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 LambdaTest/agent-skills --skill testcafe-skillgit clone --depth 1 https://github.com/LambdaTest/agent-skillsWrote 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/lambdatest/agent-skills/testcafe-skill)<a href="https://agentmods.dev/skills/lambdatest/agent-skills/testcafe-skill"><img src="https://agentmods.dev/badge/skills/lambdatest/agent-skills/testcafe-skill/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/lambdatest/agent-skills/testcafe-skill"><img src="https://agentmods.dev/badge/skills/lambdatest/agent-skills/testcafe-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 6 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 73 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 88 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 89 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 90 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 91 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 92 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00043 | $0.00670 |
| Opus 5 | $0.00022 | $0.00335 |
| Sonnet 5 | $0.00009 | $0.00134 |
| Haiku 4.5 | $0.00004 | $0.00067 |
Grade A, and why
testcafe-skill 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 8d 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 — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TestCafe Automation Skill
Core Patterns
Basic Test
import { Selector } from 'testcafe';
fixture('Login').page('https://example.com/login');
test('Login with valid credentials', async t => {
await t
.typeText('#username', '[email protected]')
.typeText('#password', 'password123')
.click('button[type="submit"]')
.expect(Selector('.dashboard').exists).ok();
});
Selectors
const submitBtn = Selector('button').withText('Submit');
const listItems = Selector('.item').count;
const nthItem = Selector('.item').nth(2);
const filtered = Selector('.item').withAttribute('data-status', 'active');
Page Model
import { Selector, t } from 'testcafe';
class LoginPage {
constructor() {
this.usernameInput = Selector('#username');
this.passwordInput = Selector('#password');
this.submitButton = Selector('button[type="submit"]');
}
async login(username, password) {
await t
.typeText(this.usernameInput, username)
.typeText(this.passwordInput, password)
.click(this.submitButton);
}
}
export default new LoginPage();
TestMu AI Cloud
See reference/cloud-integration.md for full cloud setup and shared/testmu-cloud-reference.md for capabilities.
export LT_USERNAME=your_username
export LT_ACCESS_KEY=your_key
npx testcafe "lambdatest:Chrome@latest:Windows 11" tests/
Anti-Patterns
| Bad | Good | Why |
|---|---|---|
await t.wait(5000) |
Smart assertions with timeout | Arbitrary delays |
| Deep CSS selectors | Selector().withText() |
Fragile |
| No error screenshots | t.takeScreenshot() on failure |
Missing debug info |
Quick Reference
| Task | Command |
|---|---|
| Run all | npx testcafe chrome tests/ |
| Run headless | npx testcafe chrome:headless tests/ |
| Run specific | npx testcafe chrome tests/login.js |
| Multiple browsers | npx testcafe chrome,firefox tests/ |
| Live mode | npx testcafe chrome tests/ --live |
| Screenshot | await t.takeScreenshot() |
| Resize | await t.resizeWindow(1280, 720) |
What ships with it
3 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.
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.
- 8d ago First seen · 100 lines · 43 tokens per session scan A cdc7340f6166
testcafe-skill is a skill published in the GitHub repository LambdaTest/agent-skills (367 stars, last pushed today), licensed MIT. It adds 43 tokens to every session and 670 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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webapp-testing
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create-verification-skill
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browser-qa
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test-electron-app
Drive the real running PostHog Electron app (live tRPC, workspace-server, real data) over CDP with agent-browser. Connect to the running app on port 9222, test desktop changes against a local Django stack, snapshot the accessibility tree, inspect network requests, and screenshot only when explicitly asked. Use when…