Native schematic validation passed.
KiCad ERC: zero reported errors/warnings; no project exclusions added.
17 connected nets, 9 components; exact net memberships verified.
15 firmware GPIO definitions independently checked against exported pin functions.
All 44 MCU header pins accounted for; USB/UART0/5V/PSRAM pins unused on carrier.
PDF and SVG exported successfully.
User accepted module mapping/fit and reports purchased switches/resistors.
No new hardware tests; regulator margin, USB backfeed safety, RF performance
and fabrication qualification are not established by this schematic check.