diff --git a/extensions/telegram/src/channel.ts b/extensions/telegram/src/channel.ts
index a375281e40..8dbf4d0bd7 100644
--- a/extensions/telegram/src/channel.ts
+++ b/extensions/telegram/src/channel.ts
@@ -25,6 +25,7 @@ import {
   type ChannelPlugin,
   type OpenClawConfig,
   type ResolvedTelegramAccount,
+  type TelegramProbe,
 } from "openclaw/plugin-sdk";
 import { getTelegramRuntime } from "./runtime.js";
 
@@ -60,7 +61,7 @@ function parseThreadId(threadId?: string | number | null) {
   const parsed = Number.parseInt(trimmed, 10);
   return Number.isFinite(parsed) ? parsed : undefined;
 }
-export const telegramPlugin: ChannelPlugin<ResolvedTelegramAccount> = {
+export const telegramPlugin: ChannelPlugin<ResolvedTelegramAccount, TelegramProbe> = {
   id: "telegram",
   meta: {
     ...meta,
@@ -327,11 +328,7 @@ export const telegramPlugin: ChannelPlugin<ResolvedTelegramAccount> = {
       if (!groupIds.length && unresolvedGroups === 0 && !hasWildcardUnmentionedGroups) {
         return undefined;
       }
-      const botId =
-        (probe as { ok?: boolean; bot?: { id?: number } })?.ok &&
-        (probe as { bot?: { id?: number } }).bot?.id != null
-          ? (probe as { bot: { id: number } }).bot.id
-          : null;
+      const botId = probe?.ok && probe.bot?.id != null ? probe.bot.id : null;
       if (!botId) {
         return {
           ok: unresolvedGroups === 0 && !hasWildcardUnmentionedGroups,
@@ -357,15 +354,9 @@ export const telegramPlugin: ChannelPlugin<ResolvedTelegramAccount> = {
         cfg.channels?.telegram?.accounts?.[account.accountId]?.groups ??
         cfg.channels?.telegram?.groups;
       const allowUnmentionedGroups =
-        Boolean(
-          groups?.["*"] && (groups["*"] as { requireMention?: boolean }).requireMention === false,
-        ) ||
+        groups?.["*"]?.requireMention === false ||
         Object.entries(groups ?? {}).some(
-          ([key, value]) =>
-            key !== "*" &&
-            Boolean(value) &&
-            typeof value === "object" &&
-            (value as { requireMention?: boolean }).requireMention === false,
+          ([key, value]) => key !== "*" && value?.requireMention === false,
         );
       return {
         accountId: account.accountId,
diff --git a/src/channels/plugins/types.adapters.ts b/src/channels/plugins/types.adapters.ts
index f1f0720b0b..ab1473bf1e 100644
--- a/src/channels/plugins/types.adapters.ts
+++ b/src/channels/plugins/types.adapters.ts
@@ -105,7 +105,7 @@ export type ChannelOutboundAdapter = {
   sendPoll?: (ctx: ChannelPollContext) => Promise<ChannelPollResult>;
 };
 
-export type ChannelStatusAdapter<ResolvedAccount> = {
+export type ChannelStatusAdapter<ResolvedAccount, Probe = unknown, Audit = unknown> = {
   defaultRuntime?: ChannelAccountSnapshot;
   buildChannelSummary?: (params: {
     account: ResolvedAccount;
@@ -117,19 +117,19 @@ export type ChannelStatusAdapter<ResolvedAccount> = {
     account: ResolvedAccount;
     timeoutMs: number;
     cfg: OpenClawConfig;
-  }) => Promise<unknown>;
+  }) => Promise<Probe>;
   auditAccount?: (params: {
     account: ResolvedAccount;
     timeoutMs: number;
     cfg: OpenClawConfig;
-    probe?: unknown;
-  }) => Promise<unknown>;
+    probe?: Probe;
+  }) => Promise<Audit>;
   buildAccountSnapshot?: (params: {
     account: ResolvedAccount;
     cfg: OpenClawConfig;
     runtime?: ChannelAccountSnapshot;
-    probe?: unknown;
-    audit?: unknown;
+    probe?: Probe;
+    audit?: Audit;
   }) => ChannelAccountSnapshot | Promise<ChannelAccountSnapshot>;
   logSelfId?: (params: {
     account: ResolvedAccount;
diff --git a/src/channels/plugins/types.plugin.ts b/src/channels/plugins/types.plugin.ts
index 3e9b5d4dd7..044cbd5864 100644
--- a/src/channels/plugins/types.plugin.ts
+++ b/src/channels/plugins/types.plugin.ts
@@ -45,7 +45,7 @@ export type ChannelConfigSchema = {
 };
 
