Spin & Gos are won at short stacks: precise push/fold ranges, blind-vs-blind aggression and tight limped-pot play. Leakpok scores every 3-max spot you played against GTO and ranks your leaks by the EV they cost you.
Yes — short-stack all-in ranges are a first-class part of the analysis, including the jam spots that per-hand views miss.
The engine benchmarks the exact spots you played by position and depth, which is what 3-max Spin & Go play comes down to.