I Built an AI That Makes Real Phone Calls — Here's the Architecture

A few weeks ago, I asked my AI agent to call a local Indian restaurant and order chicken biryani for pickup. I gave it my name, my pickup time preference, and one rule: don't make anything up. It dialed the number. It introduced itself as my assistant. It asked for one chicken biryani to-go, confirmed the $15 price, accepted a 20-minute pickup window, said thank you, and hung up. I drove over and picked up dinner. No human on my end. The transcript is saved as a .txt file. The audio is saved as