I'm trying to create a plugin which is accessible from the sidebar navigation in courses (Participants / Competencies / Grades / etc). I've created a block plugin and followed the instructions on the moodle dev site to add nav items. However, what the docs call "navigation" is really "breadcrumbs." Also, my plugin's code isn't even executed on the course page. If I add an error_log(), it's output on the site config pages, but not on the course pages.
Should I be creating a different kind of plugin? Is there any way to do this?
Thanks!