# Document Index Pipeline

> Orchestrate the 7-phase document indexing pipeline (A→G) for the 1M+ document corpus. Use when running batch extraction, classification, or gap analysis on og_standards, ace_standards, or workspace_spec sources.

- Skill: `vamseeachanta/document-index-pipeline` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/document-index-pipeline`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/document-index-pipeline/raw
- Safety review: PASS (external: skill-scanner WARNING, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/document-index-pipeline

---


# Document Index Pipeline

> 7-phase pipeline: Index → Extract → Classify → Data-Sources → Backpopulate → Gaps → Ledger

## Quick Reference

```
Phase A: index.jsonl (1M records)     — deterministic scan
Phase B: summaries/<sha>.json         — LLM discipline + deterministic ASTM
Phase C: enhancement-plan.yaml        — domain classification
Phase D: .planning/data-sources/<repo>.yaml — legal-gated
Phase E: backpopulate index.jsonl     — deterministic heuristics
Phase F: WRK items from gaps          — deterministic
Phase G: standards-transfer-ledger    — deterministic merge
```

## Phase Commands

### Phase A — Index corpus
```bash
uv run --no-project python scripts/data/document-index/phase-a-index.py
```
- **Input**: Filesystem paths + og_standards SQLite (`/mnt/ace/O&G-Standards/_inventory.db`)
- **Output**: `data/document-index/index.jsonl` (1,033,933 records)
- **Resume-safe**: skips existing entries by path

### Phase 1.5 — Readability Enrichment (COMPLETE — WRK-1277)

Classification of all 1M+ PDFs is complete (96.7% coverage):
- native: 623,455 (60.3%) | machine: 278,899 (27.0%) | ocr-needed: 92,042 (8.9%)
- remaining errors: 6,221 (0.6%) — corrupt/missing/timeout edge cases

```bash
uv run --no-project python scripts/data/document-index/enrich-readability.py \
    --workers 10 --resume
```
- **Output**: updates index.jsonl records with `readability` field
- **Resume-safe**: `--resume` skips already-classified entries
- **Method**: pdftotext (poppler) via subprocess — NOT pdfplumber (see WARNING below)

> **WARNING (WRK-1277)**: pdfplumber in multiprocessing hangs in kernel D-state on
> NTFS/NFS mounts. Use pdftotext via `subprocess.run(timeout=30)` for batch work.
> See `pdf/pdftotext-poppler` sub-skill for proven code pattern.

### Phase 2 — Readability-Aware Deep Extraction

Deep extraction is split by readability classification:
- **Phase 2a**: machine-readable docs (pdftotext for text, pdfplumber for tables on single docs) — ~279K docs
- **Phase 2b**: OCR docs (~92K docs) — requires OCR preprocessing before extraction
- Yield assessment script: `assess-deep-extraction-yield.py` evaluates extraction quality across strata

### Phase B — Extract + classify (LLM)

**Non-ASTM orgs** (API, DNV, ISO, etc.) — LLM via Codex CLI:
```bash
# From INSIDE Codex (unset Codex to avoid nesting):
env -u Codex uv run --no-project python \
    scripts/data/document-index/phase-b-Codex-worker.py \
    --shard 0 --total 1 --source og_standards --org API

# From SEPARATE terminal — parallel shards:
bash scripts/data/document-index/launch-batch.sh 10 og_standards
# With org filter:
bash scripts/data/document-index/launch-batch.sh 2 og_standards API
```

**ASTM docs** — deterministic (no LLM, $0):
```bash
uv run --no-project python scripts/data/document-index/phase_b_astm_classifier.py
# Dry run first:
uv run --no-project python scripts/data/document-index/phase_b_astm_classifier.py --dry-run --limit 50
```

**Validate ASTM accuracy** (requires prior LLM run on sample):
```bash
# Step 1: LLM-classify 100 ASTM docs in validate mode
env -u Codex uv run --no-project python \
    scripts/data/document-index/phase-b-Codex-worker.py \
    --shard 0 --total 1 --source og_standards --org ASTM \
    --include-all --validate --limit 100
# Step 2: Compare deterministic vs LLM
uv run --no-project python scripts/data/document-index/phase-b-astm-validate.py
```

**Checkpoint** (run after each batch):
```bash
uv run --no-project python scripts/data/document-index/phase_b_checkpoint.py \
    --source og_standards --label "batch-name"
```

### Phase C — Domain classification
```bash
uv run --no-project python scripts/data/document-index/phase-c-classify.py
```
- **Output**: `data/document-index/enhancement-plan.yaml`

### Phase D — Data source specs (legal-gated)
```bash
uv run --no-project python scripts/data/document-index/phase-d-data-sources.py
```

### Phase E — Backpopulate index
```bash
uv run --no-project python scripts/data/document-index/phase-e-backpopulate.py
```

### Phase F — Generate gap WRKs
```bash
uv run --no-project python scripts/data/document-index/phase-f-gap-wrk-generator.py
```

