Rohan Jalil

React 19.3 Fragment refs give you a FragmentInstance for events, focus, observers and scrolling across a Fragment’s DOM children, with no wrapper div.

LangChain 1.4 moves MCP into langchain.mcp. We trace MCPAdapter’s real source, the interrupt-driven elicitation loop, and how tool errors reach the model.

Learn how React 19.3 browser() handles browser-only React components during SSR using use(), Suspense, hydration and intentional server bailouts.

Learn how Next.js 16.3 Instant Navigations use Partial Prefetching, App Shells, Suspense, use cache, and Playwright tests to make App Router navigation instant.

Learn how to monitor Laravel, Django, Rails, NestJS and Next.js applications, including requests, queues, tasks, databases, APIs, errors and business metrics.

Tokens are the units an LLM reads and bills by. How tokenization works, how it fills the context window, and what drives token costs up.

An AI sales agent makes 400-600 calls a day for $3,000-$5,000 a month. How it compares to a human SDR on cost, meetings and payback.

How Laravel 13 vector search really works, from whereVectorSimilarTo down to the pgvector SQL, plus the HNSW filtering bug that silently thins your results.

A 10-point framework for choosing an AI development partner: red flags, questions to ask, and how to tell real production AI work from marketing claims.

Realistic 2026 budgets for AI projects, based on 250+ projects we’ve delivered since 2014: what each type costs to build and run after launch.