Protocol Buffers and gRPC Designer Skill

Overview

This skill specializes in designing Protocol Buffers schemas and gRPC service definitions with a focus on backward compatibility, performance, and cross-language interoperability.

Capabilities

• •Design .proto files following Google's style guide and best practices
• •Implement gRPC service definitions with streaming support
• •Validate wire format backward compatibility
• •Generate language-specific stubs for multiple targets
• •Configure proto linting and breaking change detection
• •Design efficient message structures for performance
• •Implement gRPC interceptors and middleware patterns

Target Processes

• •API Design Specification
• •Backward Compatibility Management
• •Multi-Language SDK Strategy

Integration Points

• •buf (schema registry, linting, breaking change detection)
• •protoc (Protocol Buffer compiler)
• •grpcurl (gRPC testing)
• •gRPC-Gateway (REST transcoding)
• •Connect (modern gRPC alternative)

Input Requirements

• •Service domain requirements
• •Message structure definitions
• •Streaming requirements (unary, server, client, bidirectional)
• •Target languages for code generation
• •Backward compatibility policy

Output Artifacts

• •.proto schema files
• •buf.yaml configuration
• •Generated language stubs
• •Breaking change analysis report
• •API documentation from proto comments

Usage Example

skill:
  name: protobuf-grpc-designer
  context:
    protoDirectory: ./proto
    targetLanguages:
      - go
      - python
      - typescript
    enableBufLint: true
    checkBreakingChanges: true
    streamingRequired: true

Best Practices

1. •Use package names that reflect domain boundaries
2. •Reserve field numbers when removing fields
3. •Use well-known types (Timestamp, Duration, etc.)
4. •Document all messages and fields with comments
5. •Version services through package names
6. •Implement proper error handling with Status codes