trello-card-numbers

Trello assigns every card a short number, but only shows it once you have opened the card. That makes it awkward to refer to a card in standup or a commit message without digging for it.

trello-card-numbers is a very small Power-Up that puts the number back on the front of the card, as a badge, where you can read it from the board view. It installs as a manifest URL - no server, no OAuth, just a static manifest.json served from Github Pages.

Javascript, Trello Power-Ups

Source & install instructions available on Github.