To include a template in this category, add [[Category:Non-subject-matter-related article-talk header templates]]
to the <includeonly> section at the bottom of the template's /doc subpage if such a page exists. Otherwise, add <noinclude>[[Category:Non-subject-matter-related article-talk header templates]]</noinclude>
to the end of the template code, making sure it starts on the same line as the last character of the code.
Most templates in Category:Article talk header templates are intended for a collection of pages that are similar in their subject-matter. This category is for those that do not fit that pattern, e.g. pages with a problem that can apply to virtually any subject, or that are part of project whose focus is not subject-matter based.