Function ask_with_schema_and_provider 

pub fn ask_with_schema_and_provider<P: Provider>(
    schema_dump: &str,
    question: &str,
    config: &AskConfig,
    provider: &P,
) -> Result<AskResponse, AskError>

Lower-level entry point — same flow as ask_with_schema, but you supply the provider directly.

Used by the test suite (which passes a MockProvider) and by advanced callers who want to drive a custom backend (an internal LLM gateway, a recorded-replay test harness, a non-Anthropic provider not yet wired into ProviderKind, etc.). This is the canonical inner function — every other entry point in this module reduces to this one.