diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index c20d7abf6..08c14c94e 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 ---
 name: Bug report
 about: Create a report to help us improve
diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
index 57488385d..d9e4af1b0 100644
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 ---
 blank_issues_enabled: false
 contact_links:
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
index 1c50f6145..d4a23ba86 100644
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 ---
 name: Feature request
 about: Suggest an idea for this project
diff --git a/.github/ISSUE_TEMPLATE/i-need-help.md b/.github/ISSUE_TEMPLATE/i-need-help.md
index 8bf1a4da4..6009d5d9a 100644
--- a/.github/ISSUE_TEMPLATE/i-need-help.md
+++ b/.github/ISSUE_TEMPLATE/i-need-help.md
@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 ---
 name: I need help
 about: Get support from our community
diff --git a/.github/workflows/close-stale-issues.yml b/.github/workflows/close-stale-issues.yml
index 3a799821b..9cb95552d 100644
--- a/.github/workflows/close-stale-issues.yml
+++ b/.github/workflows/close-stale-issues.yml
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
 ---
 name: 'Close stale issues and PRs'
 on:  # yamllint disable-line rule:truthy
diff --git a/docs/just.md b/docs/just.md
index ecc09e495..0d969ecab 100644
--- a/docs/just.md
+++ b/docs/just.md
@@ -1,3 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2024 MDAD Team and contributors
+SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Running `just` commands
 
 We have previously used [make](https://www.gnu.org/software/make/) for easily running some playbook commands (e.g. `make roles` which triggers [`ansible-galaxy`](https://docs.ansible.com/ansible/latest/cli/ansible-galaxy.html)). Our [`Makefile`](../Makefile) is still around, and you can still run these commands.
diff --git a/docs/quick-start.md b/docs/quick-start.md
index 11d8cb7d4..860a374b4 100644
--- a/docs/quick-start.md
+++ b/docs/quick-start.md
@@ -1,3 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2024 MDAD Team and contributors
+SPDX-FileCopyrightText: 2024 Suguru Hirahara <acioustick@noreply.codeberg.org>
+
+SPDX-License-Identifier: AGPL-3.0-or-later
+-->
+
 # Quick start
 
 <!--