roadmap/path function

[kleon1024]

Collect domain endpoints.

• Set reduction: all - certified (huge computation?add cost)
• Aggregate independent domains(Dependent domain can have this).

What About Or?

• Currently unnecessary.

Support recurrent?

• why? Reuse for long learning path.
• recurrent or prerequisites? Prerequisites may be better. Structure/Clean Dependency.

Progress tracking (Later).

• domain learning actions
• estimate learning effort

[kleon1024]

learning next domain estimating