topic-rag 1.0.3

Lightweight topic-aware document processing and retrieval

topic-rag — Topic-Enhanced Retrieval-Augmented Generation

Install it anywhere with:

pip install topic-rag

What it does

Standard RAG systems retrieve documents purely by text similarity (TF-IDF cosine distance). topic-rag adds a second signal — it automatically discovers hidden topics across your document collection and uses those topics to boost retrieval accuracy. A query about "neural networks" will score higher against documents that share that topic cluster, even if the exact words differ.

Quick Start

from topic_rag import DocumentProcessor, TopicEnhancedRAGRetriever

# Build a topic-aware corpus from your documents
processor = DocumentProcessor(n_topics=10)
corpus = processor.process_corpus(documents)   # list of {id, text, title}

# Retrieve with topic enhancement
retriever = TopicEnhancedRAGRetriever(corpus)
results = retriever.retrieve("What is transfer learning?", k=5)

for r in results:
    print(f"[{r['score']:.4f}] {r['sentence']}")

Two Retrieval Modes

Retriever	How it works
StandardRAGRetriever	Ranks by TF-IDF cosine similarity only
TopicEnhancedRAGRetriever	Combines TF-IDF similarity + latent topic overlap for better context-aware ranking

Use both side by side to compare standard vs topic-enhanced retrieval on your own data:

from topic_rag import DocumentProcessor, StandardRAGRetriever, TopicEnhancedRAGRetriever

processor = DocumentProcessor(n_topics=10)
corpus = processor.process_corpus(documents)

std_retriever = StandardRAGRetriever(corpus)
enh_retriever = TopicEnhancedRAGRetriever(corpus)

std_results = std_retriever.retrieve("my query", k=5)
enh_results = enh_retriever.retrieve("my query", k=5)

Key Design Decisions

• No GPU required — uses TF-IDF and a lightweight NMF-based topic model (no PyTorch, no sentence-transformers)
• Minimal dependencies — only numpy and scikit-learn at the core
• Self-contained — no external API calls or downloads needed

License

This project is licensed under the GNU Affero General Public License v3.0 (AGPL-3.0).

See the LICENSE file for the full license text.

What AGPL-3.0 means

• Anyone can view, use, and modify the code
• Any modified version used to provide a network service must release its source code
• Companies cannot embed this in proprietary software without open-sourcing their product

For commercial licensing enquiries, please contact the project maintainers.