Live Coding with Wes Bos, Burke Holland, Pierce Boggan & Friends | GitHub Copilot Day
Join Wes Bos, Burke Holland, and Pierce Boggan for two hours of live coding with GitHub Copilot. Watch as the team takes a 3D foldable phone simulator from scratch to running functional web apps in real time. Learn how to manage parallel AI agents test features using built-in browser tools, and navigate multi-model options in the GitHub Copilot app. ▬▬▬▬▬▬ WANT TO LEARN MORE? 🚀 ▬▬▬▬▬▬ Learn more about HydraFusion https://gh.io/ghcpdayhydrafusion Get hands-on with the Copilot app https://gh.io/ghcpdaycopilotapp Check out Copilot app resources https://gh.io/ghcpdaycopilotappresources Install the GitHub Copilot CLI https://gh.io/ghcpdaycopilotcli Check out GitHub Copilot Dev Days! https://gh.io/join-dev-days ▬▬▬▬▬▬ TIMESTAMPS ⌚ ▬▬▬▬▬▬ 0:00 Welcome — two hours to build something 0:50 Introducing Wes Bos 1:36 The iPhone Duo 3D model backstory 2:52 The plan: exploded view + HTML in Canvas 3:16 First prompt: a knolling grid layout 4:28 What HTML in Canvas unlocks 5:42 Wes's HTML in Canvas skill 7:36 Steering the agent mid-loop 9:18 Matching the model to the task 10:07 Fixing pan and orbit controls 13:13 The calculator is taking too long 14:27 Adding a color picker and wallpapers 15:51 Hunting for the app preview 18:39 The calculator renders on the phone 19:48 Exploding the phone while the app runs 21:18 Wes hands off the challenge 22:56 Burke and Pierce take over 25:42 Blocked by the package proxy 27:22 Which models do you cook with? 29:15 New auto mode and optimization knobs 30:47 Why engineers pick one model and stay 33:14 Prompting a camera and photos app 34:03 Do you still plan? The prototype is the plan 35:32 Long-running agents and batching work 36:42 The camera app works on the first try 40:08 A GitHub app and an agent control plane 41:20 Why agents ask questions outside plan mode 43:25 Worktree, local, and cloud sessions 44:29 Why you'll need remote agents 46:04 Fanning out 50 sub-agents, one per app 48:20 Merging worktrees back to the main session 50:16 Designing for a foldable UI 51:44 The era of the idea 52:58 Anti-pattern: over-engineering your agent setup 54:07 Over-specified plans limit the model 55:44 Your local machine becomes the constraint 58:35 Agents writing their own acceptance tests 1:00:07 Why the web stack is winning for agents 1:01:19 Rubber-ducking and adversarial review 1:03:36 The GitHub app running on the simulator 1:05:52 Finally finding the right browser flag 1:10:22 Getting apps onto the 3D model 1:11:36 Telling the agent to stop adding apps 1:17:20 Computer use kicks in 1:22:00 Recap for anyone just joining 1:24:29 The GitHub app: repos, issues, and PRs 1:25:58 Apps finally render on the foldable 1:27:16 Designing for book, flat, and tent modes 1:31:02 Retained code: from 50% to 90% 1:32:32 When does everyone get this intelligence? 1:34:24 Do we still read the code? 1:35:30 The real bottleneck is your engineering system 1:37:24 Why reviewing every line isn't practical 1:39:21 Copilot SDK running inside the simulator 1:42:07 Pivot: an app store that builds on demand 1:43:18 How many AI credits did this cost? 1:44:04 Why max reasoning isn't always better 1:46:01 Is $25 an hour worth it? 1:47:36 How long this would have taken before 1:48:45 Saying no, and reading while the agent works 1:49:53 Isolation: multiple agents, multiple ports 1:51:23 Just ask Copilot to set up your machine 1:52:09 Nested sessions and the chief of staff pattern 1:54:06 Canvases that control the app 1:56:01 BYOK and why completions use custom models 1:57:28 The app store, live 1:58:32 Automations: daily dead code removal 2:00:12 Automations for meetings and message triage 2:02:12 Will apps be generated on demand? 2:03:43 Takeaways from GitHub Copilot Day 2:06:22 Wrap-up and what's coming at Universe #GitHubCopilot #GitHub #GitHubCopilotDay Stay up-to-date on all things GitHub by connecting with us: YouTube: https://gh.io/subgithub Blog: https://github.blog X: https://twitter.com/github LinkedIn: https://linkedin.com/company/github Insider newsletter: https://resources.github.com/newsletter/ Instagram: https://www.instagram.com/github TikTok: https://www.tiktok.com/@github About GitHub It’s where over 180 million developers create, share, and ship the best code possible. It’s a place for anyone, from anywhere, to build anything—it’s where the world builds software. https://github.com