What is webapp-testing?

A toolkit for using Playwright, a browser automation tool, to test local web applications.

Checking web functionality, debugging user-interface behavior, taking browser screenshots, and viewing browser logs.

It helps identify broken frontend behavior and understand what happens in the browser during a test.

webapp-testing — Skill for Claude Code and Codex by ammosu

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 ammosu/awesome-claude-skills-zh-TW --skill webapp-testing

Clone the repo

git clone --depth 1 https://github.com/ammosu/awesome-claude-skills-zh-TW

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin webapp-testing — /plugin install webapp-testing after adding the marketplace above.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ammosu/awesome-claude-skills-zh-tw/webapp-testing/github.svg)](https://agentmods.dev/skills/ammosu/awesome-claude-skills-zh-tw/webapp-testing)

Your own site

<a href="https://agentmods.dev/skills/ammosu/awesome-claude-skills-zh-tw/webapp-testing"><img src="https://agentmods.dev/badge/skills/ammosu/awesome-claude-skills-zh-tw/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/ammosu/awesome-claude-skills-zh-tw/webapp-testing"><img src="https://agentmods.dev/badge/skills/ammosu/awesome-claude-skills-zh-tw/webapp-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 884 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 unknown No closer match found 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.

Model	Per session	Once invoked
Fable 5.1	$0.00035	$0.00884
Opus 5.5	$0.00014	$0.00354
Sonnet 5.5	$0.00007	$0.00177
Haiku 4.5	$0.00003	$0.00088

Measured 2mo ago against content hash 51b7349e77ec, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo ago.

The scan reads SKILL.md. This mod also ships 4 executable files (examples/console_logging.py, examples/element_discovery.py, examples/static_html_automation.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.

webapp-testing/SKILL.md · 96 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

6 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.

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.

2mo ago First seen · 96 lines · 35 tokens per session scan A 51b7349e77ec

Subscribe to this mod's changes

webapp-testing is a skill published in the GitHub repository ammosu/awesome-claude-skills-zh-TW (30 stars, last pushed 10mo ago), with no licence file. It adds 35 tokens to every session and 884 once invoked, about $0.0001 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 2026-08-30.

Browser automation E2E testing Testing

webapp-testing next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
webapp-testingammosu/awesome-claude-skills-zh-TW	Skill	30	10mo ago	none	A	35	Claude Code, Codex
browsegarrytan/gstack	Skill	140k	yesterday	MIT	B	32	Claude Code
cua-driverdavidondrej/skills	Skill	4.3k	3d ago	MIT	A	68	Claude Code, Codex
create-verification-skillget-bb/bb	Skill	4.9k	yesterday	MIT	A	57	Claude Code, Codex
browser-qahashgraph-online/awesome-codex-plugins	Skill	1.5k	yesterday	Apache-2.0	A	58	Claude Code, Codex
webapp-testinganthropics/skills	Skill	188k	9d ago	none	A	35	Claude Code
test-electron-appPostHog/posthog-foss	Skill	728	yesterday	MIT	A	112	Claude Code