/**
 * Cell Metadata Schema
 *
 * Defines which cell fields agents can modify and their types.
 * Must match lib/cellMetadata.ts on the frontend.
 *
 * Shared between:
 * - UI handler (useOperationHandler.ts)
 * - Headless handler (headless-handler.ts)
 * - Operation router validation
 */
export interface MetadataFieldSchema {
    type: 'string' | 'number' | 'boolean' | 'enum';
    values?: string[];
    agentMutable: boolean;
    default?: unknown;
    description?: string;
}
export declare const CELL_METADATA_SCHEMA: Record<string, MetadataFieldSchema>;
export interface ValidationResult {
    valid: boolean;
    error?: string;
}
/**
 * Validate a metadata value against the schema.
 */
export declare function validateMetadataValue(key: string, value: unknown): ValidationResult;