diff --git a/docs/channels/index.md b/docs/channels/index.md
index 4402e777c..203b43259 100644
--- a/docs/channels/index.md
+++ b/docs/channels/index.md
@@ -13,7 +13,7 @@ Text is supported everywhere; media and reactions vary by channel.
 
 - [WhatsApp](/channels/whatsapp) — Most popular; uses Baileys and requires QR pairing.
 - [Telegram](/channels/telegram) — Bot API via grammY; supports groups.
-- [Telegram User](/channels/telegram-user) — MTProto user account; DM-only for now (plugin, installed separately).
+- [Telegram User](/channels/telegram-user) — MTProto user account with DM + group support (plugin, installed separately).
 - [Discord](/channels/discord) — Discord Bot API + Gateway; supports servers, channels, and DMs.
 - [Slack](/channels/slack) — Bolt SDK; workspace apps.
 - [Google Chat](/channels/googlechat) — Google Chat API app via HTTP webhook.
diff --git a/docs/channels/telegram-user.md b/docs/channels/telegram-user.md
index 1d959950b..36d59ae37 100644
--- a/docs/channels/telegram-user.md
+++ b/docs/channels/telegram-user.md
@@ -1,10 +1,10 @@
 ---
-summary: "Connect a Telegram user account via MTProto (DM-only)"
+summary: "Connect a Telegram user account via MTProto (DMs + groups)"
 ---
 # Telegram User
 
 Telegram User connects Clawdbot to a **personal Telegram account** using MTProto.
-Use this when you need user-level DMs or want to message from your own account.
+Use this when you need user-level DMs or want to message from your own account in groups.
 
 ## Requirements
 
@@ -64,5 +64,5 @@ See [Pairing](/start/pairing) for details.
 
