DatasetsManager.create()

Added in: @mastra/core@1.4.0

Creates a new dataset. Zod schemas passed as inputSchema or groundTruthSchema are automatically converted to JSON Schema.

Usage example

import { Mastra } from "@mastra/core";
import { z } from "zod";

const mastra = new Mastra({ /* storage config */ });

// Create with metadata
const dataset = await mastra.datasets.create({
  name: "QA evaluation set",
  description: "Question-answer pairs for testing",
  metadata: { team: "ml" },
});

// Create with Zod schemas
const typedDataset = await mastra.datasets.create({
  name: "Typed QA set",
  inputSchema: z.object({
    question: z.string(),
    context: z.string().optional(),
  }),
  groundTruthSchema: z.object({
    answer: z.string(),
  }),
});

Parameters

name:

string

Display name for the dataset.

description?:

string

Description of the dataset.

inputSchema?:

unknown

JSON Schema or Zod schema for item inputs. Zod schemas are auto-converted.

groundTruthSchema?:

unknown

JSON Schema or Zod schema for item ground truths. Zod schemas are auto-converted.

metadata?:

Record<string, unknown>

Arbitrary metadata.

Returns

result:

Promise<Dataset>

A Dataset instance for the newly created dataset.