- .pi/BUILD.md: end-to-end macOS dev workflow, deploy paths, dphys-swapfile vs fstab, troubleshooting. - .pi/Dockerfile.gplan + build-gplan.sh: rebuild gplan.so from source on Raspbian Stretch (Bullseye is too new for the toolchain). - Makefile: ensure trailing newline between concatenated pug templates so Pug doesn't glue file boundaries together.