### Phase G — Build ledger
```bash
uv run --no-project python scripts/data/document-index/build-ledger.py
```

## Mounted Sources (11 total, updated 2026-04-03)

Registry: `data/document-index/mounted-source-registry.yaml`

| Source ID | Mount | Type | Notes |
|-----------|-------|------|-------|
| workspace_hub_local | /mnt/local-analysis/workspace-hub | local | In-repo canonical |
| ace_standards_local | /mnt/ace/docs/_standards | local | Symlink to O&G-Standards (17 orgs) |
| og_standards_local | /mnt/ace/0000 O&G | local | Legacy standards |
| ace_project_local | /mnt/ace/docs | local | 119 project folders + conferences/ |
| research_literature_local | /mnt/ace-data/digitalmodel/docs/domains | local | Domain PDFs |
| riser_eng_job_local | /mnt/ace/digitalmodel/.../riser-eng-job | local | 15,449 riser files |
| dde_project_remote | env: DDE_PROJECT_REMOTE_ROOT | remote | Fallback to cache |
| dde_standards_remote | /mnt/remote/ace-linux-2/dde/0000 O&G | remote | 36 org dirs (ASME,AWS,NACE,ASCE,HSE,IEC migrated to ACE 2026-04) |
| dde_literature_remote | /mnt/remote/ace-linux-2/dde/Literature | remote | 33 topic dirs, 11K+ files |
| dde_engineering_remote | /mnt/remote/ace-linux-2/dde | remote | MATLAB VIV code, OrcaFlex models |
| api_metadata_virtual | api://worldenergydata | api | API metadata |

### Conference Paper Indexing (38,526 files — 0% indexed)

```bash
# Generate batch file from catalog (high-priority conferences only)
uv run --no-project python scripts/data/document-index/prep-conference-index.py --priority-only
# Output: data/document-index/conference-index-batch.jsonl (21,346 files)
# Catalog: data/document-index/conference-paper-catalog.yaml
# Then feed into Phase A for indexing
```

### Cross-Drive Dedup Audit

```bash
# Dry run (file counts only — fast, validates mount access)
uv run --no-project python scripts/data/document-index/cross-drive-dedup-audit.py --dry-run
# Full audit (SHA-256 on name+size matches — ~30 min due to SSHFS)
uv run --no-project python scripts/data/document-index/cross-drive-dedup-audit.py
# Output: data/document-index/cross-drive-dedup-report.json
```

### Knowledge Map Quick Reference

- `docs/document-intelligence/mount-drive-knowledge-map.md` — complete 4-mount catalog with "Where Is...?" guide
- `docs/document-intelligence/dde-drive-catalog.md` — DDE drive inventory (18 unique standards orgs, MATLAB code)
- `docs/document-intelligence/data-intelligence-map.md` — master registry of all data artifacts
- `data/document-index/dde-standards-inventory.yaml` — DDE vs ACE standards comparison (21 missing orgs)
- `data/document-index/conference-paper-catalog.yaml` — 30 conferences classified by domain + priority

## Key Patterns

### Codex CLI inside Codex
The `Codex` CLI cannot run nested inside Codex. Two options:
1. **`env -u Codex`** — unset the guard variable (works for background tasks)
2. **Separate terminal** — run `launch-batch.sh` from a non-Codex shell

### Resume safety
All Phase B scripts are resume-safe: `needs_llm(sha)` checks if `discipline` already
exists in `summaries/<sha>.json`. Re-running skips already-classified docs.

### Org filtering (Phase B)
```
--org API          # process only API standards
--org Unknown      # process only Unknown org
--include-all      # include ASTM/Unknown (normally excluded)
--validate         # write to llm_discipline (don't overwrite discipline)
```

### Budget tracking
- Haiku: ~$0.002/doc
- Daily cap: $20
- Total budget: $200
- ASTM deterministic: $0 (prefix mapping)

## Verification

```bash
# Count classified og_standards docs
uv run --no-project python -c "
import sqlite3, json; from pathlib import Path
conn = sqlite3.connect('/mnt/ace/O&G-Standards/_inventory.db')
rows = conn.execute('SELECT content_hash FROM documents WHERE is_duplicate=0').fetchall()
s = Path('data/document-index/summaries')
done = sum(1 for (h,) in rows if h and (s/f'{h}.json').exists() and json.loads((s/f'{h}.json').read_text()).get('discipline'))
print(f'{done}/{len(rows)} classified')
"
```

## Script Inventory

| Script | Deterministic | Lines | Purpose |
|--------|:---:|------:|---------|
| phase-a-index.py | Yes | 373 | Corpus scan → index.jsonl |
| phase-b-extract.py | Yes | 313 | Text extraction (no LLM) |
| phase_b_astm_classifier.py | Yes | 266 | ASTM prefix → discipline |
| phase_b_checkpoint.py | Yes | 154 | Batch stats report |
| phase-b-Codex-worker.py | **LLM** | 423 | Codex CLI batch worker |
| phase-b-astm-validate.py | Yes | 153 | Compare det vs LLM |
| launch-batch.sh | Orch | 70 | Parallel shard launcher |
| phase-c-classify.py | Heuristic | 345 | Domain classification |
| phase-d-data-sources.py | Yes | 283 | Per-repo data source specs |
| phase-e-backpopulate.py | Yes | 222 | Backfill index.jsonl fields |
| phase-e2-remap.py | Yes | 506 | Targeted reclassification |
| enrich-readability.py | Yes | — | PDF readability classification (machine/ocr/mixed/error) |
| assess-deep-extraction-yield.py | Yes | — | Evaluate deep extraction quality across strata |
| phase-f-gap-wrk-generator.py | Yes | 398 | Gap → WRK items |
| build-ledger.py | Yes | 380 | Standards transfer ledger |
| query-ledger.py | Yes | 125 | Ledger query tool |

**Deterministic: 14/16 scripts (88%). LLM-dependent: 2/16 (12%).**