 // oxlint-disable-next-line typescript/no-explicit-any
-export type ChannelPlugin<ResolvedAccount = any> = {
+export type ChannelPlugin<ResolvedAccount = any, Probe = unknown, Audit = unknown> = {
   id: ChannelId;
   meta: ChannelMeta;
   capabilities: ChannelCapabilities;
@@ -65,7 +65,7 @@ export type ChannelPlugin<ResolvedAccount = any> = {
   groups?: ChannelGroupAdapter;
   mentions?: ChannelMentionAdapter;
   outbound?: ChannelOutboundAdapter;
-  status?: ChannelStatusAdapter<ResolvedAccount>;
+  status?: ChannelStatusAdapter<ResolvedAccount, Probe, Audit>;
   gatewayMethods?: string[];
   gateway?: ChannelGatewayAdapter<ResolvedAccount>;
   auth?: ChannelAuthAdapter;
diff --git a/src/plugin-sdk/index.ts b/src/plugin-sdk/index.ts
index e010e3749d..f742547edc 100644
--- a/src/plugin-sdk/index.ts
+++ b/src/plugin-sdk/index.ts
@@ -306,6 +306,7 @@ export {
   normalizeTelegramMessagingTarget,
 } from "../channels/plugins/normalize/telegram.js";
 export { collectTelegramStatusIssues } from "../channels/plugins/status-issues/telegram.js";
+export { type TelegramProbe } from "../telegram/probe.js";
 
 // Channel: Signal
 export {
diff --git a/src/telegram/bot-handlers.ts b/src/telegram/bot-handlers.ts
index 33e6b18c00..694425447e 100644
--- a/src/telegram/bot-handlers.ts
+++ b/src/telegram/bot-handlers.ts
@@ -1,6 +1,6 @@
-import type { TelegramMessage } from "./bot/types.js";
-import { resolveDefaultAgentId } from "../agents/agent-scope.js";
 // @ts-nocheck
+import type { Message } from "@grammyjs/types";
+import { resolveDefaultAgentId } from "../agents/agent-scope.js";
 import { hasControlCommand } from "../auto-reply/command-detection.js";
 import {
   createInboundDebouncer,
@@ -63,7 +63,7 @@ export const registerTelegramHandlers = ({
 
   type TextFragmentEntry = {
     key: string;
-    messages: Array<{ msg: TelegramMessage; ctx: unknown; receivedAtMs: number }>;
+    messages: Array<{ msg: Message; ctx: unknown; receivedAtMs: number }>;
     timer: ReturnType<typeof setTimeout>;
   };
   const textFragmentBuffer = new Map<string, TextFragmentEntry>();
@@ -72,7 +72,7 @@ export const registerTelegramHandlers = ({
   const debounceMs = resolveInboundDebounceMs({ cfg, channel: "telegram" });
   type TelegramDebounceEntry = {
     ctx: unknown;
-    msg: TelegramMessage;
+    msg: Message;
     allMedia: Array<{ path: string; contentType?: string }>;
     storeAllowFrom: string[];
     debounceKey: string | null;
@@ -111,7 +111,7 @@ export const registerTelegramHandlers = ({
       const baseCtx = first.ctx as { me?: unknown; getFile?: unknown } & Record<string, unknown>;
       const getFile =
         typeof baseCtx.getFile === "function" ? baseCtx.getFile.bind(baseCtx) : async () => ({});
-      const syntheticMessage: TelegramMessage = {
+      const syntheticMessage: Message = {
         ...first.msg,
         text: combinedText,
         caption: undefined,
@@ -231,7 +231,7 @@ export const registerTelegramHandlers = ({
         return;
       }
 
