1 files changed, 9 insertions, 0 deletions
diff --git a/src/bun.js/scripts/class-definitions.ts b/src/bun.js/scripts/class-definitions.ts
index ae1e7cf35..17c82d166 100644
--- a/src/bun.js/scripts/class-definitions.ts
+++ b/src/bun.js/scripts/class-definitions.ts
@@ -29,6 +29,15 @@ export interface ClassDefinition {
   estimatedSize?: boolean;
   hasPendingActivity?: boolean;
   isEventEmitter?: boolean;
+
+  custom?: Record<string, CustomField>;
+}
+
+export interface CustomField {
+  header?: string;
+  extraHeaderIncludes?: string[];
+  impl?: string;
+  type?: string;
 }
 
 export function define(