The @GitHub Research team released a “Rubber Duck” agent for the Copilot CLI…

Brief

The @GitHub Research team released a “Rubber Duck” agent for the Copilot CLI (announced in a tweet by @burkeholland on 2026-04-07) that automatically obtains a review from a model from a different AI family. The shared demo/video and their data claim this cross‑family review noticeably improves results, but the post gives no detailed metrics.

title: @burkeholland: The @GitHub Research folks released a "Rubber Duck" agent for the Copilot CLI.

Automatically get a ...
author: @burkeholland
contenttype: tweet
publication: Twitter/X
published: 2026-04-07T22:12:49+00:00
sourceurl: https://x.com/burkeholland/status/2041640366189748339

word_count: 40

The @GitHub Research folks released a "Rubber Duck" agent for the Copilot CLI.

Automatically get a review from a model from a different AI family.

And their data shows that yes, this does in fact help. Quite a bit.

Video