stable stopping point with initial webrtc attempts

agent-tasks/client-simulator/async-bridge-spike/progress.md

@@ -232,3 +232,8 @@ Determine whether frontend code can support `await context.jamClient.method()` f
 - `session_utils.js` join-source trace now writes to buffer (`join-source.session-utils.joinSession`) while downgrading console severity.
 - Added a hard gate in `SessionStoreModern.es6` so the modern Reflux store only installs when `window.__JK_SKIP_LEGACY_SESSION_STORE__` is true.
 - In legacy bundle loads, modern store now emits `join-source.session-store.modern-skipped` and does not register listeners; this prevents hidden second `onJoinSession` listeners from racing the legacy store.
+- Added targeted leave-source instrumentation to diagnose immediate post-join session departure:
+- `SessionActions.leaveSession` now emits `leave-source.session-action` (call + trigger wrappers, with stack) in `react-components/actions/SessionActions.js.coffee`.
+- `SessionStore.js.coffee#onLeaveSession` now emits `leave-source.session-store.legacy-onLeaveSession`.
+- `SessionStoreModern.es6#onLeaveSession` now emits `leave-source.session-store.modern-onLeaveSession`.
+- This is intended to identify the exact caller path behind immediate `DELETE /api/participants/:client_id` after successful join.

agent-tasks/client-simulator/progress.md

@@ -7,7 +7,7 @@ Build a web-client-backed `jamClient` compatibility path plus a simulator/test h
 - [x] Create task tracking and record the initial plan
 - [ ] Complete async bridge contract spike (`await context.jamClient.method()` viability and blast radius)
 - [ ] Complete async bridge contract spike (`await context.jamClient.method()` viability and blast radius) (dual-bundle parser split + `SessionStore` legacy/modern split in progress)
-- [ ] Map protocol surface (jamClient methods, backend callbacks, REST APIs, websocket messages, shared-object usage)
+- [x] Map protocol surface for join/mute/volume flows using native 2-party recordings
 - [ ] Add instrumentation/tape-recording hooks (frontend/backend)
 - [ ] Define comparison assertions for compatibility tests
 - [ ] Implement web `jamClient` shim compatibility layer
@@ -15,6 +15,15 @@ Build a web-client-backed `jamClient` compatibility path plus a simulator/test h
 - [ ] Build MVP web-to-web session flow
 - [ ] Build simulator/replay harness and automated specs
 
+## 2026-03-01 WebRTC Planning Update
+- Captured native reference logs for 2-party mute/volume scenario in:
+  - `web/ai/native-client-2p-recording/20260228-210957-seth-native-2p-mute-volume.log`
+  - `web/ai/native-client-2p-recording/20260228-211006-david-native-2p-mute-volume.log`
+- Confirmed these are sufficient as baseline artifacts for bridge-call and REST/websocket pattern parity while implementing web-client media with selective behavioral divergence.
+- Added execution plan in `agent-tasks/client-simulator/webrtc-web-client-plan/progress.md`.
+- Added Tier A/B/C contract matrix from the captured logs in:
+  - `web/ai/native-client-2p-recording/contract-matrix.md`
+
 ## Notes
 - Native recording execution is intentionally out of scope for this effort (native path is being deprecated).
 - Recording/comparison scope must include REST API requests/responses in addition to bridge/events/websocket/DB behavior.

web/app/assets/javascripts/application.js

@@ -54,6 +54,7 @@
 //= require AAA_Log
 //= require globals
 //= require debug_log_collector
+//= require mode_flags_overlay
 //= require AAB_message_factory
 //= require jam_rest
 //= require ga

web/app/assets/javascripts/client_bundles/application_client_modern.js

@@ -54,6 +54,7 @@
 //= require AAA_Log
 //= require globals
 //= require debug_log_collector
+//= require mode_flags_overlay
 //= require AAB_message_factory
 //= require jam_rest
 //= require ga

web/app/assets/javascripts/homeScreen.js

@@ -28,14 +28,26 @@
             $(this).removeClass('hover');
         }
 
-        function switchClientMode(e) {
+        function setWebClientWebRtcFlag(enabled) {
-            // ctrl + shift + 0
+            try {
-            if(e.ctrlKey && e.shiftKey && e.keyCode == 48) {
+                if (!window.localStorage) { return; }
-                logger.debug("switch client mode!");
+                if (enabled) {
-                var act_as_native_client = $.cookie('act_as_native_client');
+                    window.localStorage.setItem('jk.webClient.webrtc', '1');
+                }
+                else {
+                    window.localStorage.removeItem('jk.webClient.webrtc');
+                }
+            }
+            catch(err) {
+                logger.warn("unable to update jk.webClient.webrtc localStorage flag", err);
+            }
+        }
 
