--- title: Fast Focus: Dream a Little Dream: Dev with the CLI description: A conference lightning talk demos GitHub Copilot CLI end to end, building a to-do/fix-me scanner project live. Covers switching models (auto discount mode,... canonical: https://daily.dev/posts/fast-focus-dream-a-little-dream-dev-with-the-cli-omkp9plmj twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Fast Focus: Dream a Little Dream: Dev with the CLI | daily.dev og:description: A conference lightning talk demos GitHub Copilot CLI end to end, building a to-do/fix-me scanner project live. Covers switching models (auto discount mode,... og:url: https://daily.dev/posts/fast-focus-dream-a-little-dream-dev-with-the-cli-omkp9plmj og:image: https://api.daily.dev/og/posts/OMkP9PLmJ.png og:image:alt: Fast Focus: Dream a Little Dream: Dev with the CLI og:image:width: 1200 og:image:height: 630 og:locale: 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. # Fast Focus: Dream a Little Dream: Dev with the CLI **[Microsoft Developer](https://daily.dev/sources/microsoftdeveloper)** · 19 min read · 0 upvotes · 0 comments ## Summary A conference lightning talk demos GitHub Copilot CLI end to end, building a to-do/fix-me scanner project live. Covers switching models (auto discount mode, Claude Haiku 4.5, Claude Sonnet, GPT models, Gemini, Kimi, Microsoft's MAI), YOLO mode for auto-approving tool permissions, /init for generating copilot-instructions.md, plan mode for scoping features before code is written, autopilot (Ralph looping) and fleet mode for parallel sub-agents, managing context via /context, /compact, and disabling unused MCP servers, skills stored in the user or project copilot folder, and review tooling including /review, a security-focused review, and the multi-model 'rubber duck' review. The live demo itself hits a build issue near the end that isn't resolved on stage. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What does YOLO mode do in GitHub Copilot CLI? YOLO mode enables all tool call permissions automatically, so Copilot CLI can write files, access websites, and run commands without asking for confirmation each time. Normally the CLI prompts before each action like writing to a file; YOLO mode skips those prompts, which speeds up demos and automated workflows but removes the visibility into what the agent is doing. _Developers weighing agent autonomy against control can compare workflows and tips for coding agents on daily.dev._ ### What is fleet mode in GitHub Copilot CLI and how does it speed up builds? Fleet mode in GitHub Copilot CLI kicks off multiple sub-agents at once, each with its own context window, to work on separate tasks from a plan in parallel instead of serially. Each sub-agent completes its assigned task and reports a summary back to the main agent, which can significantly cut down build time on multi-step plans. _Anyone speeding up agentic coding workflows can follow parallel sub-agent techniques like this on daily.dev._ ### What is the rubber duck feature in GitHub Copilot CLI? Rubber duck is a code review feature in Copilot CLI that uses a different model than the one that wrote the code to critique it, available only on larger models from Anthropic and OpenAI, such as Claude Sonnet or GPT models. The two models effectively debate best practices and produce a combined resolution with fixes, giving a second, independent set of eyes on the code. _Developers deciding how to review AI-generated code can track new agent review features on daily.dev._ ## Similar posts on daily.dev - [Github Copilot on the command line \(continued\)](https://daily.dev/posts/github-copilot-on-the-command-line-continued--vmgk0uvla) · The Art of Simplicity · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#github](https://daily.dev/tags/github), [#ai-agents](https://daily.dev/tags/ai-agents), [#cli](https://daily.dev/tags/cli), [#claude](https://daily.dev/tags/claude) [View this post on daily.dev](https://daily.dev/posts/fast-focus-dream-a-little-dream-dev-with-the-cli-omkp9plmj) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Fast Focus: Dream a Little Dream: Dev with the CLI","url":"https://daily.dev/posts/fast-focus-dream-a-little-dream-dev-with-the-cli-omkp9plmj","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/fast-focus-dream-a-little-dream-dev-with-the-cli-omkp9plmj"},"datePublished":"2026-08-18T16:28:53.780Z","dateModified":"2026-09-14T09:33:13.735Z","description":"A conference lightning talk demos GitHub Copilot CLI end to end, building a to-do/fix-me scanner project live. 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