1# Brief — Part III "Data and Systematic Review Protocol" (file manuscript/sections/part03_data.tex; bib manuscript/references_part03.bib)23Target 25–35 pages. Explain corpus construction, source coverage, deduplication, eligibility and research integrity4(CLAUDE.md §9, PRISMA 2020 items where applicable). Sources of truth to read: RESEARCH_PLAN.md §2–§3, protocol/PROTOCOL.md,5protocol/amendments.csv, reports/PHASE0_FEASIBILITY.md, data/raw/README.md, ingestion/*.py (what each does, measured sizes),6systematic_review/define_corpus.py (exclusion codes E1–E7, the CS-core rule, date precision), data/metadata/linkage_report.json,7data/metadata/prisma_counts.json, figures/FIGURES.json (fig_prisma_flow, fig_volume_yearly, fig_types_openness exist in8manuscript/figures/ — reference them with \includegraphics{fig_prisma_flow.pdf} etc.; copy from figures/ to manuscript/figures/ if missing).9Sections: 1 sources and access (licences, snapshot release, API budget facts, Semantic Scholar unavailable); 2 identification10(what each source contributes, sizes via macros); 3 linkage (methods, counts via macros, the second snapshot pass and why);114 deduplication of preprint/published pairs; 5 eligibility (codes, counts, decisions A-001/A-002 with their evidence);126 the CS-core vs penumbra design and the strict core; 7 date precision, indexing lag, right truncation (created_date is13unusable for lag — explain); 8 quality indicators and known biases (DBLP coverage, OpenAlex topic noise, XPAC, Zenodo flood,14missing abstracts, forward-dated records); 9 research-integrity procedures (preregistration, amendments log, human checkpoints,15agent register, no fabrication rules). Every number through macros (`\PrismaCsCoreEligible`, `\LinkDblpLinkedDistinct`, …).16