{"$schema":"https://json-schema.org/draft/2020-12/schema","title":"Error","description":"API error response shape (4xx/5xx). Code matches GET /api/errors catalog.","type":"object","required":["error"],"properties":{"error":{"type":"string","description":"Short error label"},"code":{"type":"string","description":"Machine-readable code (e.g. NotFound)"},"message":{"type":"string","description":"Human-readable detail"}},"additionalProperties":true}