diff --git a/src/greet.ts b/src/greet.ts
index 1a2b3c4..5d6e7f8 100644
--- a/src/greet.ts
+++ b/src/greet.ts
@@ -1,8 +1,9 @@
 // Greeting helpers
-export function greet(name) {
-  return "Hello " + name;
+export function greet(name: string): string {
+  const trimmed = name.trim();
+  return `Hello, ${trimmed || "world"}!`;
 }

-console.log(greet("there"));
+console.log(greet("  there  "));
diff --git a/scripts/run.py b/scripts/run.py
index aaaaaaa..bbbbbbb 100644
--- a/scripts/run.py
+++ b/scripts/run.py
@@ -1,4 +1,5 @@
 import sys

-def main():
-    print("hi")
+def main() -> int:
+    print("hello from python")
+    return 0
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ccccccc
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+# Demo
+A tiny sample used to exercise the highlighter.