What

Maybe we should merge the :strict and :script contexts into something like sanitization mode, because context { strict: true, script: true } doesn't make sense. Also, I think the name strict is a bit ambiguous since it does not indicate what it makes strict, sanitization, Markdown syntax compliance, or restriction of some features?
#46 (comment)

Why

Relation between our apps and their filter contexts are messy.

(current state)

#54 adds CodePen support to Qiita:Team, but maybe the author didn't intend to do so.