-                logger.debug("currently: " + act_as_native_client);
+        function toggleActAsNativeClient() {
-                if(act_as_native_client == null || act_as_native_client != "true") {
+            var act_as_native_client = $.cookie('act_as_native_client');
+            var enable = (act_as_native_client == null || act_as_native_client != "true");
+
+            if(enable) {
                 logger.debug("forcing act as native client!");
                 $.cookie('act_as_native_client', 'true', { expires: 120, path: '/' });
             }
@@ -43,6 +55,29 @@
                 logger.debug("remove act as native client!");
                 $.removeCookie('act_as_native_client');
             }
+
+            return enable;
+        }
+
+        function switchClientMode(e) {
+            if(!(e.ctrlKey && e.shiftKey)) { return; }
+
+            // ctrl + shift + 0
+            if(e.keyCode == 48) {
+                logger.debug("switch client mode!");
+                toggleActAsNativeClient();
+                window.location.reload();
+                return;
+            }
+
+            // ctrl + shift + 9
+            // One-step toggle for web client mode:
+            // - act_as_native_client cookie
+            // - localStorage flag enabling WebRTC path in WebJamClient
+            if(e.keyCode == 57) {
+                logger.debug("switch web client mode (native-cookie + webrtc flag)!");
+                var enabled = toggleActAsNativeClient();
+                setWebClientWebRtcFlag(enabled);
                 window.location.reload();
             }
         }

web/app/assets/javascripts/jam_rest.js

@@ -594,6 +594,12 @@
     }
 
     function deleteParticipant(clientId) {
+      if (context.JK && context.JK.DebugLogCollector && context.JK.DebugLogCollector.push) {
+        context.JK.DebugLogCollector.push("leave-source.rest.deleteParticipant", {
+          client_id: clientId,
+          stack: (new Error("jam_rest.deleteParticipant")).stack
+        });
+      }
       var url = "/api/participants/" + clientId;
       return $.ajax({
         type: "DELETE",

web/app/assets/javascripts/react-components/actions/SessionActions.js.coffee

@@ -51,3 +51,29 @@ if @SessionActions?.joinSession?
       originalTrigger.apply(originalJoinAction, arguments)
 
   @SessionActions.joinSession = wrappedJoinAction
+
+pushLeaveActionTrace = (source, argsLike) ->
+  return unless context.JK?.DebugLogCollector?.push
+  args = Array::slice.call(argsLike ? [])
+  context.JK.DebugLogCollector.push("leave-source.session-action", {
+    source: source
+    args: args
+    stack: (new Error("SessionActions.leaveSession")).stack
+  })
+
+if @SessionActions?.leaveSession?
+  originalLeaveAction = @SessionActions.leaveSession
+  wrappedLeaveAction = ->
+    pushLeaveActionTrace('call', arguments)
+    originalLeaveAction.apply(this, arguments)
+
+  for own key, value of originalLeaveAction
+    wrappedLeaveAction[key] = value
+
+  if originalLeaveAction.trigger?
+    originalLeaveTrigger = originalLeaveAction.trigger
+    wrappedLeaveAction.trigger = ->
+      pushLeaveActionTrace('trigger', arguments)
+      originalLeaveTrigger.apply(originalLeaveAction, arguments)
+
+  @SessionActions.leaveSession = wrappedLeaveAction

web/app/assets/javascripts/react-components/mixins/SessionMyTracksMixin.js.coffee

@@ -65,6 +65,7 @@ MIDI_TRACK = context.JK.MIDI_TRACK
 
           # find any VST info
           if hasMixer && @configureTracks?
+            vstAssignments = @configureTracks?.vstTrackAssignments?.vsts ? []
 
             # bug in the backend; track is wrong for personal mixers (always 1), but correct for master mix
             trackAssignment = -1
@@ -79,7 +80,7 @@ MIDI_TRACK = context.JK.MIDI_TRACK
               else
                 trackAssignment = mixerData.oppositeMixer?.track
 
-            for vst in @configureTracks.vstTrackAssignments.vsts
+            for vst in vstAssignments
               if vst.track == trackAssignment - 1 && vst.name != 'NONE'
                 logger.debug("found VST on track", vst, track)
                 associatedVst = vst

web/app/assets/javascripts/react-components/stores/ConfigureTracksStore.js.coffee

@@ -242,6 +242,8 @@ void removeSearchPath(int typeId, QString pathToRemove);
     # the backend does not have a consistent way of tracking assigned inputs for midi.
     # let's make it seem consistent
     injectMidiToTrackAssignments: () ->
+      return unless @trackAssignments?.inputs?.assigned?
+      return unless @vstTrackAssignments?.vsts?
       if @vstTrackAssignments?
         for vst in @vstTrackAssignments.vsts
           if vst.track == MIDI_TRACK - 1
@@ -263,26 +265,28 @@ void removeSearchPath(int typeId, QString pathToRemove);
     changed: () ->
 
       @injectMidiToTrackAssignments()
+      assignedInputs = @trackAssignments?.inputs?.assigned ? []
+      vstAssignments = @vstTrackAssignments?.vsts ? []
 
       @editingTrack = []
       @editingTrack.assignment = @trackNumber
 
       if @trackNumber?
 
-        for inputsForTrack in @trackAssignments.inputs.assigned
+        for inputsForTrack in assignedInputs
           if inputsForTrack.assignment == @trackNumber
             @editingTrack = inputsForTrack
             break
 
 
       # slap on vst, if any, from list of vst assignments
-      for vst in @vstTrackAssignments.vsts
+      for vst in vstAssignments
         if vst.track == @editingTrack.assignment - 1
           @editingTrack.vst = vst
           @editingTrack.midiDeviceIndex = vst.midiDeviceIndex
           break
 
-        for inputsForTrack in @trackAssignments.inputs.assigned
+        for inputsForTrack in assignedInputs
           if vst.track == inputsForTrack.assignment - 1
             inputsForTrack.vst = vst
 
@@ -290,7 +294,7 @@ void removeSearchPath(int typeId, QString pathToRemove);
         logger.debug("current track has a VST assigned:" + @editingTrack.vst.file)
 
 
-      unscanned = !@scannedBefore && @vstPluginList.vsts.length <= 1
+      unscanned = !@scannedBefore && ((@vstPluginList?.vsts?.length ? 0) <= 1)
 
       @item = {
         unscanned: unscanned,

web/app/assets/javascripts/react-components/stores/SessionStore.js.coffee

@@ -1169,6 +1169,12 @@ if context.JK?.DebugLogCollector?.push
     # called by anyone wanting to leave the session with a certain behavior
     onLeaveSession: (behavior) ->
       logger.debug("attempting to leave session", behavior)
+      if context.JK?.DebugLogCollector?.push
+        context.JK.DebugLogCollector.push("leave-source.session-store.legacy-onLeaveSession", {
+          behavior: behavior
+          current_session_id: @currentSessionId
+          stack: (new Error("SessionStoreLegacy.onLeaveSession")).stack
+        })
 
       if behavior.notify
         @app.layout.notify(behavior.notify)

web/app/assets/javascripts/react-components/stores/SessionStoreModern.es6

@@ -809,6 +809,23 @@ if (shouldInstallModernSessionStore) {
     },
 
     async onJoinSessionDone(musicSession) {
+      const pushJoinAbort = (reason, detail) => {
+        context.__jkJoinAborts = context.__jkJoinAborts || [];
+        context.__jkJoinAborts.push({
+          ts: (new Date()).toISOString(),
+          reason,
+          detail,
+          current_session_id: this.currentSessionId
+        });
+        if (context.JK && context.JK.DebugLogCollector && context.JK.DebugLogCollector.push) {
+          context.JK.DebugLogCollector.push("join-source.session-store.modern-abort", {
+            reason,
+            detail,
+            current_session_id: this.currentSessionId,
+            stack: (new Error("SessionStoreModern.onJoinSessionDone.abort")).stack
+          });
+        }
+      };
       const musicianAccessOnJoin = musicSession.musician_access;
       const shouldVerifyNetwork = musicSession.musician_access;
 
@@ -827,6 +844,7 @@ if (shouldInstallModernSessionStore) {
       try {
         await this.gearUtils.guardAgainstInvalidConfiguration(this.app, shouldVerifyNetwork);
       } catch (e) {
+        pushJoinAbort("guardAgainstInvalidConfiguration", {error: String(e)});
         SessionActions.leaveSession.trigger({location: '/client#/home'});
         return;
       }
@@ -848,6 +866,7 @@ if (shouldInstallModernSessionStore) {
           leaveBehavior.location = '/client#/home';
         }
 
+        pushJoinAbort("guardAgainstActiveProfileMissing", data);
         SessionActions.leaveSession.trigger(leaveBehavior);
         return;
       }
@@ -864,6 +883,7 @@ if (shouldInstallModernSessionStore) {
           context.JK.alertSupportedNeeded('Unable to determine configured tracks due to reason: ' + data);
         }
 
+        pushJoinAbort("waitForSessionPageEnterDone", {error: data});
         SessionActions.leaveSession.trigger({location: '/client#/home'});
         return;
       }
@@ -1250,6 +1270,13 @@ if (shouldInstallModernSessionStore) {
 
 
     leaveSessionRest() {
+      if (context.JK && context.JK.DebugLogCollector && context.JK.DebugLogCollector.push) {
+        context.JK.DebugLogCollector.push("leave-source.session-store.modern-leaveSessionRest", {
+          current_session_id: this.currentSessionId,
+          client_id: this.app && this.app.clientId,
+          stack: (new Error("SessionStoreModern.leaveSessionRest")).stack
+        });
+      }
       return rest.deleteParticipant(this.app.clientId);
     },
 
@@ -1436,6 +1463,13 @@ if (shouldInstallModernSessionStore) {
     // called by anyone wanting to leave the session with a certain behavior
     onLeaveSession(behavior) {
       logger.debug("attempting to leave session", behavior);
+      if (context.JK && context.JK.DebugLogCollector && context.JK.DebugLogCollector.push) {
+        context.JK.DebugLogCollector.push("leave-source.session-store.modern-onLeaveSession", {
+          behavior: behavior,
+          current_session_id: this.currentSessionId,
+          stack: (new Error("SessionStoreModern.onLeaveSession")).stack
+        });
+      }
 
       if (behavior.notify) {
         this.app.layout.notify(behavior.notify);

web/app/assets/javascripts/sessionModel.js

@@ -631,6 +631,13 @@
         }
 
         function leaveSessionRest(sessionId) {
+            if (context.JK && context.JK.DebugLogCollector && context.JK.DebugLogCollector.push) {
+                context.JK.DebugLogCollector.push("leave-source.session-model.leaveSessionRest", {
+                    session_id: sessionId,
+                    client_id: clientId,
+                    stack: (new Error("SessionModel.leaveSessionRest")).stack
+                });
+            }
             var url = "/api/participants/" + clientId;
             return $.ajax({
                 type: "DELETE",

web/app/assets/javascripts/webJamClient.js

@@ -29,6 +29,20 @@
         stream: null,
         error: null,
         autoStartEnabled: false
+      },
+      controlState: {
+        master: {},
+        personal: {},
+        initialized: {
+          master: false,
+          personal: false
+        }
+      },
+      participants: {},
+      webrtc: {
+        enabled: false,
+        peerConnections: {},
+        localClientId: null
       }
     };
 
@@ -228,6 +242,352 @@
       pushRecord({kind: "webClientMediaStatus", status: state.localMedia.status});
     }
 
+    function ensureLocalMediaForWebRtc() {
+      if (!state.webrtc.enabled) { return; }
+      if (!context.navigator || !context.navigator.mediaDevices || !context.navigator.mediaDevices.getUserMedia) {
+        return;
+      }
+      if (state.localMedia.status === "requesting" || state.localMedia.status === "active") {
+        return;
+      }
+
+      state.localMedia.status = "requesting";
+      state.localMedia.error = null;
+      pushRecord({kind: "webClientMediaStatus", status: state.localMedia.status, reason: "webrtc"});
+
+      context.navigator.mediaDevices.getUserMedia({audio: true, video: false})
+        .then(function(stream) {
+          state.localMedia.stream = stream;
+          state.localMedia.status = "active";
+          state.localMedia.error = null;
+          pushRecord({
+            kind: "webClientMediaStatus",
+            status: state.localMedia.status,
+            reason: "webrtc",
+            tracks: stream && stream.getAudioTracks ? stream.getAudioTracks().length : 0
+          });
+
+          Object.keys(state.webrtc.peerConnections).forEach(function(clientId) {
+            var entry = state.webrtc.peerConnections[clientId];
+            if (entry && entry.pc) {
+              addLocalTracksToPeerConnection(entry.pc);
+            }
+          });
+        })
+        .catch(function(err) {
+          state.localMedia.stream = null;
+          state.localMedia.status = "failed";
+          state.localMedia.error = (err && err.name) ? err.name : String(err);
+          pushRecord({
+            kind: "webClientMediaStatus",
+            status: state.localMedia.status,
+            reason: "webrtc",
+            error: state.localMedia.error
+          });
+        });
+    }
+
+    function modeKey(isMasterOrPersonal) {
+      return isMasterOrPersonal ? "master" : "personal";
+    }
+
+    function deepClone(value) {
+      return safeSerialize(value);
+    }
+
+    function getJamServer() {
+      return context.JK && context.JK.JamServer ? context.JK.JamServer : null;
+    }
+
+    function getSelfClientId() {
+      if (state.webrtc.localClientId) { return state.webrtc.localClientId; }
+      if (state.app && state.app.clientId) { return state.app.clientId; }
+      var server = getJamServer();
+      if (server && server.clientID) { return server.clientID; }
+      return null;
+    }
+
+    function readWebRtcEnabledFlag() {
+      return !!context.JK_WEB_CLIENT_WEBRTC_ENABLED ||
+        readLocalStorageFlag("jk.webClient.webrtc") ||
+        !!(context.gon && context.gon.web_client_webrtc_enabled);
+    }
+
+    function ensureControlStateCache(isMasterOrPersonal) {
+      var key = modeKey(isMasterOrPersonal);
+      if (state.controlState.initialized[key]) {
+        return;
+      }
+
+      var delegateState = invokeDelegate("SessionGetAllControlState", [isMasterOrPersonal]);
+      var byId = {};
+      if (delegateState && delegateState.length) {
+        delegateState.forEach(function(mixer) {
+          if (!mixer || !mixer.id) { return; }
+          byId[mixer.id] = deepClone(mixer);
+        });
+      }
+
+      state.controlState[key] = byId;
+      state.controlState.initialized[key] = true;
+    }
+
+    var syncTracksTimer = null;
+    function scheduleTrackSync() {
+      if (!context.MixerActions || !context.MixerActions.syncTracks) { return; }
+      if (syncTracksTimer) {
+        context.clearTimeout(syncTracksTimer);
+      }
+      syncTracksTimer = context.setTimeout(function() {
+        syncTracksTimer = null;
+        try {
+          context.MixerActions.syncTracks();
+          pushRecord({kind: "webClientTrackSync", source: "SessionSetControlState"});
+        } catch (e) {
+          pushRecord({
+            kind: "webClientTrackSyncError",
+            error: (e && e.message) ? e.message : String(e)
+          });
+        }
+      }, 50);
+    }
+
+    function applyTrackVolumeToCache(mixerId, isMasterOrPersonal) {
+      ensureControlStateCache(isMasterOrPersonal);
+      var key = modeKey(isMasterOrPersonal);
+      var cache = state.controlState[key];
+      var existing = cache[mixerId] || {};
+      var trackVolume = context.trackVolumeObject || {};
+
+      var updated = deepClone(existing) || {};
+      updated.id = mixerId;
+      updated.master = !!isMasterOrPersonal;
+      updated.monitor = !isMasterOrPersonal;
+      if (trackVolume.clientID !== undefined) { updated.client_id = trackVolume.clientID; }
+      if (trackVolume.mute !== undefined) { updated.mute = !!trackVolume.mute; }
+      if (trackVolume.volL !== undefined) { updated.volume_left = trackVolume.volL; }
+      if (trackVolume.volR !== undefined) { updated.volume_right = trackVolume.volR; }
