This is a real screen recording of Jev assisting Codex in playing Slay the Spire.
Before this, I had already done many rounds of review and optimization with Codex, including installing mods to directly read game data and continually deepening my understanding of card strategy, and so on.
Jev really is just assistance. The principle I set for Codex was: if the sequence of plays is certain, it can be executed in batches; only call on Jev when there are strategic disagreements.