This is a reminder of the upcoming Codex v2.0.0-rc.1 release scheduled for 29 
April 2025, which will ride the train the week of 5 May 2025. This first 
release candidate will include all known breaking changes. Assuming no major 
issues are discovered, v2.0.0 will be released on 13 May 2025 and ride the 
train the week of 19 May 2025.

==== Breaking Changes ====

Developers using Codex are encouraged to check for breaking changes documented 
at https://www.mediawiki.org/wiki/Codex/Release_Timeline/2.0#Breaking_changes 
to avoid compatibility issues. Phabricator tasks have already been filed for 
known areas that need to be updated based on codesearch but this may not be 
comprehensive.

==== Visual Changes ====

With the exception of some interfaces in MonoBook detailed at 
https://www.mediawiki.org/wiki/Codex/Release_Timeline/2.0#Visual_changes, 
readers and editors should not experience any major visual changes as part of 
this release.

Codex components and interfaces that use Codex design tokens may look slightly 
different but any changes should be either negligible or improvements. Some 
potentially noticeable visual changes include:
- Dialog titles have increased in size.
- Spacing between Checkboxes and Radios within groups has been reduced.
- Padding in block-style Messages has been reduced.

The changes to the typography scale will be visible to readers only once Codex 
font modes are incorporated into the text preferences feature of Vector 2022 
(tracked in T391891) and other skins, which will happen at a later time. This 
change will make interfaces built with Codex appear even more consistent, 
especially across skins (and text size options in Vector 2022).

A complete picture of the testing effort prior to release is documented in 
T386298. Issues discovered in beta during testing post-release will be tracked 
in T392379 and issues discovered as part of the train deployment will be 
tracked in T392390.

Thank you for your attention,

Anne Tomasevich, on behalf of the Design System Team
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