Alex is halfway through a morning run when the tread on their right shoe slips on a wet curb. "Hey Kai," Alex says to their phone's AI assistant, "I need new running shoes, similar to my last pair but cheaper if possible."
Kai, Alex's personal shopping agent, already knows the last pair: Brooks Ghost 17, purchased eleven months ago for $139.99. Kai checks Alex's gait data from the phone's accelerometer, notes 847 miles logged, and confirms: these shoes are due for replacement. Kai also knows Alex's budget preferences (value-conscious, willing to wait 2-3 days for shipping, not brand-loyal if the biomechanics match).
Kai's first action is to post a structured job request to an open agent marketplace: "Find and purchase neutral-cushion road running shoes, men's 10.5, compatible with mild overpronation, target price under $120, ship to Portland OR."