OpenFreeEnergy · atravitz · Mar 26, 2026 · Nov 5, 2025 · Mar 20, 2026 · Mar 23, 2026
diff --git a/docs/CHANGELOG.rst b/docs/CHANGELOG.rst
@@ -4,6 +4,25 @@ CHANGELOG
 
 .. current developments
 
+
+v1.9.0
+====================
+
+**Added:**
+
+* Added a how-to guide for defining a custom ``Component`` (`PR #667 <https://github.com/OpenFreeEnergy/gufe/pull/667>`_).
+* Added a ``.validate()`` method to gufe Components (`PR #732 <https://github.com/OpenFreeEnergy/gufe/pull/732>`_).
+* ``gufe.protocol.protocoldag.execute_DAG`` now has the ability to resume DAG execution by passing in a path for results caching into ``cache_basedir`` (`PR #738 <https://github.com/OpenFreeEnergy/gufe/pull/738>`_).
+* Added two new Components, a ``SolvatedPDBComponent`` for explicitly solvated systems, including periodic box vectors, and a ``ProteinMembraneComponent`` that inherits from ``SolvatedPDBComponent`` and can be used downstream for type checking of solvated protein membrane appropriate settings (`PR #635 <https://github.com/OpenFreeEnergy/gufe/pull/635>`_).
+* Added a ``ComponentValidationError`` type to be used specifically when ``Component.validate()``  fails (`PR #766 <https://github.com/OpenFreeEnergy/gufe/pull/766>`_).
+
+**Changed:**
+
+* Sped up the counting of the number of water molecules in a SolvatedPDBComponent (`PR #751 <https://github.com/OpenFreeEnergy/gufe/pull/751>`_).
+* ``amber/lipid17_merged.xml`` is now defined by default in forcefield list in :class:`OpenMMSystemGeneratorFFSettings` (`PR #767 <https://github.com/OpenFreeEnergy/gufe/pull/767>`_).
+
+
+
 v1.8.0
 ====================
 

diff --git a/news/add_component_howto.rst b/news/add_component_howto.rst
diff --git a/news/component_errors.rst b/news/component_errors.rst
diff --git a/news/component_validate.rst b/news/component_validate.rst
diff --git a/news/lipids-ff.rst b/news/lipids-ff.rst
diff --git a/news/resuming.rst b/news/resuming.rst
diff --git a/news/solvatedpdbcomponent.rst b/news/solvatedpdbcomponent.rst
diff --git a/news/speedup_tests_solpdbc.rst b/news/speedup_tests_solpdbc.rst