André Simões
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andrejnsimoes.com
André Simões
@andrejnsimoes.com
51 followers 280 following 180 posts
Staff Engineer | JNation Organizer
https://teklinks.andrejnsimoes.com/
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andrejnsimoes.com
Agentic Engineering in Action
In this session, Mitchell Hashimoto walks Richard Feldman through his approach to using AI when building Ghostty. Specifically they went through this recent commit in detail. You can watch their chat on YouTube or read below for some selected quotes.
teklinks.andrejnsimoes.com
July 8, 2025 at 12:21 PM
andrejnsimoes.com
Proof of Human. Creating the invisible Turing Test for the Internet
Proof of Human. Creating the invisible Turing Test for the Internet AI systems have detectable behavioral signatures that can be used to improve bot detection. Roundtable's Proof-of-Human API verifies proof-of-human invisibly, continuously, and instantaneously.
teklinks.andrejnsimoes.com
July 7, 2025 at 7:49 AM
andrejnsimoes.com
React Still Feels Insane And No One Is Talking About It
Recently, I did a side project that I wrote about in the other post. As part of it, I had what was supposed to be just a few paragraphs on how React sucks - but I just couldn't stop writing about it.
teklinks.andrejnsimoes.com
July 7, 2025 at 7:49 AM
andrejnsimoes.com
Progressive JSON
Do you know about Progressive JPEGs? Here’s a nice explanation of what a Progressive JPEG is. The idea is that instead of loading the image top to bottom, the image instead is fuzzy at first and then progressively becomes more crisp. What if we apply the same idea to transferring JSON?
teklinks.andrejnsimoes.com
July 3, 2025 at 11:40 PM
andrejnsimoes.com
The State of React and the Community in 2025
Detailed thoughts on how React has been developed over time, and explanations for common community confusion and concerns Introduction 🔗︎ Today, the state of React and its ecosystem is complicated and fractured, with a mixture of successes, skepticism, and contention.
teklinks.andrejnsimoes.com
June 30, 2025 at 9:31 AM
andrejnsimoes.com
`document.currentScript` is more useful than I thought.
Every so often, I stumble across a well-established JavaScript API in the browser that I probably should've known about years ago. Examples include the window.screen property and the CSS.supports() method. To my relief, I've realized I'm not always alone in my ignorance.
teklinks.andrejnsimoes.com
June 30, 2025 at 9:31 AM
andrejnsimoes.com
How does Kafka know what was the last message it processed? Deep dive into Offset Tracking
Let’s say it’s Friday. Not party Friday, but Black Friday. You’re working on a busy e-commerce system that handles thousands of orders per minute. Suddenly, the service responsible for billing processing crashes. Until it recovers, new orders are piling up.
teklinks.andrejnsimoes.com
June 30, 2025 at 9:31 AM
andrejnsimoes.com
Connect any React application to an MCP server in three lines of code
You can deploy a remote Model Context Protocol (MCP) server on Cloudflare in just one-click. Don’t believe us? Click the button below.
teklinks.andrejnsimoes.com
June 27, 2025 at 10:03 AM
andrejnsimoes.com
How we built our multi-agent research system
Claude now has Research capabilities that allow it to search across the web, Google Workspace, and any integrations to accomplish complex tasks.
teklinks.andrejnsimoes.com
June 27, 2025 at 10:03 AM
andrejnsimoes.com
On How Long it Takes to Know if a Job is Right for You or Not
A few eagle-eyed readers have noticed that it’s been 4 weeks since my last entry in what I have been thinking of as my “niblet series” — one small piece per week, 1000 words or less, for the next three months. This is true.
teklinks.andrejnsimoes.com
June 26, 2025 at 8:12 AM
andrejnsimoes.com
A short history of web bots and bot detection techniques
Did you know your favorite website can detect when you’re browsing it in public transport and when you scroll it laying in your bed? Today we’ll learn how they can do it and how this info is used to fight bots.
teklinks.andrejnsimoes.com
June 26, 2025 at 8:12 AM
andrejnsimoes.com
Want to Be a Better Frontend Engineer? Try a Week On-Call
You’re going to hate me for saying this, but I actually like being on-call. I know. I know. But hear me out. Obviously not the part where PagerDuty yanks you out of a dream with your heart pounding. But on-call taught me more about frontend quality than any bug tracker ever did.
