diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 44d8984..46e8cf3 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,3 +1,4 @@
+---
 # To get started with Dependabot version updates, you'll need to specify which
 # package ecosystems to update and where the package manifests are located.
 # Please see the documentation for all configuration options:
@@ -5,7 +6,7 @@
 
 version: 2
 updates:
-  - package-ecosystem: "github-actions" # See documentation for possible values
+  - package-ecosystem: github-actions
     directory: "/" # Location of package manifests
     schedule:
-      interval: "daily"
+      interval: daily
diff --git a/.github/workflows/self_check.yml b/.github/workflows/self_check.yml
new file mode 100644
index 0000000..b73b662
--- /dev/null
+++ b/.github/workflows/self_check.yml
@@ -0,0 +1,22 @@
+---
+name: Self Checks
+on: pull_request
+
+jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: actionlint
+        uses: raven-actions/actionlint@v2
+  yamllint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+      - name: Install yamllint
+        run: pip3 install yamllint
+      - name: Run yamllint
+        run: yamllint -f github .
diff --git a/.yamllint b/.yamllint
new file mode 100644
index 0000000..8de7f11
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,6 @@
+---
+rules:
+  indentation:
+    spaces: 2
+  line-length:
+    max: 250