Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/jnPiyush/AgentXnpx agentmods add skills/jnpiyush/agentx/e2e-testingWrote 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/jnpiyush/agentx/e2e-testing)<a href="https://agentmods.dev/skills/jnpiyush/agentx/e2e-testing"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/e2e-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/jnpiyush/agentx/e2e-testing"><img src="https://agentmods.dev/badge/skills/jnpiyush/agentx/e2e-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 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 253 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 254 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 | $0.00049 | $0.02375 |
| Opus 5.5 | $0.00020 | $0.00950 |
| Sonnet 5.5 | $0.00010 | $0.00475 |
| Haiku 4.5 | $0.00005 | $0.00237 |
Grade A, and why
e2e-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 1mo 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 — 302 lines — stays where its author put it; the contents beside it link to each section on GitHub.
End-to-End Testing
Purpose: Validate complete user workflows from UI through backend to database and back. Scope: Browser automation, user journey testing, cross-browser, visual regression, accessibility.
When to Use This Skill
- Validating user-facing workflows end-to-end
- Building browser automation test suites
- Cross-browser and cross-device testing
- Visual regression testing for UI changes
- Smoke testing after deployments
- Accessibility compliance validation (WCAG 2.1 AA)
When NOT to Use
- Testing isolated business logic (use unit tests)
- Testing API contract compliance only (use integration testing)
- Load testing under concurrent users (use performance testing)
- Security vulnerability scanning (use security testing)
Prerequisites
- Application deployed to a test environment
- Test user accounts and credentials configured
- Browser automation framework installed
- Test data seeded or factories available
Decision Tree
What e2e scenario are you testing?
+- User login/auth flow?
| -> Auth E2E (session, tokens, MFA, SSO)
+- Form submission / data entry?
| -> Form E2E (validation, submission, confirmation)
+- Multi-step workflow (checkout, wizard)?
| -> Workflow E2E (state transitions, progress, completion)
+- Search / filter / pagination?
| -> Data E2E (results, sorting, edge cases, empty states)
+- File upload / download?
| -> File E2E (size limits, formats, progress, errors)
+- Real-time updates (WebSocket, SSE)?
| -> Real-time E2E (connection, updates, reconnect)
+- Cross-browser compatibility?
| -> Matrix E2E (Chrome, Firefox, Safari, Edge, mobile)
+- Visual appearance?
| -> Visual regression (screenshot comparison, responsive)
Framework Selection
| Framework | Best For | Language | Speed | Reliability |
|---|---|---|---|---|
| Playwright | Modern web apps, cross-browser | TS/JS/Python/C#/Java | Fast | High |
| Cypress | Single-domain SPAs, dev experience | JS/TS | Medium | High |
| Selenium | Legacy apps, wide browser support | Any | Slow | Medium |
| Puppeteer | Chrome-only, PDF/screenshot | JS/TS | Fast | High |
| TestCafe | No WebDriver needed, simple setup | JS/TS | Medium | Medium |
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.
- 1mo ago Changed e484a5759c8f
- 1mo ago First seen · 302 lines · 49 tokens per session scan A 8abcee8c09ff
e2e-testing is a skill published in the GitHub repository jnPiyush/AgentX (16 stars, last pushed 3d ago), licensed Apache-2.0. It adds 49 tokens to every session and 2,375 once invoked, about $0.0002 per session on Opus 5.5. 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.
Other skills, from other repositories
browse
Drive a real browser through Aside: open a page, read it, click through a flow, take screenshots, check console errors. (gstack).
cua-driver
Use Cua Driver for desktop or browser tasks that are awkward or unavailable through Bash/APIs, or when the user explicitly wants GUI interaction: app testing, visual bug reproduction, form filling, calendar entry, screenshots, and demo recording. Also covers Cua setup; not OpenAI Codex Computer Use or web research.
create-verification-skill
Create a repo-local verification skill and exhaustive feature map for driving a real app through its UI, CLI, or API. Use for "create a verification skill", "make a verify skill for this repo", or "document how agents can verify this app".
webapp-testing
Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.
browser-qa
A browser-based quality check for deployed web pages and user flows. It uses browser automation to test rendering, navigation, forms, interactions, responsive behaviour, and accessibility-related issues.
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…