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The most common errors when building apps with Claude
Seven mistakes we see repeatedly in production Claude apps. Some cost you tokens, some cost you money, one or two can cost you the company. Each one has a simple fix.
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Field notes on AI-native products, design systems, web engineering, SaaS economics and modern infrastructure. New articles every week, sources included.
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Infrastructure and SEO
GEO KPIs in 2026: Citation Rate, Mention Rate, Position
Citation rate, mention rate, position: the three GEO KPIs worth tracking in 2026. Everything else is a dashboard moving without meaning.
Business and Scale
How to write an RFP for software that attracts the right vendors
73% of RFPs fail on scope misalignment. The 8-section structure that filters out wrong-fit software vendors before you open a proposal.
Web Design and Engineering
Core Web Vitals on Next.js in 2026: how to ship green
Concrete steps to hit Good on LCP under 2.5s, INP under 200ms, and CLS under 0.1 on a Next.js 16 SaaS, plus how to read field data when Lighthouse lies.
Product Design
Functional UI animation in 2026: the checklist before it ships
The 7 do, 7 don't checklist we apply on every product we ship: durations from 100 to 500ms, opacity and transform only, prefers-reduced-motion honored at the root.
AI and Automation
Claude Code skills: when to use them and when they pile up as overhead
Skills load on demand and cost 75-150 tokens each in the listing. Use them for procedures over five lines. Skip them for project-wide rules.
Business and Scale
Where to find a SaaS design partner in 2026: 6 places that work
Six channels actually surface SaaS design partners worth hiring in 2026. Three channels waste two weeks. Here is the map, in order of signal.
Infrastructure and SEO
Cloudflare R2 vs Supabase Storage: when to add R2 in 2026
You already run Supabase. Its Storage egress runs $0.03 to $0.09 per GB, R2 charges zero. Here is the line where adding Cloudflare R2 pays off in 2026.
Web Design and Engineering
Immersive web stack in 2026: Lenis, GSAP, and what to skip
Lenis (3 kB), GSAP free since April 2025, ScrollTrigger for scroll math, and native CSS scroll-driven animations. The 2026 stack we ship in production.
Infrastructure and SEO
Upstash Redis: the 5 patterns we use in every SaaS in 2026
Rate limiting, sessions, cache-aside, distributed locks, and QStash queues. The five Upstash Redis patterns we wire into every SaaS, with real cost math.
Web Design and Engineering
TypeScript strict mode: the 8 settings we never turn off
TypeScript's strict: true flag turns on 8 separate checks. Most codebases keep strict on at the root and quietly disable one or two of them inside a problem file. Here is each of the 8, what it catches in production, and the three flags outside the bundle that we still turn on for every project.
AI and Automation
AI integration agency in 2026: what their pitch should actually contain
An AI integration agency pitch in 2026 is judged on three things: what gets deployed, how it gets measured, and how it gets handed back. Ten checks to listen for, five red flags to walk out on.
AI and Automation
12 mistakes we see teams make building their first multi-agent ops system
Multi-agent LLM systems fail in production at 41 to 86 percent. Most of the failures trace back to twelve specific decisions teams make in the first month. Here is what they look like and how to undo them.
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