Posts

The iterator return type loophole that existed since TypeScript 2.3 is finally closing. Learn how --strictBuiltinIteratorReturn affects code that relies on iterator protocol semantics and what breaks when you flip the switch.

Most React performance problems stem from misusing Context API as a state manager. This matters because the difference between dependency injection and state management determines whether your app scales or collapses under load.

Route Handlers replaced API Routes in Next.js 13+. Learn streaming responses, edge runtime constraints, and production patterns for webhooks, uploads, and SSE in 2026.

Most teams reach for useTransition by default, missing React's standalone startTransition export that unlocks concurrent scheduling outside components—in event handlers, third-party stores, and synchronous callbacks where hooks cannot exist.

Master Next.js App Router navigation by understanding when to use useRouter, redirect, and permanentRedirect. Learn the technical differences, performance implications, and real-world patterns that prevent runtime crashes and SEO penalties.

Most teams choose the wrong integration layer when building with Claude. The Claude Agent SDK ships with convenience tools that hide critical control points, while the raw Anthropic API exposes every token and state transition. This post maps the decision framework so you pick the right abstraction for your workload.

Most Claude Code security failures stem from misunderstanding where permission modes end and sandbox boundaries begin. This post breaks down the four modes, `--allowedTools` whitelisting, and how bubblewrap restrictions work together to prevent unauthorized access.

Most TypeScript type bugs stem from confusion between `object`, `{}`, and `Record<string, unknown>`. Each accepts radically different values. This post explains the actual behavior and shows when to use each type in production code.

The Next.js 16 Form component delivers native progressive enhancement for server actions. Learn when it replaces custom wrappers and when teams still need their own abstractions.

The after() API in Next.js enables non-blocking side effects that execute after the response completes. Learn when to use it, how it differs from alternatives, and the production tradeoffs that matter.

Most agentic workflow failures stem from naive model selection. Learn the deterministic rules for routing subagents to Haiku, Sonnet, or Opus based on task complexity, token throughput, and cost constraints.

Most TypeScript developers reach for Record by default, but Map provides runtime guarantees that static types cannot. Learn when each structure prevents bugs in production.