GitHub Copilot adds agent mode with expanded model access and gh copilot shell integration in early 2026. July 2026 updates include a /security-review command for AI-driven vulnerability scanning, long-distance next edit suggestions across the active file, a C++ modernization agent in Visual Studio, and a refreshed usage window for billing tracking; Gemini 2.5 Pro and Gemini 3 Flash are deprecated on July 31, 2026, with new .NET/Azure-specific agents and enterprise admin model policy controls, while August 21, 2026 enables shared cloud-agent sessions via @GitHub in Slack or Teams.

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