Playwright is a framework for automating and testing websites through one API that drives Chromium, Firefox, and WebKit. Developers use it for end-to-end tests, browser automation scripts, and AI-agent web interactions. The catalogue add-ons help coding and AI agents use Playwright for testing and browser automation.
Borrowing it
Nothing to install: this file belongs to microsoft/playwright. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/microsoft/playwright/main/.claude/skills/playwright-dev/SKILL.mdgit clone --depth 1 https://github.com/microsoft/playwrightWrote 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/microsoft/playwright/playwright-dev)<a href="https://agentmods.dev/skills/microsoft/playwright/playwright-dev"><img src="https://agentmods.dev/badge/skills/microsoft/playwright/playwright-dev/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/microsoft/playwright/playwright-dev"><img src="https://agentmods.dev/badge/skills/microsoft/playwright/playwright-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00025 | $0.00310 |
| Opus 5.5 | $0.00010 | $0.00124 |
| Sonnet 5.5 | $0.00005 | $0.00062 |
| Haiku 4.5 | $0.00003 | $0.00031 |
Grade A, and why
playwright-dev 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 16d 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.
What it actually says
Playwright Development Guide
See AGENTS.md for monorepo structure, build/test/lint commands, and coding conventions.
Detailed Guides
- Library Architecture — client/server/dispatcher structure, protocol layer, DEPS rules
- Adding and Modifying APIs — define API docs, implement client/server, add tests
- MCP Tools and CLI Commands — add MCP tools, CLI commands, config options
- Vendor Dependencies & Bundling — utilsBundle, coreBundle, babelBundle; adding vendored npm packages; DEPS.list;
check_deps - Updating WebKit Safari Version — update the Safari version string in the WebKit user-agent
- WebView (iOS Safari) Backend —
webkit/webview/against stock Mobile Safari; provisional-target pause/resume; what's upstream vs Playwright patches; local + CI test setup - Bisecting Across Published Versions — reproduce regressions side-by-side from npm and diff
node_modules/playwright/lib/between versions - Dashboard - the UI powering the "playwright cli show" command, and how to work on it
What ships with it
9 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.
- 16d ago Changed c6c92182f15a
- 1mo ago First seen · 20 lines · 25 tokens per session scan A 6771c8148b53
playwright-dev is a skill published in the GitHub repository microsoft/playwright (98,318 stars, last pushed today), licensed Apache-2.0. It adds 25 tokens to every session and 310 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.
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