# Librarian Integration Guide

**How The Scheduler (Librarian) interacts with Library Desk for documentation management**

## Overview

The Scheduler's documentation mirroring tasks feed content into The Library system via Library Desk API. This creates a knowledge graph and vector index of all documentation for semantic search and relationship discovery.

## Architecture Flow

```
┌─────────────────┐
│  The Scheduler  │ (The Librarian)
│   (scheduler)   │
└────────┬────────┘
         │ 1. Mirror docs from sources
         │    (GitHub, Gitea, etc.)
         ↓
┌─────────────────┐
│   Gitea Repo    │
│  docs-mirror/*  │
└────────┬────────┘
         │ 2. Ingest to Library
         ↓
┌─────────────────┐
│  Library Desk   │ (Coordination API)
│  (library-desk) │
└────────┬────────┘
         │ 3. Process & Index
         ├──→ Neo4j (relationships)
         ├──→ Qdrant (embeddings)
         └──→ Wiki.js (dossiers)
```

## Required Endpoints

### 1. Document Ingestion

**POST /ingest/document**
```json
{
  "source": "github",
  "repository": "anthropics/anthropic-cookbook",
  "path": "skills/citation/guide.md",
  "content": "# Citation Guide\n...",
  "metadata": {
    "commit_sha": "abc123",
    "author": "Anthropic",
    "updated_at": "2025-12-08T10:30:00Z",
    "gitea_mirror_path": "docs-mirror/anthropic-cookbook/skills/citation/guide.md",
    "language": "markdown",
    "tags": ["skills", "citation", "prompting"]
  }
}
```

**Response:**
```json
{
  "document_id": "doc_abc123xyz",
  "status": "processing",
  "operations": {
    "chunking": "pending",
    "embedding": "pending",
    "entity_extraction": "pending",
    "graph_indexing": "pending"
  },
  "estimated_completion": "2025-12-08T10:30:15Z"
}
```

### 2. Batch Ingestion

**POST /ingest/batch**
```json
{
  "source": "github",
  "repository": "anthropics/anthropic-cookbook",
  "documents": [
    {
      "path": "skills/citation/guide.md",
      "content": "...",
      "metadata": {...}
    },
    {
      "path": "skills/summarization/techniques.md",
      "content": "...",
      "metadata": {...}
    }
  ]
}
```

**Response:**
```json
{
  "batch_id": "batch_xyz789",
  "total_documents": 2,
  "status": "processing",
  "documents": [
    {"document_id": "doc_1", "status": "queued"},
    {"document_id": "doc_2", "status": "queued"}
  ]
}
```

### 3. Document Status Check

**GET /ingest/status/{document_id}**

**Response:**
```json
{
  "document_id": "doc_abc123xyz",
  "status": "completed",
  "operations": {
    "chunking": "completed",
    "embedding": "completed",
    "entity_extraction": "completed",
    "graph_indexing": "completed"
  },
  "results": {
    "chunks_created": 12,
    "vectors_indexed": 12,
    "entities_extracted": 8,
    "relationships_created": 15
  },
  "completed_at": "2025-12-08T10:30:14Z"
}
```

### 4. Content Update Detection

**POST /ingest/check-updates**
```json
{
  "documents": [
    {
      "path": "docs-mirror/anthropic-cookbook/skills/citation/guide.md",
      "content_hash": "sha256:abc123...",
      "updated_at": "2025-12-08T10:30:00Z"
    }
  ]
}
```

**Response:**
```json
{
  "updates_needed": [
    {
      "path": "docs-mirror/anthropic-cookbook/skills/citation/guide.md",
      "reason": "content_changed",
      "last_indexed": "2025-12-07T10:30:00Z",
      "action": "re-index"
    }
  ],
  "up_to_date": [],
  "new_documents": []
}
```

### 5. Deduplication Check

**POST /deduplicate/check**
```json
{
  "document_id": "doc_abc123xyz",
  "similarity_threshold": 0.85
}
```

**Response:**
```json
{
  "duplicates": [
    {
      "document_id": "doc_def456",
      "similarity": 0.92,
      "path": "docs-mirror/claude-docs/citation-best-practices.md",
      "overlap_summary": "Both documents cover citation formatting"
    }
  ],
  "suggestions": {
    "action": "merge_or_cross_reference",
    "confidence": 0.88
  }
}
```

