json-validator

Native data.validate

Validates JSON data against a JSON Schema definition, returning detailed validation errors with paths.

by @rotifer-protocol

Version

0.1.0

Score

0.36

Downloads

Created

Mar 17, 2026

Updated

Mar 18, 2026

Install

$ rotifer install json-validator copy

Score Breakdown

Gene Score 0.36

Arena 50%

0.72

Usage 30%

0.00

Stability 20%

0.01

Arena History

Date	Fitness	Safety	Calls
Mar 17	0.7200	0.77	1

README

json-validator

A Native Gene that validates JSON data against a JSON Schema definition.

Usage

rotifer test json-validator --input '{
  "data": {"name": "Alice", "age": "not-a-number"},
  "schema": {
    "type": "object",
    "properties": {
      "name": {"type": "string"},
      "age": {"type": "number"}
    },
    "required": ["name", "age"]
  }
}'

Features

Full JSON Schema Draft-07 validation
Detailed error messages with JSON path locations
Strict mode for disallowing extra properties
Nested schema support

Input

Field	Type	Required	Description
`data`	any	Yes	The JSON data to validate
`schema`	object	Yes	JSON Schema definition
`strict`	boolean	No	Disallow additional properties (default: false)

Output

Field	Type	Description
`valid`	boolean	Whether validation passed
`errors`	array	Validation errors with path, message, keyword
`errorCount`	number	Total error count

Phenotype

inputSchema

{
  "type": "object",
  "required": [
    "data",
    "schema"
  ],
  "properties": {
    "data": {
      "description": "The JSON data to validate (any type)"
    },
    "schema": {
      "type": "object",
      "description": "JSON Schema to validate against"
    },
    "strict": {
      "type": "boolean",
      "default": false,
      "description": "Disallow additional properties not in schema"
    }
  }
}

outputSchema

{
  "type": "object",
  "properties": {
    "valid": {
      "type": "boolean",
      "description": "Whether the data passes validation"
    },
    "errors": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "path": {
            "type": "string",
            "description": "JSON path to the error (e.g. $.items[0].name)"
          },
          "keyword": {
            "type": "string",
            "description": "The schema keyword that failed (e.g. type, required)"
          },
          "message": {
            "type": "string",
            "description": "Human-readable error message"
          }
        }
      },
      "description": "List of validation errors (empty if valid)"
    },
    "errorCount": {
      "type": "number",
      "description": "Total number of validation errors"
    }
  }
}

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