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 majiayu000/spellbook --skill playwright-automationgit clone --depth 1 https://github.com/majiayu000/spellbookWrote 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/majiayu000/spellbook/playwright-automation)<a href="https://agentmods.dev/skills/majiayu000/spellbook/playwright-automation"><img src="https://agentmods.dev/badge/skills/majiayu000/spellbook/playwright-automation/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/majiayu000/spellbook/playwright-automation"><img src="https://agentmods.dev/badge/skills/majiayu000/spellbook/playwright-automation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00032 | $0.00263 |
| Opus 5.5 | $0.00013 | $0.00105 |
| Sonnet 5.5 | $0.00006 | $0.00053 |
| Haiku 4.5 | $0.00003 | $0.00026 |
Grade A, and why
playwright-automation 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 1mo 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 Browser Automation
Use this skill for Playwright scripts that inspect pages, capture screenshots, automate forms, test responsive views, or collect console/network evidence.
Routing
- Start here to confirm scope, safety boundaries, and the minimum workflow.
- Load
references/full-guide.mdbefore executing detailed commands, applying templates, or relying on examples from this skill. - Keep the work limited to the user-requested target; do not add adjacent improvements unless the user asks.
Quick Workflow
- Confirm the target, available context, constraints, and done-when signal.
- Read the relevant section of
references/full-guide.mdfor task-specific details. - Execute the smallest reversible action that satisfies the request.
- Verify with a runnable script, explicit target URL, captured output or artifact path, and cleanup of any started local servers.
- Report changed files, commands run, evidence collected, and any remaining risk.
References
references/full-guide.md- complete command patterns, examples, checklists, and edge cases.
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.
- 1mo ago First seen · 28 lines · 32 tokens per session scan A d14cc4113eb7
playwright-automation is a skill published in the GitHub repository majiayu000/spellbook (288 stars, last pushed 3d ago), licensed MIT. It adds 32 tokens to every session and 263 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 2026-09-03.
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