Interface AiKnowledgeBaseGraphConceptsConfig

Which metadata fields become value facets (flat sets of categorical values). 'auto' (the default) profiles the KB's context metadata and selects the categorical fields; an explicit list overrides auto-selection (fields still subject to the hard cardinality cap); [] disables value facets.

Explicit path facets — deterministic trees split from a hierarchical path field (e.g. a folder path) rather than LLM-grouped. Independent of facets: a path facet always builds when its field has values, coexists with auto value-facet selection (reserved outside the facet cap), and is exempt from the categorical eligibility gates (a path field is near-unique by leaf). Omitted/[] ⇒ no path facets.