Summary
In the August 28, 2026 GitHub Copilot Visual Studio update, organization and enterprise owners can publish custom agents for use across every repository in their org, and Visual Studio auto-detects them in the agent picker with descriptions and org source. The update also adds Low/Medium/High model thinking-effort controls and a Git agent that reviews uncommitted changes or commits before a pull request.
What changed
GitHub added organization- and enterprise-level publishing of custom Copilot agents that Visual Studio automatically surfaces in the agent picker, three-level (Low/Medium/High) model thinking-effort controls, and a Git agent code review that inspects uncommitted changes or commits pre-PR across GitHub and Azure DevOps repositories.
Why it matters
Org-published agents turn Copilot customization into a governed, centrally distributed capability instead of per-developer configuration — important for standardizing agent behavior and policy at enterprise scale. Pre-PR Git-agent review shifts code review earlier, and effort dials let teams trade cost for depth per task.
Evidence excerpt
"GitHub organization and enterprise owners can publish custom agents for use across repositories in their organization." Supported models add Low, Medium, and High thinking effort; the Git agent reviews uncommitted changes or commits with "Findings appear inline in the editor with a navigable list in Git Changes."