{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/Error", "title": "Error", "type": "object", "description": "API error response", "properties": { "code": { "type": "integer", "description": "Error code", "example": 400 }, "message": { "type": "string", "description": "Human-readable error message", "example": "Invalid request parameters" }, "details": { "type": "array", "items": { "type": "string" } } } }