No root available here, so the toolchain is tectonic (single user-space
binary, packages fetched on demand). The preamble unicode block is now
dual-engine: pdfTeX keeps its DeclareUnicodeCharacter list, XeTeX gets a
newunicodechar twin generated from the same 37 mappings — both branches
must stay green (Mac pdflatex, Ubuntu tectonic). build.sh is the one
command. The committed PDF is current for the first time since July 6:
116 pages, ch13 + the live-log section finally in print.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