-      const syntheticMessage: TelegramMessage = {
+      const syntheticMessage: Message = {
         ...first.msg,
         text: combinedText,
         caption: undefined,
@@ -557,7 +557,7 @@ export const registerTelegramHandlers = ({
         if (modelCallback.type === "select") {
           const { provider, model } = modelCallback;
           // Process model selection as a synthetic message with /model command
-          const syntheticMessage: TelegramMessage = {
+          const syntheticMessage: Message = {
             ...callbackMessage,
             from: callback.from,
             text: `/model ${provider}/${model}`,
@@ -582,7 +582,7 @@ export const registerTelegramHandlers = ({
         return;
       }
 
-      const syntheticMessage: TelegramMessage = {
+      const syntheticMessage: Message = {
         ...callbackMessage,
         from: callback.from,
         text: data,
diff --git a/src/telegram/bot-native-commands.ts b/src/telegram/bot-native-commands.ts
index 311cfc2365..b48e6284d3 100644
--- a/src/telegram/bot-native-commands.ts
+++ b/src/telegram/bot-native-commands.ts
@@ -9,6 +9,7 @@ import type {
   TelegramTopicConfig,
 } from "../config/types.js";
 import type { RuntimeEnv } from "../runtime.js";
+import type { TelegramContext } from "./bot/types.js";
 import { resolveEffectiveMessagesConfig } from "../agents/identity.js";
 import { resolveChunkMode } from "../auto-reply/chunk.js";
 import {
@@ -86,7 +87,7 @@ export type RegisterTelegramHandlerParams = {
   ) => { groupConfig?: TelegramGroupConfig; topicConfig?: TelegramTopicConfig };
   shouldSkipUpdate: (ctx: TelegramUpdateKeyContext) => boolean;
   processMessage: (
-    ctx: unknown,
+    ctx: TelegramContext,
     allMedia: Array<{ path: string; contentType?: string }>,
     storeAllowFrom: string[],
     options?: {
diff --git a/src/telegram/bot-updates.ts b/src/telegram/bot-updates.ts
index c59e9ac219..bf1422fc1e 100644
--- a/src/telegram/bot-updates.ts
+++ b/src/telegram/bot-updates.ts
@@ -1,4 +1,5 @@
-import type { TelegramContext, TelegramMessage } from "./bot/types.js";
+import type { Message } from "@grammyjs/types";
+import type { TelegramContext } from "./bot/types.js";
 import { createDedupeCache } from "../infra/dedupe.js";
 
 const MEDIA_GROUP_TIMEOUT_MS = 500;
@@ -7,7 +8,7 @@ const RECENT_TELEGRAM_UPDATE_MAX = 2000;
 
 export type MediaGroupEntry = {
   messages: Array<{
-    msg: TelegramMessage;
+    msg: Message;
     ctx: TelegramContext;
   }>;
   timer: ReturnType<typeof setTimeout>;
@@ -16,12 +17,12 @@ export type MediaGroupEntry = {
 export type TelegramUpdateKeyContext = {
   update?: {
     update_id?: number;
-    message?: TelegramMessage;
-    edited_message?: TelegramMessage;
+    message?: Message;
+    edited_message?: Message;
   };
   update_id?: number;
-  message?: TelegramMessage;
-  callbackQuery?: { id?: string; message?: TelegramMessage };
+  message?: Message;
+  callbackQuery?: { id?: string; message?: Message };
 };
 
 export const resolveTelegramUpdateId = (ctx: TelegramUpdateKeyContext) =>
diff --git a/src/telegram/bot.ts b/src/telegram/bot.ts
index d3f6c8f546..44cb38176e 100644
--- a/src/telegram/bot.ts
+++ b/src/telegram/bot.ts
@@ -2,11 +2,11 @@ import type { ApiClientOptions } from "grammy";
 // @ts-nocheck
 import { sequentialize } from "@grammyjs/runner";
 import { apiThrottler } from "@grammyjs/transformer-throttler";
-import { ReactionTypeEmoji } from "@grammyjs/types";
+import { type Message, ReactionTypeEmoji } from "@grammyjs/types";
 import { Bot, webhookCallback } from "grammy";
 import type { OpenClawConfig, ReplyToMode } from "../config/config.js";
 import type { RuntimeEnv } from "../runtime.js";
-import type { TelegramContext, TelegramMessage } from "./bot/types.js";
+import type { TelegramContext } from "./bot/types.js";
 import { resolveDefaultAgentId } from "../agents/agent-scope.js";
 import { resolveTextChunkLimit } from "../auto-reply/chunk.js";
 import { isControlCommandMessage } from "../auto-reply/command-detection.js";
@@ -67,11 +67,11 @@ export type TelegramBotOptions = {
 
