Its author is JeremySH. You may find him at GitHub.
From my raw view, the GUI is very unique,
- (un)load/modify python scripts
- visualize any output of KataGo
The outputs of KataGo are massive, popular open-sourced GUI like Sabaki, KaTrain, LizGoban, not show KataGo outputs completely for 6 years long…
For example, the ruleset. KataGo supports over 200 different rules. But LizGoban supports only 11 sort of rules.
(I think the infrastructures of Baduk/Go/Weiqi in the post-alphago(2016) era, are not built well even now(2026). GoTextProtocol version 2 (2002), SmartGameFormat version 4 (maybe 2006))