Validate JSON Schema (Meta-Validation)

Validate that a JSON Schema document is itself a valid schema according to the JSON Schema specification.

Usage

npx tsx scripts/meta-validate.ts <schema-file> [options]

Arguments

Argument	Required	Description
schema-file	Yes	Path to the JSON Schema file to validate

Options

Option	Description
--draft=VERSION	JSON Schema draft version (draft-04, draft-06, draft-07, 2019-09, 2020-12). Default: auto-detect
--strict	Enable strict mode (additional validation rules)
--verbose	Show detailed validation information

Output

Valid schema:

Valid JSON Schema (draft-2020-12)
  Keywords: 5
  Definitions: 2

Invalid schema:

Invalid JSON Schema
  Error: "type" must be a string or array
  Path: /properties/name/type

Script Execution

npx tsx scripts/meta-validate.ts schema.json
npx tsx scripts/meta-validate.ts schema.json --draft=draft-07
npx tsx scripts/meta-validate.ts schema.json --strict --verbose

Run from the json-schema plugin directory: ~/.claude/plugins/cache/json-schema/

Draft Version Detection

The script auto-detects the JSON Schema draft version from:

1. The $schema keyword in the document
2. Falls back to draft-2020-12 if not specified

Supported drafts:

• draft-04 - JSON Schema Draft 4
• draft-06 - JSON Schema Draft 6
• draft-07 - JSON Schema Draft 7
• 2019-09 - JSON Schema Draft 2019-09
• 2020-12 - JSON Schema Draft 2020-12 (default)

Strict Mode

When --strict is enabled, additional validations are performed:

• Disallow unknown keywords
• Require $schema declaration
• Validate format assertions by default

Related Skills

• Use schema-validate to validate JSON data against a schema
• Use schema-check to validate a JSON file against its embedded $schema