Validate a captured JSON response against a JSON Schema and identify missing fields, type mismatches, unsupported values, and common format errors.
Supported rules include local $ref, type, object properties, required fields, arrays, enums, const, formats, lengths, patterns, ranges, and common composition rules.
This is a browser-side contract helper for fixtures and captured responses. Review advanced JSON Schema vocabulary, remote references, and production integration behavior in your own API test suite.