Retrieval that corrects itself
The pipeline you built always retrieves and always trusts what it gets back. Grading the results, re-querying when they miss, and deciding whether to retrieve at all is self-correction applied to the one part that can go and find the missing fact.
Not yet
This one opens once you have finished Agent security.
Progress is kept against your account, so finishing a module needs one. Everything up to here is open without.