From c39d5ada4dc18aebf85bb5ceb7b4262dbc66463d Mon Sep 17 00:00:00 2001
From: Aditya Paul <122125787+Paulie-Aditya@users.noreply.github.com>
Date: Sat, 21 Mar 2026 19:48:31 +0530
Subject: [PATCH] fix: Bug: Zod Schema Incompatible with OpenAI Structured
 Outputs API (#3462)

---
 mem0-ts/src/oss/src/prompts/index.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mem0-ts/src/oss/src/prompts/index.ts b/mem0-ts/src/oss/src/prompts/index.ts
index c39ac25db..96cd762dd 100644
--- a/mem0-ts/src/oss/src/prompts/index.ts
+++ b/mem0-ts/src/oss/src/prompts/index.ts
@@ -31,6 +31,7 @@ export const MemoryUpdateSchema = z.object({
         old_memory: z
           .string()
           .optional()
+          .nullable()
           .describe(
             "The previous content of the memory item if the event was UPDATE.",
           ),