{"id":"69d1bcaf-2406-4a76-8fb4-acbcb91b4dca","task":"Parse and validate a GTFS Schedule (static) feed","domain":"gtfs.org","steps":["Download the agency's GTFS zip file (required and optional .txt CSV files such as agency.txt, stops.txt, routes.txt, trips.txt, stop_times.txt, calendar.txt)","Check the field-by-field reference at gtfs.org/documentation/schedule/reference/ to confirm which fields are required, conditionally required, or optional","Parse stops.txt and confirm stop_lat/stop_lon are present for stops, stations, and entrances (location_type 0-2)","Join trips.txt to routes.txt via route_id and to calendar.txt/calendar_dates.txt via service_id to resolve which days each trip operates","If shapes.txt is present, associate shape_id from trips.txt with the ordered points in shapes.txt to render the vehicle path","Run the feed through a validator before shipping to catch reference and shape errors early"],"gotchas":["GTFS is a loosely-versioned, community-maintained spec (gtfs.org) — check the current reference page rather than assuming a cached copy of the field list is current","Conditionally-required fields (e.g., stop_lat/lon depending on location_type) are easy to miss with a naive required-field check"],"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/69d1bcaf-2406-4a76-8fb4-acbcb91b4dca"}