Card Mirroring

Butler allows basic card mirroring: make the actions on one card automatically provoke changes on another card.

This is typically done on cards that are copies of each other, perhaps living in different boards.

For example, we can create a linked copy of a card upon some event:

when I am added to a card,
copy the card to list "Inbox" on board "Personal" and link the cards together

Then, we can mirror certain changes in one of the cards to the other:

when a card is moved to list "Done",
find the first card linked in the attachments,
and move the card to the bottom of list "Completed This Week"
when the due date is marked as complete on a card by anyone,
find the first card linked in the attachments,
and mark the due date as complete
and post comment "{username} completed this task"
Please, note that trying to keep two cards perfectly synchronized with Butler is not a good idea, as it would require to set up a large amount of rules.

If you need full card synchronization between boards, there are specific solutions in the Trello marketplace for this purpose. These are made by other companies, but if you e-mail us we'll be happy to point you to some.

Butler also allows you to propagate changes to multiple cards:

when the due date is marked as complete on a card by anyone,
for each card linked in the attachments,
mark the due date as complete and post comment "{username} completed this task"

The links can also be stored in checklist items:

when a card is moved to list "Start Project" by anyone,
for each card linked from an item in checklist "Sub-tasks",
move the card to list "In Progress"