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rag-service/openspec/changes/archive/2026-09-21-ocr-ingest-integration/proposal.md

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Proposal: OCR Ingest Integration (ocr-ingest-integration)

Project: rag-service — Phase: sdd-propose — 2026-09-13 Store: hybrid (OpenSpec + Engram sdd/ocr-ingest-integration/proposal) Contract: docs/CONTRATO_CICLO_VIDA_Y_OCR.md Punto 3 (closed)

Intent

Auditable OCR ingestion for scanned PDFs: durable originals, async processing behind a review gate, approval before OCR content enters retrieval. Native ingestion and Punto 2 must not regress.

Scope

In: async OCR branch (202 + statusUrl, GET /ingestions/:versionId, version-level review gate); migration 002_ocr_review.sql with transitions indexing→review_required→indexing|rejected; page-level PDF extraction (pdfjs-dist spike; pdf-parse fallback), detection; private ocr-service/ (Python, PaddleOCR pinned, idempotent /v1/jobs); dispatcher, OCR client, artifacts, lease-aware reconciler; review endpoints (candidateSha256, corrections, 409), sweeper, review UI; OCR_INGEST_ENABLED flag, limits, deploy order, docs, fixtures.

Out: client PDFs in repo; UI polish; extra Node workers; contract amendments. FacturaTech acceptance: production.

Capabilities

openspec/specs/ is empty — all new.

  • ocr-ingest-orchestration: async ingestion, durable originals, job/page state machine, dispatcher, reconciliation
  • ocr-processing: page extraction, detection, composition, service contract
  • ocr-review-workflow: review gate, corrections, approval, retention

Modified: none.

Approach

Contract-as-specified (exploration Approach 1): in-process Node dispatcher plus private PaddleOCR service. Blocks: 1) persistence/state, 2) page extraction, 3) OCR service (parallel; joins at 4), 4) orchestration/artifacts, 5) review/indexing, 6) security/retention/deploy, 7) e2e validation. Durable originals precede version creation; unapproved candidates stay out of retrieval. TDD.

Affected Areas

Area Impact
src/modules/ingest/service.ts, parsers/parser-registry.ts Modified: async OCR branch; per-page parsePdfPages
src/modules/catalog/{repository,reconciler}.ts Modified: new transitions; lease recovery
src/app.ts, src/api/openapi.ts, public/playground/* Modified: disk multer; 202; /ingestions/*; review UI
src/modules/ocr/, ocr-service/, migrations/002_ocr_review.sql, src/config/env.ts, Dockerfile, docs New

Risks

Risk Likelihood Mitigation
Native ingest regression Medium TDD; native-regression tests first
pdfjs-dist on Node 22 Medium Day-one spike; contract fallback
OCR image fragility Medium Pinned versions; baked models
Review budget overrun High Auto-chain; split blocks 4–5

Rollback Plan

OCR_INGEST_ENABLED=false restores native-only behavior. Migration 002 rollback: drop the new tables plus migration row (no production data references them). Qdrant untouched until approval; candidates invisible to retrieval.

Dependencies

Contract Punto 3; Punto 2 lifecycle (in production). Deploy: OCR service → RAG (flag off) → native verify → enable → acceptance.

Success Criteria

  • Native PDFs ingest sync, zero behavior change; tests green
  • Scanned PDF: 202 → OCR → review_required → approve → active
  • Candidate never retrievable pre-approval (fail-closed)
  • Expired leases redispatched idempotently; corrections 409 atomic
  • Sweeper honors TTLs; active versions never deleted
  • npm run check, npm run build, npm test, pytest offline
  • FacturaTech: 34 entries human-approved