paper-extractlisted

# Paper extract (hybrid) Do not treat direct PDF reading as the main path. Normalize machine output in `_raw/` into `extracted/`. ## Layout ``` sources/<source-id>/ ├── original/ # PDF original (placed by human) ├── _raw/ # Machine extract (not the citation source of truth) │ ├── marker.md # Marker full-text draft (single full-text extractor) │ ├── arxiv/ # arXiv LaTeX / e-print source (authoritative math; preferred) │ ├── mathpix/ # high-accuracy math pages (fallback for math) │ └── pages/ # page images pXX.png (optional, for re-extract) └── extracted/ # human-readable source of truth (cite here) ``` ## Path priority (full text) 1. Markdown exists under `_raw/` (Marker) → read it and generate/update `extracted/` 2. `_raw/` missing → ask the user to run Marker (see tooling). **Do not silently fill `extracted/` by reading the whole PDF** 3. Exceptions: short checks (e.g., Abstract) or filling pages missing from `_raw` may use the PDF / page images ## Math / equation reference priority Equations and algorithms must come from an authoritative source, not from full-text OCR. Use this fixed order: 1. **arXiv LaTeX / e-print source** (`_raw/arxiv/`) — preferred (compiled TeX; no OCR guesswork) 2. **Mathpix** (or equivalent high-accuracy math OCR) on the PDF math pages (`_raw/mathpix/`) 3. **PDF page image + vision re-extract** of only the affected pages (`_raw/pages/`) ### Fallback on fetch failure (must be e