Detection: dormant in-system lurker (artifact SETI).
hypothesisdetection_strategyScientific Instrumentation & Sensor Data
A passive probe parked in a stable niche (Earth-Moon L4/L5, lunar shadowed craters, co-orbitals like Kamo'oalewa); detect via high-res imaging/radar/thermal artifact surveys of those niches.
Relaxes the assumption a present agent is active/transmitting now. Von-Neumann probes + megayear dormancy + stable Lagrange parking are physically ordinary. SETI hunts EM, not physical artifacts - those niches are unsurveyed. HYPOTHESIS.