Warm Telegram confirmations from you for new Calendly bookings

Build me an agent workflow that sends a warm, personal Telegram confirmation from my own Telegram account the moment someone books time with me on Calendly, but only if that person is already an active Telegram DM contact of mine. If they're not, do nothing. I never want to cold-DM strangers on Telegram.

Trigger: a Calendly webhook. On first run, subscribe to Calendly's invitee.created event using calendly Create Webhook Subscription so we get a live push the instant a booking lands. The workflow runs on every invitee.created payload.

When a booking fires, the agent should:

1. Read the invitee's name, email, and event details (start time, event type name, timezone, location or join URL) from the webhook payload. If any critical field is missing or the event looks like a reschedule/cancellation rather than a fresh booking, exit.

2. Optionally enrich the event with calendly Get Scheduled Event to pull the full scheduled event (final time, location, conferencing link) so the confirmation can quote the exact meeting details. Use this when the webhook payload alone doesn't include the location or join URL.

3. Call telegram-secretary Receive Updates to fetch recent updates from my linked Telegram account. Scan the recent business_message updates for a matching sender. Match on: (a) the invitee's full name against the sender's Telegram display name, and (b) any identifier the invitee may have shared with me in that DM recently, like their email address, company, or a phone number found in the message text. Only accept the match if the confidence is high, otherwise stop. Never guess.

4. Before sending, verify the match is inside the 24 hour reply window that Telegram's Business API enforces for as-user sends. The Receive Updates payload includes the last message's timestamp per chat, and the business_connection carries the rights the account owner granted. If the last inbound message is older than 24 hours, or if can_reply is not granted for that chat, skip silently and record why.

5. Draft a short, personal confirmation in first person, referring to the meeting by day and local time (for example: "great, locked in for Thursday 3pm ET, sending you the Zoom link in the invite, talk soon"). Keep it 1 to 3 sentences, no signature, no emoji unless the recent thread uses emoji, no formal salutation. Match the tone of my last few messages in that chat when possible.

6. Send the confirmation via telegram-secretary Send Message as User to the matched chat_id, using the business_connection_id from the same update stream.

If at any step the agent cannot confidently identify an active, in-window Telegram chat for the invitee, it must exit without sending anything and log the reason (no match / window closed / rights missing). This is the important safety property: silent no-op is the default, sending is the exception.

Integrations to use: calendly (Create Webhook Subscription, Get Scheduled Event) and telegram-secretary (Receive Updates, Send Message as User).