diff --git a/.github/workflows/actions-lint.yml b/.github/workflows/actions-lint.yml
new file mode 100644
index 0000000..0c354d4
--- /dev/null
+++ b/.github/workflows/actions-lint.yml
@@ -0,0 +1,27 @@
+name: Actions Lint
+
+on:
+  workflow_call:
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  lint:
+    name: Lint Workflow Files
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        with:
+          persist-credentials: false
+
+      - name: Run actionlint
+        uses: docker://rhysd/actionlint:1.7.12
+        with:
+          args: -color
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        with:
+          advanced-security: false
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..3f7900d
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+    paths: ['.github/workflows/**']
+  pull_request:
+    branches: [main]
+    paths: ['.github/workflows/**']
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  actions-lint:
+    uses: ./.github/workflows/actions-lint.yml
diff --git a/README.md b/README.md
index 5a86cfe..be54a1c 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,32 @@
 # .github
+
+yellston-com organization の共有設定・Reusable Workflows を管理するリポジトリです。
+
+## Reusable Workflows
+
+### Actions Lint
+
+[actionlint](https://github.com/rhysd/actionlint) と [zizmor](https://github.com/zizmorcore/zizmor) でワークフローファイルを lint します。
+
+> [!TIP]
+> zizmor の unpinned-uses 警告を回避するには `@main` をコミットハッシュに置き換えてください。
+
+```yaml
+name: Actions Lint
+
+on:
+  push:
+    branches: [main]
+    paths: ['.github/workflows/**']
+  pull_request:
+    branches: [main]
+    paths: ['.github/workflows/**']
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  lint:
+    uses: yellston-com/.github/.github/workflows/actions-lint.yml@main
+```