- esp32-s3-pinout.yml: complete FluidNC machine config for 4×axis, 2-motors-per-axis (8 TMC2209, UART mode) - schematic_netlist.md: component-level connection table (ESP32-S3, TMC2209, power, connectors, BOM) - pins derived from Maslow 4 ESP32-S3 board layout adapted for 4-axis gantry - TMC2209s on 2 UART buses (GPIO17/18), 4 addresses each, VREF resistor matrix