Agent-created revert commits (git revert) are missing Co-authored-by / Copilot-Session trailers

[mwiemer-microsoft]

Describe the bug

When the agent in the Copilot desktop app creates a revert commit (via git revert), the commit is created without the configured commit trailers (Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> and Copilot-Session: <id>). Regular commits made by the agent in the same session include them.

Example

dotnet/roslyn@0234475

Commit message, in full:

Revert "Raise xUnit v3 CoreCLR test apphost stack reserve"

This reverts commit 61964a0ff57a0bde49d413147aa7e9e33bd02f02.

It has no Co-authored-by or Copilot-Session trailer.

Expected behavior

Revert commits the agent creates should get the same attribution trailers as other agent commits. git revert makes its own default message, so the agent probably needs to pass --edit/-m, or the trailers need to be added a different way (for example git revert --no-commit and then a commit that includes the trailers, or git commit --amend --trailer ...).

Related

• includeCoAuthoredBy: false is not inherited by task subagents; their commits still get the Co-authored-by trailer #4576 (trailer setting not inherited by subagents)
• copilot --resume can't use the Copilot-Session commit trailer id (it's the cloud mc_session_id, not the local session id) #4130 (Copilot-Session trailer id)
• Add Git commit attribution for AI-assisted code changes #975 (commit attribution)

Environment

• Copilot desktop app on Windows, CLI version 1.0.87-0