diff --git a/.forgejo/workflows/renovate-config-validation.yaml b/.forgejo/workflows/renovate-config-validation.yaml
new file mode 100644
index 0000000..96a34e1
--- /dev/null
+++ b/.forgejo/workflows/renovate-config-validation.yaml
@@ -0,0 +1,24 @@
+---
+name: Checking Renovate configuration
+
+on:  # yamllint disable-line rule:truthy
+  pull_request:
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+      - name: Cache npm (renovate)
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-npm-renovate
+          restore-keys: |
+            ${{ runner.os }}-npm-renovate-
+      - name: Validate Renovate configuration
+        uses: suzuki-shunsuke/github-action-renovate-config-validator@v1.1.1
+        env:
+          NPM_CONFIG_CACHE: ~/.npm
+...
diff --git a/.forgejo/workflows/yamllint.yaml b/.forgejo/workflows/yamllint.yaml
new file mode 100644
index 0000000..1b5cb26
--- /dev/null
+++ b/.forgejo/workflows/yamllint.yaml
@@ -0,0 +1,18 @@
+---
+name: Checking yaml
+
+on:  # yamllint disable-line rule:truthy
+  pull_request:
+
+jobs:
+  yamllint:
+    name: Run yamllint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+      - name: Run YAML linter
+        uses: bewuethr/yamllint-action@v1
+        with:
+          config-file: .yamllint.yaml
+...
diff --git a/.yamllint.yaml b/.yamllint.yaml
new file mode 100644
index 0000000..79bc82f
--- /dev/null
+++ b/.yamllint.yaml
@@ -0,0 +1,30 @@
+---
+ignore: |
+  .platformio
+  secrets.yaml
+
+rules:
+  braces: enable
+  brackets: enable
+  colons: enable
+  commas: enable
+  comments: enable
+  comments-indentation: enable
+  document-end: enable
+  document-start: enable
+  empty-lines:
+    max: 1
+  empty-values: disable
+  hyphens: enable
+  indentation: enable
+  key-duplicates: enable
+  key-ordering: disable
+  line-length:
+    max: 100
+  new-line-at-end-of-file: enable
+  new-lines: enable
+  octal-values: enable
+  quoted-strings: disable
+  trailing-spaces: enable
+  truthy: enable
+...