This makes it look as if the site consists mostly of editable plain text. Accordingly, the user interface has been simplified and there are no links to the preview, add, diff and upload actions and the corresponding templates have been deleted. There is no special static or feed template (mostly because the feed would depend on the list of links that isn't rendered).
Now, the text is still saved in Markdown files and the Markdown is still rendered to HTML – but the "view" template just prints the page body inside a "pre" block and ignores the rendered HTML.
In addition to that, a piece of JavaScript goes through the text and replaces rocket links with actual links. Rocket links are how Gemini links to other pages: On a line by itself (no inline links!) write "=>", a space, the URL, and optionally another space and the text to use.