The complete reference for each library is generated from its own source on every commit, so it never drifts from the code. The guides here explain how to use them; these list every symbol.
trendflow — TypeDoc, from types.
trendflow-py — mkdocstrings, from docstrings.
If you are looking for how to do something, start with the guides. If you already know the method and want its exact signature, parameters, or return type, use the reference above. For the differences between the two libraries, see parity.