diff --git a/CHANGES.md b/CHANGES.md
index f523381..f1a24d3 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -18,3 +18,15 @@
 -->
 # PHOENIX Changelog
 
+## Release thirdparty-1.0.0 - Unreleased (as of 2020-10-14)
+
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [PHOENIX-6039](https://issues.apache.org/jira/browse/PHOENIX-6039) | Create phoenix-thirdparty main project, and add phoenix-shaded-guava as a subproject |  Major | thirdparty |
+| [PHOENIX-6038](https://issues.apache.org/jira/browse/PHOENIX-6038) | Create phoenix-thirdparty git repo |  Major | thirdparty |
+
+
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 6e96b11..97b33cf 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -16,3 +16,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 -->
+# PHOENIX  thirdparty-1.0.0 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
+
+
+