Add make and latexmk build

.gitignore

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+# LaTeX build artifacts
+*.aux
+*.bbl
+*.bcf
+*.blg
+*.fdb_latexmk
+*.fls
+*.log
+*.out
+*.run.xml
+*.synctex.gz
+*.synctex(busy)
+*.toc
+*.lof
+*.lot
+*.dvi
+*.xdv
+figures/src/*.pdf
+
+# Build output
+build/
+figures/build/
+main.pdf
+main.pdf.tmp
+
+# Downloads waiting to be moved to context/related-papers/
+ingest/*
+!ingest/.gitkeep
+
+# Scratch output
+scratch/**/build/
+scratch/**/*.pdf
+
+# OS files
+.DS_Store
+Thumbs.db
+desktop.ini

.latexmkrc

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+# Settings shared by vimtex, make watch and make.  vimtex and make watch write into build/; make passes -outdir=build/make, so a make run never writes the files of a running watch.
+$pdf_mode = 1;
+$out_dir = 'build';
+ensure_path('TEXINPUTS', './venue//');

Makefile

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+# vimtex and make watch write into build/ (set in .latexmkrc); make writes into build/make/, so it can run while a watch is compiling.
+
+LATEXMK  := latexmk
+FLAGS    := -interaction=nonstopmode -halt-on-error -file-line-error
+BUILD    := build/make
+ARXIV    := build/arxiv
+
+FIG_SRC  := $(wildcard figures/src/*.tex)
+FIG_PDF  := $(FIG_SRC:figures/src/%.tex=figures/build/%.pdf)
+FIG_DATA := $(wildcard figures/data/*)
+
+.PHONY: all figures watch clean arxiv wordcount
+
+all: figures
+	$(LATEXMK) $(FLAGS) -outdir=$(BUILD) main.tex
+	cp $(BUILD)/main.pdf main.pdf.tmp && mv main.pdf.tmp main.pdf
+
+figures: $(FIG_PDF)
+
+# Each figure is compiled from figures/src/ into a temporary folder and moved into place, so a running watch never reads a half-written PDF.
+figures/build/%.pdf: figures/src/%.tex $(FIG_DATA) | figures/build
+	@tmp=$$(mktemp -d figures/build/.tmp.XXXXXX); \
+	if (cd figures/src && pdflatex $(FLAGS) -output-directory=$(CURDIR)/$$tmp $*.tex > /dev/null); then \
+	  mv $$tmp/$*.pdf $@ && rm -rf $$tmp && echo "Built $@"; \
+	else \
+	  cat $$tmp/$*.log; rm -rf $$tmp; exit 1; \
+	fi
+
+figures/build:
+	mkdir -p $@
+
+watch: figures
+	$(LATEXMK) -pvc -view=none -synctex=1 -interaction=nonstopmode -file-line-error main.tex
+
+clean:
+	rm -rf build figures/build
+
+# The tarball takes main.tex, sections/, appendix/, macros/, bib/, the compiled figures, the .bbl and the files of venue/; context/, scratch/, ingest/, .claude/, CLAUDE.md, writing-style-guide.md, claudese.md and .mcp.json stay out.
+arxiv: all
+	rm -rf $(ARXIV) && mkdir -p $(ARXIV)/figures/build
+	cp -r main.tex sections appendix macros bib $(ARXIV)/
+	cp figures/build/*.pdf $(ARXIV)/figures/build/
+	cp $(BUILD)/main.bbl $(ARXIV)/
+	find venue -type f ! -name .gitkeep -exec cp {} $(ARXIV)/ \;
+	tar -czf build/arxiv.tar.gz -C $(ARXIV) .
+	@echo "Wrote build/arxiv.tar.gz"
+
+wordcount:
+	texcount -sum sections/*.tex appendix/*.tex