VS Code v1.117.0 Silently Injects GitHub Copilot as Git Co-Author — Even After Users Edit Commit Messages

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VS Code 1.117.0 (April 21) introduced a setting that automatically appends 'Co-authored-by: Copilot' to git commits when Copilot assists with commit message generation — even after users manually replace the generated text. The behavior persists invisibly in git history and CI output, triggering 37 HN points and a filed VS Code issue (#313064). Users can disable it via the 'Git Add AI Co Author' setting, but the opt-out default raised concerns about attribution integrity and consent.