Overview
- VS Code will switch Copilot credit to opt-in in release 1.119, rolling back the default “Co-authored-by: Copilot” setting.
- Developers reported the line appeared even when Copilot was not used or was disabled, and some saw it added after they reviewed and edited the commit message.
- A commit trailer is a short metadata line in a Git commit that records authorship and becomes part of the permanent history.
- Reviewer Dmitriy Vasyura apologized for approving the change, said there was no ill intent, and said the rollback followed a bug in the feature.
- Other tools such as Anthropic’s Claude Code and OpenAI’s Codex add similar lines by default, which reporting notes can complicate IP claims and even insurance coverage for software projects.