h1st-ai/h1st ? reverse-engineered prompt

Build me a Python library called H1st for human first AI, where I can mix simple rule based logic with machine learning and explain what the model is doing in a way people can trust.

I want the package to include a clean object model, a way to build small reusable model pieces, and a graph style workflow for chaining them together. Please add a few simple examples and notebooks that show a hello world rule model, a basic ML model, and one real world example like predictive maintenance or Iris classification. It should also include clear docs so someone new can understand the idea and get started quickly.

Make sure it works on Python 3.8 or newer, include tests, and keep the code easy to read and extend. If you need to check current library docs or best practices, look them up online as you go.