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 ivegamsft/basecoat --skill e2e-testinggit clone --depth 1 https://github.com/ivegamsft/basecoatWrote 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/ivegamsft/basecoat/e2e-testing)<a href="https://agentmods.dev/skills/ivegamsft/basecoat/e2e-testing"><img src="https://agentmods.dev/badge/skills/ivegamsft/basecoat/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/ivegamsft/basecoat/e2e-testing"><img src="https://agentmods.dev/badge/skills/ivegamsft/basecoat/e2e-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00088 | $0.00463 |
| Opus 5 | $0.00044 | $0.00231 |
| Sonnet 5 | $0.00018 | $0.00093 |
| Haiku 4.5 | $0.00009 | $0.00046 |
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 today.
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.
What it actually says
E2E Testing Skill
Design reliable, maintainable end-to-end coverage for critical user journeys. Choose the right framework, define resilient selectors and waits, and connect browser tests to CI pipelines without creating brittle suites.
See also: E2E Validation Lifecycle diagrams for visual guidance on gate preconditions, pass/fail branching, and test scope decisions.
Reference Files
| File | Contents |
|---|---|
references/playwright-patterns.md |
Setup, test structure, waits, fixtures, mocking, accessibility, performance |
references/cypress-patterns.md |
Cypress config, test patterns, custom commands |
references/ci-integration.md |
CI matrix, flakiness prevention, test data management |
Framework Decision (Quick Reference)
| Criterion | Playwright | Cypress |
|---|---|---|
| Browser support | Chromium, Firefox, WebKit | Chromium, Firefox, Electron |
| Language | JS/TS, Python, Java, C# | JS/TS only |
| Parallel execution | Native, multi-process | Paid (Cypress Cloud) |
| Best for | Cross-browser, multi-language | JS-first teams, quick setup |
See references/ci-integration.md for core principles, CI matrix patterns, and flakiness prevention.
What ships with it
4 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.
- today First seen · 41 lines · 88 tokens per session scan A f1e4462b4c24
e2e-testing is a skill published in the GitHub repository ivegamsft/basecoat (4 stars, last pushed yesterday), licensed MIT. It adds 88 tokens to every session and 463 once invoked, about $0.0004 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 2026-09-08.
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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.
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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…