Requested feature overview description.
Tags that indicate which model(s) were used in the creation of a work (such as "stable_diffusion") should be meta-tags.
Why would it be useful?
General tags are used to indicate what content can be found in the image itself. Meta-tags are used to indicate things about the image (resolution, year produced, etc). As the model(s) used in the creation of a work are not usually represented within the image itself, the tags referencing them should be moved to the meta-tag category.
What part(s) of the site page(s) are affected?
Tag lists on individual image pages and the upload page that offers lists of recommended tags and meta-tags.