### 6. Repository Sync Status

**GET /ingest/repo-status/{repository_name}**

**Response:**
```json
{
  "repository": "anthropic-cookbook",
  "total_documents": 156,
  "indexed_documents": 156,
  "pending_updates": 0,
  "failed_documents": 0,
  "last_sync": "2025-12-08T03:00:00Z",
  "next_scheduled_sync": "2025-12-09T03:00:00Z"
}
```

## Scheduler Integration Workflow

### Phase 1: Mirror Documentation (Current)
```python
# This already exists in the Scheduler
async def mirror_documentation():
    """Mirror docs from external sources to Gitea"""
    repos = [
        "anthropics/anthropic-cookbook",
        "anthropics/prompt-eng-interactive-tutorial",
        # ... etc
    ]

    for repo in repos:
        # Clone/pull to /docs-mirror/{repo-name}
        await git_sync(repo, f"/docs-mirror/{repo}")
```

### Phase 2: Index to Library (New)
```python
async def index_to_library():
    """Send mirrored docs to Library Desk for indexing"""

    # Get list of documents in docs-mirror
    docs_path = Path("/docs-mirror")

    for repo_dir in docs_path.iterdir():
        if not repo_dir.is_dir():
            continue

        # Find all markdown files
        md_files = list(repo_dir.rglob("*.md"))

        # Check what needs updating
        update_check = await check_library_updates(md_files)

        if update_check["updates_needed"]:
            # Batch ingest updated documents
            await batch_ingest_documents(
                repository=repo_dir.name,
                documents=update_check["updates_needed"]
            )

            # Wait for processing to complete
            await wait_for_batch_completion(batch_id)

            # Check for duplicates
            await check_and_resolve_duplicates(repo_dir.name)
```

### Phase 3: Monitor & Maintain
```python
async def maintain_library_index():
    """Periodic maintenance of Library index"""

    # Check for orphaned entries (deleted from source)
    await cleanup_orphaned_documents()

    # Update embeddings if model changed
    await refresh_embeddings_if_needed()

    # Generate relationship maps for new content
    await discover_document_relationships()
```

## Scheduler Task Definition

**New Task: `library_sync`**

```yaml
Task Name: library_sync
Description: Sync mirrored documentation to Library for indexing and search
Schedule: Daily at 03:30 (after doc mirroring at 03:00)
Priority: 15 (user maintenance)
Service: library
Executor: scheduler.tasks.library_tasks.sync_library_index
Dependencies:
  - docs_mirror (must complete first)
Configuration:
  - LIBRARY_DESK_URL: http://library-desk:8089
  - LIBRARY_API_KEY: ${LIBRARY_API_KEY}
  - BATCH_SIZE: 50
  - CHECK_UPDATES_ONLY: true
Outputs:
  - Documents indexed
  - Duplicates found
  - Relationships created
```

## API Client Example

```python
# scheduler/src/clients/library_desk.py

import httpx
from typing import List, Dict, Any
from pathlib import Path

class LibraryDeskClient:
    def __init__(self, base_url: str, api_key: str):
        self.base_url = base_url
        self.headers = {
            "Authorization": f"Bearer {api_key}",
            "Content-Type": "application/json"
        }

    async def ingest_document(
        self,
        source: str,
        repository: str,
        path: str,
        content: str,
        metadata: Dict[str, Any]
    ) -> Dict[str, Any]:
        """Ingest a single document"""
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/ingest/document",
                headers=self.headers,
                json={
                    "source": source,
                    "repository": repository,
                    "path": path,
                    "content": content,
                    "metadata": metadata
                }
            )
            response.raise_for_status()
            return response.json()

    async def batch_ingest(
        self,
        source: str,
        repository: str,
        documents: List[Dict[str, Any]]
    ) -> Dict[str, Any]:
        """Ingest multiple documents"""
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/ingest/batch",
                headers=self.headers,
                json={
                    "source": source,
                    "repository": repository,
                    "documents": documents
                },
                timeout=300.0  # 5 minutes for large batches
            )
            response.raise_for_status()
            return response.json()

    async def check_updates(
        self,
        documents: List[Dict[str, str]]
    ) -> Dict[str, Any]:
        """Check which documents need updating"""
        async with httpx.AsyncClient() as client:
            response = await client.post(
                f"{self.base_url}/ingest/check-updates",
                headers=self.headers,
                json={"documents": documents}
            )
            response.raise_for_status()
            return response.json()

    async def get_repo_status(self, repository: str) -> Dict[str, Any]:
        """Get indexing status for a repository"""
        async with httpx.AsyncClient() as client:
            response = await client.get(
                f"{self.base_url}/ingest/repo-status/{repository}",
                headers=self.headers
            )
            response.raise_for_status()
            return response.json()
```

