diff --git a/changelog.md b/changelog.md
index bfe34b1..12a958e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,2 +1,4 @@
 - default base docker image set to CALDP_drizcosstis_CAL_rc2
 - default crds update to hst_1063.pmap
+- significant refactoring to generalize processing terms and support
+  HAP processing workflows