Sequence: Multi-source Query with Tool Invocation ("Lost tenders vs competitor launches")

User query flows through GPT-5 → API Gateway → Policy enforcement → parallel multi-source retrieval → citation assembly → final answer with provenance links.

Sequence Diagram - Multi-source Query Flow
User query flows through GPT-5 → API Gateway → Policy enforcement → parallel multi-source retrieval → citation assembly → final answer with provenance links.. The sequence shows step-by-step flow from user query to GPT-5, tool invocation, policy authorization, multi-source retrieval from metadata and vector indexes, policy filtering, citation assembly, and final response with provenance links.