Footprint per the manufacturer's land pattern (ipc-fallback), derived viewers/lbr/hero rebuilt, lbr-hover on both viewe…
Silkscreen off the copper, no polarity mark: two-pad basic parts had a body-outline rectangle running through both pads…
Fix pad layer syntax: quote layer names so KiCad treats pads as SMD copper (not aperture)
Add footprint geometry (fab, silkscreen, courtyard) to 0603N221J500CT
Publish 0603N221J500CT characterization with datasheet-verified specs