shepherdjerred/monorepo/lightpanda-browser

Claude Code and agent skill by shepherdjerred/monorepo

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Lightpanda headless browser CLI for fast web content extraction, searching, and fetching When browsing the web, fetching URLs, searching the web, extracting web page content, or needing rendered HTML from a URL

Install

npx vskill@latest install shepherdjerred/monorepo/lightpanda-browser

SKILL.md

Lightpanda Browser

Overview

Lightpanda is an open-source headless browser built from scratch in Zig for machine/AI usage. It executes JavaScript, renders the DOM, and can emit Markdown or a semantic tree directly. Use it via CLI shell commands for fast content extraction.

Status: Beta. Works for most sites. Complex JS-heavy SPAs may fail -- fall back to Playwright for those.

Installation

On macOS, Lightpanda is installed persistently by the chezmoi-managed Homebrew bundle:

bash
brew install lightpanda-io/browser/lightpanda

Use the bare lightpanda command. Current flags use hyphens, such as --strip-mode and --log-level.

Ideal Command for AI Content Extraction

bash
lightpanda fetch --dump markdown --strip-mode clutter --log-level fatal <url>
  • --dump markdown converts the rendered document to Markdown
  • --strip-mode clutter removes scripts, stylesheets, and non-content clutter (reader mode)
  • --log-level fatal keeps routine logs out of stderr

CLI Reference

Commands
CommandPurpose
fetchFetch a URL, execute JS, dump rendered HTML
serveStart a CDP server (for Playwright/Puppeteer)
helpShow usage
versionShow version
Fetch Options
FlagDescription
--dump <mode>Output html, markdown, or a semantic tree
--strip-mode <modes>Tag group to remove: clutter, css, js, invisible, shell, ui (can be repeated)
--with-baseAdd <base> tag to output

Strip modes:

  • clutter -- heuristic to keep only main content (recommended for AI)
  • js -- remove script tags and preload links
  • css -- remove style tags and stylesheet links
  • ui -- remove img, picture, video, css, svg
  • shell -- remove page chrome (nav, aside, dialog, header, footer)
  • invisible -- remove hidden elements (display:none, template)
Common Options (fetch and serve)
FlagDefaultDescription
--obey-robotsfalseRespect robots.txt
--http-proxy <url>noneHTTP proxy (supports user:pass@host:port)
--proxy-bearer-token <token>noneBearer auth for proxy
--http-timeout <ms>10000Transfer timeout (0 = no timeout)
--http-connect-timeout <ms>0Connection timeout (0 = no timeout)
--http-max-concurrent <n>40Max concurrent HTTP requests
--http-max-response-size <bytes>1 GiBLimit response size
--log-level <level>warndebug/info/warn/error/fatal
--log-format <fmt>logfmtpretty/logfmt
--user-agent-suffix <str>noneAppended to the Lightpanda user agent
Environment Variables
VariableDescription
LIGHTPANDA_DISABLE_TELEMETRY=trueDisable usage telemetry

Common Patterns

Fetch a page (clean content)
bash
lightpanda fetch --dump markdown --strip-mode clutter --log-level fatal https://example.com
Fetch with extended timeout (slow sites)
bash
lightpanda fetch --dump markdown --strip-mode clutter --log-level fatal --http-timeout 15000 https://example.com
Fetch respecting robots.txt
bash
lightpanda fetch --dump markdown --strip-mode clutter --log-level fatal --obey-robots https://example.com
Fetch with base tag (for resolving relative URLs)
bash
lightpanda fetch --dump markdown --strip-mode clutter --log-level fatal --with-base https://example.com

Output Behavior

  • stdout: The format selected by --dump after JavaScript execution
  • stderr: Log messages
  • --log-level fatal suppresses routine logs without hiding real command errors

When to Fall Back to Playwright

Use Playwright instead of lightpanda when you need:

  • Interactive page manipulation (clicking buttons, filling forms)
  • Multi-step navigation with session/cookie state
  • Screenshots or visual testing
  • Complex JS-heavy SPAs that lightpanda fails to render
  • Waiting for specific elements or network conditions

Security

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

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Source

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