diff --git a/interfaces/budget-api.idl b/interfaces/budget-api.idl
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+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into reffy-reports
+// (https://github.com/tidoust/reffy-reports)
+// Source: Web Budget API (https://wicg.github.io/budget-api/)
+
+[Exposed=Window]
+partial interface Navigator {
+    [SameObject] readonly attribute BudgetService budget;
+};
+
+[Exposed=Worker]
+partial interface WorkerNavigator {
+    [SameObject] readonly attribute BudgetService budget;
+};
+
+[Exposed=(Window,Worker)]
+interface BudgetService {
+    Promise<double> getCost(OperationType operation);
+    Promise<sequence<BudgetState>> getBudget();
+
+    Promise<boolean> reserve(OperationType operation);
+};
+
+[Exposed=(Window,Worker)]
+interface BudgetState {
+  readonly attribute double budgetAt;
+  readonly attribute DOMTimeStamp time;
+};
+
+enum OperationType {
+  "silent-push"
+};