diff --git a/src/gptscript.ts b/src/gptscript.ts
index 14a8ecb..c47e56a 100644
--- a/src/gptscript.ts
+++ b/src/gptscript.ts
@@ -878,6 +878,7 @@ export interface PromptFrame {
     message: string
     fields: string[]
     sensitive: boolean
+    metadata: Record<string, string>
 }
 
 export type Frame = RunFrame | CallFrame | PromptFrame