 export function getTelegramSequentialKey(ctx: {
   chat?: { id?: number };
-  message?: TelegramMessage;
+  message?: Message;
   update?: {
-    message?: TelegramMessage;
-    edited_message?: TelegramMessage;
-    callback_query?: { message?: TelegramMessage };
+    message?: Message;
+    edited_message?: Message;
+    callback_query?: { message?: Message };
     message_reaction?: { chat?: { id?: number } };
   };
 }): string {
diff --git a/src/telegram/bot/helpers.test.ts b/src/telegram/bot/helpers.test.ts
index a93e2d1b70..5b74959a64 100644
--- a/src/telegram/bot/helpers.test.ts
+++ b/src/telegram/bot/helpers.test.ts
@@ -100,40 +100,6 @@ describe("normalizeForwardedContext", () => {
     expect(ctx?.fromTitle).toBe("Hidden Name");
     expect(ctx?.date).toBe(456);
   });
-
-  it("handles legacy forwards with signatures", () => {
-    const ctx = normalizeForwardedContext({
-      forward_from_chat: {
-        title: "OpenClaw Updates",
-        username: "openclaw",
-        id: 99,
-        type: "channel",
-      },
-      forward_signature: "Stan",
-      forward_date: 789,
-      // oxlint-disable-next-line typescript/no-explicit-any
-    } as any);
-    expect(ctx).not.toBeNull();
-    expect(ctx?.from).toBe("OpenClaw Updates (Stan)");
-    expect(ctx?.fromType).toBe("legacy_channel");
-    expect(ctx?.fromId).toBe("99");
-    expect(ctx?.fromUsername).toBe("openclaw");
-    expect(ctx?.fromTitle).toBe("OpenClaw Updates");
-    expect(ctx?.fromSignature).toBe("Stan");
-    expect(ctx?.date).toBe(789);
-  });
-
-  it("handles legacy hidden sender names", () => {
-    const ctx = normalizeForwardedContext({
-      forward_sender_name: "Legacy Hidden",
-      forward_date: 111,
-      // oxlint-disable-next-line typescript/no-explicit-any
-    } as any);
-    expect(ctx).not.toBeNull();
-    expect(ctx?.from).toBe("Legacy Hidden");
-    expect(ctx?.fromType).toBe("legacy_hidden_user");
-    expect(ctx?.date).toBe(111);
-  });
 });
 
 describe("expandTextLinks", () => {
diff --git a/src/telegram/bot/helpers.ts b/src/telegram/bot/helpers.ts
index 5f91e7ab24..05e25cd11d 100644
--- a/src/telegram/bot/helpers.ts
+++ b/src/telegram/bot/helpers.ts
@@ -1,13 +1,5 @@
-import type {
-  TelegramForwardChat,
-  TelegramForwardOrigin,
-  TelegramForwardUser,
-  TelegramForwardedMessage,
-  TelegramLocation,
-  TelegramMessage,
-  TelegramStreamMode,
-  TelegramVenue,
-} from "./types.js";
+import type { Chat, Message, MessageOrigin, User } from "@grammyjs/types";
+import type { TelegramStreamMode } from "./types.js";
 import { formatLocationText, type NormalizedLocation } from "../../channels/location.js";
 
 const TELEGRAM_GENERAL_TOPIC_ID = 1;
@@ -107,14 +99,14 @@ export function buildTelegramGroupFrom(chatId: number | string, messageThreadId?
   return `telegram:group:${buildTelegramGroupPeerId(chatId, messageThreadId)}`;
 }
 
-export function buildSenderName(msg: TelegramMessage) {
+export function buildSenderName(msg: Message) {
   const name =
     [msg.from?.first_name, msg.from?.last_name].filter(Boolean).join(" ").trim() ||
     msg.from?.username;
   return name || undefined;
 }
 
