--- title: Runway's Solaris renders UI frame by frame, Margelo... description: Runway shipped Solaris, a system that generates working interfaces frame by frame with no HTML or pre-coded layouts behind it, and its own numbers claim users... canonical: https://daily.dev/posts/runway-s-solaris-renders-ui-frame-by-frame-margelo-joins-callstack-in-an-20m-deal-d5eh3xxgz twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Runway's Solaris renders UI frame by frame, Margelo joins Callstack in an €20M deal | daily.dev og:description: Runway shipped Solaris, a system that generates working interfaces frame by frame with no HTML or pre-coded layouts behind it, and its own numbers claim users... og:url: https://daily.dev/posts/runway-s-solaris-renders-ui-frame-by-frame-margelo-joins-callstack-in-an-20m-deal-d5eh3xxgz og:image: https://api.daily.dev/og/posts/D5Eh3xXGz.png og:image:alt: Runway's Solaris renders UI frame by frame, Margelo joins Callstack in an €20M deal 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. # Runway's Solaris renders UI frame by frame, Margelo joins Callstack in an €20M deal **[Web Digest](https://daily.dev/sources/webdev_digest)** · 4 min read · 0 upvotes · 0 comments ## Summary Runway shipped Solaris, a system that generates working interfaces frame by frame with no HTML or pre-coded layouts behind it, and its own numbers claim users preferred it over Claude-coded interfaces most of the time. Margelo, the team behind Nitro Modules and VisionCamera, is joining Callstack in a deal valued above €20 million, though the libraries stay open source. Vercel published data showing its design.md system cuts layout failures by 57% when agents generate on-brand pages. And a supply chain compromise in the keyv/cacheable packages this August is a reminder that your CI pipeline has more production authority than your browser ever will. ## Content **TLDR:** Runway shipped Solaris, a system that generates working interfaces frame by frame with no HTML or pre-coded layouts behind it, and its own numbers claim users preferred it over Claude-coded interfaces most of the time. Margelo, the team behind Nitro Modules and VisionCamera, is joining Callstack in a deal valued above €20 million, though the libraries stay open source. Vercel published data showing its design.md system cuts layout failures by 57% when agents generate on-brand pages. And a supply chain compromise in the keyv/cacheable packages this August is a reminder that your CI pipeline has more production authority than your browser ever will. --- ## Runway's Solaris generates UI without writing any code Solaris pairs Runway's Gen-4.5 video model with a language model to render interfaces frame by frame, straight from clicks and drags, skipping the design-to-code translation step entirely. Runway's internal testing claims users preferred it over a Claude Opus 5-coded interface in 61-71% of comparisons, though that's their own benchmark, not an independent one. Hugging Face's Thomas Wolf framed the tradeoff honestly: you lose predictability but gain adaptability, which is exactly the problem nobody's solved yet - a button that renders differently every time you load the page is either delightful or a support nightmare, and it probably depends on whether you're building a game or a banking app. Early access is open now ahead of a public launch. [Read more](https://daily.dev/posts/s4pwDTtql) ## Margelo joins Callstack in a deal valuing it above €20 million Margelo built Nitro Modules, VisionCamera, and react-native-mmkv, and now it's joining Callstack in a deal that puts its value above €20 million. Creator Marc Rousavy stays on to lead the open-source libraries, which will remain open source. It's the kind of consolidation worth watching if you depend on these packages, since roadmap decisions now run through a bigger org with a decade of enterprise React Native delivery behind it. [Read more](https://daily.dev/posts/GAygwKUb9) ## Vercel's design.md cuts agent-generated layout failures by 57% Vercel built design.md as a public file any coding agent (v0, Codex, Claude) can load to produce on-brand pages, but the interesting part is how they got there. A naive prompt port failed because models interpreted subjective design language inconsistently, so the team built a three-part system instead: guidance, a constrained public stylesheet, and an eval loop that turns human feedback into deterministic checks. Running seven fixed eval scenarios against Claude Opus 4.8 and Codex with GPT-5.5 showed 57% fewer known layout failures with design.md in place - a rare case of someone actually measuring whether their AI-guidance file works instead of just shipping it and hoping. [Read more](https://daily.dev/posts/jEgVhN9ey) ## The frontend pipeline is now a real attack surface, not just the browser A piece on frontend security argues that package installs, CI runners, and CDN publishing now carry real production authority, even while the browser stays sandboxed and untrusted. The August 2026 keyv/cacheable supply chain compromise is the case study: a malicious preinstall hook buried in a common eslint dependency chain harvested cloud and CI credentials. The recommendation is blunt - treat your repo, CI workflows, and publishing identities as trust boundaries, and stop handing out pipeline-wide access just because it's convenient. [Read more](https://daily.dev/posts/NlFyOpLo7) --- ## Also notable - **Cypress 16 halves image-heavy test load times:** HTTP/2 support, now on by default in Chromium browsers, dropped a 1,000-image benchmark from 3,896ms to 1,362ms, alongside a faster visibility check and stable browser memory management. [Read more](https://daily.dev/posts/wnAxuP61o) - **Hugging Face's WebGPU kernels beat ONNX Runtime Web by 2.57x:** The new @huggingface/kernels library ships 207 versioned, tested WebGPU kernels that ran 2.57x faster by geometric mean on an Apple M4 GPU, and over 10,000x faster on specific hard cases like a bilinear Einsum operation. [Read more](https://daily.dev/posts/aCMZ1w1Ld) - **An AI-generated size estimator was 83% wrong:** Sentry's Application Metrics exposed a video size estimator that factored in resolution instead of bitrate, and swapping to a simple bitrate-times-duration formula got it within about 5% accuracy. [Read more](https://daily.dev/posts/QHWYeDPs9) - **Safari drops mid-scroll touch gestures over a CSS filter transition:** A brightness filter animating on :active on an ancestor element forces Safari to detach and reattach the UIScrollView mid-touch, confirmed as WebKit bug 322849 and still open and unassigned. [Read more](https://daily.dev/posts/TNaUO9tCk) - **Astro sites cut build time 25% through caching and concurrency:** Astro Weekly #146 covers techniques for scaling sites past thousands of pages, plus a case study migrating a 924-page Webflow site to Astro with zero downtime and no SEO loss. [Read more](https://daily.dev/posts/202xEoFOM) --- Tags: [#security](https://daily.dev/tags/security), [#ai-coding](https://daily.dev/tags/ai-coding), [#react-native](https://daily.dev/tags/react-native), [#vercel](https://daily.dev/tags/vercel) [View this post on daily.dev](https://daily.dev/posts/runway-s-solaris-renders-ui-frame-by-frame-margelo-joins-callstack-in-an-20m-deal-d5eh3xxgz) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/runway-s-solaris-renders-ui-frame-by-frame-margelo-joins-callstack-in-an-20m-deal-d5eh3xxgz","headline":"Runway's Solaris renders UI frame by frame, Margelo joins Callstack in an €20M deal","text":"Runway shipped Solaris, a system that generates working interfaces frame by frame with no HTML or pre-coded layouts behind it, and its own numbers claim users preferred it over Claude-coded interfaces most of the time. 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