diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..0979f54
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+  "yaml.schemas": {
+    "./schema.yaml": ".runny.yaml"
+  }
+}
diff --git a/schema.yaml b/schema.yaml
new file mode 100644
index 0000000..36a58d3
--- /dev/null
+++ b/schema.yaml
@@ -0,0 +1,27 @@
+type: object
+properties:
+  shell:
+    type: string
+  env:
+    type: array
+    items:
+      type: string
+  commands:
+    type: object
+    additionalProperties:
+      type: object
+      properties:
+        if:
+          type: string
+        run:
+          type: string
+        needs:
+          type: array
+          items:
+            type: string
+        env:
+          type: array
+          items:
+            type: string
+required:
+  - commands