Vercel's Chat SDK adds workflow approvals that survive deploys for up to 24 hours.

A new chat/workflow subpath exposes requestApproval, which posts an Approve/Deny card and suspends a Workflow SDK workflow until someone decides, returning {approved, user, timedOut} with optional approver restriction. Vercel's claim: the wait can last seconds or days and survives deploys and restarts, with signature verification, access control and audit trails handled by the platform. That deletes the standard human-in-the-loop scaffolding, no approvals table, no onAction handler, no polling loop. Worth an hour to evaluate if you're currently maintaining that plumbing.