co-mono/packages/coding-agent/examples/custom-tools/hello.ts

import { Type } from "@sinclair/typebox";
import type { CustomToolFactory } from "@mariozechner/pi-coding-agent";

const factory: CustomToolFactory = (pi) => ({
  name: "hello",
  label: "Hello",
  description: "A simple greeting tool",
  parameters: Type.Object({
    name: Type.String({ description: "Name to greet" }),
  }),

  async execute(toolCallId, params) {
    return {
      content: [{ type: "text", text: `Hello, ${params.name}!` }],
      details: { greeted: params.name },
    };
  },
});

export default factory;