codingheader/myskills/21pounder-web-scrape

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Intelligent web scraper with content extraction, multiple output formats, and error handling

Install

npx vskill@latest install codingheader/myskills/21pounder-web-scrape

SKILL.md

Web Scraping Skill v3.0

Usage

/web-scrape <url> [options]

Options:

  • --format=markdown|json|text - Output format (default: markdown)
  • --full - Include full page content (skip smart extraction)
  • --screenshot - Also save a screenshot
  • --scroll - Scroll to load dynamic content (infinite scroll pages)

Examples:

/web-scrape https://example.com/article
/web-scrape https://news.site.com/story --format=json
/web-scrape https://spa-app.com/page --scroll --screenshot

Execution Flow

Phase 1: Navigate and Load
1. mcp__playwright__browser_navigate
url: "<target URL>"
2. mcp__playwright__browser_wait_for
time: 2 (allow initial render)

If `--scroll` option: Execute scroll sequence to trigger lazy loading:

3. mcp__playwright__browser_evaluate
function: "async () => {
for (let i = 0; i < 3; i++) {
window.scrollTo(0, document.body.scrollHeight);
await new Promise(r => setTimeout(r, 1000));
}
window.scrollTo(0, 0);
}"
Phase 2: Capture Content
4. mcp__playwright__browser_snapshot
→ Returns full accessibility tree with all text content

If `--screenshot` option:

5. mcp__playwright__browser_take_screenshot
filename: "scraped_<domain>_<timestamp>.png"
fullPage: true
Phase 3: Close Browser
6. mcp__playwright__browser_close

Smart Content Extraction

After getting the snapshot, apply intelligent extraction:

Step 1: Identify Content Type
Page TypeIndicatorsExtraction Strategy
Article/Blog<article>, long paragraphs, date/authorExtract main article body
Product PagePrice, "Add to Cart", specsExtract title, price, description, specs
DocumentationCode blocks, headings hierarchyPreserve structure and code
List/SearchRepeated item patternsExtract as structured list
Landing PageHero section, CTAsExtract key messaging
Step 2: Filter Noise

ALWAYS REMOVE these elements from output:

  • Navigation menus and breadcrumbs
  • Footer content (copyright, links)
  • Sidebars (ads, related articles, social links)
  • Cookie banners and popups
  • Comments section (unless specifically requested)
  • Share buttons and social widgets
  • Login/signup prompts
Step 3: Structure the Content

For Articles:

markdown
# [Title]
**Source:** [URL]
**Date:** [if available]
**Author:** [if available]
---
[Main content in clean markdown]

For Product Pages:

markdown
# [Product Name]
**Price:** [price]
**Availability:** [in stock/out of stock]
## Description
[product description]
## Specifications
| Spec | Value |
|------|-------|
| ... | ... |

Output Formats

Markdown (default)

Clean, readable markdown with proper headings, lists, and formatting.

JSON
json
{
"url": "https://...",
"title": "Page Title",
"type": "article|product|docs|list",
"content": {
"main": "...",
"metadata": {}
},
"extracted_at": "ISO timestamp"
}
Text

Plain text with minimal formatting, suitable for further processing.


Error Handling

Navigation Errors
ErrorDetectionAction
TimeoutPage doesn't load in 30sReport error, suggest retry
404 Not Found"404" in title/contentReport "Page not found"
403 Forbidden"403", "Access Denied"Report access restriction
CAPTCHA"captcha", "verify you're human"Report CAPTCHA detected, cannot proceed
Paywall"subscribe", "premium content"Extract visible content, note paywall
Recovery Actions
If page load fails:
1. Report the specific error to user
2. Suggest: "Try again?" or "Different URL?"
3. Close browser cleanly
If content is blocked:
1. Report what was detected (CAPTCHA/paywall/geo-block)
2. Extract any available preview content
3. Suggest alternatives if applicable

Advanced Scenarios

Single Page Applications (SPA)
1. Navigate to URL
2. Wait longer (3-5 seconds) for JS hydration
3. Use browser_wait_for with specific text if known
4. Then snapshot
Infinite Scroll Pages
1. Navigate
2. Execute scroll loop (see Phase 1)
3. Snapshot after scrolling completes
Pages with Click-to-Reveal Content
1. Snapshot first to identify clickable elements
2. Use browser_click on "Read more" / "Show all" buttons
3. Wait briefly
4. Snapshot again for full content
Multi-page Articles
1. Scrape first page
2. Identify "Next" or pagination links
3. Ask user: "Article has X pages. Scrape all?"
4. If yes, iterate through pages and combine

Performance Guidelines

MetricTargetHow
Speed< 15 secondsMinimal waits, parallel where possible
Token Usage< 5000 tokensSmart extraction, not full DOM
Reliability> 95% successProper error handling

Security Notes

  • Never execute arbitrary JavaScript from the page
  • Don't follow redirects to suspicious domains
  • Don't submit forms or click login buttons
  • Don't scrape pages that require authentication (unless user provides credentials flow)
  • Respect robots.txt when mentioned by user

Quick Reference

Minimum viable scrape (4 tool calls):

1. browser_navigate → 2. browser_wait_for → 3. browser_snapshot → 4. browser_close

Full-featured scrape (with scroll + screenshot):

1. browser_navigate
2. browser_wait_for
3. browser_evaluate (scroll)
4. browser_snapshot
5. browser_take_screenshot
6. browser_close

Remember: The goal is to deliver clean, useful content to the user, not raw HTML/DOM dumps.

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

Quality evaluation

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