GitHub extends Copilot chat data retention from 28 days to the life of the account on September 28
GitHub Changelog·high signal
GitHub's 2026-08-28 changelog consolidates Copilot Chat on github.com, GitHub Mobile, and the cloud agent into one experience under a single policy, and extends chat data retention from 28 days to the life of the account. The same date flips code review's default effort level from Lite to Balanced, so orgs that want Lite must select it explicitly before September 28 or their premium request consumption changes silently. Billing also moves to per-seat prepayment on October 1, with no prorated refunds on seat removal.