Capstone Project: Designing an Enterprise-Grade Graph RAG System

Congratulations! You have navigated the entire landscape of Graph RAG. You have learned the math, the storage, the querying, the reasoning, and the infrastructure. Now, it is time for your final test: the Capstone Project.

In this final lesson, you will not follow a tutorial. You will be the Lead Architect. You will design a complete, end-to-end Graph RAG system for a complex domain of your choice (e.g., Medical diagnosis, Financial fraud, or Global supply chain). Your goal is to produce a Technical Blueprint that addresses the 5 pillars of production Graph RAG.

1. The Challenge Scope

Choose one of these scenarios:

The Medical Brain: A system for doctors to cross-reference patient symptoms against billions of nodes in medical research and genomic data.
The Legal Guardian: A system for law firms to find "Precedent Paths" across thousands of cases and jurisdictions.
The Supply Chain Oracle: A system for global logistics to predict and reroute shipments based on a global dependency graph.

2. The Blueprint Requirements

Your final design document must include the following sections:

Section A: The Schema (Module 5)

Define your core nodes and relationships. What is the "Entity Granularity"? How do you handle temporal data?

Section B: The Ingestion Pipeline (Module 6 & 17)

Will you use a Batch or Streaming approach? How will you handle Entity Resolution and PII hashing?

Section C: The Retrieval Strategy (Module 9 & 10)

How will you perform the "Initial Entry"? (Vector? Structured SQL?). What is your multi-hop reasoning loop?

Section D: The Security Model (Module 15)

How will you implement RBAC and Audit trails? What is your strategy for data redaction?

Section E: The Performance & Ops Plan (Module 17)

How will you monitor for "Logic Drift"? What is your Tiering strategy (Hot/Warm/Cold)?

3. The "Graph-Grounded" Answer Check (Module 12)

Describe how your system will handle a specific multi-hop question.

Example Question: "If Factory X in China closes, which US hospitals will run out of Heart Valves in 30 days?"
Describe the Path: Factory -> Part -> Product -> Shipment -> Customer.
Explain the Reasoning Loop: How does the agent walk these 4 hops?

4. Final Submission Checklist

Does your schema support multi-hop reasoning?
Do you have a plan for "Conflicting Facts"?
Is your system GDPR/HIPAA compliant?
Can you visualize the path for the end-user?
Have you accounted for Token Limits during graph expansion?

5. Course Wrap-Up

You are now a Graph RAG Architect. You have moved from "Chatting with PDFs" to "Reasoning with the World's Knowledge." This is one of the most valuable skills in the AI era. As datasets grow larger and more complex, companies will stop looking for the "Best Prompt" and start looking for the Best Graph.

Go forth and build the "Internal Brains" for the organizations that need them most. The network of knowledge is yours to command.

Final Exercise: Share your capstone blueprint with a peer or mentor. The best way to verify a graph design is to have someone else try to "Break" the logic.

Thank you for completing "Graph RAG: From Foundations to Production-Ready Systems."