release: Version 0.4.0 "Profligate Pixie"0.4.0

1 files changed, 14 insertions, 0 deletions

diff --git a/docs/advanced/api.rst b/docs/advanced/api.rst
index 61f6d01..f5e0e47 100644
--- a/docs/advanced/api.rst
+++ b/docs/advanced/api.rst
@@ -12,3 +12,17 @@ Versioning
 **hircine** uses `Semantic Versioning <https://semver.org>`_. The *public API*
 consists of both the frontend (command-line interface and web application) and
 the backend (GraphQL API and plugin infrastructure).
+
+Breaking changes
+----------------
+
+.. _api-breaking-0.4.0:
+
+0.4.0
+^^^^^
+
+- With the addition of filtering on association counts in
+  :commit:`9c460c6db7e6a4e7f8ed3e8d93032c7ef070efee`, the old ``empty`` field on
+  ``AssociationFilter`` is now obsolete. Instead use the ``count`` field and
+  match on a ``value`` of ``0`` with the ``EQUAL`` operator (which is the
+  default).