Dev tooling is opt-in per site. Add to wp-config.php:
define('PAYMENTFORM_DEV', true);With it set, the plugin honours frontend/.env (APP_API_BASE_URL, APP_APP_BASE_URL) and serves the admin SPA from the Vite dev server while pnpm dev is running. Without it, both are ignored and the plugin always uses the production hosts and the built assets/.
bin/package.sh [output.zip] builds the WordPress.org zip (default build/paymentform-<Stable tag>.zip): built assets, PHP, production vendor/ and third-party licenses. The readable frontend source stays in this repo, which readme.txt links for WordPress.org review.