Hey guys,
Welcome to another edition of Import React by Cosden Solutions!
This week we’re looking at the release of Next.js 15.4, a full breakdown of React state management, and a new Claude Code dashboard that’s making AI dev tools a little more measurable.
Plus, a fun story on crawling a billion web pages, InstantDB’s new agent-friendly backend API, and a thought-provoking post on writing code with “mental proofs.”.
Let's get into the newsletter! 🤙
⚡️ The Latest In React
🤖 Complete Guide to State Management in React
PropelAuth breaks down the core tools for managing state in React, starting from useState and working up to complex, global, persisted state. You’ll learn what hooks/libraries to reach for in common examples, how to avoid prop drilling, and how to maintain type safety while you do it. [ad]
⏭ Next.js 15.4 Release
Next.js 15.4 is here, which brings full production support for Turbopack builds. The release also previews upcoming features in Next.js 16, including Cache Components and improved client routing.
📖 React Zero to Hero (free book)
An interactive, free online book, ReactJS Z2H, by Dr. Alex Turner guiding learners from basic concepts to production-ready React development. It’s project-based, covering everything from JSX and state to hooks, advanced patterns, performance optimisations, testing, and deployment.
🧑💻 ShadCN UI Code Component Block
A developer on r/reactjs shared a custom code block component built for ShadCN UI’s registry, which currently lacks one. Installable with one line of code.
🧠 AI & General Programming
👀 Claude Code revenue jumps 5.5x as Anthropic launches analytics dashboard
Anthropic has launched a new analytics dashboard for its Claude Code AI assistant, giving engineering managers deeper insight into how their teams use the tool. It tracks metrics like code suggestion accept rates, user activity, and daily spend, key data for companies trying to measure ROI on AI investments.
🕷 Crawling a billion web pages in just over 24 hours, in 2025
In his latest blog post, Andrew Chan details how he crawled a billion web pages in just over 24 hours, something no one’s really broken down in years. With today’s hardware leaps, faster SSDs, more cores, and beefier network bandwidth, he revisits the question: what does it actually take to crawl the modern web? His experiment sheds light on shifting bottlenecks and whether bootstrapping your own Google is still a $41k endeavor.
🔎 How and where will agents ship software?
InstantDB says we’re heading into a new era of software engineering, one fueled by agents and LLMs. As more people build more apps, they’re releasing an API that gives both humans and AI agents access to full-stack backends, complete with databases, auth, file storage, and real-time sync. It’s built to scale fast and make high-level code easier to ship and review.
📈 To be a better programmer, write little proofs in your head
Matthew Prast suggests mentally sketching a proof for your code as you write it, a habit that’s tricky to build but pays off fast. Once it clicks, your code often just works right away. He dives into the idea of monotonic code, systems that always move forward, like checkpointed scripts that pick up where they left off instead of repeating steps.
Quick Links
How to Add Scroll-Aware Bottom Navigation in React Native?
I tried SolidJS as a React dev and here’s what I learned.
Am I Becoming Irrelevant?
The world’s longest React hooks migration.
5 things I learned from 5 years at Vercel.
See you next week!
Darius Cosden