/**
 * gRPC Proto + Server Generator (T18)
 *
 * Reads DMMF and generates a full gRPC service layer:
 *   api/grpc/
 *   ├── databridge.proto      — proto3 definitions (messages + services for all models)
 *   ├── server.ts             — gRPC server using @grpc/grpc-js
 *   ├── client.ts             — typed client stub helper
 *   └── handlers/
 *       ├── <model>.ts        — per-model RPC handler (list/get/create/update/delete)
 *       └── index.ts          — barrel export
 *
 * Activation:
 *   databridge generate --grpc
 *
 * Runtime deps the user needs to install:
 *   pnpm add @grpc/grpc-js @grpc/proto-loader
 *
 * TEACHING NOTE: We write a combined .proto file (all models in one file) because
 * DataBridge's generated API is self-contained. Each model gets its own message
 * type plus CRUD RPC methods in a dedicated service. The Fastify Prisma plugin
 * is re-used by attaching prisma to the gRPC server via a module-level singleton.
 */
import type { DmmfDocument } from '../types/dmmf.js';
export declare class GRPCGenerator {
    private outputDir;
    constructor(outputDir: string);
    generate(dmmf: DmmfDocument): Promise<void>;
    private writeProtoFile;
    /** Build message types for a single model */
    private buildModelMessages;
    /** Build the service definition for a model */
    private buildServiceDefinition;
    private writeGrpcServer;
    private writeClientHelper;
    private writeHandler;
    private writeHandlersIndex;
}
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