---
name: nestjs-transport-6077371f6f72
description: Configure gRPC, RabbitMQ, and monorepo contract patterns for NestJS microservices. Use when setting up gRPC service-to-service calls, RabbitMQ event-driven messaging, shared contract libraries, or microservice exception handling in NestJS.
metadata:
  triggers:
    files:
    - 'main.ts'
    - '**/*.controller.ts'
    - 'Transport.GRPC'
    - 'Transport.RMQ'
    keywords:
    - MicroserviceOptions
---
# Microservices & Transport Standards

## **Priority: P0 (CRITICAL)**


- **Synchronous (RPC)**: Use **gRPC** for low-latency, internal service-to-service calls (10x faster than REST/JSON).
- **Asynchronous (Events)**: Use **RabbitMQ** or **Kafka** for decoupling domains via fire-and-forget (`emit()`).

## gRPC Setup

See [implementation examples](references/example.md)

## RabbitMQ Setup

See [implementation examples](references/example.md)

## Monorepo Contracts

- Store all DTOs, `.proto` files, and Interfaces in `libs/contracts`.
- Services never import from sibling services — only from `contracts`.
- Semantic versioning of messages mandatory. Never change field type; add new field.

## Exception Handling

Standard `HttpException` lost over RPC/TCP. Use `RpcException` with global filters:

See [implementation examples](references/example.md)

## Serialization

- Apply `useGlobalPipes(new ValidationPipe({ transform: true }))` in `MicroserviceOptions` setup, not HTTP.

## Anti-Patterns

- **No cross-service imports**: Services must import only from `libs/contracts`, never from sibling services.
- **No HttpException in RPC**: Use `RpcException` with global `RpcExceptionFilter` for microservice errors.
- **No unversioned message schema**: Add new fields; never change existing field types — consumers will break.

---
Source attribution: HoangNguyen0403
Original project: https://github.com/HoangNguyen0403/agent-skills-standard
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Dave AI.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Dave AI resource metadata

Creator / publisher: HoangNguyen0403
Original project: https://github.com/HoangNguyen0403/agent-skills-standard
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Development & Engineering
Roles: Backend Developer, Data Engineer, DevOps / SRE
Specialties: Backend
Tools: Grpc, Rabbitmq
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: d1a1e260f9c11b77d3d848204300c987204b16cf1beb0a473151d4cb6e2f7ff8