https://jankoritak.com/blog Notes on web engineering, debugging, Next.js, and building with AI. en https://jankoritak.com/blog/fixing-a-voice-agent-using-karpathy-s-autoresearch-blueprint https://jankoritak.com/blog/fixing-a-voice-agent-using-karpathy-s-autoresearch-blueprint Fri, 17 Apr 2026 00:00:00 GMT A production voice agent silently degraded due to model drift. The fix: an eval harness plus an autonomous autoresearch loop that took it from 3/14 to 13/13 passing — and 5,234ms to 1,180ms. https://jankoritak.com/blog/the-birth-of-the-ai-powered-agency-client https://jankoritak.com/blog/the-birth-of-the-ai-powered-agency-client Tue, 19 Aug 2025 00:00:00 GMT AI collapsed discovery and prototyping from weeks to hours — so clients now arrive with code, not just ideas. Here's how the tech-agency engagement, and its risks like earlier technical debt, is changing. https://jankoritak.com/blog/server-components-vs-ssr-in-nextjs https://jankoritak.com/blog/server-components-vs-ssr-in-nextjs Wed, 26 Apr 2023 00:00:00 GMT SSR and React Server Components look similar but differ fundamentally: SSR outputs request-time HTML, RSC outputs a streamable JSON-like format per component. Here's how they compare and combine in Next.js. https://jankoritak.com/blog/hunting-down-regression-using-git-bisect https://jankoritak.com/blog/hunting-down-regression-using-git-bisect Mon, 27 Mar 2023 00:00:00 GMT git bisect finds the exact commit that introduced a regression using binary search — give it a known-good and a known-bad commit and it pinpoints the culprit in ~log2(n) steps. https://jankoritak.com/blog/z-index-not-working-debug-it-the-modern-way https://jankoritak.com/blog/z-index-not-working-debug-it-the-modern-way Wed, 15 Mar 2023 00:00:00 GMT z-index not working? Debug it visually with MS Edge DevTools' 3D View — see stacking contexts and z-index values in 3D instead of digging through the Elements panel. https://jankoritak.com/blog/so-why-server-components https://jankoritak.com/blog/so-why-server-components Sat, 17 Dec 2022 00:00:00 GMT Why render React components on the server? Server Components address five client-component limits: long TTI, bundle bloat, request waterfalls, a single thread, and no server-API access. https://jankoritak.com/blog/how-to-prevent-flash-of-invisible-text-with-webfonts https://jankoritak.com/blog/how-to-prevent-flash-of-invisible-text-with-webfonts Fri, 10 Jun 2022 00:00:00 GMT Lighthouse warns 'Ensure text remains visible during Webfont load'? Add font-display: swap to your @font-face so the browser shows a fallback font instead of hiding text (FOIT). https://jankoritak.com/blog/how-to-prevent-cumulative-layout-shift-for-responsive-images https://jankoritak.com/blog/how-to-prevent-cumulative-layout-shift-for-responsive-images Fri, 03 Jun 2022 00:00:00 GMT Lighthouse warns 'image elements do not have explicit width and height'? Add width + height attributes alongside responsive CSS so the browser reserves space via aspect-ratio and avoids CLS.