The Pragmatic Engineer

<p>Today’s issue of The Pulse focuses on a single event because it’s a significant one with major potential ripple effects. On Tuesday, Cloudflare shocked the dev world by announcing that they have rewritten <a href="http://next.js">Next.js</a> in just one week, with a single developer who used only $1,100 in tokens:</p><div class="captioned-image-container"><figure><a class="image-link image2 is-viewable-img" target="_blank" href="https://substackcdn.com/image/fetch/$s_!mw9G!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png" data-component-name="Image2ToDOM"><div class="image2-inset"><picture><source type="image/webp" srcset="https://substackcdn.com/image/fetch/$s_!mw9G!,w_424,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 424w, https://substackcdn.com/image/fetch/$s_!mw9G!,w_848,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 848w, https://substackcdn.com/image/fetch/$s_!mw9G!,w_1272,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 1272w, https://substackcdn.com/image/fetch/$s_!mw9G!,w_1456,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 1456w" sizes="100vw"><img src="https://substackcdn.com/image/fetch/$s_!mw9G!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png" width="1186" height="1342" data-attrs="{&quot;src&quot;:&quot;https://substack-post-media.s3.amazonaws.com/public/images/b41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png&quot;,&quot;srcNoWatermark&quot;:null,&quot;fullscreen&quot;:null,&quot;imageSize&quot;:null,&quot;height&quot;:1342,&quot;width&quot;:1186,&quot;resizeWidth&quot;:null,&quot;bytes&quot;:null,&quot;alt&quot;:null,&quot;title&quot;:null,&quot;type&quot;:null,&quot;href&quot;:null,&quot;belowTheFold&quot;:false,&quot;topImage&quot;:true,&quot;internalRedirect&quot;:null,&quot;isProcessing&quot;:false,&quot;align&quot;:null,&quot;offset&quot;:false}" class="sizing-normal" alt="" srcset="https://substackcdn.com/image/fetch/$s_!mw9G!,w_424,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 424w, https://substackcdn.com/image/fetch/$s_!mw9G!,w_848,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 848w, https://substackcdn.com/image/fetch/$s_!mw9G!,w_1272,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 1272w, https://substackcdn.com/image/fetch/$s_!mw9G!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb41a84da-637a-4fde-b7fd-c2adbf751431_1186x1342.png 1456w" sizes="100vw" fetchpriority="high"></picture><div class="image-link-expand"><div class="pencraft pc-display-flex pc-gap-8 pc-reset"><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container restack-image"><svg role="img" width="20" height="20" viewBox="0 0 20 20" fill="none" stroke-width="1.5" stroke="var(--color-fg-primary)" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg"><g><title></title><path d="M2.53001 7.81595C3.49179 4.73911 6.43281 2.5 9.91173 2.5C13.1684 2.5 15.9537 4.46214 17.0852 7.23684L17.6179 8.67647M17.6179 8.67647L18.5002 4.26471M17.6179 8.67647L13.6473 6.91176M17.4995 12.1841C16.5378 15.2609 13.5967 17.5 10.1178 17.5C6.86118 17.5 4.07589 15.5379 2.94432 12.7632L2.41165 11.3235M2.41165 11.3235L1.5293 15.7353M2.41165 11.3235L6.38224 13.0882"></path></g></svg></button><button tabindex="0" type="button" class="pencraft pc-reset pencraft icon-container view-image"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-maximize2 lucide-maximize-2"><polyline points="15 3 21 3 21 9"></polyline><polyline points="9 21 3 21 3 15"></polyline><line x1="21" x2="14" y1="3" y2="10"></line><line x1="3" x2="10" y1="21" y2="14"></line></svg></button></div></div></div></a><figcaption class="image-caption"><em>Cloudflare CTO Dane Knecht <a href="https://x.com/dok2001/status/2026386974580330830?s=20">on X</a></em></figcaption></figure></div><p>There are several layers to dig into h…</p>

An engineer at Cloudflare rewrote most of Vercel’s Next.js in one week with AI agents. It looks like a sign of how AI will disrupt existing moats and business models. Analysis

Cloudflare

Vercel

Industry trends

Open source

Gergely Orosz

The Pulse: Cloudflare rewrites Next.js as AI rewrites commercial open source

'SF Pro Display', -apple-system, system-ui, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'

Today’s issue of The Pulse focuses on a single event because it’s a significant one with major potential ripple effects. On Tuesday, Cloudflare shocked the dev world by announcing that they have rewritten Next.js in just one week, with a single developer who used only $1,100 in tokens: