=== Beta
[x] Enable Codex Special:Block on Test Beta Wikipedia
[x] Enable multiblocks for all beta wikis, except for [[ https://en.wikivoyage.beta.wmflabs.org | English Wikivoyage ]] (only Codex Special:Block, no multiblocks) and [[ https://en.wikisource.beta.wmflabs.org | English Wikisource ]] (no Codex Special:Block or multiblocks)
=== Production
[X] Enable multiblocks and Codex Special:Block to Polish Wikipedia on **March 27** after [[ https://versions.toolforge.org/ | wmf.22 ]] is live
[x] Enable multiblocks and Codex Special:Block to German Wikipedia on **April 3** after wmf.23
[x] Enable multiblocks and Codex Special:Block to Italian Wikipedia on **April 3**
[x] Test Wikipedia
[] Enable multiblocks and Codex Special:Block to Hebrew Wikipedia on TBD
=== Pre-deployment checklist
* Ask the community about any important gadgets or user scripts that are supposed to work while viewing Special:Block.
* Inform the community that //any// script that uses the [[ https://www.mediawiki.org/wiki/API:Block | block API ]] and is supposed to do re-blocking may need to be [[ https://www.mediawiki.org/wiki/Help:Manage_blocks/Developers#API | updated ]] to work on //multi-blocked// targets.
** Similarly the [[ https://www.mediawiki.org/wiki/API:Unblock | unblock API ]] requires an `id` to be given if the target has multiple active blocks.
** Most use-cases involve (re)blocking or unblocking when the target has zero or one blocks, and will continue to work as it did before.
* We can try searching ourselves with a search like `insource:Block` on pages in the MediaWiki namespace. Note however that some scripts may use the localized form of Special:Block, so "Block" by itself may miss things.
* Point volunteer developers to https://www.mediawiki.org/wiki/Help:Manage_blocks/Developers
* If there are conflicting gadgets/scripts, ask an engineer to investigate.