Facebook Marketplace Runtime Setup

Every other skill in this library assumes browser-harness is installed, attached to the user's signed-in Chrome, and reachable on the host. This skill is the one-stop install + attach + verify flow. Run it whenever a marketplace-scout skill complains that the browser-harness daemon isn't alive, Chrome isn't reachable, or Facebook session is missing.

This skill does NOT touch Marketplace data or send any messages. It only sets up the runtime.

When to Use

Use this skill when:

• browser-harness --doctor reports chrome FAIL or daemon FAIL.
• browser-harness is not installed at all (command -v browser-harness returns nothing).
• A marketplace-scout skill bailed early with a message like "browser-harness is not attached" or "Chrome is not reachable."
• The user signed out of Facebook in their Chrome and the session needs to be restored before running buyer/seller workflows.

Don't Use When

• browser-harness --doctor already reports chrome running AND daemon alive. Runtime is healthy; skip.
• The user is on a non-Chrome / non-Chromium browser. The library does not currently support Firefox or Safari.
• The user wants to run a marketplace skill against a headless cloud browser. That requires the Browser Use Cloud configuration (BROWSER_USE_API_KEY); refer them to the upstream browser-harness docs instead of running this skill.