fn build_throwaway_meta(
source_meta: &HashMap<String, Value>,
provider: BtwProvider,
gemini_policy: &str,
) -> HashMap<String, Value>Expand description
Build the throwaway block’s meta from the source block’s — its one-shot
CLI config with provider’s tool-less /btw argv, minus every
agent-identity-shaped key. gemini_policy is the deny-all policy path
(read only for Gemini). Pure and unit-testable; see the module doc
comment for the exclusion rationale.