diff --git a/releng/download/releases/12.0/compositeArtifacts.xml b/releng/download/releases/12.0/compositeArtifacts.xml
new file mode 100644
index 00000000000..1f29b521c8a
--- /dev/null
+++ b/releng/download/releases/12.0/compositeArtifacts.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<?compositeArtifactRepository version='1.0.0'?>
+<repository name='CDT 12.0 Update Site'
+    type='org.eclipse.equinox.internal.p2.artifact.repository.CompositeArtifactRepository' version='1.0.0'>
+  <properties size='1'>
+    <!-- timestamp made with date +%s%3N -->
+    <property name='p2.timestamp' value='1741367840116'/>
+  </properties>
+  <children size='1'>
+    <child location='cdt-12.0.0'/>
+  </children>
+</repository>
diff --git a/releng/download/releases/12.0/compositeContent.xml b/releng/download/releases/12.0/compositeContent.xml
new file mode 100644
index 00000000000..82987c5a3af
--- /dev/null
+++ b/releng/download/releases/12.0/compositeContent.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<?compositeMetadataRepository version='1.0.0'?>
+<repository name='CDT 12.0 Update Site'
+    type='org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepository' version='1.0.0'>
+  <properties size='1'>
+    <!-- timestamp made with date +%s%3N -->
+    <property name='p2.timestamp' value='1741367840116'/>
+  </properties>
+  <children size='1'>
+    <child location='cdt-12.0.0'/>
+  </children>
+</repository>
diff --git a/releng/download/releases/cdt-lsp-3.0/compositeArtifacts.xml b/releng/download/releases/cdt-lsp-3.0/compositeArtifacts.xml
new file mode 100644
index 00000000000..3e067b03366
--- /dev/null
+++ b/releng/download/releases/cdt-lsp-3.0/compositeArtifacts.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<?compositeArtifactRepository version='1.0.0'?>
+<repository name='CDT LSP 3.0 Update Site'
+    type='org.eclipse.equinox.internal.p2.artifact.repository.CompositeArtifactRepository' version='1.0.0'>
+  <properties size='1'>
+    <!-- timestamp made with date +%s%3N -->
+    <property name='p2.timestamp' value='1741367840116'/>
+  </properties>
+  <children size='1'>
+    <child location='cdt-lsp-3.0.0'/>
+  </children>
+</repository>
diff --git a/releng/download/releases/cdt-lsp-3.0/compositeContent.xml b/releng/download/releases/cdt-lsp-3.0/compositeContent.xml
new file mode 100644
index 00000000000..d784dad63af
--- /dev/null
+++ b/releng/download/releases/cdt-lsp-3.0/compositeContent.xml
@@ -0,0 +1,12 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<?compositeMetadataRepository version='1.0.0'?>
+<repository name='CDT LSP 3.0 Update Site'
+    type='org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepository' version='1.0.0'>
+  <properties size='1'>
+    <!-- timestamp made with date +%s%3N -->
+    <property name='p2.timestamp' value='1741367840116'/>
+  </properties>
+  <children size='1'>
+    <child location='cdt-lsp-3.0.0'/>
+  </children>
+</repository>
diff --git a/releng/scripts/promote-files-to-download.sh b/releng/scripts/promote-files-to-download.sh
index ef1a88cfbff..19ced3405c7 100755
--- a/releng/scripts/promote-files-to-download.sh
+++ b/releng/scripts/promote-files-to-download.sh
@@ -28,12 +28,14 @@ $ECHO $SCP ./releng/download/releases/11.3/* "${SSHUSER}:${DOWNLOAD}/releases/11
 $ECHO $SCP ./releng/download/releases/11.4/* "${SSHUSER}:${DOWNLOAD}/releases/11.4/"
 $ECHO $SCP ./releng/download/releases/11.5/* "${SSHUSER}:${DOWNLOAD}/releases/11.5/"
 $ECHO $SCP ./releng/download/releases/11.6/* "${SSHUSER}:${DOWNLOAD}/releases/11.6/"
+$ECHO $SCP ./releng/download/releases/12.0/* "${SSHUSER}:${DOWNLOAD}/releases/12.0/"
 
 $ECHO $SSH mkdir -p "${DOWNLOAD}/releases/cdt-lsp-latest/"
 $ECHO $SCP ./releng/download/releases/cdt-lsp-latest/* "${SSHUSER}:${DOWNLOAD}/releases/cdt-lsp-latest/"
 $ECHO $SCP ./releng/download/releases/cdt-lsp-1.0/* "${SSHUSER}:${DOWNLOAD}/releases/cdt-lsp-1.0/"
 $ECHO $SCP ./releng/download/releases/cdt-lsp-1.1/* "${SSHUSER}:${DOWNLOAD}/releases/cdt-lsp-1.1/"
 $ECHO $SCP ./releng/download/releases/cdt-lsp-2.0/* "${SSHUSER}:${DOWNLOAD}/releases/cdt-lsp-2.0/"
+$ECHO $SCP ./releng/download/releases/cdt-lsp-3.0/* "${SSHUSER}:${DOWNLOAD}/releases/cdt-lsp-3.0/"
 
 # Issue #235 - some of the old archived releases had bad composites. For those
 # ones we started maintaining the files here as it was the easiest way to edit