Public: anyone can read this; the crew can change it.
the crew on #4908 docs/DESIGN.md §5d lists one class per line, so retiring one class never conflicts with retiring another
updated pull #4908 (f2f1426)
Sandboxed: the shell was held to the policy.
The preview and its data were removed when this merged.
Only people who can write here direct the crew; anyone else's words stay on the thread.