diff --git a/.github/autolabeler.yml b/.github/autolabeler.yml
index 1573656333..ff7c72c70a 100644
--- a/.github/autolabeler.yml
+++ b/.github/autolabeler.yml
@@ -1,3 +1,11 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# license agreements; and to You under the Apache License, version 2.0:
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# This file is part of the Apache Pekko project, which was derived from Akka.
+#
+
 # configuration for https://github.com/probot/autolabeler
 
 dependency-change: "/project/Dependencies.scala"
diff --git a/.github/workflows/binary-compatibility-checks.yml b/.github/workflows/binary-compatibility-checks.yml
index 40637ce1d5..f857755171 100644
--- a/.github/workflows/binary-compatibility-checks.yml
+++ b/.github/workflows/binary-compatibility-checks.yml
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 name: Binary Compatibility
 
 on:
@@ -6,6 +23,7 @@ on:
     branches:
       - main
       - 1.0.x
+      - 1.1.x
 
 permissions: {}
 
diff --git a/.github/workflows/dependency-graph.yml b/.github/workflows/dependency-graph.yml
index c7c14feb36..ef9311188b 100644
--- a/.github/workflows/dependency-graph.yml
+++ b/.github/workflows/dependency-graph.yml
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 name: Update Dependency Graph
 on:
   push:
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 7c2a7eb64a..ff4dab71df 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 name: Scalafmt
 
 permissions: {}
diff --git a/.github/workflows/headers.yml b/.github/workflows/headers.yml
index eea36289e9..0243de47e7 100644
--- a/.github/workflows/headers.yml
+++ b/.github/workflows/headers.yml
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 name: Headers
 
 on:
diff --git a/.github/workflows/link-validator.yml b/.github/workflows/link-validator.yml
index 2a2a11cb25..e3b8c7e1f8 100644
--- a/.github/workflows/link-validator.yml
+++ b/.github/workflows/link-validator.yml
@@ -1,3 +1,11 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# license agreements; and to You under the Apache License, version 2.0:
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# This file is part of the Apache Pekko project, which was derived from Akka.
+#
+
 name: Link Validator
 
 permissions: {}
diff --git a/.github/workflows/nightly-1.0-builds.yml b/.github/workflows/nightly-1.0-builds.yml
index 2aa6d09e80..292902d5fc 100644
--- a/.github/workflows/nightly-1.0-builds.yml
+++ b/.github/workflows/nightly-1.0-builds.yml
@@ -1,3 +1,11 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# license agreements; and to You under the Apache License, version 2.0:
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# This file is part of the Apache Pekko project, which was derived from Akka.
+#
+
 name: Nightly Builds (1.0)
 
 on:
diff --git a/.github/workflows/nightly-builds-aeron.yml b/.github/workflows/nightly-builds-aeron.yml
index fd4a2a4743..1a17540381 100644
--- a/.github/workflows/nightly-builds-aeron.yml
+++ b/.github/workflows/nightly-builds-aeron.yml
@@ -1,3 +1,11 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# license agreements; and to You under the Apache License, version 2.0:
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# This file is part of the Apache Pekko project, which was derived from Akka.
+#
+
 name: Nightly Aeron Tests
 
 on:
diff --git a/.github/workflows/scala-steward.yml b/.github/workflows/scala-steward.yml
index 64ee65f7a8..b1978a17b4 100644
--- a/.github/workflows/scala-steward.yml
+++ b/.github/workflows/scala-steward.yml
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 on:
   workflow_dispatch:
   schedule:
diff --git a/.github/workflows/scala3-build.yml b/.github/workflows/scala3-build.yml
index bd0d3fc761..57c3eab13a 100644
--- a/.github/workflows/scala3-build.yml
+++ b/.github/workflows/scala3-build.yml
@@ -1,3 +1,20 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
 name: Build and test Pekko with Scala 3
 
 on:
diff --git a/.github/workflows/timing-tests.yml b/.github/workflows/timing-tests.yml
index 45ce33ef6c..216205921e 100644
--- a/.github/workflows/timing-tests.yml
+++ b/.github/workflows/timing-tests.yml
@@ -1,3 +1,11 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# license agreements; and to You under the Apache License, version 2.0:
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# This file is part of the Apache Pekko project, which was derived from Akka.
+#
+
 name: Timing sensitive tests
 
 on: