Solo pollers park (3001 RETRY); two concurrent pollers pair and both
receive 3004 + same BattleId. Cache hits on the first arriver's next
poll. ?scripted=1 retains today's solo Scripted path for dev work.
Response DTO's BattleId/NodeServerUrl become nullable so 3001 omits
them on the wire (WhenWritingNull policy drops them).
ASP.NET's default bool binder rejects "1" as a value, so the scripted
opt-in is bound as string? and parsed permissively (accepts "1" and
"true"/"True"/etc.) rather than relying on built-in bool binding.
The decompiled client's DoMatchingBase.SettingCardMasterId calls
jsonData["card_master_id"].ToInt() with no Keys.Contains guard when
matching_state ∈ {3004, 3007, 3011}. Omitting the field crashes the
client with KeyNotFoundException at Cute.NetworkManager+Connect.
Add CardMasterId to DoMatchingResponseDto with a default value of 1
(matching the /load/index response and prod captures). Extend the
controller test to assert the field is present.
Caught during the v1 smoke walk-through; full client log line:
[Error: Unity Log] KeyNotFoundException: The given key was not
present in the dictionary.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
