evidence-source/docs/ADR-0002-fixture-ownership.md
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feat(pdf): extract standalone PDF ingest package (ESRC-WP-0001)
Bootstrap evidence-source from the citation-evidence src/source PDF slice.

- Headless core (src/pdf): ingest/extract/fingerprint, importing domain
  contracts from @citation-evidence/engine/shared (no local copies)
- Browser upload helpers isolated under src/browser behind a ./browser
  entry point, with an eslint boundary keeping the core browser-free
- pnpm/TS/vitest/eslint scaffold; 52 tests (contract + determinism)
- Fixtures resolved from the sibling citation-evidence checkout, not
  duplicated (real PII) — see docs/ADR-0002; suites skip when absent
- Boundary + fixture decisions recorded as docs/ADR-0001 / ADR-0002
- README/SCOPE rewritten; capability.infotech.pdf-evidence-ingest
  registered, NO_CAPABILITIES removed
- Follow-on workplans ESRC-WP-0002..0004 queued; ESRC-WP-0001 finished

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-08 20:55:28 +02:00

1.8 KiB

ADR-0002 — Fixture corpus ownership

  • Status: accepted
  • Date: 2026-07-08
  • Workplan: ESRC-WP-0001 (T05)

Context

The PDF ingest contract tests are driven by a fixture corpus (fixtures/pdfs/ + manifest.json) currently owned by citation-evidence. The corpus is made of real personal and legal documents — utility-cost statements, a settlement letter, court correspondence, cemetery admission forms — containing names, addresses, and case details.

The workplan (T05) asks us to either copy the corpus into this repo or define a stable shared-fixture path.

Decision

Do not copy the corpus into evidence-source. Resolve it from the sibling citation-evidence checkout instead:

  • default: <repo>/../citation-evidence/fixtures/pdfs
  • override: EVIDENCE_SOURCE_FIXTURE_DIR environment variable

Rationale

  • Privacy. evidence-source advertises reusable ingest capability and is a candidate for wider distribution. Duplicating real PII into it multiplies the places that data lives and can be leaked.
  • Single ownership. The corpus and its manifest.json (page counts, known-good quotes) were curated and re-verified upstream. One owner avoids drift between two copies.
  • Consistent coupling. This repo already assumes a sibling checkout for its @citation-evidence/engine (link:../citation-engine) dependency. Reading fixtures from ../citation-evidence is the same coupling model, not a new one.

Consequences

  • Tests require a sibling citation-evidence checkout. In CI or a standalone clone, point EVIDENCE_SOURCE_FIXTURE_DIR at wherever the corpus is mounted.
  • When the corpus is absent, the fixture-driven suites skip with a clear message rather than failing spuriously, so unit tests that need no corpus still run.