/**
 * Field classification sets for JSON Schema sanitization across providers.
 *
 * Each set serves a different provider need. They overlap intentionally —
 * co-locating them makes the overlap visible and maintainable.
 *
 * All keysets here are static and small (≤ ~40 entries) so they live as
 * `Record<string, true>` literals — `k in REC` resolves through hidden
 * class inline caches without the per-call hashtable cost of `Set.has`.
 */
/**
 * Google Generative AI unsupported schema fields.
 * Stripped during normalizeSchemaForGoogle / normalizeSchemaForCCA.
 */
export declare const UNSUPPORTED_SCHEMA_FIELDS: Record<string, true>;
/**
 * Human-meaningful validation/decorative keywords that can be preserved in a
 * sibling description when a provider-specific normalizer strips them from the
 * wire schema.
 */
export declare const LIFTABLE_TO_DESCRIPTION_FIELDS: Record<string, true>;
/**
 * Non-structural schema keys stripped during OpenAI strict mode sanitization.
 * These are decorative/validation-only keywords that don't affect the structural
 * shape OpenAI's strict mode enforces.
 */
export declare const NON_STRUCTURAL_SCHEMA_KEYS: Record<string, true>;
/**
 * Cloud Code Assist type-specific allowed keys per JSON Schema type.
 * Used when collapsing mixed-type combiner variants for CCA Claude.
 */
export declare const CLOUD_CODE_ASSIST_TYPE_SPECIFIC_KEYS: Record<string, Record<string, true>>;
/**
 * Flat set of every type-specific key across all CCA types.
 * Used to identify sibling keys that need filtering during mixed-type collapse.
 */
export declare const ALL_CCA_TYPE_SPECIFIC_KEYS: Record<string, true>;
/**
 * Cloud Code Assist shared schema keys allowed on any type.
 * Used alongside CLOUD_CODE_ASSIST_TYPE_SPECIFIC_KEYS for CCA combiner collapsing.
 */
export declare const CLOUD_CODE_ASSIST_SHARED_SCHEMA_KEYS: Record<string, true>;
/**
 * Combinator keys used across schema sanitization modules.
 * Defined once to avoid duplication in strict-mode.ts and normalize.ts.
 */
export declare const COMBINATOR_KEYS: readonly ["anyOf", "allOf", "oneOf"];
/**
 * Cloud Code Assist Claude unsupported schema fields.
 * Much smaller than UNSUPPORTED_SCHEMA_FIELDS (Google) because CCA supports
 * validation keywords like additionalProperties, minLength, pattern, etc.
 * Meta/reference keywords plus object-key validators that CCA cannot resolve are stripped.
 */
export declare const CCA_UNSUPPORTED_SCHEMA_FIELDS: Record<string, true>;