diff --git a/picard/extension_points/cover_art_providers.py b/picard/extension_points/cover_art_providers.py
new file mode 100644
index 000000000..5ea0e611e
--- /dev/null
+++ b/picard/extension_points/cover_art_providers.py
@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2014-2015, 2018-2021, 2023-2024 Laurent Monin
+# Copyright (C) 2015 Rahul Raturi
+# Copyright (C) 2016 Ville Skyttä
+# Copyright (C) 2016 Wieland Hoffmann
+# Copyright (C) 2017 Sambhav Kothari
+# Copyright (C) 2019-2021 Philipp Wolfer
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+from picard.extension_points.options_pages import register_options_page
+from picard.plugin import ExtensionPoint
+
+
+ext_point_cover_art_providers = ExtensionPoint(label='cover_art_providers')
+
+
+def register_cover_art_provider(provider):
+    ext_point_cover_art_providers.register(provider.__module__, provider)
+    if hasattr(provider, 'OPTIONS') and provider.OPTIONS:
+        if not hasattr(provider.OPTIONS, 'NAME'):
+            provider.OPTIONS.NAME = provider.name.lower().replace(' ', '_')
+        if not hasattr(provider.OPTIONS, 'TITLE'):
+            provider.OPTIONS.TITLE = provider.title
+        register_options_page(provider.OPTIONS)
diff --git a/picard/extension_points/formats.py b/picard/extension_points/formats.py
new file mode 100644
index 000000000..97e8aa6fc
--- /dev/null
+++ b/picard/extension_points/formats.py
@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2006-2008, 2012 Lukáš Lalinský
+# Copyright (C) 2008 Will
+# Copyright (C) 2010, 2014, 2018-2020, 2023 Philipp Wolfer
+# Copyright (C) 2013 Michael Wiencek
+# Copyright (C) 2013, 2017-2024 Laurent Monin
+# Copyright (C) 2016-2018 Sambhav Kothari
+# Copyright (C) 2017 Sophist-UK
+# Copyright (C) 2017 Ville Skyttä
+# Copyright (C) 2020 Gabriel Ferreira
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+from picard.plugin import ExtensionPoint
+
+
+ext_point_formats = ExtensionPoint(label='formats')
+formats_extensions = {}
+
+
+def register_format(file_format):
+    ext_point_formats.register(file_format.__module__, file_format)
+    for ext in file_format.EXTENSIONS:
+        formats_extensions[ext[1:]] = file_format
diff --git a/picard/extension_points/item_actions.py b/picard/extension_points/item_actions.py
new file mode 100644
index 000000000..977d8e71a
--- /dev/null
+++ b/picard/extension_points/item_actions.py
@@ -0,0 +1,94 @@
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2006-2008, 2011-2012 Lukáš Lalinský
+# Copyright (C) 2007 Robert Kaye
+# Copyright (C) 2008 Gary van der Merwe
+# Copyright (C) 2008 Hendrik van Antwerpen
+# Copyright (C) 2008-2011, 2014-2015, 2018-2024 Philipp Wolfer
+# Copyright (C) 2009 Carlin Mangar
+# Copyright (C) 2009 Nikolai Prokoschenko
+# Copyright (C) 2011 Tim Blechmann
+# Copyright (C) 2011-2012 Chad Wilson
+# Copyright (C) 2011-2013 Michael Wiencek
+# Copyright (C) 2012 Your Name
+# Copyright (C) 2012-2013 Wieland Hoffmann
+# Copyright (C) 2013-2014, 2016, 2018-2024 Laurent Monin
+# Copyright (C) 2013-2014, 2017, 2020 Sophist-UK
+# Copyright (C) 2016 Rahul Raturi
+# Copyright (C) 2016 Simon Legner
+# Copyright (C) 2016 Suhas
+# Copyright (C) 2016-2017 Sambhav Kothari
+# Copyright (C) 2018 Vishal Choudhary
+# Copyright (C) 2020-2021 Gabriel Ferreira
+# Copyright (C) 2021 Bob Swift
+# Copyright (C) 2021 Louis Sautier
+# Copyright (C) 2021 Petit Minion
+# Copyright (C) 2023 certuna
+# Copyright (C) 2024 Suryansh Shakya
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+from PyQt6 import (
+    QtCore,
+    QtGui,
+)
+
+from picard.plugin import ExtensionPoint
+
+
+class BaseAction(QtGui.QAction):