## Typical Workflow Sequence

### Daily Documentation Sync (03:00-03:45)

1. **03:00** - Scheduler runs `docs_mirror` task
   - Pulls latest from all configured repos
   - Writes to `/docs-mirror/*`

2. **03:30** - Scheduler runs `library_sync` task
   - Scans `/docs-mirror/` for changes
   - Calls `POST /ingest/check-updates` with file hashes
   - Gets list of updated/new documents

3. **03:31-03:40** - Batch ingestion
   - Groups documents by repo
   - Calls `POST /ingest/batch` for each repo
   - Monitors `GET /ingest/status/{batch_id}`

4. **03:41-03:44** - Post-processing
   - Calls `POST /deduplicate/check` for new docs
   - Reviews duplicate suggestions
   - Logs statistics to Scheduler database

5. **03:45** - Completion
   - Scheduler marks task complete
   - Sends summary to logs
   - Updates next run time

## Error Handling

### Retry Strategy
```python
async def ingest_with_retry(document: Dict, max_retries: int = 3):
    """Ingest with exponential backoff"""
    for attempt in range(max_retries):
        try:
            result = await library_client.ingest_document(**document)
            return result
        except httpx.TimeoutException:
            if attempt < max_retries - 1:
                await asyncio.sleep(2 ** attempt)  # 1s, 2s, 4s
            else:
                # Log failure and continue
                logger.error(f"Failed to ingest {document['path']} after {max_retries} attempts")
                return None
```

### Graceful Degradation
- If Library Desk is down, queue documents for later ingestion
- Store failed ingestions in Scheduler database
- Retry failed ingestions on next run

## Metrics to Track

The Scheduler should track:
- Documents mirrored vs. documents indexed
- Average ingestion time per document
- Deduplication rate
- Failed ingestions
- Library Desk response times

These can be displayed in the Scheduler UI dashboard.

## Environment Variables

Add to Scheduler's environment:
```bash
# Library Integration
LIBRARY_DESK_URL=http://library-desk:8089
LIBRARY_API_KEY=${LIBRARY_API_KEY}
LIBRARY_BATCH_SIZE=50
LIBRARY_SYNC_ENABLED=true
```

## Maintenance Tasks

### Index Reconciliation (Daily)

The `reconcile-index` endpoint performs full index maintenance:

1. **Cleanup Phase**: Remove orphaned data
   - Vector chunks without wiki source
   - Graph nodes without vectors (bidirectional)
   - Vectors without graph nodes (bidirectional)
   - Orphan entities (no MENTIONS relationships)
   - Broken relationships

2. **Reindex Phase**: Index missing pages
   - Wiki pages without vector embeddings
   - Wiki pages without graph Document nodes

**Scheduler Task: `library_reconcile_index`**

```yaml
Task Name: library_reconcile_index
Description: Daily index reconciliation - cleanup orphans + reindex missing pages
Schedule: Daily at 04:00 (after library_sync at 03:30)
Priority: 10 (system maintenance)
Service: library
Executor: POST /maintenance/reconcile-index
Configuration:
  - LIBRARY_DESK_URL: http://library-desk:8089
  - LIBRARY_API_KEY: ${LIBRARY_API_KEY}
Parameters:
  - user: jpmschweitzer
  - dry_run: false
Outputs:
  - Vector orphans purged
  - Entity orphans purged
  - Missing pages reindexed
```

