---
id: T01
parent: S04
milestone: M019
provides: []
requires: []
affects: []
key_files: ["backend/scripts/reindex_lightrag.py"]
key_decisions: ["Used httpx instead of requests (requests unavailable in API container)", "file_source format: technique:{slug} for deterministic resume", "Serial submission with pipeline polling between docs"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Dry-run with --limit 3 exited 0 and printed formatted text for 3 pages. Live submission with --limit 2 processed both pages through LightRAG entity extraction (visible in pipeline status: 30 Ent + 26 Rel per chunk). Status counts confirmed increase from 2→4 processed documents."
completed_at: 2026-04-03T22:37:24.032Z
blocker_discovered: false
---

# T01: Created reindex_lightrag.py that extracts technique pages from PostgreSQL, formats as rich text, and submits to LightRAG API with resume support and pipeline polling

> Created reindex_lightrag.py that extracts technique pages from PostgreSQL, formats as rich text, and submits to LightRAG API with resume support and pipeline polling

## What Happened
---
id: T01
parent: S04
milestone: M019
key_files:
  - backend/scripts/reindex_lightrag.py
key_decisions:
  - Used httpx instead of requests (requests unavailable in API container)
  - file_source format: technique:{slug} for deterministic resume
  - Serial submission with pipeline polling between docs
duration: ""
verification_result: passed
completed_at: 2026-04-03T22:37:24.033Z
blocker_discovered: false
---

# T01: Created reindex_lightrag.py that extracts technique pages from PostgreSQL, formats as rich text, and submits to LightRAG API with resume support and pipeline polling

**Created reindex_lightrag.py that extracts technique pages from PostgreSQL, formats as rich text, and submits to LightRAG API with resume support and pipeline polling**

## What Happened

Built backend/scripts/reindex_lightrag.py — a standalone script that connects to PostgreSQL using the sync engine pattern, queries TechniquePage with eager-loaded Creator and KeyMoment relations, formats each as structured text (title, creator, category, tags, plugins, summary, body sections for both v1/v2 formats, key moments), and submits via LightRAG POST /documents/text. Resume support fetches existing file_paths from GET /documents, skipping already-processed technique:{slug} entries. Pipeline polling waits for busy=false between submissions. Used httpx instead of requests since the container image doesn't have requests installed.

## Verification

Dry-run with --limit 3 exited 0 and printed formatted text for 3 pages. Live submission with --limit 2 processed both pages through LightRAG entity extraction (visible in pipeline status: 30 Ent + 26 Rel per chunk). Status counts confirmed increase from 2→4 processed documents.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `ssh ub01 'docker exec chrysopedia-api python3 /app/scripts/reindex_lightrag.py --dry-run --limit 3'` | 0 | ✅ pass | 2000ms |
| 2 | `ssh ub01 'docker exec chrysopedia-api python3 /app/scripts/reindex_lightrag.py --limit 2 -v'` | 0 | ✅ pass | 591700ms |
| 3 | `ssh ub01 'curl -sf http://localhost:9621/documents/status_counts'` | 0 | ✅ pass (processed: 2→4) | 500ms |


## Deviations

Used httpx instead of requests (not in container image). Deployed via docker cp instead of image rebuild.

## Known Issues

Script deployed via docker cp — not yet in Dockerfile.api COPY instructions, so it won't persist across image rebuilds.

## Files Created/Modified

- `backend/scripts/reindex_lightrag.py`


## Deviations
Used httpx instead of requests (not in container image). Deployed via docker cp instead of image rebuild.

## Known Issues
Script deployed via docker cp — not yet in Dockerfile.api COPY instructions, so it won't persist across image rebuilds.
