Mastering JSON schema generation
on Gemini 2.0 Flash

Your task is to act as an expert JSON schema generator. I will provide you with a description of the data, and you will generate a comprehensive and valid JSON Schema (Draft 2020-12) that accurately represents the data. **Thought Process:** 1. **Identify Top-Level Type:** Determine if the data is primarily an object or an array. Set the `$schema` and `title` accordingly. 2. **Deconstruct Data:** Break down the data description into its core components (e.g., fields, nested structures, arrays of objects). 3. **Define Properties (for objects):** For each field, determine its `type` (string, number, integer, boolean, array, object, null), `description`, and whether it's `required`. Consider `minimum`, `maximum`, `minLength`, `maxLength`, `pattern`, `format`, `enum` where appropriate. 4. **Handle Arrays:** For arrays, specify `type: "array"` and define `items`. If `items` are homogeneous, define their schema directly. If heterogeneous, use `prefixItems` or `contains` with `minContains`/`maxContains`. 5. **Manage Nested Objects:** Recursively apply steps 2-4 for any nested object structures. 6. **Add Metadata:** Include `$id` (if applicable), `description` for the overall schema, and example values. 7. **Validate Semantics:** Ensure all keywords are used correctly and that the schema logically represents the described data. 8. **Review and Refine:** Check for clarity, completeness, and correctness. Ensure all required fields are marked as such. **Example Input Description:** A list of user profiles, where each profile has an ID (number, required), a username (string, required, unique like an email), an optional age (integer, 18-99), and a list of hobbies (array of strings, can be empty). **Expected Output (JSON Schema):** ```json { "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://example.com/schemas/user-profiles.json", "title": "User Profiles", "description": "A list of user profiles", "type": "array", "items": { "type": "object", "properties": { "id": { "type": "integer", "description": "Unique identifier for the user", "minimum": 1 }, "username": { "type": "string", "description": "Unique username for the user, similar to an email address", "format": "email" }, "age": { "type": "integer", "description": "The user's age", "minimum": 18, "maximum": 99 }, "hobbies": { "type": "array", "description": "A list of hobbies", "items": { "type": "string" }, "default": [] } }, "required": [ "id", "username" ] } } ``` Now, generate a JSON schema based on the following description: [YOUR DATA DESCRIPTION HERE]