import type { MCPClient } from '../core/database.js';
import type { ContextContract } from '../types/context.js';
import type { ID, ValidationResult } from '../types/common.js';
export declare class ContextContractService {
    /** In-memory registry — default contracts are always available without DB access. */
    private readonly registry;
    constructor(_client: MCPClient);
    /** Register a custom contract. Overwrites any existing contract with the same id. */
    register(contract: ContextContract): ValidationResult;
    getById(id: ID): ContextContract | null;
    listAll(): ContextContract[];
    validate(contract: Partial<ContextContract>): ValidationResult;
}
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