diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index dbc1f0ce7747..008b473b18b5 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -4,6 +4,7 @@
 * Always use the latest version C#, currently C# 13 features.
 * Never change global.json unless explicitly asked to.
 * Never change package.json or package-lock.json files unless explicitly asked to.
+* Never change NuGet.config files unless explicitly asked to.
 
 ## Formatting