Three wired GitHub Actions workflows for test, build, deploy. The caching pattern that halves CI time, plus 5 YAML traps that break teams.
React Compiler is stable in React 19. 3 memoization habits to delete, 2 cases where you still need useMemo, and the eslint plugin to run first.
CSS content-visibility skips rendering off-screen elements. 3 production patterns, the contain-intrinsic-size gotcha, and how to prove the gain.
TypeScript types vanish at runtime. Here are three boundaries — APIs, forms, config — where they fail, and Zod patterns that fix them.
Drizzle vs Prisma 2026: real bundle sizes for edge, performance in context, migration cost math, and when not to switch. Decide in 3 minutes.
5 non-coding behaviors that decide your first 90 days as a developer — from a hiring manager who's watched 20+ devs thrive or vanish.
React performance optimization driven by Profiler patterns. Three flame chart problems, three targeted fixes, and one popular optimization that backfires.
Three copy-paste configs for your eslint flat config migration — React+Vite, Node API, monorepo — plus the CI-breaking pattern no one warns you about.
Three Node.js stream patterns — file transform, HTTP proxy, CSV parser — that process GBs in ~40MB of RAM, with heap proofs and the pipeline() trap explained.
Three before/after refactors showing how CSS light-dark() deletes duplicated :root variables, prefers-color-scheme blocks, and theme toggle hacks.