Pre-Call Brief — Calendar Trigger to Slack DM 30 Minutes Before

Trigger: Google Calendar event starts in 30 minutes, filtered to events with external attendees.

What this automates: Pre-call preparation that typically takes 15–30 minutes of manual research per meeting. Every sales call is preceded by a 2-minute-readable brief delivered automatically to the rep's Slack.

1. Calendar trigger fires 30 minutes before external meeting
2. Recent emails from attendee domain retrieved via Gmail Search
3. CRM deal notes retrieved for the contact via HubSpot
4. Claude API generates 2-minute pre-call brief: call goal, 3-bullet context, watch-outs, best opening question, must-accomplish outcome, post-call prep item
5. Brief Slack-DM'd to rep 30 minutes before call