As more and more production system uses openwhisk
Users will need some features to protect their service safe from mistake.

So there has any protect mechanism to avoid the action delete/update action by mistake?

How about like this, for example

wsk action delete hello --comfirm yes
wsk action update hello hello.js --comfirm yes

If user wants to delete/update their action, should add --confirm yes(or --confirm y).
If don't added, give below tip

Please delete action using --confirm yes if you really want to delete it