| name | ingest-pdf |
| description | Ingest a local PDF (or a folder of PDFs) into the Obsidian vault -- extracts DOI/title, resolves metadata via Semantic Scholar, writes 30_Literature/CITEKEY.md. |
Ingest PDF (Desktop)
Use this skill when the user has a PDF already on disk (downloaded by hand,
emailed by a collaborator, scraped from a publisher) and wants it captured
into their vault as a proper 30_Literature/CITEKEY.md note. This is the
companion to paper-capture, which only handles DOI / arXiv id / URL /
title-author-year inputs.
Inputs accepted
- A single file path:
D:\downloads\smith2024.pdf,
/mnt/d/papers/raw/foo.pdf, or any absolute path.
- A folder of PDFs: e.g.
{vault}/80_Attachments/papers-inbox/. Process
every *.pdf under it; do NOT recurse into subfolders.
- No path given: ask the user once for the path or folder, then resume.
Workflow
- Confirm vault path. Read
OBSIDIAN_VAULT_PATH from the env. If unset,
ask the user once.
- Enumerate PDFs. If the input is a directory, list its top-level
*.pdf
files. If it's a file, that's the list of one.
- For each PDF, extract metadata in this order:
- (a) DOI sniff from text. Use the
Read tool to read the PDF (Claude
Desktop's Read tool can ingest PDFs directly). Extract page-1 / page-2
text. Run regex \b10\.\d{4,9}/[-._;()/:a-zA-Z0-9]+\b to find DOIs.
If exactly one match: that's the DOI.
- (b) arXiv id sniff. If no DOI, look for
arXiv:\d{4}\.\d{4,5} or
https?://arxiv\.org/abs/\d{4}\.\d{4,5}.
- (c) Title + first-author + year heuristic. If neither id is present,
parse the first-page text per
references/pdf_metadata_heuristics.md:
title is usually the first non-trivial line, first-author is the first
name in the author list, year is the four-digit number near the title
or in the running header.
- Resolve to canonical metadata. Hand the DOI / arXiv id / (title +
author + year) to
paper-capture. paper-capture does the actual Semantic
Scholar lookup, citekey generation, de-dup against existing
30_Literature/, and note write. Do NOT re-implement that logic here.
- Move + rename the PDF. Once paper-capture reports a citekey, move the
original PDF to
{vault}/80_Attachments/papers/{citekey}.pdf. If the file
already exists at the destination (different paper, citekey collision),
defer to paper-capture's collision rule (suffix -b, -c, ...).
- Update the note's frontmatter so
pdf: points to the renamed
attachment path. paper-capture writes pdf: null by default; ingest-pdf
replaces null with the real path after the move.
- Report. One line per ingested PDF:
Ingested: {citekey} ({title trunc 60}) <- {original-path}
Plus a final summary: Total: {n} ingested, {m} skipped, {k} failed.
Failure handling
- Encrypted / scanned-image-only PDF. No selectable text; DOI sniff
returns nothing and the title heuristic is unreliable. Skip the file,
report:
Skipped: {path} -- no extractable text. Run OCR first.
- DOI doesn't resolve in Semantic Scholar. paper-capture will fall back
to
paper-mcp and then escalate to user. ingest-pdf surfaces that to the
user and leaves the PDF in place.
- PDF is already in the vault (
{vault}/80_Attachments/papers/{citekey}.pdf
exists for the same DOI). Skip; report Already captured: {citekey}.
What this skill does NOT do
- It does NOT OCR. Image-only PDFs are reported, not handled.
- It does NOT re-implement metadata resolution. That's paper-capture's job.
- It does NOT write to
30_Literature/ directly. Always goes through
paper-capture.
- It does NOT auto-tag the new note with a project. The user does that
manually or via
paper-map later.
