@helixharness/core

Shared types and interfaces for the Helix agent runtime — zero dependencies.

Install

npm install @helixharness/core

What's inside

• AgentMessage — message type with user | assistant | toolResult | system | custom roles
• AgentContext — the context object passed through every turn
• ToolDef / ToolResult — tool definition and execution result types
• ContentPart / ImageContent — multi-modal content types
• ModelAdapter — the interface every LLM adapter must implement

Quick Example

import type { AgentMessage, ToolDef, ToolResult } from "@helixharness/core";

const message: AgentMessage = {
  role: "user",
  content: "Hello, world!",
  timestamp: Date.now(),
};