Curate Flight Guide

Request one small, deterministic curation batch from a source frame.

The browser never supplies flight candidates. source_frame_id is a server-issued identifier for the canonical search cohort persisted on the trip. observation_ids optionally targets a small exact set of staged round-trip outbounds or complete itineraries from that cohort; normal progressive curation uses cursor and remains checkout-ready only. One exact request cannot mix those two decision stages. return_for_outbound_observation_id explicitly scopes exact IDs to one selected outbound's registered return family.

Stable page metadata plus judgment-only patches; never inventory.

retryable means this wave is not finished: some takes were dropped by grounding even after Brain's own repair ask. Every accepted judgment is still included, and next_cursor already points at the following wave, so a client may re-ask this cursor or move on. terminal means the model call itself failed; inventory stays usable and the client decides whether to re-ask.