Agent startup and graph rag nodes both run an interactive wizard when their
knowledge base has not been built, but neither offered the driver choice that
interactive named-RAG creation has, so both silently produced a yaml store.
A plain agent was the worse of the two: AgentConfig carries only documents, so
there was no way to get a duckdb RAG for one, interactively or declaratively. A
graph node could at least declare driver: in the workflow.
Agent startup now passes prompt_for_driver, and a rag node whose wizard runs is
asked too. The prompt is skipped when the node already declares a driver, and
sits inside the not-fully-specified branch after the non-interactive bail, so
declarative workflows and headless runs are unchanged. Temp RAGs still pass
false: they are deleted on the next run, so a persistent store would only leave
a sidecar behind.
The prompt moves to select_rag_driver rather than being duplicated.
Dark-Alex-17
c84f9522e9