 ## Limitations
 
-- DM-only (no groups or channels yet).
+- Broadcast channels are not supported.
 - Calls are not supported.
diff --git a/extensions/telegram-user/package.json b/extensions/telegram-user/package.json
index 65f64a576..3585d1f73 100644
--- a/extensions/telegram-user/package.json
+++ b/extensions/telegram-user/package.json
@@ -14,7 +14,7 @@
       "detailLabel": "Telegram User",
       "docsPath": "/channels/telegram-user",
       "docsLabel": "telegram-user",
-      "blurb": "login as a Telegram user via QR; DM-only for now.",
+      "blurb": "login as a Telegram user via QR or phone code; supports DMs + groups.",
       "order": 12,
       "quickstartAllowFrom": true
     },
diff --git a/extensions/telegram-user/src/channel.ts b/extensions/telegram-user/src/channel.ts
index 0a31e3f14..2199a98cd 100644
--- a/extensions/telegram-user/src/channel.ts
+++ b/extensions/telegram-user/src/channel.ts
@@ -181,20 +181,25 @@ export const telegramUserPlugin: ChannelPlugin<ResolvedTelegramUserAccount> = {
       getTelegramUserRuntime().channel.text.chunkMarkdownText(text, limit),
     textChunkLimit: 4000,
     pollMaxOptions: 10,
-    sendText: async ({ to, text, accountId }) => {
-      const result = await sendMessageTelegramUser(to, text, { accountId: accountId ?? undefined });
-      return { channel: "telegram-user", ...result };
-    },
-    sendMedia: async ({ to, text, mediaUrl, accountId }) => {
-      const result = await sendMediaTelegramUser(to, text, {
+    sendText: async ({ to, text, accountId, threadId }) => {
+      const result = await sendMessageTelegramUser(to, text, {
         accountId: accountId ?? undefined,
-        mediaUrl,
+        threadId,
       });
       return { channel: "telegram-user", ...result };
     },
-    sendPoll: async ({ to, poll, accountId }) => {
+    sendMedia: async ({ to, text, mediaUrl, accountId, threadId }) => {
+      const result = await sendMediaTelegramUser(to, text, {
+        accountId: accountId ?? undefined,
+        mediaUrl,
+        threadId,
+      });
+      return { channel: "telegram-user", ...result };
+    },
+    sendPoll: async ({ to, poll, accountId, threadId }) => {
       const result = await sendPollTelegramUser(to, poll, {
         accountId: accountId ?? undefined,
+        threadId,
       });
       return { channel: "telegram-user", ...result };
     },
diff --git a/extensions/telegram-user/src/config-schema.ts b/extensions/telegram-user/src/config-schema.ts
index a1b791566..134f97050 100644
--- a/extensions/telegram-user/src/config-schema.ts
+++ b/extensions/telegram-user/src/config-schema.ts
@@ -31,6 +31,7 @@ const TelegramUserAccountSchema = z
     apiHash: z.string().optional(),
     dmPolicy: z.enum(["pairing", "allowlist", "open", "disabled"]).optional(),
     allowFrom: z.array(allowFromEntry).optional(),
+    replyToMode: z.enum(["off", "first", "all"]).optional(),
     textChunkLimit: z.number().int().positive().optional(),
     mediaMaxMb: z.number().positive().optional(),
     groupAllowFrom: z.array(allowFromEntry).optional(),
diff --git a/extensions/telegram-user/src/monitor/handler.ts b/extensions/telegram-user/src/monitor/handler.ts
index c66cd9f10..748bba880 100644
--- a/extensions/telegram-user/src/monitor/handler.ts
+++ b/extensions/telegram-user/src/monitor/handler.ts
@@ -661,6 +661,7 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
                   client,
                   accountId,
                   replyToId,
+                  threadId,
                   mediaUrl,
                   maxBytes: mediaMaxMb * 1024 * 1024,
                 });
@@ -685,6 +686,7 @@ export function createTelegramUserMessageHandler(params: TelegramUserHandlerPara
                     client,
                     accountId,
                     replyToId,
+                    threadId,
                   });
                 } catch (err) {
                   if (isDestroyedClientError(err)) return;
diff --git a/extensions/telegram-user/src/send.ts b/extensions/telegram-user/src/send.ts
index 5572f69c8..c2ec04885 100644
--- a/extensions/telegram-user/src/send.ts
+++ b/extensions/telegram-user/src/send.ts
@@ -29,17 +29,37 @@ export type TelegramUserSendOpts = {
   client?: TelegramClient;
   accountId?: string;
   replyToId?: number;
+  threadId?: string | number | null;
   mediaUrl?: string;
 };
 
-const normalizeTarget = (raw: string): string => {
+function normalizeTarget(raw: string): string {
   const trimmed = raw.trim();
   if (!trimmed) throw new Error("Recipient is required for Telegram User sends");
   const withoutProvider = trimmed.replace(/^(telegram-user|telegram|tg):/i, "").trim();
   const withoutPrefix = withoutProvider.replace(/^(user|group|channel|chat):/i, "").trim();
-  const topicSplit = withoutPrefix.split(/:topic:/i);
-  return (topicSplit[0] ?? withoutPrefix).trim();
-};
+  if (!withoutPrefix) throw new Error("Recipient is required for Telegram User sends");
+  return withoutPrefix;
+}
+
+function parseThreadId(value: string | number | null | undefined): number | undefined {
+  if (typeof value === "number") {
+    return Number.isFinite(value) ? Math.trunc(value) : undefined;
+  }
+  const trimmed = typeof value === "string" ? value.trim() : "";
+  if (!trimmed) return undefined;
+  const parsed = Number.parseInt(trimmed, 10);
+  return Number.isFinite(parsed) ? parsed : undefined;
+}
+
+function resolveTargetAndThread(raw: string, threadId?: string | number | null) {
+  const normalized = normalizeTarget(raw);
+  const [base, topicRaw] = normalized.split(/:topic:/i);
+  const parsedThreadId = parseThreadId(threadId ?? topicRaw);
+  const target = (base ?? normalized).trim();
+  if (!target) throw new Error("Recipient is required for Telegram User sends");
+  return { target, threadId: parsedThreadId };
+}
 
