What it does.
Runs a pre-launch website audit (SEO, Open Graph, agent readiness, and related checks) against the files in front of the agent.
When to invoke it.
Invoke it when the agent should inspect a real repo. Use the browser picker when you want to scope workflows and copy a one-shot prompt.
Install it first.
Follow How to install portable skills, then the platform how-to for your host. Get the file from website-launch-checklist-prompt — never treat GitHub as the primary button.
Shop page versus browser tool.
Working tool: Launch Checklist Prompt — use it when you want to operate the UI yourself.
The shop page is Setup only.