GitHub Copilot for JetBrains v1.19.0 Adds Enterprise-Managed Default Models and MCP Startup Control

GitHub Copilot for JetBrains v1.19.0 introduces enterprise-managed default models, allowing organizations to set any available Copilot agent model as the default for new conversations. The release also adds a Fix action in diagnostic intention menus, which uses Agent mode when available and Ask mode otherwise to request repairs. Users gain more control over MCP server startup, with the ability to disable automatic startup for Copilot and Claude while retaining manual Start and Restart options.

UX and Navigation Improvements

The update refines the user experience with several key changes:

• Chat Navigation: Messages are now grouped by conversation turns with quick navigation between them.
• Message Actions: New buttons allow users to copy and edit their messages.
• Account Management: Signed-in account controls feature clearer labels, simpler status displays, and a new Switch Account action.
• Sign-in Page: The Chat sign-in page has been redesigned with a responsive layout, clearer provider choices, and a direct link to Copilot plans.

Bug Fixes and Compatibility

Several stability issues were addressed, including IDE freezes when switching chat agent providers with large model lists and requests failing during Copilot language server startup. Fixes also cover worktree issues on Windows WSL projects and MCP server configuration in repository-root .mcp.json files.

Important Compatibility Note: Support for JetBrains IDE 2025.1 is ending. GitHub Copilot now requires JetBrains IDE 2025.2 or later.