It seems as though for a first version we would want to not be disruptive of extension devs. Either we can target a first version that leads to changes in specific extensions managed by WMF or, likely better, we reserve that for a second phase.
Part of the intention here is to protect developers from easily making mistakes related to permissions, we should include security team once we get to the design doc phase but I think they should be listed as a stakeholder
Should be included for the same reason as security team.
Quality and test engineering
Since this is aligned with code health objectives we should included Quality and Test as a stakeholder.