raglineage 0.2.2

Lineage-aware RAG engine for auditable, reproducible, versioned retrieval and answers

raglineage

Lineage-aware RAG engine for auditable, reproducible, versioned retrieval and answers

Most RAG tools store text chunks and embeddings. They lose provenance and cannot explain answer drift.

raglineage treats RAG as a data lineage and provenance problem, not just vector search. Every retrievable unit is a Lineage Node (LN) with:

• Immutable ID and dataset version
• Precise source reference (file path, page, row, URL, etc.)
• Full transform chain (ordered list of transforms applied)
• Content hash for integrity
• Timestamps for auditing

The system maintains a Lineage Graph (DAG) linking nodes through structural and semantic relationships, enabling:

• Dataset versioning and diffing
• Incremental rebuilds (only recompute what changed)
• Answer auditing (reconstruct provenance of any answer)
• Version consistency checks
• Staleness detection

This is not a LangChain/LlamaIndex wrapper—it's a first-class lineage system.

Architecture

┌─────────────────────────────────────────────────────────────┐
│                      Data Sources                            │
│  (PDFs, CSVs, JSON, APIs, Text Files)                       │
└──────────────────────┬──────────────────────────────────────┘
                       │
                       ▼
┌─────────────────────────────────────────────────────────────┐
│                    Ingestion Layer                           │
│  AutoIngestor → FileIngestor → TabularIngestor              │
└──────────────────────┬──────────────────────────────────────┘
                       │
                       ▼
┌─────────────────────────────────────────────────────────────┐
│                   Transform Layer                            │
│  Chunkers → Dedupe → Normalize                              │
│  (Each transform recorded in transform_chain)               │
└──────────────────────┬──────────────────────────────────────┘
                       │
                       ▼
┌─────────────────────────────────────────────────────────────┐
│              Lineage Node Creation                           │
│  ln_id, source, transform_chain, content_hash, version      │
└──────────────────────┬──────────────────────────────────────┘
                       │
                       ▼
┌─────────────────────────────────────────────────────────────┐
│              Lineage Graph (DAG)                             │
│  networkx DAG: nodes=LN, edges=relationships                │
└──────────────────────┬──────────────────────────────────────┘
                       │
                       ▼
┌─────────────────────────────────────────────────────────────┐
│              Embedding + Vector Store                        │
│  Embeddings → FAISS Store → LN ID Mapping                   │
└──────────────────────┬──────────────────────────────────────┘
                       │
                       ▼
┌─────────────────────────────────────────────────────────────┐
│              Retrieval + Audit                               │
│  Query → Top-K → Graph Walk → Answer + Lineage             │
│  Audit → Version Check → Staleness → Risk Flags             │
└─────────────────────────────────────────────────────────────┘

Lineage Node Example

Every retrievable chunk is a Lineage Node with complete provenance:

{
  "ln_id": "ln_92af",
  "content": "Revenue declined due to supply constraints",
  "source": {
    "type": "pdf",
    "uri": "data/10Q_Q3_2023.pdf",
    "page": 14,
    "section": "Management Discussion"
  },
  "dataset_version": "v3.1",
  "transform_chain": [
    "pdf_parse",
    "section_split",
    "semantic_chunk",
    "deduplicate"
  ],
  "content_hash": "sha256:a3f5b8c9d2e1f4a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0",
  "created_at": "2026-01-20T00:00:00Z"
}

Audited Answer Example

Every answer includes full lineage and audit metadata:

{
  "question": "Why did revenue fall in Q3?",
  "answer": "Revenue declined primarily due to supply constraints affecting shipments.",
  "lineage": [
    {
      "ln_id": "ln_92af",
      "score": 0.91,
      "source": {
        "uri": "data/10Q_Q3_2023.pdf",
        "page": 14
      },
      "dataset_version": "v3.1",
      "transform_chain": ["pdf_parse","section_split","semantic_chunk","deduplicate"]
    }
  ],
  "audit": {
    "staleness_check": "pass",
    "version_consistency": "single_version",
    "transform_risk_flags": []
  }
}

Quickstart

Installation

pip install raglineage

Basic Usage

from raglineage import RagLineage

rag = RagLineage(
    source="examples/data",
    store_backend="faiss",
    embed_backend="local"
)

# Build initial version
rag.build(version="v1.0")

# Query with lineage
ans = rag.query("What is the refund policy?", k=5)
print(ans.model_dump_json(indent=2))

# Audit the answer
report = rag.audit(ans)
print(report.model_dump_json(indent=2))

CLI Usage

# Initialize a project
raglineage init ./my_project

# Build from source
raglineage build --source ./data --version v1.0

# Update incrementally
raglineage update --source ./data --version v1.1 --changed-only

# Query
raglineage query "What is the refund policy?" --k 5

# Diff versions
raglineage diff v1.0 v1.1

Comparison with Other RAG Tools

Feature	raglineage	LangChain	LlamaIndex
Lineage Tracking	First-class	Not built-in	Not built-in
Dataset Versioning	Native	Manual	Manual
Incremental Updates	Automatic	Full rebuild	Full rebuild
Answer Auditing	Built-in	Manual	Manual
Transform Chain Tracking	Every LN	Not tracked	Not tracked
Version Diffing	Structured	Not available	Not available
Graph Relationships	DAG-based	Optional	Optional
Source Provenance	Complete	Basic	Basic

Key Difference: raglineage treats lineage as a core requirement, not an afterthought. Every operation preserves and tracks provenance.

Core Concepts

Lineage Nodes (LN)

A Lineage Node is the atomic unit of retrieval. Each LN has:

• ln_id: Stable, deterministic identifier
• content: The actual text content
• source: Precise reference to origin (file, page, row, etc.)
• dataset_version: Version tag for the dataset
• transform_chain: Ordered list of transforms applied
• content_hash: SHA-256 hash for integrity
• timestamps: Created/updated timestamps

Lineage Graph

A directed acyclic graph (DAG) where:

• Nodes: Lineage Node IDs
• Edges: Typed relationships (adjacent, semantic, references, same_entity, etc.)

Enables graph-walk retrieval and relationship exploration.

Dataset Versioning

Each dataset build produces a versioned manifest:

• Tracks all source files and their hashes
• Enables diffing between versions
• Supports incremental updates (only recompute changed files)

Answer Auditing

Every answer includes:

• Lineage: List of LNs used with scores and metadata
• Audit Report:
  • Version consistency check
  • Staleness detection
  • Transform risk flags

Requirements

• Python ≥ 3.10
• Strict type hints throughout
• Pydantic models for schemas
• NetworkX for graph operations
• FAISS for vector storage
• Sentence-transformers for local embeddings

Development

# Clone repository
git clone https://github.com/PranavMotarwar/raglineage.git
cd raglineage

# Install in development mode
pip install -e ".[dev]"

# Run tests
pytest

# Run linting
ruff check .

Contributing

See CONTRIBUTING.md for guidelines.

License

Apache-2.0 License. See LICENSE for details.

Author

Pranav Motarwar - GitHub

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raglineage - Where every answer has a traceable origin.