diff --git a/extensions/whatsapp/src/auto-reply/deliver-reply.ts b/extensions/whatsapp/src/auto-reply/deliver-reply.ts
index f1fe0705e39..2a88096e96b 100644
--- a/extensions/whatsapp/src/auto-reply/deliver-reply.ts
+++ b/extensions/whatsapp/src/auto-reply/deliver-reply.ts
@@ -8,6 +8,7 @@ import {
 import { logVerbose, shouldLogVerbose } from "openclaw/plugin-sdk/runtime-env";
 import { loadWebMedia } from "../media.js";
 import {
+  type DeliverableWhatsAppOutboundPayload,
   normalizeWhatsAppOutboundPayload,
   normalizeWhatsAppPayloadTextPreservingIndentation,
   prepareWhatsAppOutboundMedia,
@@ -24,7 +25,7 @@ import { elide } from "./util.js";
 
 export async function deliverWebReply(params: {
   replyResult: ReplyPayload;
-  normalizedReplyResult?: ReturnType<typeof normalizeWhatsAppOutboundPayload<ReplyPayload>>;
+  normalizedReplyResult?: DeliverableWhatsAppOutboundPayload<ReplyPayload>;
   msg: WebInboundMsg;
   mediaLocalRoots?: readonly string[];
   maxMediaBytes: number;
@@ -51,7 +52,9 @@ export async function deliverWebReply(params: {
     normalizeWhatsAppOutboundPayload(replyResult, {
       normalizeText: normalizeWhatsAppPayloadTextPreservingIndentation,
     });
-  const convertedText = markdownToWhatsApp(convertMarkdownTables(normalizedReply.text, tableMode));
+  const convertedText = markdownToWhatsApp(
+    convertMarkdownTables(normalizedReply.text ?? "", tableMode),
+  );
   const textChunks = chunkMarkdownTextWithMode(convertedText, textLimit, chunkMode);
   const mediaList = normalizedReply.mediaUrls ?? [];
 
diff --git a/extensions/whatsapp/src/auto-reply/monitor/inbound-dispatch.ts b/extensions/whatsapp/src/auto-reply/monitor/inbound-dispatch.ts
index 2d8e210ff92..794b8244f52 100644
--- a/extensions/whatsapp/src/auto-reply/monitor/inbound-dispatch.ts
+++ b/extensions/whatsapp/src/auto-reply/monitor/inbound-dispatch.ts
@@ -1,5 +1,6 @@
 import { resolveMergedWhatsAppAccountConfig } from "../../account-config.js";
 import {
+  type DeliverableWhatsAppOutboundPayload,
   normalizeWhatsAppOutboundPayload,
   normalizeWhatsAppPayloadTextPreservingIndentation,
 } from "../../outbound-media-contract.js";
@@ -250,6 +251,7 @@ export async function dispatchWhatsAppBufferedReply(params: {
   conversationId: string;
   deliverReply: (params: {
     replyResult: ReplyPayload;
+    normalizedReplyResult?: DeliverableWhatsAppOutboundPayload<ReplyPayload>;
     msg: WebInboundMsg;
     mediaLocalRoots: readonly string[];
     maxMediaBytes: number;
diff --git a/extensions/whatsapp/src/outbound-media-contract.ts b/extensions/whatsapp/src/outbound-media-contract.ts
index e01b2eb2d44..8f7cb9de064 100644
--- a/extensions/whatsapp/src/outbound-media-contract.ts
+++ b/extensions/whatsapp/src/outbound-media-contract.ts
@@ -24,6 +24,22 @@ type WhatsAppLoadedMediaLike = {
   fileName?: string;
 };
 
+export type NormalizedWhatsAppOutboundPayload<T extends WhatsAppOutboundPayloadLike> = Omit<
+  T,
+  "text" | "mediaUrl" | "mediaUrls"
+> & {
+  text: string;
+  mediaUrl?: string;
+  mediaUrls?: string[];
+};
+
+export type DeliverableWhatsAppOutboundPayload<T extends WhatsAppOutboundPayloadLike> = Omit<
+  NormalizedWhatsAppOutboundPayload<T>,
+  "text"
+> & {
+  text?: string;
+};
+
 export type CanonicalWhatsAppLoadedMedia = {
   buffer: Buffer;
   kind: "image" | "audio" | "video" | "document";
@@ -82,11 +98,7 @@ export function normalizeWhatsAppOutboundPayload<T extends WhatsAppOutboundPaylo
   options?: {
     normalizeText?: (text: string | undefined) => string;
   },
-): Omit<T, "text" | "mediaUrl" | "mediaUrls"> & {
-  text: string;
-  mediaUrl?: string;
-  mediaUrls?: string[];
-} {
+): NormalizedWhatsAppOutboundPayload<T> {
   const mediaUrls = resolveWhatsAppOutboundMediaUrls(payload);
   const normalizeText = options?.normalizeText ?? normalizeWhatsAppPayloadText;
   return {