Codex should be tested on MediaWiki before the pilot version is released to production. Right now, the options for real use-case QA are limited to local development environments (not accessible to everyone) and beta cluster deployments (restrictive and tied to deploy trains).
This environment should replicate what it would be like to have Codex and components installed on a real wiki project (not a demo of components in isolation). See T299138 for decision on which project/page to use.
Subtasks:
- T299956 Develop a "VueTest" MediaWiki extension that can serve as a demo / development sandbox for using Codex components inside a MediaWiki special page
- T299957 Set up an automated process to stage this environment so DST and QA can review Codex in a MW environment, ideally on a per-patch basis