-export function buildSenderLabel(msg: TelegramMessage, senderId?: number | string) {
+export function buildSenderLabel(msg: Message, senderId?: number | string) {
   const name = buildSenderName(msg);
   const username = msg.from?.username ? `@${msg.from.username}` : undefined;
   let label = name;
@@ -136,11 +128,7 @@ export function buildSenderLabel(msg: TelegramMessage, senderId?: number | strin
   return idPart ?? "id:unknown";
 }
 
-export function buildGroupLabel(
-  msg: TelegramMessage,
-  chatId: number | string,
-  messageThreadId?: number,
-) {
+export function buildGroupLabel(msg: Message, chatId: number | string, messageThreadId?: number) {
   const title = msg.chat?.title;
   const topicSuffix = messageThreadId != null ? ` topic:${messageThreadId}` : "";
   if (title) {
@@ -149,7 +137,7 @@ export function buildGroupLabel(
   return `group:${chatId}${topicSuffix}`;
 }
 
-export function hasBotMention(msg: TelegramMessage, botUsername: string) {
+export function hasBotMention(msg: Message, botUsername: string) {
   const text = (msg.text ?? msg.caption ?? "").toLowerCase();
   if (text.includes(`@${botUsername}`)) {
     return true;
@@ -218,7 +206,7 @@ export type TelegramReplyTarget = {
   kind: "reply" | "quote";
 };
 
-export function describeReplyTarget(msg: TelegramMessage): TelegramReplyTarget | null {
+export function describeReplyTarget(msg: Message): TelegramReplyTarget | null {
   const reply = msg.reply_to_message;
   const quote = msg.quote;
   let body = "";
@@ -275,28 +263,27 @@ export type TelegramForwardedContext = {
   fromSignature?: string;
 };
 
-function normalizeForwardedUserLabel(user: TelegramForwardUser) {
+function normalizeForwardedUserLabel(user: User) {
   const name = [user.first_name, user.last_name].filter(Boolean).join(" ").trim();
   const username = user.username?.trim() || undefined;
-  const id = user.id != null ? String(user.id) : undefined;
+  const id = String(user.id);
   const display =
     (name && username
       ? `${name} (@${username})`
-      : name || (username ? `@${username}` : undefined)) || (id ? `user:${id}` : undefined);
+      : name || (username ? `@${username}` : undefined)) || `user:${id}`;
   return { display, name: name || undefined, username, id };
 }
 
-function normalizeForwardedChatLabel(chat: TelegramForwardChat, fallbackKind: "chat" | "channel") {
+function normalizeForwardedChatLabel(chat: Chat, fallbackKind: "chat" | "channel") {
   const title = chat.title?.trim() || undefined;
   const username = chat.username?.trim() || undefined;
-  const id = chat.id != null ? String(chat.id) : undefined;
-  const display =
-    title || (username ? `@${username}` : undefined) || (id ? `${fallbackKind}:${id}` : undefined);
+  const id = String(chat.id);
+  const display = title || (username ? `@${username}` : undefined) || `${fallbackKind}:${id}`;
   return { display, title, username, id };
 }
 
 function buildForwardedContextFromUser(params: {
-  user: TelegramForwardUser;
+  user: User;
   date?: number;
   type: string;
 }): TelegramForwardedContext | null {
@@ -332,13 +319,12 @@ function buildForwardedContextFromHiddenName(params: {
 }
 
 function buildForwardedContextFromChat(params: {
-  chat: TelegramForwardChat;
+  chat: Chat;
   date?: number;
   type: string;
   signature?: string;
 }): TelegramForwardedContext | null {
-  const fallbackKind =
-    params.type === "channel" || params.type === "legacy_channel" ? "channel" : "chat";
+  const fallbackKind = params.type === "channel" ? "channel" : "chat";
   const { display, title, username, id } = normalizeForwardedChatLabel(params.chat, fallbackKind);
   if (!display) {
     return null;
@@ -356,101 +342,52 @@ function buildForwardedContextFromChat(params: {
   };
 }
 
