feat: vibe code done

tests/codegen/test1.json

@@ -0,0 +1,4 @@
+{
+  "prompt": "Write a Python function that calculates the factorial of a number using recursion.",
+  "expected": "def factorial(n):\\n    if n == 0 or n == 1:\\n        return 1\\n    else:\\n        return n * factorial(n-1)"
+}