webapp-testing

webapp-testing is a skill for Claude Code from VoDaiLocz/kilo-kit-mcp. It costs 20 tokens per session (925 once invoked), scanned A, a copy of webapp-testing, Apache-2.0.

A guide to testing web applications in a browser, including route discovery, end-to-end checks, screenshots, and accessibility checks.

In plain words
What is it for?
Use it to map routes and endpoints, run Playwright browser tests, check critical flows, capture screenshots, and inspect accessibility.
Why use it?
It helps find untested pages, APIs, and user journeys before they cause problems for users.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to map routes and endpoints, run Playwright browser tests, check critical flows, capture screenshots, and inspect accessibility.

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Install with agentmods
npx agentmods add skills/vodailocz/kilo-kit-mcp/webapp-testing
Install

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.

Any agent
npx skills add VoDaiLocz/kilo-kit-mcp --skill webapp-testing
Clone the repo
git clone --depth 1 https://github.com/VoDaiLocz/kilo-kit-mcp

Made for: Claude Code.

Wrote 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.

agentmods badge for webapp-testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/vodailocz/kilo-kit-mcp/webapp-testing/github.svg)](https://agentmods.dev/skills/vodailocz/kilo-kit-mcp/webapp-testing)
Your own site
<a href="https://agentmods.dev/skills/vodailocz/kilo-kit-mcp/webapp-testing"><img src="https://agentmods.dev/badge/skills/vodailocz/kilo-kit-mcp/webapp-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.

agentmods 80×15 button for webapp-testing

Your own site · 80×15
<a href="https://agentmods.dev/skills/vodailocz/kilo-kit-mcp/webapp-testing"><img src="https://agentmods.dev/badge/skills/vodailocz/kilo-kit-mcp/webapp-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 925 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 88% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00020 $0.00925
Opus 5 $0.00010 $0.00463
Sonnet 5 $0.00004 $0.00185
Haiku 4.5 $0.00002 $0.00093

Measured 5d ago against content hash aa05117912ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

webapp-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 5d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/playwright_runner.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

88% identical to webapp-testing — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/engineering/webapp-testing/SKILL.md · 188 lines

How it starts

The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Web App Testing

Discover and test everything. Leave no route untested.

🔧 Runtime Scripts

Execute these for automated browser testing:

Script Purpose Usage
scripts/playwright_runner.py Basic browser test python scripts/playwright_runner.py https://example.com
With screenshot python scripts/playwright_runner.py <url> --screenshot
Accessibility check python scripts/playwright_runner.py <url> --a11y

Requires: pip install playwright && playwright install chromium


1. Deep Audit Approach

Discovery First

Target How to Find
Routes Scan app/, pages/, router files
API endpoints Grep for HTTP methods
Components Find component directories
Features Read documentation

Systematic Testing

  1. Map - List all routes/APIs
  2. Scan - Verify they respond
  3. Test - Cover critical paths

2. Testing Pyramid for Web

        /\          E2E (Few)
       /  \         Critical user flows
      /----\
     /      \       Integration (Some)
    /--------\      API, data flow
   /          \
  /------------\    Component (Many)
                    Individual UI pieces

3. E2E Test Principles

What to Test

Priority Tests
1 Happy path user flows
2 Authentication flows
3 Critical business actions
4 Error handling

E2E Best Practices

Practice Why
Use data-testid Stable selectors
Wait for elements Avoid flaky tests
Clean state Independent tests
Avoid implementation details Test user behavior

4. Playwright Principles

Core Concepts

Concept Use
Page Object Model Encapsulate page logic
Fixtures Reusable test setup
Assertions Built-in auto-wait
Trace Viewer Debug failures

Configuration

Setting Recommendation
Retries 2 on CI
Trace on-first-retry
Screenshots on-failure
Video retain-on-failure

Read the full file on GitHub · 188 lines

Files

What ships with it

1 file 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.

Changes

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.

  1. 5d ago First seen · 188 lines · 20 tokens per session scan A aa05117912ef

Subscribe to this mod's changes

webapp-testing is a skill published in the GitHub repository VoDaiLocz/kilo-kit-mcp (26 stars, last pushed yesterday), licensed Apache-2.0. It adds 20 tokens to every session and 925 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 88% identical to webapp-testing, differing in 2 lines, and is treated as a copy.

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