fix: avoid silent telegram empty replies (#3796) (#3796)

src/telegram/bot-native-commands.ts

@@ -50,6 +50,8 @@ import {
 import { firstDefined, isSenderAllowed, normalizeAllowFromWithStore } from "./bot-access.js";
 import { readTelegramAllowFromStore } from "./pairing-store.js";
 
+const EMPTY_RESPONSE_FALLBACK = "No response generated. Please try again.";
+
 type TelegramNativeCommandContext = Context & { match?: string };
 
 type TelegramCommandAuthResult = {
@@ -483,13 +485,18 @@ export const registerTelegramNativeCommands = ({
               : undefined;
           const chunkMode = resolveChunkMode(cfg, "telegram", route.accountId);
 
+          const deliveryState = {
+            delivered: false,
+            skippedNonSilent: 0,
+          };
+
           await dispatchReplyWithBufferedBlockDispatcher({
             ctx: ctxPayload,
             cfg,
             dispatcherOptions: {
               responsePrefix: resolveEffectiveMessagesConfig(cfg, route.agentId).responsePrefix,
-              deliver: async (payload, info) => {
-                await deliverReplies({
+              deliver: async (payload, _info) => {
+                const result = await deliverReplies({
                   replies: [payload],
                   chatId: String(chatId),
                   token: opts.token,
@@ -501,8 +508,13 @@ export const registerTelegramNativeCommands = ({
                   tableMode,
                   chunkMode,
                   linkPreview: telegramCfg.linkPreview,
-                  notifyEmptyResponse: info.kind === "final",
                 });
+                if (result.delivered) {
+                  deliveryState.delivered = true;
+                }
+              },
+              onSkip: (_payload, info) => {
+                if (info.reason !== "silent") deliveryState.skippedNonSilent += 1;
               },
               onError: (err, info) => {
                 runtime.error?.(danger(`telegram slash ${info.kind} reply failed: ${String(err)}`));
@@ -513,6 +525,21 @@ export const registerTelegramNativeCommands = ({
               disableBlockStreaming,
             },
           });
+          if (!deliveryState.delivered && deliveryState.skippedNonSilent > 0) {
+            await deliverReplies({
+              replies: [{ text: EMPTY_RESPONSE_FALLBACK }],
+              chatId: String(chatId),
+              token: opts.token,
+              runtime,
+              bot,
+              replyToMode,
+              textLimit,
+              messageThreadId: threadIdForSend,
+              tableMode,
+              chunkMode,
+              linkPreview: telegramCfg.linkPreview,
+            });
+          }
         });
       }