I just implemented tag hints in the imdone card editor so you'll never forget how to tag a card in your project.
Special thanks to Alexander Makarov for this codemirror add-on. https://github.com/samdark/codemirror-autosuggest
For those of you who aren't familiar with imdone, it's a kanban board for indiehackers, freelancers and small teams who work in code, markdown and plain text. It's easy to use and 100% portable because the cards live in your text files.