Which anti-drifting technique adopted by F1

Thanks for your excellent work.

Which anti-drifting technique, if any, is adopted by F1? It seems to be just a simple next-frame prediction without any anti-drifting mechanisms.

The issue names no file, test, or entry point, so begin by locating FramePack's frame-prediction and sampling documentation or implementation. Determine whether F1 includes an anti-drifting mechanism beyond next-frame prediction, then document a clear explanation with references to the relevant project material.

Written by the indexing model from the issue text.