GitHub’s August 31 Copilot weekly release is less about one headline feature and more about day-to-day control: which models you can pick, what code agents are allowed to see, and how VS Code helps get pull requests over the finish line.
Here is what matters if you write code with Copilot or VS Code agents.
What changed
More model choice in Copilot
- Claude Fable 5.1 is available for Copilot Pro+, Max, Business, and Enterprise.
- Gemini 3.8 Flash is rolling out across Pro, Pro+, Max, Business, and Enterprise.
Stronger content exclusions
- Copilot app and Copilot CLI now honor content exclusions, so sensitive paths stay out of agent context.
JetBrains
- The Copilot harness is generally available in JetBrains, aimed at faster feature delivery and better code quality.
VS Code 1.136
- Agent Merge (public preview): helps prepare a PR by working through review feedback, failed checks, and merge conflicts.
- Multi-root workspaces (experimental): agent sessions can span every folder in a multi-root workspace.
- Chat backgrounds and hierarchical chat sessions are also in the experimental/preview mix for organizing agent work.
Why it matters
If your team already uses content exclusions in the IDE, those rules now matter more for Copilot app and CLI agent workflows. That closes a common gap where local editor rules and CLI/app behavior drifted apart.
Agent Merge is the practical one for busy repos: less time bouncing between comments, CI failures, and conflict markers before a merge.
Who should care
- Developers on Copilot Pro and above who want newer models
- Teams that rely on content exclusions for private or regulated code
- Anyone using VS Code agent sessions on multi-folder workspaces or PR cleanup
Related guide
If you are still building baseline Python skills that agents often assume you understand, start with Python Iterators: Using iter() and next() with Paginated Data.
Source
Full details: GitHub Copilot weekly releases — August 31
