Give my SPARK a voice file. Add a small "TEACH SPARK" panel on the page where I paste 3 to 10 of my best posts. He studies how I actually write: my rhythm, my slang, how I open and close. From then on EVERY draft he writes must sound like me, not like AI. Save the voice file to disk so it survives restarts. After I teach him, have him prove it: one caption in my voice next to one generic AI caption, so I can see the difference.

This is the key moment: the side-by-side comparison is where most people react with surprise. Feed it your real posts, including the weird ones. The weird ones are your voice.