tools: add helper to clean temporary files

scripts/cleanup_temp_files.py

@@ -0,0 +1,39 @@
+"""
+Small helper to remove common temporary files created while experimenting
+with the Kalshi starter code.
+
+This script is intentionally conservative and only targets a few known
+paths. Adjust it for your own workflow as needed.
+"""
+
+from __future__ import annotations
+
+import shutil
+from pathlib import Path
+
+
+def main() -> None:
+  root = Path(__file__).resolve().parents[1]
+
+  candidates = [
+      root / ".pytest_cache",
+      root / ".mypy_cache",
+      root / "__pycache__",
+  ]
+
+  removed_any = False
+
+  for path in candidates:
+      if path.exists():
+          print(f"Removing {path} ...")
+          shutil.rmtree(path)
+          removed_any = True
+
+  if not removed_any:
+      print("No known temporary directories found.")
+  else:
+      print("Cleanup finished.")
+
+
+if __name__ == "__main__":
+  main()