What changed
No earlier than September 28, 2026, Copilot Chat on github.com, Chat in GitHub Mobile and the Copilot cloud agent become one experience under a single policy that’s on by default. Chat moves into agent sessions, and chat data is kept for the life of the account instead of 28 days. Users or teams opted out of the policy lose Copilot on github.com and Mobile. The default code review effort changes from Lite to Balanced, though explicit settings are kept.
Who it affects
Business and Enterprise admins, and organisations that use Copilot code review.
What to do
Review the new cloud agent policy and the longer chat retention against your data rules; select Lite explicitly if you want to keep it.
Source: https://github.blog/changelog/2026-08-28-upcoming-changes-to-github-copilot-policies-and-billing