diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 000000000..01b21c4d4
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,3 @@
+# Coding Instructions for GitHub Copilot
+
+- Never commit or suggest changes to `main.js`.