- Makefile.lx (new, zero upstream touch): LX_TAGS, ldflags -lx version, lx-build → sing-box - .github/workflows/lx-ci.yml: build(lx tags)+version+vet+check - lx-test/config/minimal.json (avoid upstream test/ go module) - relocate spec refs test/config → lx-test/config - 001 complete: builds, version 1.13.13-lx.1, check OK; mark folder -C-