Struct Response 

pub struct Response {
    pub text: String,
    pub usage: Usage,
}

What every provider returns. We keep this minimal — text is the raw string the model produced (the caller parses it), usage surfaces token counts so callers can verify cache hits.

Fields

text: String

The raw text content of the assistant’s reply. Caller is responsible for JSON-parsing it (per the prompt template, this will be {"sql": "...", "explanation": "..."} on success).

usage: Usage