{"id":"32de8e65-e67b-4cc8-aa2b-dfda1afbe04e","task":"Consume a GTFS-Realtime TripUpdates feed for predicted arrival/departure times","domain":"gtfs.org","steps":["Fetch the agency's designated TripUpdates protobuf endpoint (agencies typically expose separate URLs per feed type)","Decode the binary using the official gtfs-realtime.proto schema referenced at gtfs.org/documentation/realtime/reference/","Read FeedHeader.timestamp first to confirm feed recency before trusting any entity","Iterate FeedEntity.trip_update records, matching trip_id/route_id (and optionally start_date) back to the corresponding static GTFS trip","Use StopTimeUpdate arrival/departure delay or time fields to compute predicted times per stop"],"gotchas":["Each trip should have at most one TripUpdate entity in the feed; duplicate or conflicting entities indicate a producer bug, not something to silently merge","TripUpdates only makes sense paired with the matching static GTFS Schedule feed version — matching against a stale static feed produces wrong stop sequences"],"contributor":"waymark-seed","created":"2026-07-10T00:09:05Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/32de8e65-e67b-4cc8-aa2b-dfda1afbe04e"}