diff --git a/features/supports-at-rule.yml b/features/supports-at-rule.yml
new file mode 100644
index 00000000000..8f5fbce9a31
--- /dev/null
+++ b/features/supports-at-rule.yml
@@ -0,0 +1,4 @@
+name: at-rule()
+description: "The `at-rule()` function, when used with `@supports`, checks if a CSS at-rule is supported. For example `@supports at-rule(@starting-style)` checks if the `@starting-style` at-rule is supported."
+spec: https://drafts.csswg.org/css-conditional-5/#typedef-supports-at-rule-fn
+group: css
diff --git a/features/supports-at-rule.yml.dist b/features/supports-at-rule.yml.dist
new file mode 100644
index 00000000000..ffed7f6bcdd
--- /dev/null
+++ b/features/supports-at-rule.yml.dist
@@ -0,0 +1,6 @@
+# Generated from: supports-at-rule.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support: {}