GitHub announced on September 2, 2026, that its Copilot app and Command Line Interface (CLI) now enforce content exclusion policies. ^[1] GitHub announced on September 2, 2026, a new feature allowing enterprises to set default Copilot models for their teams. ^[2] GitHub Copilot Business and Copilot Enterprise now allow users to set their preferred GitHub Copilot model as the default for new conversations through enterprise-managed settings. ^[3] Content exclusion policies, first introduced in preview for GitHub.com in January 2025, allow administrators to specify files, directories, or path patterns that Copilot should ignore when generating outputs. ^[4] The latest update applies to users of Copilot Business and Copilot Enterprise, marking a significant step in addressing long-standing developer concerns around security and privacy. ^[5] GitHub stated that this content exclusion feature is available for Copilot Business and Copilot Enterprise customers. ^[6] The new feature prevents Copilot from using excluded files as context in agentic workflows to protect sensitive code. ^[7]