/**
 * Layer 1 (structural) validation, backed by JSON Schema via ajv.
 *
 * The schema files in `./schema` are the portable artifact: any language can
 * validate a file natively against them. This module is the TypeScript core's
 * own use of those same schemas.
 */
/** Which structural schema to validate against. */
export type StructuralKind = 'table' | 'schema';
/** A single structural error, before file context is attached. */
export interface StructuralError {
    /** JSON pointer to the offending field (empty string for the root). */
    readonly field: string;
    /** Human-readable description. */
    readonly message: string;
}
/** Outcome of validating one file structurally. */
export interface StructuralResult {
    /** True when the file matches its structural schema. */
    readonly valid: boolean;
    /** Errors found (empty when valid). */
    readonly errors: StructuralError[];
}
/**
 * Validate parsed JSON against a structural schema.
 *
 * @param kind Which schema to use.
 * @param data Parsed JSON content.
 * @returns Whether it is valid plus any structural errors.
 */
export declare function validateStructure(kind: StructuralKind, data: unknown): StructuralResult;