diff --git a/packages/code-runtime/code-runtime-worker/src/runtime-host.ts b/packages/code-runtime/code-runtime-worker/src/runtime-host.ts
index 474a058e9f..d2bb1082b8 100644
--- a/packages/code-runtime/code-runtime-worker/src/runtime-host.ts
+++ b/packages/code-runtime/code-runtime-worker/src/runtime-host.ts
@@ -223,4 +223,5 @@ export class RuntimeOutputLedger {
 }
 
 export { decodeWorkerJson, encodeWorkerJson, snapshotCodeJsonValue } from './worker-json.ts'
+export { jsonValueBytesUpTo } from './output-json.ts'
 export type { WorkerJsonWire } from './worker-json.ts'