Joost.blog

Browsers are removing support for XSLT, a feature that turns XML files into readable web pages.

The Model Context Protocol shipped its fifth spec release today: MCP 2026-07-28.

I’ve spent most of my working life on websites: building them, optimizing them, and helping millions of people do the same.

Dries Buytaert wrote a good post this week: License-only versus Stewarded Open Source.

Two new standards for the agentic web landed within a week of each other this month.

Building software is the easy part.

Update, June 4: Lovable co-founder and CTO Fabian Hedin responded on X: “I agree it should change!

This week I shipped an MCP so AI agents could read specification.website.

Every framework, CMS, and static-site generator reinvents the same list of defaults from scratch.

Open Source First is the right principle for EU digital sovereignty.

Take a photo of your drinks cabinet and hand it to an AI assistant. cocktail.glass will tell you which cocktails you can make tonight.

In the 24 hours before I started writing this post, Plausible told me joost.blog had 254 visitors.

Google killed FAQ rich results entirely on May 7, 2026.

The driver for this redesign was simple.

In her piece on Gutenberg 23.1, Rae Morey quoted my reaction to Jamie Marsland’s celebratory tweet about WordPress shipping a native UI for registering custom post types: So… how long before we get this for custom fields too?

Domain migrations are asymmetric bets.

Cloudflare recently launched isitagentready.com, a tool that scans your site across five categories and gives you a score out of 100.

Open source spent thirty years winning an argument about cost.

Astro ships a built-in SPA router called ClientRouter.

I updated one of my Agent Skills and realized I had no way to tell my other machines they were running a stale copy.

Measuring whether a standard works by checking if anyone uses it before it exists is backward.

In 2008, I wrote WordPress SEO: the definitive guide.

Recently I wrote that the open web doesn’t need more defenders, it needs builders.

Anil Dash recently published Endgame for the Open Web, and it’s a piece worth reading.

When Cloudflare launched EmDash CMS on April 1st, the reactions came fast — from Matt Mullenweg himself, from Hendrik Luehrsen at Kraut.press, and from Brian Coords.

The way we build software changed forever at the end of 2025.

I have written quite a bit.

For twenty years, “I want a website” meant “I need a CMS.”

If you were around for early SEO, the current AI-content wave should feel familiar.

Over the past year, we, Karim & Joost, have written and talked extensively about the challenges facing WordPress.

I’ve been playing with OpenClaw a lot, and I’m using Obsidian intensely with it.

AI will confidently sign off on anything.

What if your users could submit a bug report and have a pull request ready for review before you’ve even seen the ticket?

Today, Cloudflare announced Markdown for Agents, a feature that automatically converts HTML to markdown at the edge when AI agents request it.

Google just announced a massive shift in how the internet shops, and the biggest platform on the web wasn’t even in the room.

The news hit the developer community like a cold bucket of water.

In my last post, I discussed why a design system is the “visual rail” AI needs.

In my last post, I argued that WordPress needs to become a “Base AI”: a structured foundation that AI can understand and build upon.

In my previous post, I discussed the demise of code copyright and mentioned what Dries referred to as the generalization tax.

We are witnessing a strange paradox in software development.

In December, I wrote about the state of leadership in the WordPress ecosystem and what should be on WordPress’s roadmap.

Introduction Recent observations have highlighted a significant surge in new plugin submissions to the WordPress repository, as noted in this post.

At Yoast, we had one mission: make SEO easier.

Last week was a whirlwind, first diving deep into AI and WordPress while working with the WP CLI as MCP host team at Cloudfest, then heading off to SMX Munich for non-stop conversations about SEO, AI, and the future of search.

One of the things one runs into when you’re doing large migrations (between domains, or within a domain) is that you run into redirects that go “wrong”.

This post explains how WordPress uses comment cookies and why that is detrimental to your site’s caching.

A vision for a new WordPress era WordPress is at a crossroads, now even more clearly then when I wrote my previous post on WordPress’s roadmap.

Update: Since writing this, I proposed FAIR as a path forward for WordPress governance, and later wrote about why we stopped pursuing it.

AVIF and WebP are efficient image storage formats.

By Marieke van de Rakt and Joost de Valk WordPress marketing is a collaborative effort.