Module types 

类型系统模块：定义基于 AI-Protocol 规范的核心数据类型。

Types Module

This module defines the core type system based on the AI-Protocol standard schema, providing strongly-typed representations for all AI interaction primitives.

Overview

The type system ensures:

• Type-safe message construction and handling
• Consistent event representation across providers
• Standardized tool/function calling interfaces
• Serialization compatibility with AI-Protocol specification

Key Types

Type	Description
Message	Chat message with role and content
MessageRole	Message role (user, assistant, system, tool)
StreamingEvent	Unified streaming event representation
ToolCall	Function/tool call from model response
ToolDefinition	Tool definition for model context

Submodules

Module	Description
events	Streaming event types and variants
message	Message types with multi-modal content support
tool	Tool/function calling types

Example

use ai_lib_core::types::{Message, MessageRole, ToolDefinition};

// Create messages
let system = Message::system("You are a helpful assistant");
let user = Message::user("What's the weather?");

// Define a tool
let tool = ToolDefinition {
    tool_type: "function".to_string(),
    function: ai_lib_core::types::tool::FunctionDefinition {
        name: "get_weather".to_string(),
        description: Some("Get current weather for a location".to_string()),
        parameters: Some(serde_json::json!({
            "type": "object",
            "properties": {
                "location": {"type": "string"}
            }
        })),
    },
};

Modules

events

Streaming events based on AI-Protocol standard_schema

execution_result

E/P 边界：执行层返回结果类型（对应 Paper1 第 3 章 3.1–3.2）。

message

Unified message format based on AI-Protocol standard_schema

tool

Tool calling definitions based on AI-Protocol standard_schema

Structs

ExecutionMetadata

Metadata returned with every E-layer call for P-layer policy decisions.

ExecutionResult

Successful execution envelope from E: payload plus metadata for P.

ExecutionUsage

Token usage attached to an execution (aligned with driver UsageInfo).

Message

Unified message structure

ToolCall

Tool call (invocation from model)

ToolDefinition

Tool definition (for function calling)

Enums

MessageRole

Message role

StreamingEvent

Unified streaming event enum