This module lets users specify which of the group chats they are in are less important. This influences when mod_csi_simple decides to send stanzas vs waiting until there is more to send. Users in many large public channels might benefit from this.


The module is configured via ad-hoc an command called Configure group chat priorities that should appear in the menus of compatible clients.

The command presents a form that accepts a list of XMPP addresses. Currently there is a single priority, Lower priority, which is suitable for e.g. noisy public channels. mod_csi_simple considers groupchat messages important by default on the assumptions that smaller and more important private chats are more common among most users.

A message of type groupchat from an address in this list will not be considered important enough to send it to an inactive client, unless it is from the current user or mentions of their nickname. Note that mention support require the separate module mod_track_muc_joins to also be loaded.

modules_enabled = {
    -- other modules etc

    "track_muc_joins", -- optional


With the plugin installer in Prosody 0.12 you can use:

sudo prosodyctl install --server= mod_csi_muc_priorities

For other see the documentation for installing 3rd party modules