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GitHub & open source news

Notable releases, project announcements and platform changes across open source.

GitHub & open source
GitHub Copilot App Gains Local Sandboxing in Public Preview
The GitHub Copilot app can now run local sessions in a sandbox that limits filesystem, network and credential access per project. Off by default, in public preview.
23 September 2026Source: GitHub changelog1 min read
GitHub & open source
Claude Opus 5.5 Arrives in GitHub Copilot for Pro+, Max, Business and Enterprise Plans
Anthropic's Claude Opus 5.5 joins GitHub Copilot's model picker on paid plans, billed at provider list pricing with a gradual rollout. Outputs carry a watermark.
23 September 2026Source: GitHub changelog1 min read