This came out of the [[ https://wikitech.wikimedia.org/wiki/Incident_documentation/20160712-EchoCentralAuth | Echo+CentralAuth failure to login ]] incident's [[ https://wikitech.wikimedia.org/wiki/Incident_documentation/20160712-EchoCentralAuth/Retrospective | retrospective ]].
Note: The quotes in the task title should be taken as [[ https://en.wikipedia.org/wiki/Scare_quotes | scare quotes ]] in the sense that they are either aspirational ("all") or will be defined as we go ("responsible parties", "components").
Previous attempts (which may or may not be solution to this problem):
* [[ https://www.mediawiki.org/wiki/Developers/Maintainers | mw:Developers/Maintainers ]]
* [[ https://docs.google.com/spreadsheets/d/1e25O69JxLPYBrwunDDLFGM80eFQuTzghY0EsvvgQR0s/edit#gid=0 | Extension blame map ]] (gdoc) - Owned by @Jdforrester-WMF ?
* [[ https://www.mediawiki.org/wiki/Reading/Component_responsibility | mw:Reading/Component_responsibility ]] - The Reading Team's self-identification of components/extensions they are responsible for including level of service ("Actively developed/integrated?" and "First code review SLA+")