refactor: extract iMessage echo cache and unify suppression guards

src/auto-reply/reply/dispatch-from-config.ts

@@ -17,6 +17,7 @@ import type { GetReplyOptions, ReplyPayload } from "../types.js";
 import { formatAbortReplyText, tryFastAbortFromMessage } from "./abort.js";
 import { shouldSkipDuplicateInbound } from "./inbound-dedupe.js";
 import type { ReplyDispatcher, ReplyDispatchKind } from "./reply-dispatcher.js";
+import { shouldSuppressReasoningPayload } from "./reply-payloads.js";
 import { isRoutableChannel, routeReply } from "./route-reply.js";
 
 const AUDIO_PLACEHOLDER_RE = /^<media:audio>(\s*\([^)]*\))?$/i;
@@ -366,7 +367,7 @@ export async function dispatchReplyFromConfig(params: {
             // Suppress reasoning payloads — channels using this generic dispatch
             // path (WhatsApp, web, etc.) do not have a dedicated reasoning lane.
             // Telegram has its own dispatch path that handles reasoning splitting.
-            if (payload.isReasoning) {
+            if (shouldSuppressReasoningPayload(payload)) {
               return;
             }
             // Accumulate block text for TTS generation after streaming
@@ -404,7 +405,7 @@ export async function dispatchReplyFromConfig(params: {
     for (const reply of replies) {
       // Suppress reasoning payloads from channel delivery — channels using this
       // generic dispatch path do not have a dedicated reasoning lane.
-      if (reply.isReasoning) {
+      if (shouldSuppressReasoningPayload(reply)) {
         continue;
       }
       const ttsReply = await maybeApplyTtsToPayload({

src/auto-reply/reply/reply-payloads.ts

@@ -68,6 +68,10 @@ export function isRenderablePayload(payload: ReplyPayload): boolean {
   );
 }
 
+export function shouldSuppressReasoningPayload(payload: ReplyPayload): boolean {
+  return payload.isReasoning === true;
+}
+
 export function applyReplyThreading(params: {
   payloads: ReplyPayload[];
   replyToMode: ReplyToMode;

src/auto-reply/reply/route-reply.ts

@@ -15,6 +15,7 @@ import { INTERNAL_MESSAGE_CHANNEL, normalizeMessageChannel } from "../../utils/m
 import type { OriginatingChannelType } from "../templating.js";
 import type { ReplyPayload } from "../types.js";
 import { normalizeReplyPayload } from "./normalize-reply.js";
+import { shouldSuppressReasoningPayload } from "./reply-payloads.js";
 
 export type RouteReplyParams = {
   /** The reply payload to send. */
@@ -56,7 +57,7 @@ export type RouteReplyResult = {
  */
 export async function routeReply(params: RouteReplyParams): Promise<RouteReplyResult> {
   const { payload, channel, to, accountId, threadId, cfg, abortSignal } = params;
-  if (payload.isReasoning) {
+  if (shouldSuppressReasoningPayload(payload)) {
     return { ok: true };
   }
   const normalizedChannel = normalizeMessageChannel(channel);