civic flax
and later mark them as pass/fail back into the scheduler,
I don't know what you mean by that.
But everything else you described is basically how the Leech feature works -- https://docs.ankiweb.net/leeches.html. If you set the cards to suspend, you'll have to manually unsuspend them. But you don't want the leech counter to "reset," it keeps counting and will take action on the card again.
civic flax
But why would it be suspended again after a single miss? Is your leech-threshold set to 2?
civic flax
You should read the page I linked so you understand how the leech action works. It does not trigger with every Again grade.
I don't know why you would grade the card Again "to pull it back into the scheduler," since the last grade it got was Again, which is how it got suspended in the first place.
civic flax
If you keep failing that card, Anki will continue to alert you about the leech periodically. These warnings occur at half the initial leech threshold. For example, if you set the warning at 8 lapses, future warnings will happen every 4 lapses (at 12, 16, and so on).
civic flax
What you asked for -- except for resetting the leech counter -- is what the system already does. I suppose it was my mistake to assume you could extrapolate that from the text.
If you want to reset the leech counter -- for whatever reason -- you'll need an add-on.