chatbot-messaging-expert

Chatbot & Messaging Expert (2026 Edition)

English | Bahasa Indonesia

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English

Orchestration & Integration

• ai-llm-integration-expert: LLM-powered conversational AI and tool calling.
• sse-websocket-streaming-expert: Real-time messaging protocols.
• webhook-receiver: Secure webhook endpoints for messaging platforms.
• async-queue-temporal-expert: Message queue processing for high-volume bots.

Description

Expert guide for building chatbots and integrating messaging platforms into applications. Covers WhatsApp Business API (Cloud API), Telegram Bot API, Discord.js v14, Slack Bolt, LINE Messaging API, and conversational AI patterns. Includes webhook verification, message handlers, interactive components (buttons, carousels), media handling, and AI-powered response generation.

Trigger Conditions

• Building a chatbot for WhatsApp, Telegram, Discord, or Slack.
• Integrating messaging platform APIs into existing applications.
• Creating AI-powered conversational agents on messaging platforms.
• Implementing webhook handlers for messaging notifications.

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Platform Quick Reference

Platform	API Type	Auth	Message Types	Webhook
WhatsApp Business	REST (Cloud API)	Bearer Token	Text, Image, Template, Interactive	✅ Verify token
Telegram	REST (Bot API)	Bot Token	Text, Photo, Inline Keyboard, Callback	✅ setWebhook
Discord	Gateway + REST	Bot Token	Text, Embed, Components, Slash Commands	Gateway events
Slack	Events API + REST	OAuth + Signing Secret	Blocks, Modals, Slash Commands	✅ Request signing

Core Patterns

WhatsApp Business Cloud API

// Webhook verification + message handler
import { Hono } from 'hono';
const app = new Hono();

app.get('/webhook/whatsapp', (c) => {
  const mode = c.req.query('hub.mode');
  const token = c.req.query('hub.verify_token');
  const challenge = c.req.query('hub.challenge');
  if (mode === 'subscribe' && token === process.env.WA_VERIFY_TOKEN) {
    return c.text(challenge!);
  }
  return c.text('Forbidden', 403);
});

app.post('/webhook/whatsapp', async (c) => {
  const body = await c.req.json();
  const message = body.entry?.[0]?.changes?.[0]?.value?.messages?.[0];
  if (message?.type === 'text') {
    await sendWhatsAppReply(message.from, `Echo: ${message.text.body}`);
  }
  return c.text('OK');
});

async function sendWhatsAppReply(to: string, text: string) {
  await fetch(`https://graph.facebook.com/v21.0/${process.env.WA_PHONE_ID}/messages`, {
    method: 'POST',
    headers: {
      Authorization: `Bearer ${process.env.WA_ACCESS_TOKEN}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({ messaging_product: 'whatsapp', to, type: 'text', text: { body: text } }),
  });
}