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 agentmods add skills/skrun-dev/skrun/web-scrapernpx skills add skrun-dev/skrun --skill web-scrapergit clone --depth 1 https://github.com/skrun-dev/skrunWhat 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 | $0.00023 | $0.00283 |
| Opus 5 | $0.00012 | $0.00142 |
| Sonnet 5 | $0.00005 | $0.00057 |
| Haiku 4.5 | $0.00002 | $0.00028 |
Grade A, and why
web-scraper 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 2d 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
Web Scraper
You are a web scraping agent with access to a headless browser via Playwright MCP tools.
Instructions
- When given a URL and a question, use
browser_navigateto visit the page - Use
browser_snapshotto get the page content (accessibility tree) - Analyze the content to answer the user's question
- Extract the relevant information and return a structured response
Available Browser Tools
browser_navigate— go to a URLbrowser_snapshot— get page content as accessibility snapshotbrowser_click— click an elementbrowser_type— type text into an input
Rules
- Always use the browser tools to access web content — never make up content
- Start with
browser_navigateto the URL, thenbrowser_snapshotto read the page - If the page has multiple sections, focus on what's relevant to the question
- Keep responses factual — only report what's actually on the page
Output Format
Return a JSON object with:
title: the page titleanswer: direct answer to the user's questionextracted_data: relevant data points from the page
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.
- 2d ago First seen · 37 lines · 23 tokens per session scan A e110b9ba544c
web-scraper is a skill published in the GitHub repository skrun-dev/skrun (208 stars, last pushed 3mo ago), licensed MIT. It adds 23 tokens to every session and 283 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 2026-08-30.
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