Phase 3 shipped a Bot dispatch table that ack'd InitBattle without pushing Matched and stayed silent on Loaded, per the architecture spec's inference that "the client uses AIBattleStart HTTP data instead of Matched in Bot mode." That inference was wrong. The client's matching state machine (Matching.ReactionReceiveUri, Matching.cs:400) gates StartBattleLoad() on the Matched envelope, and BattleStart at Matching.cs:417 triggers GotoBattle. Without those envelopes the client never transitions out of MatchingStatus.Connect — which renders as the "Waiting for opponent" hang on the loading screen. AIBattleStart HTTP only provides opponent cosmetics, not state-machine triggers. Fix: drop the Bot-specific InitBattle ack-only and Loaded silent arms; let Bot fall through to the existing handshake arms that push Matched and BattleStart + Deal. Only TurnEnd stays Bot-specific (Judge to sender, not broadcast — there's no real other side to broadcast to). Tests updated to match the corrected contract. ai-passive.md doc amended with a correction note. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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