GA4 Report CLI

ga is a self-contained CLI that reads GA4 property traffic through the Analytics Data API and prints a Korean summary — totals, a per-interval table (daily / weekly / monthly), a top-10 acquisition-channel breakdown, and a top-10 page list. An `all` mode sweeps several properties at once and ranks sites by average DAU, rendering a table on the terminal and a mobile-friendly vertical block for messaging apps. It ships with no dependencies: JWTs are signed with Node's built-in crypto, so the skill directory is fully portable — copy it and it runs. Authentication is dual-mode and auto-detected: a service-account key (signed locally into an access token) takes priority, and if no key file is present it falls back to gcloud Application Default Credentials, so a new machine can authenticate with the user's own Google account without distributing any secret. The gcloud binary is discovered across PATH, Homebrew Cask, and standard install paths so it keeps working inside non-interactive shells (cron, LaunchAgent). To reuse it, you bring your own inputs: pass your own numeric GA4 property ID (or register your domains in the alias map) and authenticate with your own account holding viewer access — the bundled aliases and service account point at SH Consulting's own sites and are only the demo fixtures. Built originally to power daily automated traffic briefings, it works equally well as an ad-hoc reporting command.