### Maintenance Endpoints

| Endpoint | Method | Purpose |
|----------|--------|---------|
| `/maintenance/reconcile-index` | POST | **Recommended**: Full cleanup + reindex missing |
| `/maintenance/cleanup/all` | POST | Cleanup only (orphan removal) |
| `/maintenance/cleanup/vectors` | POST | Clean orphan vector chunks only |
| `/maintenance/cleanup/graph` | POST | Clean orphan entities & stale docs only |
| `/maintenance/health` | GET | Lightweight health check (for uptime monitoring) |
| `/maintenance/health?detailed=true` | GET | Full analysis with orphan counts |
| `/maintenance/reindex/{page_id}` | POST | Force re-index a specific page |

### Health Check Modes

**Lightweight (default)** - Use for frequent uptime checks (every 30s):
```bash
curl "http://library-desk:8089/maintenance/health?user=jpmschweitzer" \
  -H "Authorization: Bearer ${LIBRARY_API_KEY}"
```

Returns only last cleanup timestamp and basic status (no database queries).

**Detailed** - Use for dashboards or before reconciliation:
```bash
curl "http://library-desk:8089/maintenance/health?user=jpmschweitzer&detailed=true" \
  -H "Authorization: Bearer ${LIBRARY_API_KEY}"
```

Returns full orphan analysis (runs database queries).

### Example Reconcile Request

```bash
curl -X POST "http://library-desk:8089/maintenance/reconcile-index?user=jpmschweitzer" \
  -H "Authorization: Bearer ${LIBRARY_API_KEY}"
```

### Example Response

```json
{
  "success": true,
  "cleanup": {
    "success": true,
    "vector_cleanup": {
      "wiki_chunks": {"orphans_found": 5, "orphans_purged": 5},
      "document_chunks": {"orphans_found": 0, "orphans_purged": 0},
      "chunks_without_graph": {"orphans_found": 2, "orphans_purged": 2},
      "total_chunks_scanned": 1250,
      "total_orphans_purged": 7
    },
    "graph_cleanup": {
      "orphan_entities": {"orphans_found": 3, "orphans_purged": 3},
      "stale_wiki_documents": {"orphans_found": 1, "orphans_purged": 1},
      "stale_store_documents": {"orphans_found": 0, "orphans_purged": 0},
      "docs_without_vectors": {"orphans_found": 0, "orphans_purged": 0},
      "broken_relationships_cleaned": 0
    },
    "total_duration_ms": 1523.5
  },
  "reindex_missing": {
    "pages_without_vectors": 2,
    "pages_without_graph": 1,
    "pages_reindexed": 2,
    "pages_failed": 0,
    "failed_page_ids": [],
    "duration_ms": 3421.2
  },
  "total_duration_ms": 4944.7
}
```

### Scheduler Integration Code

```python
# scheduler/src/tasks/library_maintenance.py

async def library_reconcile_index_task(user: str = "jpmschweitzer"):
    """Run daily Library Desk index reconciliation."""

    async with httpx.AsyncClient() as client:
        # Run reconcile-index (cleanup + reindex missing)
        result = await client.post(
            f"{LIBRARY_DESK_URL}/maintenance/reconcile-index",
            params={"user": user, "dry_run": False},
            headers={"Authorization": f"Bearer {LIBRARY_API_KEY}"},
            timeout=600.0  # 10 minutes for large indexes
        )

        data = result.json()

        # Log summary
        cleanup = data["cleanup"]
        reindex = data["reindex_missing"]

        logger.info(
            f"Reconcile complete: "
            f"{cleanup['vector_cleanup']['total_orphans_purged']} vector orphans, "
            f"{cleanup['graph_cleanup']['orphan_entities']['orphans_purged']} entity orphans, "
            f"{reindex['pages_reindexed']} pages reindexed"
        )

        if reindex["pages_failed"] > 0:
            logger.warning(f"Failed to reindex pages: {reindex['failed_page_ids']}")

        return data
```

---

## Next Steps

1. Implement ingestion endpoints in Library Desk
2. Add LibraryDeskClient to Scheduler
3. Create `library_sync` task in Scheduler
4. Test with small batch of documents
5. Monitor and tune performance
6. Expand to full documentation corpus

## Benefits

- **Automatic Knowledge Base**: All mirrored docs automatically indexed
- **Semantic Search**: Find docs by meaning, not just keywords
- **Relationship Discovery**: Understand connections between docs
- **Deduplication**: Identify overlapping content across repos
- **HybridRAG Ready**: Knowledge graph + vectors enable advanced AI queries