/**
 * MCP Client Store
 *
 * Persists Dynamic Client Registration (RFC 7591) records in the Harper
 * `harper_oauth_mcp_clients` table. Clients survive Harper restarts so MCP
 * clients (Claude Desktop, Cursor, mcp-remote) that cache their issued
 * client_id continue to authenticate after a deploy.
 *
 * Array-valued fields (redirect_uris, contacts, grant_types, response_types)
 * are JSON-encoded on write and decoded on read, matching the
 * csrf_tokens.data pattern already used in this plugin.
 */
import type { Logger, MCPClientRecord } from '../../types.ts';
/**
 * Reset the cached table reference (for testing only)
 * @internal
 */
export declare function resetMCPClientsTableCache(): void;
export declare class MCPClientStore {
    private logger?;
    constructor(logger?: Logger);
    /**
     * Persist a client registration. Overwrites any existing record with the
     * same client_id (RFC 7591 registration is idempotent at the storage layer;
     * the registration endpoint allocates a fresh client_id per request).
     */
    set(record: MCPClientRecord): Promise<void>;
    /**
     * Look up a client by client_id. Returns null if not found or on read error
     * (errors logged; we don't surface storage failures to OAuth clients).
     */
    get(clientId: string): Promise<MCPClientRecord | null>;
    /**
     * Remove a client registration.
     */
    delete(clientId: string): Promise<void>;
}