diff --git a/type-generation/extract.ts b/type-generation/extract.ts
index 6320874..563c669 100644
--- a/type-generation/extract.ts
+++ b/type-generation/extract.ts
@@ -19,6 +19,14 @@ import {
   typeAliasIRToString,
 } from "./irToString.ts";
 
+import { mkdirSync, writeFileSync } from "fs";
+import { dirname } from "path";
+
+function writeFileSyncHelper(filePath: string, content: string) {
+  mkdirSync(dirname(filePath), { recursive: true });
+  writeFileSync(filePath, content, "utf-8");
+}
+
 function topologicalSortClasses(
   nameToCls: Map<string, InterfaceIR>,
 ): InterfaceIR[] {
@@ -78,6 +86,10 @@ function fixupClassBases(nameToCls: Map<string, InterfaceIR>): void {
 
 export function emitFiles(files: SourceFile[]): string[] {
   const result = convertFiles(files);
+  writeFileSyncHelper(
+    "../generated/js/ConversionResult.json",
+    JSON.stringify(result, null, 2),
+  );
   return emitIR(result);
 }