TypeError: _missingExportShim is not a function at ZodSchema.getJsonSchema

[7flash]

Following code taken from example and adopted to Deno https://github.com/lgrammel/modelfusion/blob/main/examples/middle-school-math-agent/src/MiddleSchoolMathOpenAITools.ts

const apiKey = Deno.env.get('OPENAI_API_KEY')

const input = { text: 'solve this' }

MathAgent();

async function MathAgent() {
  const { text: problem } = input;

  const { OpenAIApiConfiguration, OpenAIChatMessage, openai, useToolsOrGenerateText, Tool, ZodSchema } = await import("https://dev.jspm.io/modelfusion");
  const { z } = await import("https://dev.jspm.io/zod");

  const calculator = new Tool({
    name: "calculator",
    description: "Execute a calculation",

    parameters: new ZodSchema(
      z.object({
        a: z.number().describe("The first number."),
        b: z.number().describe("The second number."),
        operator: z.enum(["+", "-", "*", "/"]).describe("The operator."),
      })
    ),

    execute: async ({ a, b, operator }) => {
      switch (operator) {
        case "+":
          return a + b;
        case "-":
          return a - b;
        case "*":
          return a * b;
        case "/":
          return a / b;
        default:
          throw new Error(`Unknown operator: ${operator}`);
      }
    },
  });

  const messages = [
    OpenAIChatMessage.system(
      "You are solving math problems. " +
      "Reason step by step. " +
      "Use the calculator when necessary. " +
      "The calculator can only do simple additions, subtractions, multiplications, and divisions. " +
      "When you give the final answer, provide an explanation for how you got it."
    ),
    OpenAIChatMessage.user(problem),
  ];

  console.log(`PROBLEM: ${problem}\n`);

  const { text, toolResults } = await useToolsOrGenerateText(
    openai.ChatTextGenerator({
      api: new OpenAIApiConfiguration({ apiKey }),
      model: "gpt-4-1106-preview",
      temperature: 0,
      maxCompletionTokens: 500,
    }),
    [calculator],
    messages
  );

}

And probably the error is triggered when running around here https://github.com/lgrammel/modelfusion/blob/61562b19863b8ad7c990a0af920a93dc94594941/src/tool/generate-tool-calls-or-text/generateToolCallsOrText.ts#L139C45-L139C53

OPENAI_API_KEY=$(cat .openai-key) deno run --allow-all nov25-third.ts
PROBLEM: solve this

error: Uncaught (in promise) TypeError: _missingExportShim is not a function
        return _missingExportShim(this.zodSchema);
               ^
    at ZodSchema.getJsonSchema (https://dev.jspm.io/npm:modelfusion@0.80.0/_/EQpO4pnp.js:79:16)
    at https://dev.jspm.io/npm:modelfusion@0.80.0:7555:49
    at Array.map (<anonymous>)
    at OpenAIChatModel.doGenerateToolCallsOrText (https://dev.jspm.io/npm:modelfusion@0.80.0:7550:26)

[lgrammel]

This is not a Zod error, it's related to ModelFusion.