What's new for developers? (April 2026)

[justintadlock]

This is a rolling discussion for a monthly series that is intended to keep track of the items, PRs, Trac tickets, and Make blog posts that are interesting/important for developers. The goal is to publish a post on the 10th of each month with the previous month's updates.

Everyone is welcome to contribute to this monthly document. If you find something interesting, just create a new reply to this discussion below.

Google Doc: https://docs.google.com/document/d/1S85VsQft_R84oe_ighFtV8vxq48ZIVV7IbVFF1PASTc/edit?usp=sharing

Author: @jonathanbossenger will be writing this month's edition.

[jonathanbossenger]

Heads-up @bph @adamziel @jonathanbossenger @alexapeduzzi @fellyph: To include your project's news for developers, please add the information or a link as a comment to this issue.

Deadline: 5th of April.

[bph]

📢 Reminder — skipped for April 2026 (deadline is April 5, before the 20-day window).

[fellyph]

Hey Amazing people,

I have some links from WordPress Playground:

Blog:

• The new Blueprint Agent Skill
• WordPress Playground MCP Server
• Improvements on PHP WASM binaries
• new mode start on Playground CLI

Docs:

• Playground Agent Skills guide
• E2E Testing with Playwright and WordPress Playground
• Programmatic Usage of Playground CLI

Other Features

• New site editor performance benchmark
• Centralized site management API and expose as window.playgroundSites
• Load SQLite for phpMyAdmin and Adminer using WP configuration
• php command to run PHP scripts on Playground CLI
• Auto restart with --experimental-wasm-jspi support
• Playground Website Supports CURLFile uploads
  
• Experimental support for WebMCP
• Support streamed PHP responses in the service worker

[jonathanbossenger]

WIP Draft: https://docs.google.com/document/d/1hxEdoRv7pBhZT3mDipnMzdBSxalyWg_jFlQrV84KDAU/edit?usp=sharing

This is not yet ready for review. I'm waiting on the Gutenberg 22.9 release, which is due this coming Wednesday, the 8th.

[justintadlock]

Did an initial review. Biggest things:

• Make sure each section has a relevant link.
• No Themes heading? There are several items that would fit there.
• If possible, add some screenshots for the Highlights section.

[jonathanbossenger]

Thanks @justintadlock I'll work on making the updates today, and open it up for the proper review.

[jonathanbossenger]

I've incorporated the changes, and the post is ready for review.

@justintadlock Most of the WordPress 7.0 updates in the highlight section are API changes, so it's hard to add screenshots, but I've added a screenshot of the Connectors screen. Let me know if you have any other ideas.