Is it possible to allow for cards to be linked?
For example, when a feature becomes a saga and therefore the card generates its own "board" (perhaps in a different organisation—if the feature is being "outsourced") such that the smaller components of the feature appear on that.
Best Answer
Note: This answer has been updated due to changes in Trello. Legacy information still available at the end.
The answer
You can link to other cards in any board. Just paste the link to the card into the text...
and Trello will convert it to a nice-looking link with an icon and the card title.
When you open a card the address bar changes to a direct-link to that card, so you can copy it from there. This does mean that you have to navigate to the other card in order to get the link. The old way allowed you to start typing '#' and then choose from a list or type the number. However, it does mean that you can link to cards on other boards.
The old way
See Trello support for explanation of feature deprecation: moving between boards changes card number.
Yes, you can! All you have to do is type
#xx
wherexx
is the card number - as far as I know you can do this anywhere that you input text - I have tested it in descriptions and comments.For example you might have something like this in a card description:
The
#xx
will appear as a link to the referenced card.Note that the card reference is working only in the same board, it is not cross-board
Response from Trello (2016-01-27)
When the old behaviour changed I filed a bug report with Trello and got this back: