Scripted-bot softlock root cause: client-stocked SELECT_SKILL_URI /
SLIDE_OBJECT_URI hand emits (e.g. target selection on unit play / leader
attack) arrive as SIO BinaryEvent("hand", ...) with an ack-id. Our
DispatchSocketIo only had cases for "msg" and "alive" — "hand" fell to
the default Debug-drop with no SIO ack going back. Client's
stockEmitMessageMgr (RealTimeNetworkAgent.cs:1463) blocks subsequent
emits until the previous one is acked, so all follow-up PlayActions /
TurnEndActions / TurnEnd frames were stocked but never transmitted. The
loader hooks at EmitMsg (intent) not the socket layer, which is why
battle-traffic.ndjson shows the frames as sent while the server never
received them. ~10s later the client gives up and aborts the WS.
Wire-shape proof from data_dumps/captures/logs/websocket_output.txt:
line 619: [sio-in] uri=TurnStart pubSeq=17 ackId=16 ... (T3 start)
line 689: [ws-rx-text] preview=451-26["hand", {...}] ← unhandled
line 691: [ws-rx-bin] binLen=58 pendingFrame=hand
(no further [sio-in] entries — server received nothing else)
line 709: [ws-recv-exit] reason=OperationCanceled wsState=Aborted
New HandleHandEventAsync (RealParticipant.cs):
- Fire-and-forget hand frames (no ack-id; TOUCH_URI / SELECT_OBJECT_URI /
TURN_END_READY_URI) are silently swallowed — no queue-blocking risk
- Stocked hand frames decode the binary attachment via the same
msgpack-string + NodeCrypto.Decrypt pipeline as HandleMsgEventAsync,
parse the JSON, extract top-level "pubSeq", and SendSioAckAsync with
that pubSeq as the ack arg (matches what stockEmitMessageMgr.GetSelectData
expects to look up)
- Body shape is {"StockHandData":[uri_int, viewerId, udid, ...params,
pubSeq], "try":0, "pubSeq":N} — NOT a MsgEnvelope (no top-level "uri"),
so we can't reuse HandleMsgEventAsync as-is
- Missing-pubSeq fallback acks with arg=0 (rare path, logged at Warning)
so we never softlock from a malformed body
WireConstants gets the HandEvent = "hand" constant for the dispatch case.
In scripted/Bot mode the ack-only handler is correct (no opponent to
forward touches to). PvP-side forwarding semantics are unverified — see
docs/audits/battle-node-sio-events-2026-06-02.md (outer repo) for the
full event inventory and remaining gaps.
Tests:
- RealParticipantHandEventTests covers the three paths: stocked-with-ack,
fire-and-forget (no ack expected), missing-pubSeq fallback (arg=0). Each
drives a real hand frame through RunAsync via TestWebSocket and asserts
the SIO ack frame shape (43<ackId>[<arg>]) in outbound sends.
- 175 battle-node tests passing (was 172; +3 new). Full suite green.
Diagnostic logs ([sio-in] / [sio-out] / [ws-rx-text] / [ws-rx-bin] /
[ws-recv-exit] / [ws-loop-exit]) are left in place for one verification
cycle. After a live re-run confirms the fix, they should be stripped per
the audit doc's recommended-order step 2.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
RealParticipant gains _sessionFinished TCS + MarkSessionFinished /
AwaitSessionFinishedAsync. PvP first-arriver's handler awaits the
signal instead of calling self.RunAsync (which the session does
internally on the same instance — double-call would race the WS read).
BattleSession.RunAsync branches on Type: Pvp uses WhenAny + synthesize
BattleFinish(Win) to survivor + WhenAll(drain); Scripted/Bot keep
Phase 1's WhenAll-everything semantics. Disconnect cascade now drives
end-of-battle when a WS drops without a graceful Retire.
Internal setter; defaults to AwaitingInitNetwork. PvP needs A and B to
progress through the handshake states independently, which the
session-level BattleSession.Phase can't model. Session migration to read
realFrom.Phase is the next task.
Old single-WS BattleSession + its dispatch/pump/ClipAckArg tests are
obsolete after the Task 9 handler cutover. ClipAckArg overflow + boundary
coverage moved into RealParticipantTests. BattleSessionV2 renamed back
to BattleSession; the V2 suffix was a placeholder during the parallel
-build refactor.
Lifts the WS read loop, SIO encode/decode, per-WS OutboundSequencer +
InboundTracker, and SIO ack out of BattleSession into a participant.
PushAsync(noStock=false) assigns playSeq via the sequencer; noStock=true
bypasses it. FrameEmitted fires on each deduplicated inbound envelope.
The existing BattleSession keeps its own copy of the WS code for now;
Task 9 cuts the handler over to use BattleSessionV2 + RealParticipant
and Task 10 deletes the old BattleSession + duplicate code.
PushAsync(TurnEnd|TurnEndFinal) fires FrameEmitted three times:
OpponentTurnStart + OpponentTurnEnd + OpponentJudge. Behaviour-identical
to the v1.2 case arm in BattleSession.ComputeResponses; just repackaged
as a participant. Other URIs are swallowed. Used by Phase 1 to preserve
v1.2 behaviour under the new abstraction; replaces the case-arm logic
in BattleSession in Task 7.
Silent participant for the Phase 3 Bot type. PushAsync swallows;
FrameEmitted never fires; RunAsync completes immediately. ViewerId is
the existing FakeOpponentViewerId const for consistency with scripted
lifecycle builders. Three tests lock the no-op contract.
