tl;dr: Stringman is an $800 open-source cable-driven robot that hangs a gripper from four motors anchored in ceiling corners, giving it room-scale reach (up to 7×7×3m) with ~1.9kg average payload—roughly 500× the work volume per dollar of a typical robot arm. It's OSHWA-certified with published CAD, PCBs, and code, runs air-gapped on local Wi-Fi, supports LeRobot frameworks including Pi.05 and DiT, and uses fiducial tags to designate drop locations like laundry bins or trash cans.