diff --git a/include/ircd/m/user.h b/include/ircd/m/user.h
index ed62aa6ae..bbeb47690 100644
--- a/include/ircd/m/user.h
+++ b/include/ircd/m/user.h
@@ -34,3 +34,4 @@ namespace ircd::m
 #include "user/filter.h"
 #include "user/ignores.h"
 #include "user/highlight.h"
+#include "user/breadcrumb_rooms.h"
diff --git a/include/ircd/m/user/breadcrumb_rooms.h b/include/ircd/m/user/breadcrumb_rooms.h
new file mode 100644
index 000000000..e1d32b707
--- /dev/null
+++ b/include/ircd/m/user/breadcrumb_rooms.h
@@ -0,0 +1,36 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+#pragma once
+#define HAVE_IRCD_M_USER_BREADCRUMB_ROOMS_H
+
+struct ircd::m::user::breadcrumb_rooms
+{
+	using closure = std::function<void (const string_view &)>;
+	using closure_bool = std::function<bool (const string_view &)>;
+	using sort_closure = std::function<bool (const string_view &, const string_view &)>;
+
+	m::user::account_data account_data;
+
+  public:
+	bool get(std::nothrow_t, const closure &) const;
+	void get(const closure &) const;
+
+	bool for_each(const closure_bool &) const;
+
+	event::id::buf set(const json::array &value) const;
+	event::id::buf sort(const sort_closure &) const;
+	event::id::buf add(const string_view &) const;
+	event::id::buf del(const string_view &) const;
+
+	breadcrumb_rooms(const m::user &user)
+	:account_data{user}
+	{}
+};
diff --git a/include/ircd/m/user/user.h b/include/ircd/m/user/user.h
index 72b56b98b..4bfe31fdf 100644
--- a/include/ircd/m/user/user.h
+++ b/include/ircd/m/user/user.h
@@ -24,6 +24,7 @@ struct ircd::m::user
 	struct filter;
 	struct ignores;
 	struct highlight;
+	struct breadcrumb_rooms;
 
 	using id = m::id::user;
 	using closure = std::function<void (const user &)>;
diff --git a/modules/console.cc b/modules/console.cc
index ffd328edd..57242a61b 100644
--- a/modules/console.cc
+++ b/modules/console.cc
@@ -10852,6 +10852,34 @@ console_cmd__user__ignores(opt &out, const string_view &line)
 	return true;
 }
 
+bool
+console_cmd__user__breadcrumb_rooms(opt &out, const string_view &line)
+{
+	const params param{line, " ",
+	{
+		"user_id"
+	}};
+
+	const m::user::id &user_id
+	{
+		param.at("user_id")
+	};
+
+	const m::user::breadcrumb_rooms breadcrumb_rooms
+	{
+		user_id
+	};
+
+	breadcrumb_rooms.for_each([&out]
+	(const string_view &room_id)
+	{
+		out << room_id << std::endl;
+		return true;
+	});
+
+	return true;
+}
+
 //
 // users
 //
diff --git a/modules/m_user.cc b/modules/m_user.cc
index 796c4cc9e..5ab83ab95 100644
--- a/modules/m_user.cc
+++ b/modules/m_user.cc
@@ -44,6 +44,73 @@ user_create(const m::user::id &user_id,
 	return user;
 }
 
+///////////////////////////////////////////////////////////////////////////////
+//
+// m/user/breadcrumb_rooms.h
+//
+
+ircd::m::event::id::buf
+ircd::m::user::breadcrumb_rooms::set(const json::array &rooms)
+const
+{
+	const json::strung object
+	{
+		json::members
+		{
+			{ "rooms", rooms }
+		}
+	};
+
+	return account_data.set("im.vector.riot.breadcrumb_rooms", object);
+}
+
+bool
+ircd::m::user::breadcrumb_rooms::for_each(const closure_bool &closure)
+const
+{
+	bool ret{true};
+	get(std::nothrow, [&closure, &ret]
+	(const json::array &rooms)
+	{
+		for(const json::string &room : rooms)
+			if(!closure(room))
+			{
+				ret = false;
+				break;
+			}
+	});
+
+	return ret;
+}
+
+void
+ircd::m::user::breadcrumb_rooms::get(const closure &closure)
+const
+{
+	if(!get(std::nothrow, closure))
+		throw m::NOT_FOUND
+		{
+			"User has no breadcrumb_rooms set in their account_data."
+		};
+}
+
+bool
+ircd::m::user::breadcrumb_rooms::get(std::nothrow_t,
+                                     const closure &closure)
+const
+{
+	return account_data.get(std::nothrow, "im.vector.riot.breadcrumb_rooms", [&closure]
+	(const string_view &key, const json::object &object)
+	{
+		const json::array &rooms
+		{
+			object["rooms"]
+		};
+
+		closure(rooms);
+	});
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 //
 // m/user/highlight.h