-function resolveForwardOrigin(
-  origin: TelegramForwardOrigin,
-  signature?: string,
-): TelegramForwardedContext | null {
-  if (origin.type === "user" && origin.sender_user) {
-    return buildForwardedContextFromUser({
-      user: origin.sender_user,
-      date: origin.date,
-      type: "user",
-    });
+function resolveForwardOrigin(origin: MessageOrigin): TelegramForwardedContext | null {
+  switch (origin.type) {
+    case "user":
+      return buildForwardedContextFromUser({
+        user: origin.sender_user,
+        date: origin.date,
+        type: "user",
+      });
+    case "hidden_user":
+      return buildForwardedContextFromHiddenName({
+        name: origin.sender_user_name,
+        date: origin.date,
+        type: "hidden_user",
+      });
+    case "chat":
+      return buildForwardedContextFromChat({
+        chat: origin.sender_chat,
+        date: origin.date,
+        type: "chat",
+        signature: origin.author_signature,
+      });
+    case "channel":
+      return buildForwardedContextFromChat({
+        chat: origin.chat,
+        date: origin.date,
+        type: "channel",
+        signature: origin.author_signature,
+      });
+    default:
+      // Exhaustiveness guard: if Grammy adds a new MessageOrigin variant,
+      // TypeScript will flag this assignment as an error.
+      origin satisfies never;
+      return null;
   }
-  if (origin.type === "hidden_user") {
-    return buildForwardedContextFromHiddenName({
-      name: origin.sender_user_name,
-      date: origin.date,
-      type: "hidden_user",
-    });
-  }
-  if (origin.type === "chat" && origin.sender_chat) {
-    return buildForwardedContextFromChat({
-      chat: origin.sender_chat,
-      date: origin.date,
-      type: "chat",
-      signature,
-    });
-  }
-  if (origin.type === "channel" && origin.chat) {
-    return buildForwardedContextFromChat({
-      chat: origin.chat,
-      date: origin.date,
-      type: "channel",
-      signature,
-    });
-  }
-  return null;
 }
 
-/**
- * Extract forwarded message origin info from Telegram message.
- * Supports both new forward_origin API and legacy forward_from/forward_from_chat fields.
- */
-export function normalizeForwardedContext(msg: TelegramMessage): TelegramForwardedContext | null {
-  const forwardMsg = msg as TelegramForwardedMessage;
-  const signature = forwardMsg.forward_signature?.trim() || undefined;
-
-  if (forwardMsg.forward_origin) {
-    const originContext = resolveForwardOrigin(forwardMsg.forward_origin, signature);
-    if (originContext) {
-      return originContext;
-    }
+/** Extract forwarded message origin info from Telegram message. */
+export function normalizeForwardedContext(msg: Message): TelegramForwardedContext | null {
+  if (!msg.forward_origin) {
+    return null;
   }
-
-  if (forwardMsg.forward_from_chat) {
-    const legacyType =
-      forwardMsg.forward_from_chat.type === "channel" ? "legacy_channel" : "legacy_chat";
-    const legacyContext = buildForwardedContextFromChat({
-      chat: forwardMsg.forward_from_chat,
-      date: forwardMsg.forward_date,
-      type: legacyType,
-      signature,
-    });
-    if (legacyContext) {
-      return legacyContext;
-    }
-  }
-
-  if (forwardMsg.forward_from) {
-    const legacyContext = buildForwardedContextFromUser({
-      user: forwardMsg.forward_from,
-      date: forwardMsg.forward_date,
-      type: "legacy_user",
-    });
-    if (legacyContext) {
-      return legacyContext;
-    }
-  }
-
-  const hiddenContext = buildForwardedContextFromHiddenName({
-    name: forwardMsg.forward_sender_name,
-    date: forwardMsg.forward_date,
-    type: "legacy_hidden_user",
-  });
-  if (hiddenContext) {
-    return hiddenContext;
-  }
-
-  return null;
+  return resolveForwardOrigin(msg.forward_origin);
 }
 