+    NAME = "Unknown"
+    MENU = []
+
+    def __init__(self):
+        super().__init__(self.NAME, None)
+        self.tagger = QtCore.QCoreApplication.instance()
+        self.triggered.connect(self.__callback)
+
+    def __callback(self):
+        objs = self.tagger.window.selected_objects
+        self.callback(objs)
+
+    def callback(self, objs):
+        raise NotImplementedError
+
+
+ext_point_album_actions = ExtensionPoint(label='album_actions')
+ext_point_cluster_actions = ExtensionPoint(label='cluster_actions')
+ext_point_clusterlist_actions = ExtensionPoint(label='clusterlist_actions')
+ext_point_file_actions = ExtensionPoint(label='file_actions')
+ext_point_track_actions = ExtensionPoint(label='track_actions')
+
+
+def register_album_action(action):
+    ext_point_album_actions.register(action.__module__, action)
+
+
+def register_cluster_action(action):
+    ext_point_cluster_actions.register(action.__module__, action)
+
+
+def register_clusterlist_action(action):
+    ext_point_clusterlist_actions.register(action.__module__, action)
+
+
+def register_file_action(action):
+    ext_point_file_actions.register(action.__module__, action)
+
+
+def register_track_action(action):
+    ext_point_track_actions.register(action.__module__, action)
diff --git a/picard/extension_points/options_pages.py b/picard/extension_points/options_pages.py
new file mode 100644
index 000000000..f1231c0a2
--- /dev/null
+++ b/picard/extension_points/options_pages.py
@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2006-2007 Lukáš Lalinský
+# Copyright (C) 2009 Nikolai Prokoschenko
+# Copyright (C) 2009, 2019-2022 Philipp Wolfer
+# Copyright (C) 2013, 2015, 2018-2024 Laurent Monin
+# Copyright (C) 2016-2017 Sambhav Kothari
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+from picard.plugin import ExtensionPoint
+
+
+ext_point_options_pages = ExtensionPoint(label='options_pages')
+
+
+def register_options_page(page_class):
+    ext_point_options_pages.register(page_class.__module__, page_class)
diff --git a/picard/extension_points/ui_init.py b/picard/extension_points/ui_init.py
new file mode 100644
index 000000000..ae0d89ce2
--- /dev/null
+++ b/picard/extension_points/ui_init.py
@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+#
+# Picard, the next-generation MusicBrainz tagger
+#
+# Copyright (C) 2006-2008, 2011-2012, 2014 Lukáš Lalinský
+# Copyright (C) 2007 Nikolai Prokoschenko
+# Copyright (C) 2008 Gary van der Merwe
+# Copyright (C) 2008 Robert Kaye
+# Copyright (C) 2008 Will
+# Copyright (C) 2008-2010, 2015, 2018-2023 Philipp Wolfer
+# Copyright (C) 2009 Carlin Mangar
+# Copyright (C) 2009 David Hilton
+# Copyright (C) 2011-2012 Chad Wilson
+# Copyright (C) 2011-2013, 2015-2017 Wieland Hoffmann
+# Copyright (C) 2011-2014 Michael Wiencek
+# Copyright (C) 2013-2014, 2017 Sophist-UK
+# Copyright (C) 2013-2024 Laurent Monin
+# Copyright (C) 2015 Ohm Patel
+# Copyright (C) 2015 samithaj
+# Copyright (C) 2016 Rahul Raturi
+# Copyright (C) 2016 Simon Legner
+# Copyright (C) 2016-2017 Sambhav Kothari
+# Copyright (C) 2017 Antonio Larrosa
+# Copyright (C) 2017 Frederik “Freso” S. Olesen
+# Copyright (C) 2018 Kartik Ohri
+# Copyright (C) 2018 Vishal Choudhary
+# Copyright (C) 2018 virusMac
+# Copyright (C) 2018, 2021-2023 Bob Swift
+# Copyright (C) 2019 Timur Enikeev
+# Copyright (C) 2020-2021 Gabriel Ferreira
+# Copyright (C) 2021 Petit Minion
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+from picard.plugin import ExtensionPoint
+
+
+ext_point_ui_init = ExtensionPoint(label='ui_init')
+
+
+def register_ui_init(function):
+    ext_point_ui_init.register(function.__module__, function)
+