Module types 

Bidirectional streaming types

This module defines the core types for bidirectional communication in Plexus RPC. These types enable server-to-client requests during streaming execution, supporting interactive workflows like confirmations, prompts, and selection menus.

Type System

The bidirectional system uses a generic type design that separates:

1. Standard types (StandardRequest/StandardResponse) for common UI patterns
2. Custom types that activations can define for domain-specific interactions

Wire Format

All types use serde for serialization. The standard types use internally-tagged enums for JSON-friendly wire format:

// StandardRequest::Confirm
{ "type": "confirm", "message": "Delete file?", "default": false }

// StandardResponse::Confirmed
{ "type": "confirmed", "value": true }

Error Handling

BidirError covers all failure modes:

• Transport doesn’t support bidirectional (BidirError::NotSupported)
• User cancelled (BidirError::Cancelled)
• Request timed out (BidirError::Timeout)
• Type/serialization errors

Structs

SelectOption

An option in a StandardRequest::Select request.

Enums

BidirError

Error types for bidirectional communication

StandardRequest

Standard request types for common interactive UI patterns.

StandardResponse

Standard response types matching StandardRequest.