This extension provides a custom dataset form for inventory.data.gov, tailored to managing metadata meeting the DCAT-US Schema (Project Open Data). It includes a React-based metadata application built with Vite, server-side validation, publisher management with hierarchical structure support, and CLI commands for importing publishers. The extension supports end-to-end testing with Cypress and is available on PyPI. Developed by GSA (General Services Administration) for the US federal government data inventory system.