diff --git a/src/gptscript.ts b/src/gptscript.ts
index b18c152..3694b41 100644
--- a/src/gptscript.ts
+++ b/src/gptscript.ts
@@ -719,6 +719,7 @@ export interface ArgumentSchema {
 
 export interface Program {
     name: string
+    entryToolId: string
     toolSet: Record<string, Tool>
     openAPICache: Record<string, any>
 }