We added a keyword retrieval path to complement vector retrieval. Exact terms, identifiers, file names, and policy phrases often need lexical matching.
This path exists because semantic retrieval alone is not sufficient for every question. Hybrid orchestration can use both signals where appropriate.
Retrieval stitching work was added to join evidence from multiple retrieval paths without losing source boundaries.
Reranker selection work was added to keep evidence ordering separate from initial retrieval.
We clarified the boundary between conversation memory, retrieved evidence, and answer synthesis in the Agentic RAG runtime.