diff --git a/.npmignore b/.npmignore
index 1d5be5b..1c2895f 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 src/
 tsconfig.json
 src/*.ts
diff --git a/README.md b/README.md
index 17e18ad..be4d9e6 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
+<!-- SPDX-License-Identifier: Apache-2.0 -->
+
 # Rule Command Line Interface Documentation
 
 * * *
diff --git a/src/cli.ts b/src/cli.ts
index 1c84bab..fe9ec78 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -1,4 +1,5 @@
-#!/usr/bin/env node
+// SPDX-License-Identifier: Apache-2.0
+
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import { program } from 'commander';
 import handleTemplating from './init/template';
diff --git a/src/common/loader.ts b/src/common/loader.ts
index c05c1c1..5fa6dbf 100644
--- a/src/common/loader.ts
+++ b/src/common/loader.ts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 const loadingIndicator = ['|', '/', '-', '\\'];
 let currentIndex = 0;
 
diff --git a/src/common/remove.ts b/src/common/remove.ts
index d4277b4..db11d19 100644
--- a/src/common/remove.ts
+++ b/src/common/remove.ts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import * as shell from 'shelljs';
 import * as path from 'path';
diff --git a/src/init/template.ts b/src/init/template.ts
index 5003a08..842aa45 100644
--- a/src/init/template.ts
+++ b/src/init/template.ts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import * as path from 'path';
 import * as prompts from 'prompts';
diff --git a/src/init/templates/non-returner-typescript/.github/workflows/publish.yml b/src/init/templates/non-returner-typescript/.github/workflows/publish.yml
index b38a94b..bcc93a6 100644
--- a/src/init/templates/non-returner-typescript/.github/workflows/publish.yml
+++ b/src/init/templates/non-returner-typescript/.github/workflows/publish.yml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 on:
   push:
     branches:
diff --git a/src/init/templates/non-returner-typescript/.npmignore b/src/init/templates/non-returner-typescript/.npmignore
index fd9d7b8..fe5e260 100644
--- a/src/init/templates/non-returner-typescript/.npmignore
+++ b/src/init/templates/non-returner-typescript/.npmignore
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 src
 src/*.ts
 **/index.ts
diff --git a/src/init/templates/non-returner-typescript/README.md b/src/init/templates/non-returner-typescript/README.md
index a37043c..c3cca83 100644
--- a/src/init/templates/non-returner-typescript/README.md
+++ b/src/init/templates/non-returner-typescript/README.md
@@ -1,2 +1,4 @@
+<!-- SPDX-License-Identifier: Apache-2.0 -->
+
 # {{rulename}}
 Read me of {{rulename}} from {{orgname}}
diff --git a/src/init/templates/returner-typescript/.github/workflows/publish.yml b/src/init/templates/returner-typescript/.github/workflows/publish.yml
index b38a94b..bcc93a6 100644
--- a/src/init/templates/returner-typescript/.github/workflows/publish.yml
+++ b/src/init/templates/returner-typescript/.github/workflows/publish.yml
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 on:
   push:
     branches:
diff --git a/src/init/templates/returner-typescript/.npmignore b/src/init/templates/returner-typescript/.npmignore
index fd9d7b8..fe5e260 100644
--- a/src/init/templates/returner-typescript/.npmignore
+++ b/src/init/templates/returner-typescript/.npmignore
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
 src
 src/*.ts
 **/index.ts
diff --git a/src/init/templates/returner-typescript/README.md b/src/init/templates/returner-typescript/README.md
index a37043c..c3cca83 100644
--- a/src/init/templates/returner-typescript/README.md
+++ b/src/init/templates/returner-typescript/README.md
@@ -1,2 +1,4 @@
+<!-- SPDX-License-Identifier: Apache-2.0 -->
+
 # {{rulename}}
 Read me of {{rulename}} from {{orgname}}
diff --git a/src/module/module.ts b/src/module/module.ts
index 3cee14c..2cdfb8e 100644
--- a/src/module/module.ts
+++ b/src/module/module.ts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import * as shell from 'shelljs';
 import * as path from 'path';
diff --git a/src/start/start.ts b/src/start/start.ts
index 453366e..b80241d 100644
--- a/src/start/start.ts
+++ b/src/start/start.ts
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import * as shell from 'shelljs';
 import * as path from 'path';