diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..32c4dfc
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..f0c1e67
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,40 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  validate:
+    name: Validate plugin (json / python / shell)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Validate JSON manifests
+        run: |
+          find . -name '*.json' -not -path './.git/*' -print0 \
+            | xargs -0 -n1 -I{} sh -c 'python -c "import json,sys; json.load(open(sys.argv[1]))" "$1" && echo "OK $1"' _ {}
+
+      - name: Byte-compile Python scripts
+        run: python -m compileall -q skills
+
+      - name: Lint Python scripts (ruff, error-level)
+        run: |
+          python -m pip install --upgrade pip ruff
+          ruff check --select E9,F63,F7,F82 skills
+
+      - name: Shellcheck hooks
+        run: shellcheck hooks/*.sh