From 626c3f9bc952e3ef910734e3320238b263fd1af2 Mon Sep 17 00:00:00 2001
From: Mizev Andrew <150728785+carpalsgrabby@users.noreply.github.com>
Date: Tue, 25 Nov 2025 09:51:31 +0100
Subject: [PATCH] Validate --leaves > 0
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Negative or zero leaves don’t make sense.
---
 sweep_layouts.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sweep_layouts.py b/sweep_layouts.py
index 159ea49..473dda9 100644
--- a/sweep_layouts.py
+++ b/sweep_layouts.py
@@ -131,7 +131,9 @@ def run_app(
 
 def main() -> None:
     args = parse_args()
-
+if args.leaves <= 0:
+        print("ERROR: --leaves must be > 0.", file=sys.stderr)
+        sys.exit(1)
     app_path = Path(args.app_path)
     if not app_path.is_file():
         print(f"ERROR: app.py not found at {app_path}", file=sys.stderr)