bc857b-qr: hero from the plain model
bc857b-qr: one-pass backfill (symbol Device:Q_PNP, re-etched, hero rebuilt in-pass (inputs changed))
bc857b-qr: specified limits as data (metadata.characteristics, 27 rows from the datasheet)
bc857b-qr: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding)
bc857b-qr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero
Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout")
bc857b-qr: factory component page (tier=lcsc)
Initial commit: component/bc857b-qr