CompactChat is a mod which will clean up your minecraft chat.
If a message is sent twice, the previous message will be removed, and the newer one will have the number of occurrences appended to it.
By default, CompactChat will automatically set your chat history's length to be infinite. This can be disabled via a config screen which can be opened with ModMenu.
Get the latest download from the releases page.
CompactChat uses the MIT license