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+# Introduction
+
+This module adds an internal Prosody API to retrieve the last received message by MUC occupants.
+
+## Requirements
+
+The clients must support XEP-0333, and the users to be tracked must be affiliated with the room.
+
+Currently due to lack of clarity about which id to use in acknowledgements in XEP-0333, this module
+rewrites the id attribute of stanzas to match the stanza (archive) id assigned by the MUC server.
+
+Oh yeah, and mod_muc_mam is required (or another module that adds a stanza-id), otherwise this module
+won't do anything.
+
+# Configuring
+
+## Enabling
+
+``` {.lua}
+Component "rooms.example.net" "muc"
+modules_enabled = {
+    "muc_markers";
+    "muc_mam";
+}
+```
+
+## Settings
+
+There are no configuration options for this module.
+
+# Developers
+
+## Example usage
+
+```
+local muc_markers = module:depends("muc_markers");
+
+function something()
+	local last_received_id = muc_markers.get_user_read_marker("user@localhost", "room@conference.localhost");
+end
+```