What is playwright-skill?

A support package for browser automation using Playwright, a tool that controls web browsers from code.

Use it as an internal fallback to detect development servers, run Node.js browser scripts, capture screenshots, wait for single-page apps, and add HTTP headers.

It provides shared runtime helpers when another browser-automation skill needs Playwright, avoiding repeated setup for servers, scripts, screenshots, and page readiness.

playwright-skill — Skill for Claude Code and Codex by alexei-led

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 alexei-led/cc-thingz --skill playwright-skill

Clone the repo

git clone --depth 1 https://github.com/alexei-led/cc-thingz

Made for: Claude Code, Codex.

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/alexei-led/cc-thingz/playwright-skill.svg)](https://agentmods.dev/skills/alexei-led/cc-thingz/playwright-skill)

Your own site

<a href="https://agentmods.dev/skills/alexei-led/cc-thingz/playwright-skill"><img src="https://agentmods.dev/badge/skills/alexei-led/cc-thingz/playwright-skill.svg" alt="Measured on agentmods" height="20"></a>

Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,159 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original 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	$0.00059	$0.01159
Opus 5	$0.00030	$0.00580
Sonnet 5	$0.00012	$0.00232
Haiku 4.5	$0.00006	$0.00116

Measured 8d ago against content hash 7703a782dd6a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

playwright-skill 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 8d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (scripts/lib/helpers.js, scripts/lib/runtime.js, scripts/lib/screenshot.js, …), 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.

src/skills/playwright-skill/SKILL.md · 144 lines

How it starts

The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Playwright Support Runtime

Support-only helper for browser-automation. Provides Playwright primitives: dev-server detection, a script runner (scripts/run.js), screenshot CLIs, and helper utilities (scripts/lib/helpers.js).

Do not treat this as the user-facing browser skill. Load it only when browser-automation chooses the bundled Playwright helper as the runtime/reference.

Critical workflow

Run from this skill directory — the directory containing this SKILL.md. If the loaded skill path is different from ~/.pi/agent/skills, use that loaded path.
Detect dev servers first for localhost testing:
```
node scripts/run.js --json "console.log(JSON.stringify(await helpers.detectDevServers()))"
```
One server → use it. Multiple → ask which. None → ask for a URL.
Use /tmp/playwright-* for generated scripts and artifacts unless the user asked for permanent tests. Never write generated scripts or artifacts into scripts/, the skill directory, or the user's project.
Prefer headless screenshots in Pi/headless harnesses. Use headed mode only when the platform exposes a usable visible browser.
Parameterize target URLs at the top of generated scripts as TARGET_URL.

Running scripts

node scripts/run.js --quiet /tmp/playwright-test-<name>.js
node scripts/run.js --json "console.log(JSON.stringify({ ok: !!chromium }))"

run.js preserves the caller working directory, auto-wraps code for await, auto-installs Playwright on first run using bun with npm fallback, and sends runner logs to stderr. Script stdout stays clean for JSON.

chromium, firefox, webkit, devices, helpers, and getContextOptionsWithHeaders(opts) are exposed as globals for all scripts. Scripts may still use normal imports such as require("fs"), require("path"), or require("playwright").

Turnkey screenshots

For one page:

node scripts/screenshot-url.js \
  --url http://localhost:3030/1?clicks=20 \
  --selector .slidev-page \
  --out /tmp/playwright-slide-01.png \
  --manifest /tmp/playwright-slide-01.json \
  --json

Read the full file on GitHub · 144 lines

Files

What ships with it

12 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.

8d ago First seen · 144 lines · 59 tokens per session scan A 7703a782dd6a

Subscribe to this mod's changes

playwright-skill is a skill published in the GitHub repository alexei-led/cc-thingz (35 stars, last pushed 1mo ago), licensed MIT. It adds 59 tokens to every session and 1,159 once invoked, about $0.0003 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 2026-08-30.

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