GitHub Copilot CLI adds Rubber Duck review agent

GitHub has introduced an experimental Rubber Duck mode in the GitHub Copilot CLI. The latest addition to the AI-powered coding tool uses a second model from a different AI family to provide a second opinion before enacting the agent’s plan. The new feature was announced April 6. Introduced in experimental mode, Rubber Duck leverages a second model from a different AI family to act as an independent reviewer, assessing plans and work at the moments where feedback matters most, according to Git...