 export function normalizeTelegramUserMessagingTarget(raw: string): string {
   return normalizeTarget(raw);
@@ -50,6 +70,7 @@ export function looksLikeTelegramUserTargetId(value: string): boolean {
   if (!trimmed) return false;
   if (/^telegram-user:/i.test(trimmed)) return true;
   if (/^(user|group|channel|chat):/i.test(trimmed)) return true;
+  if (/^-?\d+:topic:\d+$/i.test(trimmed)) return true;
   return /^-?\d+$/.test(trimmed) || /^@?[a-z0-9_]{5,}$/i.test(trimmed);
 }
 
@@ -125,11 +146,13 @@ export async function sendMessageTelegramUser(
     accountId: opts.accountId,
   });
   try {
-    const target = resolveTelegramUserPeer(normalizeTarget(to));
+    const resolved = resolveTargetAndThread(to, opts.threadId);
+    const target = resolveTelegramUserPeer(resolved.target);
     let message: Awaited<ReturnType<TelegramClient["sendText"]>> | null = null;
     try {
       message = await client.sendText(target, text, {
         ...(opts.replyToId ? { replyTo: opts.replyToId } : {}),
+        ...(resolved.threadId ? { threadId: resolved.threadId } : {}),
       });
     } catch (err) {
       if (!isDestroyedClientError(err)) throw err;
@@ -157,7 +180,8 @@ export async function sendMediaTelegramUser(
     accountId: opts.accountId,
   });
   try {
-    const target = resolveTelegramUserPeer(normalizeTarget(to));
+    const resolved = resolveTargetAndThread(to, opts.threadId);
+    const target = resolveTelegramUserPeer(resolved.target);
     const media = await getTelegramUserRuntime().media.loadWebMedia(opts.mediaUrl, opts.maxBytes);
     const input = InputMedia.auto(media.buffer, {
       fileName: media.fileName ?? undefined,
@@ -168,6 +192,7 @@ export async function sendMediaTelegramUser(
     try {
       message = await client.sendMedia(target, input, {
         ...(opts.replyToId ? { replyTo: opts.replyToId } : {}),
+        ...(resolved.threadId ? { threadId: resolved.threadId } : {}),
       });
     } catch (err) {
       if (!isDestroyedClientError(err)) throw err;
@@ -195,7 +220,8 @@ export async function sendPollTelegramUser(
     accountId: opts.accountId,
   });
   try {
-    const target = resolveTelegramUserPeer(normalizeTarget(to));
+    const resolved = resolveTargetAndThread(to, opts.threadId);
+    const target = resolveTelegramUserPeer(resolved.target);
     const normalized = normalizePollInput(poll);
     const input = InputMedia.poll({
       question: normalized.question,
@@ -206,6 +232,7 @@ export async function sendPollTelegramUser(
     try {
       message = await client.sendMedia(target, input, {
         ...(opts.replyToId ? { replyTo: opts.replyToId } : {}),
+        ...(resolved.threadId ? { threadId: resolved.threadId } : {}),
       });
     } catch (err) {
       if (!isDestroyedClientError(err)) throw err;
diff --git a/extensions/telegram-user/src/types.ts b/extensions/telegram-user/src/types.ts
index 06085e1ed..26649e011 100644
--- a/extensions/telegram-user/src/types.ts
+++ b/extensions/telegram-user/src/types.ts
@@ -30,6 +30,8 @@ export type TelegramUserAccountConfig = {
   dmPolicy?: DmPolicy;
   /** Allowlist for DM senders (user ids or usernames, or "*"). */
   allowFrom?: Array<string | number>;
+  /** Control reply threading when reply tags are present (off|first|all). */
+  replyToMode?: "off" | "first" | "all";
   /** Outbound text chunk size (chars). Default: 4000. */
   textChunkLimit?: number;
   /** Max outbound media size in MB. */