[{"slug":"ZV-2026-0406","server_name":"flights.flightpowers.com","severity":"breaking","title":"flights.flightpowers.com: Type of use_fallback on search_oneway_flights changed boolean → unset.","summary":"[breaking] Type of use_fallback on search_oneway_flights changed boolean → unset. [risky] Default of use_fallback on search_oneway_flights changed false → null. [breaking] Type of use_fallback on search_roundtrip_flights changed boolean → unset. [risky] Default of use_fallback on search_roundtrip_flights changed false → null.","changes":[{"kind":"input_type_changed","path":"inputSchema.properties.use_fallback","tool":"search_oneway_flights","after":"unset","before":"boolean","detail":"Type of `use_fallback` on `search_oneway_flights` changed boolean → unset.","severity":"breaking"},{"kind":"default_changed","path":"inputSchema.properties.use_fallback","tool":"search_oneway_flights","after":null,"before":false,"detail":"Default of `use_fallback` on `search_oneway_flights` changed false → null.","severity":"risky"},{"kind":"input_type_changed","path":"inputSchema.properties.use_fallback","tool":"search_roundtrip_flights","after":"unset","before":"boolean","detail":"Type of `use_fallback` on `search_roundtrip_flights` changed boolean → unset.","severity":"breaking"},{"kind":"default_changed","path":"inputSchema.properties.use_fallback","tool":"search_roundtrip_flights","after":null,"before":false,"detail":"Default of `use_fallback` on `search_roundtrip_flights` changed false → null.","severity":"risky"}],"published_at":"2026-08-26T06:53:13.526Z"}]