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.
npx skills add aj-geddes/useful-ai-prompts --skill frontend-testinggit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote 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.
[](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/frontend-testing)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/frontend-testing"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/frontend-testing/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.
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/frontend-testing"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/frontend-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.00582 |
| Opus 5 | $0.00016 | $0.00291 |
| Sonnet 5 | $0.00006 | $0.00116 |
| Haiku 4.5 | $0.00003 | $0.00058 |
Grade A, and why
frontend-testing 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Testing
Table of Contents
Overview
Build comprehensive test suites for frontend applications including unit tests, integration tests, and end-to-end tests with proper coverage and assertions.
When to Use
- Component testing
- Integration testing
- End-to-end testing
- Regression prevention
- Quality assurance
- Test-driven development
Quick Start
Minimal working example:
// Button.test.tsx
import { render, screen, fireEvent } from '@testing-library/react';
import '@testing-library/jest-dom';
import { Button } from './Button';
describe('Button Component', () => {
it('renders button with text', () => {
render(<Button>Click me</Button>);
expect(screen.getByRole('button')).toHaveTextContent('Click me');
});
it('calls onClick handler when clicked', () => {
const handleClick = jest.fn();
render(<Button onClick={handleClick}>Click</Button>);
fireEvent.click(screen.getByRole('button'));
expect(handleClick).toHaveBeenCalledTimes(1);
});
it('disables button when disabled prop is true', () => {
render(<Button disabled>Click me</Button>);
expect(screen.getByRole('button')).toBeDisabled();
});
it('applies variant styles correctly', () => {
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Jest Unit Testing (React) | Jest Unit Testing (React) |
| React Testing Library Integration Tests | React Testing Library Integration Tests |
| Vitest for Vue Testing | Vitest for Vue Testing |
| Cypress E2E Testing | Cypress E2E Testing |
| Test Coverage Configuration | Test Coverage Configuration |
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/cypress-e2e-testing.md 2.5 KB
- references/jest-unit-testing-react.md 2.2 KB
- references/react-testing-library-integration-tests.md 3.0 KB
- references/test-coverage-configuration.md 966 B
- references/vitest-for-vue-testing.md 1.4 KB
- scripts/scaffold-tests.sh 574 B runs code
- templates/test-template.js 541 B runs code
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.
- 9d ago First seen · 91 lines · 32 tokens per session scan A 137887fa0337
frontend-testing is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 32 tokens to every session and 582 once invoked, about $0.0002 per session on Opus 5. 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 2026-09-03.
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