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+==============================
+Migration from Pylons to Flask
+==============================
+
+On CKAN 2.6, work started to migrate from the Pylons web framework to a more
+modern alternative, `Flask `_. This will be a gradual
+process spanning multiple CKAN versions, where both the Pylons app and the
+Flask app will live side by side with their own controllers or blueprints
+which handle the incoming requests. The idea is that any other lower level code,
+like templates, logic actions and authorization are shared between them as much
+as possible. You can learn more about the approach followed and the work
+already done on this page in the CKAN wiki:
+
+https://github.com/ckan/ckan/wiki/Migration-from-Pylons-to-Flask
+
+This page lists changes and deprecations that both core and extensions
+developers should be aware of going forward, as well as common exceptions and
+how to fix them.
+
+-----------------------------------------------------------------------
+Always import methods and objects from the plugins toolkit if available
+-----------------------------------------------------------------------
+
+This is a :ref:`good practice in general