JSON Schema Validator

Validates draft-07 schemas (with draft 2020-12 aliases like $defs and prefixItems): type, properties, required, items, enum, const, allOf/anyOf/oneOf/not, if/then/else, local $ref, numeric and string constraints, uniqueItems, patternProperties, dependentRequired, and best-effort format checks (toggle above).

Unsupported keywords such as unevaluatedProperties, $dynamicRef, and remote $ref are reported loudly instead of being silently skipped - a schema using them is never given a false pass.