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luren 5461ea982b feat(telegram): add native DM draft streaming with segmented stream results (#340 )

## Summary

Add native Telegram DM streaming via `sendMessageDraft` while preserving
Chat SDK's existing post+edit fallback for non-DM threads.

This PR:
- adds native private-chat draft streaming to the Telegram adapter
- splits long streamed markdown into Telegram-safe persisted segments
- retries without `parse_mode` when Telegram rejects markdown entity
parsing
- exposes segmented native stream results in the chat core
- updates docs and feature matrices to reflect Telegram DM draft
streaming

---------

Co-authored-by: dancer <josh@afterima.ge>

2026-05-28 15:17:10 -07:00

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Chat SDK

A unified TypeScript SDK for building chat bots across Slack, Microsoft Teams, Google Chat, Discord, Telegram, GitHub, Linear, and WhatsApp. Write your bot logic once, deploy everywhere.

Installation

npm install chat

Install adapters for your platforms:

npm install @chat-adapter/slack @chat-adapter/teams @chat-adapter/gchat @chat-adapter/discord @chat-adapter/telegram

Usage

import { Chat } from "chat";
import { createSlackAdapter } from "@chat-adapter/slack";
import { createRedisState } from "@chat-adapter/state-redis";

const bot = new Chat({
  userName: "mybot",
  adapters: {
    slack: createSlackAdapter(),
  },
  state: createRedisState(),
});

bot.onNewMention(async (thread) => {
  await thread.subscribe();
  await thread.post("Hello! I'm listening to this thread.");
});

bot.onSubscribedMessage(async (thread, message) => {
  await thread.post(`You said: ${message.text}`);
});

See the Getting Started guide for a full walkthrough.

Adapters

Browse official, vendor-official, and community adapters on chat-sdk.dev/adapters. A cross-platform feature matrix is available at chat-sdk.dev/docs/adapters.

Features

Event handlers — mentions, messages, reactions, button clicks, slash commands, modals
AI streaming — stream LLM responses with native Slack streaming, Telegram private chat draft previews, and post+edit fallback
Cards — JSX-based interactive cards (Block Kit, Adaptive Cards, Google Chat Cards)
Actions — handle button clicks and dropdown selections
Modals — form dialogs with text inputs, dropdowns, and validation
Slash commands — handle /command invocations
Emoji — type-safe, cross-platform emoji with custom emoji support
File uploads — send and receive file attachments
Direct messages — initiate DMs programmatically
Ephemeral messages — user-only visible messages with DM fallback
Overlapping messages - burst, queue, debounce, drop, or process concurrent messages on the same thread

AI coding agent support

If you use an AI coding agent like Claude Code, you can teach it about Chat SDK:

npx skills add vercel/chat

Documentation

Full documentation is available at chat-sdk.dev/docs.

Contributing

See CONTRIBUTING.md for development setup and the release process.

Support

For help or questions, see SUPPORT.md. To report a security vulnerability, see SECURITY.md.

License

MIT

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