Several new capabilities for GitHub Copilot arrived in VS Code Insiders following announcements made at GitHub Universe 2025.
Highlights
- OpenAI Codex integration: Copilot Pro+ subscribers can now leverage OpenAI Codex directly within VS Code Insiders.
- Agent Sessions view: A unified interface enables developers to oversee both local and cloud-based agent sessions.
- Context-isolated sub-agents: Subagents allow you to assign specialized tasks—such as executing TDD workflows or performing research—independently from your primary chat conversation, optimizing token consumption through context separation.
- Plan Mode: This feature enables you to construct, refine, and carry out phased implementation strategies. Plan Mode examines your codebase, produces comprehensive execution strategies, and confirms that all requirements are satisfied before code development begins.
The complete feature set is documented in the full release notes.
The Insiders build operates independently alongside the monthly Stable release, allowing you to work with either version on the same system. This build mirrors what the VS Code development team uses in their daily work, and feedback from users testing new features is highly valued.
To update your Insiders build, launch VS Code Insiders, navigate to Help → Check for Updates, and restart when prompted.
Source: GitHub Blog