aiskillstore/marketplace tdd-vitest-typescriptInstalls 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 aiskillstore/marketplace --skill tdd-vitest-typescript -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/emz1998/tdd-vitest-typescript .github/skills/tdd-vitest-typescript && 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 "tdd-vitest-typescript" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescript into .github/skills/tdd-vitest-typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-vitest-typescript", 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 aiskillstore/marketplace --skill tdd-vitest-typescript -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace tdd-vitest-typescript --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/emz1998/tdd-vitest-typescript .opencode/skills/tdd-vitest-typescript && 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 "tdd-vitest-typescript" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/emz1998/tdd-vitest-typescript into .opencode/skills/tdd-vitest-typescript/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd-vitest-typescript", 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
tdd-vitest-typescript- GitHub stars
- 430
- Token cost
- ~3.3k tokens
- SKILL.md length
- 508 words
- Files
- 5 (incl. scripts, references)
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
Test-Driven Development (TDD) using Vitest and TypeScript. An agent skill from aiskillstore/marketplace.
- Works in 3 steps: Red: Write a failing test that defines… → Green: Write minimal code to make the… → Refactor: Improve code quality while…
- The user requests help with TDD
- SKILL.md covers Core TDD Cycle:…, Vitest Setup and Configuration, Test File Organization and TypeScript Testing Patterns, plus 4 more sections
- Runs JavaScript scripts from its folder; calls vitest
What it does
TDD Vitest Typescript is an agent skill from aiskillstore/marketplace. Test-Driven Development (TDD) using Vitest and TypeScript. Use when the user requests help with TDD, writing tests before code, test-first development, Vitest test setup, TypeScript testing patterns, unit testing, integration testing, or following the Red-Green-Refactor cycle with Vitest.
Its SKILL.md is about 3.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including scripts and reference files (for example `references/advanced-patterns.md`, `references/anti-patterns.md` and `scripts/setup-vitest.js`).
It sits in Testing & QA, covering Test-driven development and Unit testing. It works with Vitest and TypeScript. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- The user requests help with TDD
- Writing tests before code
- Test-first development
- Vitest test setup
Example prompts
- “/tdd-vitest-typescript”
Requirements
- Node.js
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Red: Write a failing test that defines desired behavior
- Green: Write minimal code to make the test pass
- Refactor: Improve code quality while keeping tests green
What it can do on your machine
Read from SKILL.md and the folder at commit 755bc35. 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
Ships 1 file in scripts/ (JavaScript), which the agent can run.
Shell commands in SKILL.md call:
vitest
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
TDD Vitest Typescript loads about 3.3k tokens when it runs, and up to ~9.8k if it reads all its reference files. Until then it costs about 78 tokens; SKILL.md has 508 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); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 508 words (~3,251 tokens).
“Guide Claude through Test-Driven Development workflows using Vitest and TypeScript.”
- name
- tdd-vitest-typescript
Files
SKILL.md and 4 other files (scripts, references) in skills/emz1998/tdd-vitest-typescript of aiskillstore/marketplace.
- SKILL.md
- references/advanced-patterns.md
- references/anti-patterns.md
- scripts/setup-vitest.js
- skill-report.json
Open the folder on GitHubat commit 755bc35
Compare with similar skills
TDD Vitest Typescript 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 |
|---|---|---|---|---|---|---|
| TDD Vitest Typescript this skillaiskillstore/marketplace | 430 | — | ~3.3k | Automated safety check: Pass | None | |
| Testing Patternssoftspark/ai-toolkit | 179 | — | ~1.6k | Automated safety check: Pass | Apache-2.0 | |
| Test Writing WorkflowiOfficeAI/AionUi | 33k | 1 repos | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| Creating A Packagec15t/c15t | 1.9k | — | ~913 | Automated safety check: Pass | Apache-2.0 | |
| Svelte Testingspences10/sveltest | 113 | — | ~579 | Automated safety check: Pass | MIT | |
| Effect TStellahq/opensession | 392 | — | ~3.7k | Automated safety check: Pass | MIT |
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Related
Works with
Categories
Questions about TDD Vitest Typescript
What does TDD Vitest Typescript do?
Test-Driven Development (TDD) using Vitest and TypeScript. An agent skill from aiskillstore/marketplace. TDD Vitest Typescript is an agent skill from aiskillstore/marketplace. Test-Driven Development (TDD) using Vitest and TypeScript.
When should I use TDD Vitest Typescript?
TDD Vitest Typescript fits situations like: the user requests help with TDD; writing tests before code; test-first development; vitest test setup.
How do I install TDD Vitest Typescript in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill tdd-vitest-typescript -a claude-code`. Or copy the skill folder (skills/emz1998/tdd-vitest-typescript in aiskillstore/marketplace) into .claude/skills/tdd-vitest-typescript in your project. Claude Code loads it when a task matches its description.
How do I install TDD Vitest Typescript in Codex?
Run `npx skills add aiskillstore/marketplace --skill tdd-vitest-typescript -a codex`. Or copy the skill folder (skills/emz1998/tdd-vitest-typescript in aiskillstore/marketplace) into .agents/skills/tdd-vitest-typescript in your project. Codex loads it when a task matches its description.
Can I use TDD Vitest Typescript 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 aiskillstore/marketplace --skill tdd-vitest-typescript -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tdd-vitest-typescript, .gemini/skills/tdd-vitest-typescript, .github/skills/tdd-vitest-typescript and .opencode/skills/tdd-vitest-typescript in your project.
What does TDD Vitest Typescript need to run?
Going by SKILL.md and its folder, TDD Vitest Typescript needs JavaScript for the scripts in its folder and the command-line tools its instructions call (vitest). Our summary lists: Node.js.
Does TDD Vitest Typescript 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 TDD Vitest Typescript 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does TDD Vitest Typescript use?
No licence was found for TDD Vitest Typescript or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does TDD Vitest Typescript use?
About 3.3k tokens (SKILL.md is roughly 13k 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 6.6k tokens, read only when the agent opens those files.
What are the alternatives to TDD Vitest Typescript?
Skills that share tags, products or a category with TDD Vitest Typescript: Testing Patterns (softspark/ai-toolkit, 179 stars), Test Writing Workflow (iOfficeAI/AionUi, 33k stars), Creating A Package (c15t/c15t, 1.9k stars) and Svelte Testing (spences10/sveltest, 113 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains TDD Vitest Typescript?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 9, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.