GitHub Desktop 3.6 Ships Git Worktrees and Copilot-SDK Commit/Merge Authoring

GitHub Changelog·high signal

GitHub Desktop 3.6 (released June 26, 2026, macOS + Windows) adds native Git worktree support so you can run multiple branches—and parallel coding-agent sessions—without stashing or re-cloning. Commit-message authoring and AI-assisted merge-conflict resolution now run on the Copilot SDK and read your .github/copilot-instructions.md and AGENTS.md so generated messages match repo conventions. This bakes the agent-worktree workflow into a mainstream GUI rather than leaving it CLI-only.