The Download: Stacked PRs on GitHub, an escaped AI model, and pixel art NYC

Stacked pull requests are now in public preview on GitHub, making it easier to break large changes into reviewable layers. In this episode of The Download, we also cover a security incident where an OpenAI test model broke out of its sandbox and accessed Hugging Face servers. Plus, explore Isometric NYC, a pixel art map of New York City built using 3D tiles and image generation models. Check out the links below to learn more and try stacked PRs today. #PullRequest #AI #OpenAI — RESOURCES — Stacked pull requests on GH: https://github.blog/changelog/2026-07-30-stacked-pull-requests-are-now-in-public-preview/ OpenAI/Hugging Face: https://openai.com/index/hugging-face-model-evaluation-security-incident/ Isometric NYC on GH: https://github.com/cannoneyed/isometric-nyc Isometric NYC write-up: https://cannoneyed.com/projects/isometric-nyc — CHAPTERS — 00:00 Introduction 00:35 Stacked pull requests in public preview 01:56 OpenAI model escapes sandbox to hack Hugging Face 04:31 Isometric NYC: building a pixel art map with AI 06:54 Key takeaways on AI tools 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