is_human | string | null | no | The only substrate filter. |
require_tags | array | null | no | Capability / modality facets (binary dimensions) that must resolve yes. |
quality_tier | string | null | no | Quality facet (matched on metadata.quality_tier). |
max_blended_cost | number | null | no | Budget facet — nano_per_token ceiling (reads blended cost). |
min_usable_context | number | null | no | Capacity facet — usable_context (tokens) floor. |
policy | array | null | no | Compliance properties (binary dimensions) that must resolve yes (NOT provider identity). |
min_confidence | number | null | no | Only count a facet if its confidence_eff ≥ this (0..1). |