---
id: ESRC-WP-0003
type: workplan
title: "Document metadata enrichment beyond pass-through options"
domain: infotech
repo: evidence-source
status: finished
owner: codex
topic_slug: citation_evidence_mvp
created: "2026-07-08"
updated: "2026-07-09"
spec_refs:
  - README.md
  - src/pdf/ingest.ts
  - src/pdf/metadata.ts
state_hub_workstream_id: "831267a1-fc93-4872-a25b-73793d9c5df4"
---

# ESRC-WP-0003 — Metadata enrichment

Today `ingestPdf` only passes through caller-supplied `title`/`uri`/`metadata`.
This workplan extracts intrinsic document metadata (PDF info dictionary,
embedded XMP, page-derived signals like author/creation date/title) and folds
it into the `Document` record without breaking the pure-over-bytes contract.

## Sketch

```task
id: ESRC-WP-0003-T01
status: done
priority: low
state_hub_task_id: "45eeef15-41a9-4abd-9436-ed77e2c6b3a4"
```
Enumerate available PDF metadata sources (info dict, XMP) via PDF.js and decide
precedence vs. caller-supplied options (caller wins).

```task
id: ESRC-WP-0003-T02
status: done
priority: low
state_hub_task_id: "41ca090f-c709-420a-b7c5-8332e4e82bd1"
```
Implement extraction into a normalized metadata shape; keep it optional so
minimal-metadata PDFs still ingest cleanly.

```task
id: ESRC-WP-0003-T03
status: done
priority: low
state_hub_task_id: "0004881b-6577-4a62-a2ff-cbb5c4706b1b"
```
Contract tests over the fixture corpus asserting extracted vs. overridden
metadata precedence.