teklinks.andrejnsimoes.com
June 22, 2025 at 11:36 AM
andrejnsimoes.com
Jest 30: Faster, Leaner, Better
Today we are happy to announce the release of Jest 30. This release features a substantial number of changes, fixes, and improvements. While it is one of the largest major releases of Jest ever, we admit that three years for a major release is too long.
teklinks.andrejnsimoes.com
June 20, 2025 at 5:18 PM
andrejnsimoes.com
ai agents
I'm using agents to write a lot of code now. Just 6 months ago it didn't really work well, so if you haven't tried in a while, this is your sign. Let me explain practically how I've been using them, where they still kind of suck, and what tools I've had success with.
teklinks.andrejnsimoes.com
June 20, 2025 at 5:18 PM
andrejnsimoes.com
My AI Skeptic Friends Are All Nuts
Tech execs are mandating LLM adoption. That’s bad strategy. But I get where they’re coming from. Some of the smartest people I know share a bone-deep belief that AI is a fad — the next iteration of NFT mania.
teklinks.andrejnsimoes.com
June 20, 2025 at 5:18 PM
andrejnsimoes.com
Search Params Are State
Search params have been historically treated like second-class state. They're global, serializable, and shareable — but in most apps, they’re still hacked together with string parsing, loose conventions, and brittle utils. This works, but it’s manual and repetitive.
teklinks.andrejnsimoes.com
June 13, 2025 at 11:24 AM
andrejnsimoes.com
How Imports Work in RSC
React Server Components (RSC) is a programming paradigm that lets you express a client/server application as a single program spanning over two environments.
teklinks.andrejnsimoes.com
June 13, 2025 at 11:24 AM
andrejnsimoes.com
The Underestimated Power of Hot Spots and Notes in EventStorming
I've been facilitating the EventStorming sessions for years now, and something keeps catching my attention.
teklinks.andrejnsimoes.com
June 13, 2025 at 11:24 AM
andrejnsimoes.com
How we built our AI code review agent for IDEs
Learn how we redesigned our pipeline to create an AI code review tool for instant IDE reviews, cutting time-to-first-comment by ~90%.
teklinks.andrejnsimoes.com
June 12, 2025 at 9:25 AM
andrejnsimoes.com
Announcing Vitest 3.2
Vitest 3.2 focuses on improvements to Browser Mode and TypeScript support. This release also includes some new useful methods, config options and deprecates the workspace config in favour of projects. In an effort to simplify the configuration, the team decided to deprecate the separate vitest.
teklinks.andrejnsimoes.com
June 12, 2025 at 9:25 AM
andrejnsimoes.com
Is It JavaScript?
OH: It’s just JavaScript, right? I know JavaScript. “It’s Just JavaScript!” is probably a phrase you’ve heard before. I’ve used it myself a number of times.
teklinks.andrejnsimoes.com
June 12, 2025 at 9:25 AM
andrejnsimoes.com
JavaScript's upcoming Temporal API and what problems it will solve
JavaScript will soon have a new feature that many developers are eagerly awaiting. The feature is the Temporal API which will fix many problems and inconveniences of the old Date object.
teklinks.andrejnsimoes.com
June 9, 2025 at 7:03 PM
andrejnsimoes.com
The Ingredients of a Productive Monorepo
So! Suppose you’re an intrepid engineer in a nascent Developer Productivity team. Your engineering organization has decided that it wants to move towards a monorepo.
teklinks.andrejnsimoes.com
June 9, 2025 at 7:03 PM
andrejnsimoes.com
Nine Emerging Developer Patterns for the AI Era
Yoko Li
teklinks.andrejnsimoes.com
June 8, 2025 at 9:04 PM
andrejnsimoes.com
A Look Into the Secrets of MCP: The New Secret Leak Source
The Model Context Protocol (MCP) is one of the latest advancements in the field of Agentic AI.
teklinks.andrejnsimoes.com
June 8, 2025 at 9:04 PM