You can do this now directly in the Google environment. Should be trivial to vibe code Google Apps Script to hit a Slack endpoint. You'd probably use an 'on edit' trigger to run the code.

That's a great suggestion, thank you

For your signup workflows, how sensitive would you be to latency? Would a 30 to 60 second delay be a dealbreaker, or are you looking for something that hits Slack the instant the row is created?

(The challenge with Google Sheets is we'd have to poll for changes)