gibsgraph 0.2.0

GraphRAG + LangGraph agent for intelligent knowledge graph reasoning over Neo4j

GibsGraph

Natural language queries for any Neo4j graph — automatically. Built by Victor Gibson at Gibbr AB

GibsGraph connects to any Neo4j knowledge graph, auto-discovers its schema, and lets you ask questions in plain English. It generates Cypher automatically, retrieves the relevant subgraph, and returns a grounded answer — with the Cypher shown so you can verify what was queried.

Roadmap | Changelog | Contributing

---

What it does (v0.1.1)

• Natural language queries — ask anything about your Neo4j graph
• Auto schema discovery — connects and learns your graph structure automatically
• Dual retrieval — vector search (when index exists) with text-to-Cypher fallback
• Cypher self-healing — if generated Cypher fails, the error is sent back to the LLM for correction
• Cypher transparency — see exactly what was queried
• Visualization — Mermaid diagrams and Neo4j Bloom deep links
• Secure by default — read-only transactions, parameterized Cypher, injection validation
• LLM flexibility — OpenAI and Anthropic supported, auto-detected from env keys

Planned (not yet implemented)

• Text-to-graph ingestion (g.ingest())
• G-Retriever GNN reasoning
• PCST subgraph pruning

---

Quick start

pip install git+https://github.com/gibbrdev/gibsgraph.git

from gibsgraph import Graph

# Connect — auto-detects LLM from your env keys
g = Graph("bolt://localhost:7687", password="your-password")

# Ask anything
result = g.ask("What movies did Tom Hanks act in?")
print(result)              # the answer
print(result.cypher)       # Cypher that was run
print(result.confidence)   # 0.0-1.0
print(result.visualization) # Mermaid diagram string

g.close()  # or use: with Graph(...) as g:

---

Configuration

Set environment variables (or pass them directly):

export NEO4J_URI=bolt://localhost:7687
export NEO4J_PASSWORD=your_password
export OPENAI_API_KEY=sk-...     # or ANTHROPIC_API_KEY

Or use a .env file — copy .env.example to get started.

---

Installation

pip install git+https://github.com/gibbrdev/gibsgraph.git

Optional extras:

pip install "gibsgraph[gnn]"    # G-Retriever GNN (needs GPU/CUDA)
pip install "gibsgraph[ui]"     # Streamlit demo UI
pip install "gibsgraph[full]"   # everything including dev tools

Docker

cp .env.example .env
# Edit .env with your Neo4j password and API key
docker compose up
# Open http://localhost:8501

---

Architecture

User Query
    |
    v
LangGraph Agent (agent.py)
    +-- retrieval/     <- Auto schema discovery + text-to-Cypher + vector search
    +-- tools/         <- Cypher validator, Mermaid visualizer
    +-- kg_builder/    <- Text to Neo4j (planned)
    +-- gnn/           <- G-Retriever inference (planned)
    |
    v
Neo4j Knowledge Graph

---

Examples

Example	Description
examples/regulatory_kg.py	EU regulatory knowledge graph (gibs.dev use case)

---

Testing

pytest                          # All tests
pytest tests/unit/              # Unit only
pytest tests/integration/       # Integration (requires Neo4j)
pytest --cov --cov-report=html  # With coverage report

Stress tests against the Neo4j Movies dataset: 11/11 queries passing (100%).

---

Contributing

Contributions welcome! Please read CONTRIBUTING.md first.

pip install -e ".[dev]"
ruff check src/ tests/
mypy src/gibsgraph
pytest

---

License

MIT — see LICENSE

---

Acknowledgements

Built on:

• neo4j-graphrag-python
• LangGraph
• G-Retriever (He et al., 2024)