Background Information
This is the next batch of wikis deployed as part of Parser Unification
We are deploying to two top-ten-ranked wikipedias: dewiki and eswiki.
Announcements:
- dewiki
- eswiki
(Later: frwiki, ruwiki)
Initial Evaluation
- Prepare the sample to run the visualdiff test
- Run/evaluate the visualdiff test
- Choose target wikis for this week's deploy
- Create a Confidence Report based on the results: https://www.mediawiki.org/wiki/Parsoid/Parser_Unification/Confidence_Framework/Reports/Wikipedia#Visual_diff_test_score_+_confidence_reports_for_deployments_on_April_7,_2026_(de_+_es_wikipedias)
Bug fixes
Based on initial visualdiff testing, these are tasks which affect Parsoid Read Views on these target wikis
Notify wikipedias about upcoming Parsoid Read Views roll-out
- Create MassMessage distribution list, based on Distribution_list/Global_message_delivery/Wikipedia
- Be careful, the Wikidata MassMessage tool is missing some Wikipedias
- Distribution list for this week: https://meta.wikimedia.org/wiki/Wikimedia_Foundation/Product_and_Technology/Parsoid_Read_Views/2026-04-07_Wikipedias
- Post using the MassMessage tool: https://meta.wikimedia.org/wiki/Wikimedia_Foundation/Product_and_Technology/Parsoid_Read_Views/Read_View_Announcement
- manually copy-and-paste the "signature" section from that page when using the tool
- other notes: https://docs.google.com/document/d/1sXYPJfJ5HTgWXD_h6MGMbw_6I64OeqPR1mrFrxlMnCs/edit
- MassMessage sent log: https://meta.wikimedia.org/w/index.php?title=Special:Log&logid=65348403
Deployment
- Write mediawiki-config patches for rollout
- this will be an incremental rollout
- Deploy mediawiki-config patches
Post-deploy
- Monitor talk pages and mailing lists above for any follow up work needed
- Follow up work:
- Bump incremental rollout until we reach 100