--- title: "Rubber duck debugging in VS Code & GitHub Copilot CLI" url: https://daily.dev/posts/rubber-duck-debugging-in-vs-code-github-copilot-cli-peuibllel source_url: https://www.youtube.com/watch?v=r8zwd-RiBdM type: video:youtube source: "Visual Studio Code" published: 2026-06-05T14:27:18.750Z updated: 2026-06-05T14:27:37.804Z tags: ["github", "ai-agents", "vscode", "ai-coding"] reading_time: 16 upvotes: 1 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Rubber duck debugging in VS Code & GitHub Copilot CLI **[Visual Studio Code](https://daily.dev/sources/vscode)** · 16 min read · 1 upvotes · 0 comments ## Summary A live demo walkthrough of the 'rubber duck' feature in GitHub Copilot CLI, which automatically requests code reviews from a competing AI model family (e.g., GPT reviewing Claude's plan) at key boundaries like planning, implementation, and test generation. The presenter explains that combining Claude and GPT model families yields better results than using either alone — approximating ~75% of Opus performance using Sonnet plus GPT review at lower cost. The session also covers the REPL loop (called 'Ralph loop') concept, where an agent iteratively implements a PRD and stores learnings across iterations, and gives beginner tips for getting started with the Copilot CLI using plan mode and autopilot. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Rubber Duck in GitHub Copilot CLI](https://daily.dev/posts/rubber-duck-in-github-copilot-cli-h1kpggec0) · The Art of Simplicity · 1 upvotes · 1 comments - [Rubber Duck in GitHub Copilot CLI now supports more models](https://daily.dev/posts/rubber-duck-in-github-copilot-cli-now-supports-more-models-d96bkcovt) · GitHub Changelog · 1 upvotes · 0 comments --- Tags: [#github](https://daily.dev/tags/github), [#ai-agents](https://daily.dev/tags/ai-agents), [#vscode](https://daily.dev/tags/vscode), [#ai-coding](https://daily.dev/tags/ai-coding) [View this post on daily.dev](https://daily.dev/posts/rubber-duck-debugging-in-vs-code-github-copilot-cli-peuibllel)