TSON – A JSON superset with immutable, hash-pinned schemas

TSON (Typed Schema Object Notation) is a new schema system featuring immutable, hash-pinned schemas where both data and schema definitions are verified through a single hash chain. It provides a JSON superset data format designed for readability and includes a working implementation (tson-java) with command-line tools for schema validation that report all errors at once with detailed paths and reasons. The schema system uses a compact grammar supporting required/optional fields, default values, arrays, tuples, sets, and enums, all built on a foundation of formal research into JSON schema design.