WordPress 7.0: What's New for Developers

WordPress 7.0 shipped on May 20, 2026 — and it is one of the most consequential releases for developers in years. It puts AI directly into Core, modernizes the entire admin experience, and quietly introduces a handful of breaking changes that will affect a lot of existing block plugins.

This series covers 7.0 the way a working developer needs it: what each feature actually does, what is genuinely new versus repackaged, and — most importantly — what you have to change in your own code. It is built from the official WordPress 7.0 Field Guide, not press-release summaries.

Who this series is for:

• You build or maintain WordPress plugins and themes and need to know what 7.0 changes for you
• You write custom blocks and want to know which of them will break
• You are deciding whether — and how fast — to test against 7.0
• You want the AI features explained in concrete, code-level terms rather than marketing language

What this series is NOT:

• An end-user “what’s new” tour — this is developer-facing throughout
• A WordPress beginner’s guide — you should already know how plugins, hooks, and block.json work
• An AI tutorial — we explain the new AI APIs, not machine learning itself

Start at Part 1 if you want the full picture. If you maintain block plugins and need the urgent material first, jump straight to Part 3 — Breaking Changes: the iframed editor and contentOnly changes are the two things most likely to break a plugin the day your users update.