What is it? An API key connects this app to an AI that reads your answers and writes a personalised profile just for you.
Does it cost money? A small amount, a few cents per use. You need an account at anthropic.com.
Do I need one? No. Pattern works fully without it. The AI adds a deeper personal reflection at the end.
Is it private? Your key is stored only on your device. It is never shared anywhere else.