Similar - Hammerspoon detects whether I have a Teams meeting window open (I never have my camera on) and calls out to Home Assistant to control a WLED strip visible outside the room. Also have a Zigbee button for ad-hoc control if I'm called into a Slack huddle, etc.

(I've also got it parsing my Outlook iCal to do "meeting pending", "meeting maybe pending" but it turns out that Outlook's iCal is nonsense and parsing it is a fool's errand.)