diff --git a/.gitignore b/.gitignore
index b58065a6..8fdbb9c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -141,3 +141,16 @@ backend/storage/
 # committed 16 .pyc files here in #1247.
 __pycache__/
 *.pyc
+
+# Issue / PR screenshots belong on a `screenshots/*` branch, never on main or
+# stable — that is what those branches exist for. Two landed at the repo root
+# on main in #1241 and shipped as part of the source tree; nothing stopped it.
+#
+# Anchored with a leading slash so docs/ keeps its own images.
+/issue-*.png
+/issue-*.jpg
+/screenshot-*.png
+/screenshot-*.jpg
+/*-screenshot.png
+/*-screenshot.jpg
+