-export function extractTelegramLocation(msg: TelegramMessage): NormalizedLocation | null {
-  const msgWithLocation = msg as {
-    location?: TelegramLocation;
-    venue?: TelegramVenue;
-  };
-  const { venue, location } = msgWithLocation;
+export function extractTelegramLocation(msg: Message): NormalizedLocation | null {
+  const { venue, location } = msg;
 
   if (venue) {
     return {
diff --git a/src/telegram/bot/types.ts b/src/telegram/bot/types.ts
index df3dba6d3e..3941e1f3b7 100644
--- a/src/telegram/bot/types.ts
+++ b/src/telegram/bot/types.ts
@@ -1,80 +1,20 @@
 import type { Message } from "@grammyjs/types";
 
-export type TelegramQuote = {
-  text?: string;
-};
-
-export type TelegramMessage = Message & {
-  quote?: TelegramQuote;
-};
-
+/** App-specific stream mode for Telegram draft streaming. */
 export type TelegramStreamMode = "off" | "partial" | "block";
 
-export type TelegramForwardOriginType = "user" | "hidden_user" | "chat" | "channel";
-
-export type TelegramForwardUser = {
-  first_name?: string;
-  last_name?: string;
-  username?: string;
-  id?: number;
-};
-
-export type TelegramForwardChat = {
-  title?: string;
-  id?: number;
-  username?: string;
-  type?: string;
-};
-
-export type TelegramForwardOrigin = {
-  type: TelegramForwardOriginType;
-  sender_user?: TelegramForwardUser;
-  sender_user_name?: string;
-  sender_chat?: TelegramForwardChat;
-  chat?: TelegramForwardChat;
-  date?: number;
-};
-
-export type TelegramForwardMetadata = {
-  forward_origin?: TelegramForwardOrigin;
-  forward_from?: TelegramForwardUser;
-  forward_from_chat?: TelegramForwardChat;
-  forward_sender_name?: string;
-  forward_signature?: string;
-  forward_date?: number;
-};
-
-export type TelegramForwardedMessage = TelegramMessage & TelegramForwardMetadata;
-
+/**
+ * Minimal context projection from Grammy's Context class.
+ * Decouples the message processing pipeline from Grammy's full Context,
+ * and allows constructing synthetic contexts for debounced/combined messages.
+ */
 export type TelegramContext = {
-  message: TelegramMessage;
+  message: Message;
   me?: { id?: number; username?: string };
-  getFile: () => Promise<{
-    file_path?: string;
-  }>;
+  getFile: () => Promise<{ file_path?: string }>;
 };
 
-/** Telegram Location object */
-export interface TelegramLocation {
-  latitude: number;
-  longitude: number;
-  horizontal_accuracy?: number;
-  live_period?: number;
-  heading?: number;
-}
-
-/** Telegram Venue object */
-export interface TelegramVenue {
-  location: TelegramLocation;
-  title: string;
-  address: string;
-  foursquare_id?: string;
-  foursquare_type?: string;
-  google_place_id?: string;
-  google_place_type?: string;
-}
-
-/** Telegram sticker metadata for context enrichment. */
+/** Telegram sticker metadata for context enrichment and caching. */
 export interface StickerMetadata {
   /** Emoji associated with the sticker. */
   emoji?: string;
diff --git a/src/telegram/proxy.ts b/src/telegram/proxy.ts
index 84251d7fee..f88b9d3926 100644
--- a/src/telegram/proxy.ts
+++ b/src/telegram/proxy.ts
@@ -1,11 +1,14 @@
-// @ts-nocheck
 import { ProxyAgent, fetch as undiciFetch } from "undici";
 import { wrapFetchWithAbortSignal } from "../infra/fetch.js";
 
 export function makeProxyFetch(proxyUrl: string): typeof fetch {
   const agent = new ProxyAgent(proxyUrl);
-  return wrapFetchWithAbortSignal((input: RequestInfo | URL, init?: RequestInit) => {
-    const base = init ? { ...init } : {};
-    return undiciFetch(input, { ...base, dispatcher: agent });
-  });
+  // undici's fetch is runtime-compatible with global fetch but the types diverge
+  // on stream/body internals. Single cast at the boundary keeps the rest type-safe.
+  const fetcher = (input: RequestInfo | URL, init?: RequestInit) =>
+    undiciFetch(input as string | URL, {
+      ...(init as Record<string, unknown>),
+      dispatcher: agent,
+    }) as unknown as Promise<Response>;
+  return wrapFetchWithAbortSignal(fetcher);
 }