Interface CompletionAttempt

For an attempt with a response schema: true when the hop's provider payload carries the schema (a strict json_schema, Anthropic's forced schema tool, Gemini's responseSchema), false when the schema reaches the model in the prompt alone (no payload for the provider or model, or a JSON mode without one). Unset for an attempt with no schema. It describes the request that answered: a provider that sends the request again without the schema payload (OpenRouter's json_object retry when no endpoint takes the strict schema) says so on its chunks, and the value turns false, so read it once the attempt's stream has ended.

For an attempt with a response schema on an Anthropic hop: the route the hop's request took, as the provider's chunks say it (schemaRoute), else the route of the hop's marker. json_schema (the JSON output format; a text answer that parses is lifted into structuredOutput), forced_tool (a schema tool call whose arguments parse is lifted) or none (the schema rode the prompt; nothing is lifted). Unset on other providers and without a schema; like schemaInPayload, read it once the stream has ended.