Prolog Necronomicon: Write an Interactive Debugger! (Re: Dogelog Player goes Multi-Threading)

We recently started porting formerly Jekejeke
Prolog to the 100% Prolog Novacore from Dogelog
Player. The current state is that formerly Jekejeke
Prolog is now 50% Prolog, and we are continuing
the transformation.
Formerly Jekejeke Prolog did have a natively
written Interactive Debugger. Dogelog Player
does not yet have an Interactive Debugger. So we
started an experiment of writing a non-native
Interactive Debugger.
Our pathological examination of formerly Jekejeke
Prolog lead to an Interactive Debugger that can
handle cuts, but that is also smart enough to
switch from 4-Port model to 2-Port model. We will
mostlikely ship it, despite some loose ends like
hiding system and library details.
See also:
Prolog Necronomicon: Write an Interactive Debugger!
https://qiita.com/j4n_bur53/items/909e114b8362ab9f3545
Mild Shock schrieb:

 Dogelog Player is a Prolog system that is written
in 100% Prolog. Formerly Jekejeke Prolog was a
Prolog system that was written in 100% Java. We
created a new version of Jekejeke Prolog that
has 50% Prolog from Dogelog Player and is
still multi-threaded.
 We trashed everything beyond the core of Jekejeke
Prolog and adopted the Dogelog Player libraries
and top-level, even library(markup) works! The
new Jekejeke Prolog is significantly slower than
Dogelog Player, almost a factor two. But it can still
serve for some cherry picking.
 See also:
 Dogelog Player goes Multi Threading
https://medium.com/@janburse_2989/6720695470fe