Chromium DevTools Helpers
Overview
Use the bundled TypeScript CLI to drive Chromium through the Chrome DevTools Protocol. Prefer this when quick, local, single-purpose browser actions are needed and a full browser automation server is overkill.
Quick Start
Run from the skill directory so relative paths resolve:
bash
cd /Users/douglas/.claude/skills/chrome-dev-protocol # 1) Launch Chromium with remote debugging enabled npx tsx scripts/browser-tools.ts start --port 9222 # 2) Navigate the active tab npx tsx scripts/browser-tools.ts nav https://example.com --port 9222 # 3) Run JS in the active tab npx tsx scripts/browser-tools.ts eval 'document.title' --port 9222 # 4) Capture a viewport screenshot (prints temp path) npx tsx scripts/browser-tools.ts screenshot --port 9222
Core Commands
- •
start: Launch Chromium with a DevTools port.- •Defaults to
/Applications/Chromium.app/Contents/MacOS/Chromium. - •Use
--chromium-path <path>for a custom Chromium binary (inferred name used for logs). - •Use
--profile <name>to copy a specific Chromium profile (e.g.,Default,Profile 2) and pass--profile-directoryto skip the profile switcher. - •Fresh tabs are enabled by default; pass
--no-fresh-tabsto keep restored tabs.
- •Defaults to
- •
nav <url>: Navigate the current tab; use--newto force a new tab. If no normal page tab exists yet, it opens a new tab first. Falls back to a new tab if current-tab navigation fails in Chromium. Use--timeout <seconds>if the page is slow. - •
eval <code...>: Evaluate JavaScript in the active tab. Use--pretty-printfor structured output. - •
screenshot: Capture the current viewport; prints the temp PNG path. - •
pick <message...>: Interactive DOM picker to collect metadata about clicked elements. - •
console: Stream or snapshot console logs. Use--followto tail. - •
search <query...>: Google search with optional readable content extraction (--content). - •
content <url>: Extract readable text content from a URL. - •
cookies: Dump cookies from the active tab as JSON. - •
inspect: List DevTools-enabled Chromium processes and open tabs. - •
kill: Terminate DevTools-enabled Chromium processes.
Chromium Notes
- •The default profile copy uses
~/Library/Application Support/Chromium/on macOS. - •If the script cannot find a running tab, open one in Chromium before running
nav,eval,screenshot, etc.
Resources
scripts/
- •
scripts/browser-tools.ts: CLI for Chromium DevTools automation (adapted from steipete/agent-scripts).