kpsul/kfet/cms/hooks.py

from django.contrib.staticfiles.templatetags.staticfiles import static
from django.utils.html import format_html
from wagtail.wagtailcore import hooks


@hooks.register("insert_editor_css")
def editor_css():
    return format_html(
        '<link rel="stylesheet" href="{}">', static("kfetcms/css/editor.css")
    )