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 hainamchung/agent-assistant --skill go-playwrightgit clone --depth 1 https://github.com/hainamchung/agent-assistantWrote 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/hainamchung/agent-assistant/go-playwright)<a href="https://agentmods.dev/skills/hainamchung/agent-assistant/go-playwright"><img src="https://agentmods.dev/badge/skills/hainamchung/agent-assistant/go-playwright/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/hainamchung/agent-assistant/go-playwright"><img src="https://agentmods.dev/badge/skills/hainamchung/agent-assistant/go-playwright.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 | $0.00021 | $0.01102 |
| Opus 5 | $0.00010 | $0.00551 |
| Sonnet 5 | $0.00004 | $0.00220 |
| Haiku 4.5 | $0.00002 | $0.00110 |
Grade A, and why
go-playwright 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.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- go-playwright — 92% identical, 1 lines differ
How it starts
The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Playwright Go Automation Expert
Overview
This skill provides a comprehensive framework for writing high-performance, production-grade browser automation scripts using github.com/playwright-community/playwright-go. It enforces architectural best practices (contexts over instances), robust error handling, structured logging (Zap), and advanced human-emulation techniques to bypass anti-bot systems.
When to Use This Skill
- Use when the user asks to "scrape," "automate," or "test" a website using Go.
- Use when the target site has complex dynamic content (SPA, React, Vue) requiring a real browser.
- Use when the user mentions "stealth," "avoiding detection," "cloudflare," or "human-like" behavior.
- Use when debugging existing Playwright scripts.
Safety & Risk
Risk Level: 🔵 Safe
- Sandboxed Execution: Browser contexts are isolated; they do not persist data to the host machine unless explicitly saved.
- Resource Management: Designed to close browsers and contexts via
deferto prevent memory leaks. - No External State-Change: Default behavior is read-only (scraping/testing) unless the script is explicitly designed to submit forms or modify data.
Limitations
- Environment Dependencies: Requires Playwright drivers and browsers to be installed (
go run github.com/playwright-community/playwright-go/cmd/playwright@latest install --with-deps). - Resource Intensity: Launching full browser instances (even headless) consumes significant RAM/CPU. Use single-browser/multi-context architecture.
- Bot Detection: While this skill includes stealth techniques, extremely strict anti-bot systems (e.g., rigorous Cloudflare settings) may still detect automation.
- CAPTCHAs: Does not include built-in CAPTCHA solving capabilities.
Strategic Implementation Guidelines
1. Architecture: Contexts vs. Browsers
CRITICAL: Never launch a new Browser instance for every task.
- Pattern: Launch the
Browseronce (singleton). Create a newBrowserContextfor each distinct session or task. - Why: Contexts are lightweight and created in milliseconds. Browsers take seconds to launch.
- Isolation: Contexts provide complete isolation (cookies, cache, storage) without the overhead of a new process.
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.
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 · 77 lines · 21 tokens per session scan A 69b1d776c49b
go-playwright is a skill published in the GitHub repository hainamchung/agent-assistant (54 stars, last pushed 3mo ago), licensed MIT. It adds 21 tokens to every session and 1,102 once invoked, about $0.0001 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 2026-09-03.
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