GitHub Copilot adds local sandboxing and separate accounts in weekly releases

GitHub makes local sandboxing generally available in Copilot CLI, the Copilot app, and VS Code sessions using Agent Host, limiting agents' access to files, networks, and credentials at no extra cost.

The Copilot app now lets users sign in with separate GitHub accounts for the Copilot license and for repositories.

Copilot CLI's /model command lists local models from a running Ollama instance alongside cloud models, and VS Code 1.141 adds a side-by-side agent session grid and worktree cleanup.