What's changed

Everything that's changed in the book and around it, newest first. Every update is free for everyone who's bought it.

28 October 2026

Three new AI skills, for right-to-left languages, timezones and forms.

• /rtl-check reads your code and reports what will break in Arabic, Hebrew, Persian and Urdu: physical CSS and Tailwind classes, icons that should or shouldn't mirror, phone numbers and user content that need isolating, JavaScript that assumes left to right, and Arabic type settings. Its script lists every physical property with the logical one to use instead, and can run in CI.
• /timezone-review follows one date or time at a time through your app, from the form to the database, the scheduler and the email, and reports where it changes meaning, with a script that lists the exact hours each timezone skips or repeats.
• /form-review follows one form, like checkout or signup, from the markup to every email, label and export that uses it, and proposes what it should ask in each country you serve.

27 October 2026

Three new AI skills, a free locale inspector, and a live demo on the homepage.

• New AI skills. /check-translations reviews translation files for dropped placeholders, broken ICU messages and plural forms the language doesn't use. /translator-brief drafts a brief, style guide and glossary for a new locale. /l10n-vocabulary gives your agent the glossary, so you and it use the same words.
• The locale inspector. A free bookmarklet that pseudolocalises any page, flips it right to left, and highlights text that gets cut off.
• One value in many locales. The homepage now shows one price, date or number written the way fourteen locales write it.