brew install accepts a fully-qualified tap path and taps implicitly, so the separate brew tap step is noise for a first-time user.
SPEC records the two macOS facts the code bends around (bare-soname dlopens needing startup-time DYLD paths; the hypervisor entitlement) and the packaging decisions; README gains the brew install and the from-source sign step.
How to install and run the snap, and how to embed the library: one RunOptions example covers a basic machine. The logo lives under .github/img.