diff --git a/.github/workflows/pre-commit-check.yml b/.github/workflows/pre-commit-check.yml
index 15c5280..0f55d20 100644
--- a/.github/workflows/pre-commit-check.yml
+++ b/.github/workflows/pre-commit-check.yml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 name: Lint Check (pre-commit)
 
 on:
diff --git a/.markdownlint.yaml b/.markdownlint.yaml
index 21c2849..4c6a7e8 100644
--- a/.markdownlint.yaml
+++ b/.markdownlint.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 # MD033/no-inline-html : Inline HTML : https://github.com/DavidAnson/markdownlint/blob/v0.35.0/doc/md033.md
 # Disable inline html linter is needed for <details> <summary>
 MD033: false
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index cbf059b..0eaf006 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
diff --git a/include/beman/cache_latest/cache_latest.hpp b/include/beman/cache_latest/cache_latest.hpp
index 4c87835..f6c517e 100644
--- a/include/beman/cache_latest/cache_latest.hpp
+++ b/include/beman/cache_latest/cache_latest.hpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 #ifndef BEMAN_CACHE_LATEST_H
 #define BEMAN_CACHE_LATEST_H
 
diff --git a/infra/.github/workflows/pre-commit.yml b/infra/.github/workflows/pre-commit.yml
index 9646831..e54a1ea 100644
--- a/infra/.github/workflows/pre-commit.yml
+++ b/infra/.github/workflows/pre-commit.yml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 name: Lint Check (pre-commit)
 
 on:
diff --git a/infra/.pre-commit-config.yaml b/infra/.pre-commit-config.yaml
index 8052e18..ac4607a 100644
--- a/infra/.pre-commit-config.yaml
+++ b/infra/.pre-commit-config.yaml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v6.0.0
diff --git a/infra/cmake/BuildTelemetry.cmake b/infra/cmake/BuildTelemetry.cmake
index c2ff343..a6e0219 100755
--- a/infra/cmake/BuildTelemetry.cmake
+++ b/infra/cmake/BuildTelemetry.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 include_guard(GLOBAL)
 
 include(${CMAKE_CURRENT_LIST_DIR}/BuildTelemetryConfig.cmake)
diff --git a/infra/cmake/BuildTelemetryConfig.cmake b/infra/cmake/BuildTelemetryConfig.cmake
index 15aae48..2e26d45 100755
--- a/infra/cmake/BuildTelemetryConfig.cmake
+++ b/infra/cmake/BuildTelemetryConfig.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 include_guard(GLOBAL)
 
 set(BUILD_TELEMETRY_DIR ${CMAKE_CURRENT_LIST_DIR})
diff --git a/infra/cmake/telemetry.sh b/infra/cmake/telemetry.sh
index 323982e..123324e 100755
--- a/infra/cmake/telemetry.sh
+++ b/infra/cmake/telemetry.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 set -o nounset
 set -o errexit
diff --git a/infra/cmake/use-fetch-content.cmake b/infra/cmake/use-fetch-content.cmake
index 73594be..b36e603 100644
--- a/infra/cmake/use-fetch-content.cmake
+++ b/infra/cmake/use-fetch-content.cmake
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 cmake_minimum_required(VERSION 3.24)
 
 include(FetchContent)
diff --git a/tests/beman/cache_latest/cache_latest.test.cpp b/tests/beman/cache_latest/cache_latest.test.cpp
index fc62e76..da45641 100644
--- a/tests/beman/cache_latest/cache_latest.test.cpp
+++ b/tests/beman/cache_latest/cache_latest.test.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
 #include <beman/cache_latest/cache_latest.hpp>
 #include <gtest/gtest.h>
 #include <ranges>