Backend gRPC Patterns

Purpose

Design consistent, production-grade gRPC services. Every RPC must follow the same conventions for protobuf schemas, streaming patterns, interceptors, error handling, and service versioning.

Agent Protocol

Trigger

Exact user phrases: "gRPC", "protobuf", "protocol buffers", "streaming RPC", "unary call", "server streaming", "client streaming", "bidirectional streaming", "gRPC interceptor", "gRPC error handling", "protobuf schema", "service definition", "design an RPC", "gRPC contract".

Input Context

Before activating, verify:

• The service or feature being designed is known.
• The proto package name and version are known.
• The streaming model (unary/server-stream/client-stream/bidi) is chosen. If not, ask: "What streaming model do you need?"
• The language/runtime for code generation is known.

Output Artifact

No file output unless the user requests it. Produces protobuf schema and RPC specifications as text.