CLI

Validate an already-produced JSON file against a raw JSON Schema file, without writing any code:

npx shapecraft validate --schema schema.json --output output.json

schema.json is a raw JSON Schema (the same shape as the { jsonSchema } SchemaInput), output.json is the data to check against it. Runs the same checkJsonSchema structural check generate() uses internally - required fields must be present and non-empty, type/enum must match, nested properties/items are checked recursively. Exits 0 and prints ✓ ... matches ... on success; exits 1 and prints the specific violation (e.g. Missing required property: "age") on failure. Useful in CI to check a fixture or a recorded model output against a schema without spinning up a full generate() call.