It is not completely clear to me what scope of software engineering activities this document is intended to apply to. From the title I can infer that MediaWiki is in scope, but "other Wikimedia engineering endeavors" is really, really vague.
Does it apply to:
- Puppet code used to automate Wikimedia servers?
- Non-MediaWiki user facing web applications (for example https://scholarships.wikimedia.org)?
- Indirectly user facing services (for example the dynamicproxy deployments used by Cloud Services)?
- Non-MediaWiki cli tools developed by Wikimedia (for example scap)?
- Gadget code deployed to Wikimedia wikis?
- Lua code deployed to Wikimedia wikis?