https://muszarski.com/en/blog/ Notes from building products: AI-assisted development, Lingui, performance and accessibility. en https://muszarski.com/en/blog/yws-lu-case-study/ https://muszarski.com/en/blog/yws-lu-case-study/ Case study: migrating a Next.js site with 3D to static Astro in one day with Claude Code. Lab Lighthouse on phones: 23-28 to 99-100. Fri, 09 Oct 2026 00:00:00 GMT case-study astro performance ai https://muszarski.com/en/blog/psychology-in-ux-and-frontend/ https://muszarski.com/en/blog/psychology-in-ux-and-frontend/ Scarcity, social proof, anchors, defaults and progress bars, built honestly in code, and where EU and Polish law draws the line on dark patterns. Wed, 07 Oct 2026 00:00:00 GMT design https://muszarski.com/en/blog/contact-form-on-a-static-site/ https://muszarski.com/en/blog/contact-form-on-a-static-site/ One Vercel Function next to a static Astro build: a message-first form, three bot checks, EmailJS from the server, no-JS support and one ESM bug. Tue, 06 Oct 2026 00:00:00 GMT astro accessibility privacy https://muszarski.com/en/blog/multilingual-astro-site-with-lingui/ https://muszarski.com/en/blog/multilingual-astro-site-with-lingui/ How this site serves English, Polish and Spanish from one static Astro build: locale routes, translated slugs, hreflang and a switch that keeps your page. Tue, 06 Oct 2026 00:00:00 GMT i18n astro https://muszarski.com/en/blog/hover-effects-on-phones/ https://muszarski.com/en/blog/hover-effects-on-phones/ Phones have no cursor. How this site gates hover with (hover: hover) and (pointer: fine) and gives every hover a tap, focus or scroll twin. Tue, 06 Oct 2026 00:00:00 GMT accessibility design https://muszarski.com/en/blog/web-cv-and-pdf-from-one-source/ https://muszarski.com/en/blog/web-cv-and-pdf-from-one-source/ My CV page and its PDFs in English, Polish and Spanish come from one TypeScript file: Playwright prints a designed A4 sheet, and a test fails on drift. Tue, 06 Oct 2026 00:00:00 GMT astro i18n accessibility https://muszarski.com/en/blog/lighthouse-scores-of-16-developer-portfolios/ https://muszarski.com/en/blog/lighthouse-scores-of-16-developer-portfolios/ Mobile Lighthouse, 3 runs each, on 16 well-known developer portfolios: 3D median 35.5, minimal 74.5. The method, the results and what the score misses. Tue, 06 Oct 2026 00:00:00 GMT performance accessibility https://muszarski.com/en/blog/shipping-a-mobile-app-alone/ https://muszarski.com/en/blog/shipping-a-mobile-app-alone/ How I built and shipped Linkoglot, an AI language app, alone: Expo, Supabase, RevenueCat, Lingui in 30 languages, and what both app stores ask for. Tue, 06 Oct 2026 00:00:00 GMT react i18n ai https://muszarski.com/en/blog/why-my-threejs-portfolio-was-slow-on-mobile/ https://muszarski.com/en/blog/why-my-threejs-portfolio-was-slow-on-mobile/ My old three.js portfolio scored 34 on mobile Lighthouse. What made it slow, and a checklist for a 3D site that stays fast on phones. Tue, 06 Oct 2026 00:00:00 GMT performance react accessibility https://muszarski.com/en/blog/case-study/ https://muszarski.com/en/blog/case-study/ Case study: why I swapped my 3D portfolio for a poster. The research, the sites I learned from, every version, and shaders that never get in the way. Mon, 05 Oct 2026 00:00:00 GMT case-study ai astro performance https://muszarski.com/en/blog/llm-wiki-project-memory-for-claude-code/ https://muszarski.com/en/blog/llm-wiki-project-memory-for-claude-code/ How I stop Claude Code from forgetting: a foldered markdown wiki, a routing table, a lessons file and three hooks that reload them after compaction. Mon, 05 Oct 2026 00:00:00 GMT ai claude-code https://muszarski.com/en/blog/astro-vs-nextjs-for-a-portfolio/ https://muszarski.com/en/blog/astro-vs-nextjs-for-a-portfolio/ When Astro fits a portfolio or landing page and when Next.js is the right call, with HTTP Archive Core Web Vitals data and this site's measurements. Mon, 05 Oct 2026 00:00:00 GMT astro performance react https://muszarski.com/en/blog/claude-code-skills-hooks-mcp-subagents/ https://muszarski.com/en/blog/claude-code-skills-hooks-mcp-subagents/ When to use CLAUDE.md, a skill, a hook, an MCP server or a subagent in Claude Code: the official docs, plus the real setup that built this site. Mon, 05 Oct 2026 00:00:00 GMT ai claude-code https://muszarski.com/en/blog/cookieless-analytics-in-the-eu/ https://muszarski.com/en/blog/cookieless-analytics-in-the-eu/ Cookieless is not automatically consent-free. What GDPR and art. 399 of Poland's electronic communications law say, and three positions you can defend. Mon, 05 Oct 2026 00:00:00 GMT privacy https://muszarski.com/en/blog/fit-text-to-width-at-build-time/ https://muszarski.com/en/blog/fit-text-to-width-at-build-time/ How my name runs edge to edge on this site with no JavaScript: font metrics measured at build time, the wdth axis, cqi units and font-stretch. Mon, 05 Oct 2026 00:00:00 GMT typography performance design https://muszarski.com/en/blog/lingui-vs-i18next/ https://muszarski.com/en/blog/lingui-vs-i18next/ Lingui and i18next compared from their docs and npm data: message format, macros, compile step, bundle size, plurals, TypeScript and React Native. Mon, 05 Oct 2026 00:00:00 GMT i18n react https://muszarski.com/en/blog/reduced-motion-and-a-pause-button/ https://muszarski.com/en/blog/reduced-motion-and-a-pause-button/ How this site handles motion: a WCAG 2.2.2 pause control, prefers-reduced-motion, loops that stop offscreen and reveals that never hide content. Mon, 05 Oct 2026 00:00:00 GMT accessibility design https://muszarski.com/en/blog/translate-lingui-catalogs-with-an-llm/ https://muszarski.com/en/blog/translate-lingui-catalogs-with-an-llm/ How to machine-translate Lingui .po catalogs with an LLM, what breaks (placeholders, plurals, tone) and the checks to run before a catalog ships. Mon, 05 Oct 2026 00:00:00 GMT i18n ai