Implement XEP-0313: Message Archive Management (MAM)
Submitted by Steven Roose
Assigned to Telepathy bugs list
It is a common desire for a user using XMPP for IM to want to store their messages in a central archive on their server. This feature allows them to record conversations that take place on clients that do not support local history storage, and also to synchronise their conversation history seamlessly between multiple clients.
Implementing new XEP's on Telepathy does improve a lot of clients that depend on it. The developers of those are all dependent on Telepathy changes...