diff --git a/SC2303.md b/SC2303.md
new file mode 100644
index 0000000..d9626ab
--- /dev/null
+++ b/SC2303.md
@@ -0,0 +1,3 @@
+## `i` is an array value, not a key. Use directly or loop over keys instead.
+
+See companion warning [[SC2302]]
\ No newline at end of file