GitHub Copilot weekly releases — August 31
Claude Fable 5.1 reaches Copilot Pro+ and higher plans, Gemini 3.8 Flash expands further, and VS Code 1.136 adds an Agent Merge preview.
This week's GitHub Copilot changelog covers new model access, tighter content controls, and several VS Code updates.
- Claude Fable 5.1 is now available to Copilot Pro+, Max, Business, and Enterprise users.
- Gemini 3.8 Flash is rolling out to Copilot Pro, Pro+, Max, Business, and Enterprise users.
- The Copilot app and Copilot CLI now honor content exclusions, keeping sensitive code out of context across agentic workflows.
- The GitHub Copilot harness is now generally available in Copilot for JetBrains, for faster feature delivery and better code quality.
- VS Code 1.136 adds Agent Merge, in public preview, which gets a pull request ready to merge by resolving review feedback, failed checks, and merge conflicts.
- Multi-root workspace support is now experimental, bringing Copilot and Claude agent sessions to every folder in a workspace.
- Chat backgrounds are now experimental, letting users personalize the Agents window with built-in patterns or their own images.
- Chat sessions now organize related chats into a hierarchy and flag which ones need attention.


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