What’s new with GitHub Copilot coding agent
GitHub Copilot coding agent now includes a model picker, self-review, built-in security scanning, custom agents, and CLI handoff. Here’s what’s new and how to use it.
Say Cheese! Meet SmashingConf Amsterdam 🇳🇱 — Smashing Magazine
Meet our brand new conference for designers and UI engineers who love the web. That’s [SmashingConf Amsterdam](https://smashingconf.com/amsterdam-2026), taking place in the legendary Pathé Tuschinski, on April 13–16, 2026.
New to the web platform in February
Discover some of the interesting features that have landed in stable and beta web browsers during February 2026.
An Exploit ... in CSS?!
Read an explanation of the recent CVE-2026-2441 vulnerability that was labeled a "CSS exploit" that "allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page."
Quick Hit #103
Firefox 148 makes shape() available without a flag, aligning with Chrome and Safari.
A Complete Guide to Bookmarklets
Browsers don't just let you bookmark web pages. You can also bookmark JavaScript, allowing you to do so much more than merely save pages.
The generative recommender behind Shopify's commerce engine (2026) - Shopify
From raw event sequences to real-time predictions: what it took to build and ship a generative recommender at commerce scale.
How OpenEvidence built a healthcare AI that physicians actually trust
How we rebuilt Next.js with AI in one week
One engineer used AI to rebuild Next.js on Vite in a week. vinext builds up to 4x faster, produces 57% smaller bundles, and deploys to Cloudflare Workers with a single command.
Create your PostgreSQL clusters with the "builtin" C collation!
Read my plea for using the C collation when you create a PostgreSQL database cluster, ideally using the "builtin" collation provider.
Multi-agent workflows often fail. Here’s how to engineer ones that don’t.
Most multi-agent workflow failures come down to missing structure, not model capability. Learn the three engineering patterns that make agent systems reliable.
Building Semantic Search on my Content
I've added some pretty cool AI-powered features to kentcdodds.com and I want to tell you all about it.
Helping YOU ask ME questions with AI
Here's how I've made it easier for you to call into the Call Kent podcast without having to record yourself and also make yourself anonymous using AI.
RCCLX: Innovating GPU Communications on AMD Platforms
We are open-sourcing the initial version of RCCLX – an enhanced version of RCCL that we developed and tested on Meta’s internal workloads. RCCLX is fully integrated with Torchcomms and aims to empower researchers and developers to accelerate innovation, regardless of their chosen backend. Communication patterns for AI models are constantly evolving, as are hardware […]
Security boundaries in agentic architectures
A framework for drawing security boundaries in agentic architectures. Most agents run with zero isolation between the agent and the code it generates. Learn where to draw the boundaries, from secret injection to full application sandboxing.
Cloudflare One is the first SASE offering modern post-quantum encryption across the full platform
We’ve upgraded Cloudflare One to support post-quantum encryption by implementing the latest IETF drafts for hybrid ML-KEM into our Cloudflare IPsec product. This extends post-quantum encryption across all major Cloudflare One on-ramps and off-ramps.
PostgreSQL Books
CYBERTEC regularly publishes PostgreSQL books. Keep up-to-date and get an introduction to important new database features of each version.
Sprites on the Web
In game development, it’s common to use spritesheets for animation, but this technique isn’t as widely used on the web these days. Which is a shame, because we can do some pretty cool stuff with sprites! In this post, we’ll share the niche CSS function you can use to leverage this technique, and explore some of the potential use cases.
A Designer’s Guide To Eco-Friendly Interfaces — Smashing Magazine
Every high-resolution hero image, autoplay video, and complex JavaScript animation carries a cost. Sustainable UX challenges the era of “unlimited pixels” and reframes performance as responsibility. In 2026, truly sophisticated design is defined not by how much it adds, but by how thoughtfully it reduces its footprint.
Cloudflare outage on February 20, 2026
Cloudflare suffered a service outage on February 20, 2026. A subset of customers who use Cloudflare’s Bring Your Own IP (BYOIP) service saw their routes to the Internet withdrawn via Border Gateway Protocol (BGP).
Code Mode: give agents an entire API in 1,000 tokens
The Cloudflare API has over 2,500 endpoints. Exposing each one as an MCP tool would consume over 2 million tokens. With Code Mode, we collapsed all of it into two tools and roughly 1,000 tokens of context.
How I used Cursor to Migrate Frameworks
I upgraded kentcdodds.com from Remix v2 to React Router v7 in a day with over 17k lines of code changed. Here's how I did it.
Host Leadership
How AI is reshaping developer choice (and Octoverse data proves it)
AI is rewiring developer preferences through convenience loops. Octoverse 2025 reveals how AI compatibility is becoming the new standard for technology choice.