This is the concrete, runnable walkthrough for Post 1 of the Portway series. The goal: stand up a single model behind an OpenAI-compatible endpoint on hardware you already own, call it from the official OpenAI SDK, and internalize the stateless contract. Everything here runs locally for $0.
What this post covers
A demo.py script with two blocks:
Round-trip — one chat call via the OpenAI SDK, printing the content and the usage object.
Stateless proof — the same final question sent as a 1-turn message and as the last turn of a 5-turn fabricated history; both prompt_tokens values are printed alongside an explanation of the delta.
