fix(telegram): degrade command sync on BOT_COMMANDS_TOO_MUCH

When Telegram rejects native command registration for excessive commands, progressively retry with fewer commands instead of hard-failing startup.

Made-with: Cursor
(cherry picked from commit a02c40483e)

src/telegram/bot-native-command-menu.test.ts

@@ -86,4 +86,42 @@ describe("bot-native-command-menu", () => {
 
     expect(callOrder).toEqual(["delete", "set"]);
   });
+
+  it("retries with fewer commands on BOT_COMMANDS_TOO_MUCH", async () => {
+    const deleteMyCommands = vi.fn(async () => undefined);
+    const setMyCommands = vi
+      .fn()
+      .mockRejectedValueOnce(new Error("400: Bad Request: BOT_COMMANDS_TOO_MUCH"))
+      .mockResolvedValue(undefined);
+    const runtimeLog = vi.fn();
+
+    syncTelegramMenuCommands({
+      bot: {
+        api: {
+          deleteMyCommands,
+          setMyCommands,
+        },
+      } as unknown as Parameters<typeof syncTelegramMenuCommands>[0]["bot"],
+      runtime: {
+        log: runtimeLog,
+        error: vi.fn(),
+        exit: vi.fn(),
+      } as Parameters<typeof syncTelegramMenuCommands>[0]["runtime"],
+      commandsToRegister: Array.from({ length: 100 }, (_, i) => ({
+        command: `cmd_${i}`,
+        description: `Command ${i}`,
+      })),
+    });
+
+    await vi.waitFor(() => {
+      expect(setMyCommands).toHaveBeenCalledTimes(2);
+    });
+    const firstPayload = setMyCommands.mock.calls[0]?.[0] as Array<unknown>;
+    const secondPayload = setMyCommands.mock.calls[1]?.[0] as Array<unknown>;
+    expect(firstPayload).toHaveLength(100);
+    expect(secondPayload).toHaveLength(80);
+    expect(runtimeLog).toHaveBeenCalledWith(
+      "Telegram rejected 100 commands (BOT_COMMANDS_TOO_MUCH); retrying with 80.",
+    );
+  });
 });

src/telegram/bot-native-command-menu.ts

@@ -7,6 +7,7 @@ import type { RuntimeEnv } from "../runtime.js";
 import { withTelegramApiErrorLogging } from "./api-logging.js";
 
 export const TELEGRAM_MAX_COMMANDS = 100;
+const TELEGRAM_COMMAND_RETRY_RATIO = 0.8;
 
 export type TelegramMenuCommand = {
   command: string;
@@ -18,6 +19,31 @@ type TelegramPluginCommandSpec = {
   description: string;
 };
 
+function isBotCommandsTooMuchError(err: unknown): boolean {
+  if (!err) {
+    return false;
+  }
+  const pattern = /\bBOT_COMMANDS_TOO_MUCH\b/i;
+  if (typeof err === "string") {
+    return pattern.test(err);
+  }
+  if (err instanceof Error) {
+    if (pattern.test(err.message)) {
+      return true;
+    }
+  }
+  if (typeof err === "object") {
+    const maybe = err as { description?: unknown; message?: unknown };
+    if (typeof maybe.description === "string" && pattern.test(maybe.description)) {
+      return true;
+    }
+    if (typeof maybe.message === "string" && pattern.test(maybe.message)) {
+      return true;
+    }
+  }
+  return false;
+}
+
 export function buildPluginTelegramMenuCommands(params: {
   specs: TelegramPluginCommandSpec[];
   existingCommands: Set<string>;
@@ -93,11 +119,34 @@ export function syncTelegramMenuCommands(params: {
       return;
     }
 
-    await withTelegramApiErrorLogging({
-      operation: "setMyCommands",
-      runtime,
-      fn: () => bot.api.setMyCommands(commandsToRegister),
-    });
+    let retryCommands = commandsToRegister;
+    while (retryCommands.length > 0) {
+      try {
+        await withTelegramApiErrorLogging({
+          operation: "setMyCommands",
+          runtime,
+          fn: () => bot.api.setMyCommands(retryCommands),
+        });
+        return;
+      } catch (err) {
+        if (!isBotCommandsTooMuchError(err)) {
+          throw err;
+        }
+        const nextCount = Math.floor(retryCommands.length * TELEGRAM_COMMAND_RETRY_RATIO);
+        const reducedCount =
+          nextCount < retryCommands.length ? nextCount : retryCommands.length - 1;
+        if (reducedCount <= 0) {
+          runtime.error?.(
+            "Telegram rejected native command registration (BOT_COMMANDS_TOO_MUCH); leaving menu empty. Reduce commands or disable channels.telegram.commands.native.",
+          );
+          return;
+        }
+        runtime.log?.(
+          `Telegram rejected ${retryCommands.length} commands (BOT_COMMANDS_TOO_MUCH); retrying with ${reducedCount}.`,
+        );
+        retryCommands = retryCommands.slice(0, reducedCount);
+      }
+    }
   };
 
   void sync().catch((err) => {