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promptfleet Agents

agent_core

Agent Core

Section titled “Agent Core”

Protocol-agnostic agent domain types.

This crate defines the universal vocabulary for agent interactions — messages, content parts, task phases, and conversation context — without any dependency on A2A, MCP, or any specific wire protocol.

Design Principles

Section titled “Design Principles”
  • Zero protocol dependencies: only serde + serde_json
  • Minimal surface: just the types every consumer needs
  • Conversion-friendly: types designed for cheap From/Into mapping
  • WASM-compatible: no I/O, no async, no platform-specific code

Usage

Section titled “Usage”

Consumers that only need to describe agent interactions (studio, coordination, tests) depend on agent_core alone. The agent_sdk crate provides bidirectional conversions between these types and protocol-specific types (A2A, MCP, etc.).

use agent_core::{AgentMessage, Role, ContentPart};


// Simple text message — no protocol ceremony
let msg = AgentMessage::user_text("What's the weather?");


// Structured content
let msg = AgentMessage::new(Role::User, vec![
    ContentPart::Text("Analyze this data".into()),
    ContentPart::Data(serde_json::json!({"rows": 42})),
]);