Your repository is just the storage. The Codespace is where youβll actually edit, build, and preview: a full development environment that runs entirely in your browser, with every PreTeXt dependency already installed.
A new tab opens and begins the setup. This is the 5-to-10-minute wait from the introduction. Get a cup of coffee. Youβll know itβs done when the progress messages stop and you see a layout with a file explorer on the left and a welcome file in the center.
First-time setup really does take several minutes, and some of those minutes look silent. Give it at least ten before worrying. If after fifteen minutes there is still no file explorer, close the tab, return to your repository, click < > Code, then Codespaces, and click your existing codespace to resume rather than creating a new one.