- ignore: *.o/*.elf/*.drv/*.img/*.rlib/*.rmeta/*.pdb/*.dbf/*.rgba/target//.build_tmp (all regenerable) - keep: source assets (png/ttf/webp), vendored payload (SYSTEM/lib dll, SYSTEM/bin exe), demo video (TESTSHOW/*.mp4 via Git LFS), text build logs (.d/.timestamp) - untrack 290+ build artifacts from index
Add the current OS source tree, build scripts, system image layout, and development notes covering DMA page allocation, e1000 bring-up, net API dispatch, and DHCP work in progress.