diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..f422c34
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,13 @@
+name: 'Hello World'
+description: 'Greet someone and record the time'
+inputs:
+  who-to-greet:  # id of input
+    description: 'Who to greet'
+    required: true
+    default: 'World'
+outputs:
+  time: # id of output
+    description: 'The time we greeted you'
+runs:
+  using: 'node12'
+  main: 'index.js'
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