Pasting a Claude or DeepSeek API key straight into your code "just to test it quick" leaves a trail in your git history and your logs. A no-nonsense guide to environment variables, rotation, and what to check before sharing a repo.
Sep 09 2026 · 7′ · Tutorials · nextjs · anthropic
The Server Action resolves, the toast says "saved," and the UI still shows the old data for a beat. That beat is the gap setQueryData closes without waiting for the full server roundtrip.
Sep 08 2026 · 7′ · Tutorials · Next.js · React
After showing how a native union type replaces Either and Option in most cases, now comes the uncomfortable part: saying where fp-ts actually wins. It's not everywhere, and that's the point.
Sep 08 2026 · 7′ · Tutorials · TypeScript · node.js
The difference between npm and pnpm isn't install speed. It's a different storage model — content-addressable store vs a folder tree — and that model matters based on project size, not on what's trendy.
Aug 29 2026 · 8′ · Tutorials · Next.js · pnpm
Server Actions in Next.js 16 App Router makes mutations dead simple without writing an endpoint. But when you need client-side cache, optimistic revalidation, or reactive data shared across components, that's where Server Actions falls short — and TanStack Query steps in to solve that, not to replace it.
Aug 17 2026 · 8′ · Tutorials · TypeScript · app-router
Cline can create files, run commands, and open the browser autonomously from inside VS Code. That sounds like productivity. It also smells like risk if you haven't thought through the permissions before you start. My thesis: the mental model matters more than the tool.
Aug 17 2026 · 9′ · Tutorials · TypeScript · LLM
I wrote about fp-ts this week and was left with an uncomfortable doubt: did I really need all that machinery? A look at when a native discriminated union solves the same problem as Either/Option without the learning curve.
Aug 14 2026 · 7′ · Tutorials · TypeScript · arquitectura de software
Path aliases look innocent until the production build fails with no clear message. I documented the 3 most common breakage cases in a monorepo with Next.js 16 App Router and strict TypeScript, and the config pattern that survived.
Aug 14 2026 · 9′ · Tutorials · TypeScript · pnpm
fp-ts is a university, not a production framework for most teams. But ignoring it completely means leaving genuinely valuable concepts on the table. An honest walkthrough of Option, Either, and pipe from the perspective of strict TypeScript in the real world — plus the uncomfortable question of whether you actually need it.
Aug 07 2026 · 10′ · Tutorials · Next.js · TypeScript
Architecture, real systems, product decisions and technical lessons. Everything reviewed with my own judgment before it ships.
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