  We discuss prospects for probing short-range sterile neutrino oscillation
using neutrino-nucleus coherent scattering with ultra-low energy ($\sim 10$ eV
- 100 eV) recoil threshold cryogenic Ge detectors. The analysis is performed in
the context of a specific and contemporary reactor-based experimental proposal,
developed in cooperation with the Nuclear Science Center at Texas A\&M
University, and references developing technology based upon economical and
scalable detector arrays. The baseline of the experiment is substantially
shorter than existing measurements, as near as about 2 meters from the reactor
core, and is moreover variable, extending continuously up to a range of about
10 meters. This proximity and variety combine to provide extraordinary
sensitivity to a wide spectrum of oscillation scales, while facilitating the
tidy cancellation of leading systematic uncertainties in the reactor source and
environment. With 100~eV sensitivity, for exposures on the order of 200
kg$\cdot$y, we project an estimated sensitivity to first/fourth neutrino
oscillation with a mass gap $\Delta m^2 \sim 1 \, {\rm eV}^2$ at an amplitude
$\sin^2 2\theta \sim 10^{-1}$, or $\Delta m^2 \sim 0.2 \, {\rm eV}^2$ at unit
amplitude. Larger exposures, around 5,000 kg$\cdot$y, together with 10 eV
sensitivity are capable of probing more than an additional order of magnitude
in amplitude.
