  We realize a two-stage, hexagonal pyramid magneto-optical trap (MOT) with
strontium, and demonstrate loading of cold atoms into cavity-enhanced 1D and 2D
optical lattice traps, all within a single compact assembly of in-vacuum
optics. We show that the device is suitable for high-performance quantum
technologies, focusing especially on its intended application as a strontium
optical lattice clock. We prepare $2\times 10^4$ spin-polarized atoms of
$^{87}$Sr in the optical lattice within 500 ms; we observe a vacuum-limited
lifetime of atoms in the lattice of 27 s; and we measure a background DC
electric field of 12 Vm$^{-1}$ from stray charges, corresponding to a
fractional frequency shift of $(-1.2\times 0.8)\times 10^{-18}$ to the
strontium clock transition. When used in combination with careful management of
the blackbody radiation environment, the device shows potential as a platform
for realizing a compact, robust, transportable optical lattice clock with
systematic uncertainty at the $10^{-18}$ level.
