Compiler says OK. Runtime explodes anyway. Here are the 4 patterns where strict null checks isn't enough: assertion functions, untyped libraries, Prisma ORM, and JSON.parse — with real code from a Next.js/Prisma stack.
Jul 23 2026 · 8′ · Tutorials · Next.js · TypeScript
Zod sells itself as "define once, validate everywhere." In Next.js 16 with Server Actions, edge middleware, and API routes, that's only partially true. Three concrete failure modes and the pattern that prevents them.
Jun 13 2026 · 8′ · Tutorials · TypeScript · produccion
The most common mistake when implementing MCP tools is coupling them to the provider's SDK. The spec exists to prevent exactly that. A practical architecture guide: the input/output contract that makes a tool work across Claude, GPT, and local models without rewriting anything.
Jun 10 2026 · 8′ · Tutorials · TypeScript · LLM
Architecture, real systems, product decisions and technical lessons. Everything reviewed with my own judgment before it ships.
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