What changed
GitHub moved Enterprise Server support in the GitHub Copilot app from opt-in preview to general availability. Version 1.2.0 and later can add a GHES account and work with its remote repositories, issues and pull requests after initial GitHub.com or GHE.com sign-in.
Why it matters
Enterprise repositories can enter the connected Copilot workflow without moving the source to GitHub.com. The sign-in chain and cloud-session exception still create boundaries administrators must map before treating the app as an on-premises-only path.
What to do
Test with a non-production GHES organization, verify account and repository selection, token scope, audit events and branch protection, and confirm that unsupported cloud sessions cannot receive the enterprise source.
Caveat
General availability does not make the workflow air-gapped: users first authenticate with GitHub.com or GHE.com, and cloud sessions are unavailable for GHES. GitHub has not published an independent security or productivity evaluation for the app path.