Scrollback gives each post three labels. They do different jobs, so it helps to keep them separate.
Category: the subject
A post has one category. It decides which topic card the post appears under on the home page. Keep the list short, five to eight is plenty. Posts without a category still work, they just don’t get a topic card.
Post type: the format
The post type is the kind of post, such as a quick note or a long guide. It shows as a coloured badge on cards and on the post itself. The colours are set in astro-paper.config.ts.
Tags: the detail
Tags are free-form and can be as specific as you like. They power the tag pages and help search. A post can have as many as it needs.
Using tags for topics instead
If you would rather build the topic cards from tags, change one line in astro-paper.config.ts:
topics: {
source: "tags",
}With lots of tags the home page gets busy, so use minPosts to hide topics that only have one post.