+      if (trackVolume.pan !== undefined) { updated.pan = trackVolume.pan; }
+      if (trackVolume.loop !== undefined) { updated.loop = !!trackVolume.loop; }
+      if (trackVolume.name !== undefined) { updated.name = trackVolume.name; }
+      if (trackVolume.record !== undefined) { updated.record = !!trackVolume.record; }
+      if (updated.range_low === undefined) { updated.range_low = -80; }
+      if (updated.range_high === undefined) { updated.range_high = 20; }
+
+      cache[mixerId] = updated;
+      return updated;
+    }
+
+    function updateLocalTrackMuteFromControlState(controlState) {
+      if (!controlState) { return; }
+      if (!state.localMedia.stream || !state.localMedia.stream.getAudioTracks) { return; }
+
+      var trackClientId = controlState.client_id || "";
+      var selfClientId = getSelfClientId();
+      var isSelfControl = !trackClientId || (selfClientId && trackClientId === selfClientId);
+      if (!isSelfControl) { return; }
+
+      var shouldMute = !!controlState.mute;
+      state.localMedia.stream.getAudioTracks().forEach(function(track) {
+        try {
+          track.enabled = !shouldMute;
+        } catch (e) {}
+      });
+    }
+
+    function getPeerConnectionCtor() {
+      return context.RTCPeerConnection || context.webkitRTCPeerConnection || context.mozRTCPeerConnection;
+    }
+
+    function sendWebRtcSignal(receiverClientId, payload) {
+      var server = getJamServer();
+      if (!server || typeof server.sendP2PMessage !== "function") {
+        pushRecord({kind: "webrtc.signalDropped", reason: "jamServerUnavailable", to: receiverClientId});
+        return;
+      }
+
+      var envelope = {
+        jk_webclient_webrtc: true,
+        session_id: state.currentSessionId,
+        from_client_id: getSelfClientId(),
+        payload: payload
+      };
+
+      try {
+        server.sendP2PMessage(receiverClientId, JSON.stringify(envelope));
+        pushRecord({
+          kind: "webrtc.signalSent",
+          to: receiverClientId,
+          signal_type: payload && payload.type ? payload.type : "candidate"
+        });
+      } catch (e) {
+        pushRecord({
+          kind: "webrtc.signalSendError",
+          to: receiverClientId,
+          error: (e && e.message) ? e.message : String(e)
+        });
+      }
+    }
+
+    function addLocalTracksToPeerConnection(peerConnection) {
+      if (!peerConnection || !state.localMedia.stream || !state.localMedia.stream.getTracks) {
+        return;
+      }
+
+      var stream = state.localMedia.stream;
+      stream.getTracks().forEach(function(track) {
+        try {
+          peerConnection.addTrack(track, stream);
+        } catch (e) {}
+      });
+    }
+
+    function closePeerConnection(clientId) {
+      var entry = state.webrtc.peerConnections[clientId];
+      if (!entry) { return; }
+      try {
+        if (entry.pc && typeof entry.pc.close === "function") {
+          entry.pc.close();
+        }
+      } catch (e) {}
+      delete state.webrtc.peerConnections[clientId];
+      pushRecord({kind: "webrtc.peerClosed", client_id: clientId});
+    }
+
+    function ensurePeerConnection(clientId) {
+      if (!state.webrtc.enabled || !clientId) { return null; }
+      if (state.webrtc.peerConnections[clientId]) {
+        return state.webrtc.peerConnections[clientId];
+      }
+
+      var RTCPeerConnectionCtor = getPeerConnectionCtor();
+      if (!RTCPeerConnectionCtor) {
+        pushRecord({kind: "webrtc.unavailable", reason: "RTCPeerConnection"});
+        return null;
+      }
+
+      var iceServers = (context.gon && context.gon.web_client_ice_servers) || [];
+      var peerConnection = null;
+      try {
+        peerConnection = new RTCPeerConnectionCtor({iceServers: iceServers});
+      } catch (e) {
+        pushRecord({
+          kind: "webrtc.peerCreateError",
+          client_id: clientId,
+          error: (e && e.message) ? e.message : String(e)
+        });
+        return null;
+      }
+
+      var entry = {
+        client_id: clientId,
+        pc: peerConnection
+      };
+      state.webrtc.peerConnections[clientId] = entry;
+
+      addLocalTracksToPeerConnection(peerConnection);
+
+      peerConnection.onicecandidate = function(evt) {
+        if (!evt || !evt.candidate) { return; }
+        sendWebRtcSignal(clientId, {
+          type: "candidate",
+          candidate: evt.candidate
+        });
+      };
+
+      peerConnection.onconnectionstatechange = function() {
+        pushRecord({
+          kind: "webrtc.connectionState",
+          client_id: clientId,
+          state: peerConnection.connectionState
+        });
+      };
+
+      peerConnection.ontrack = function(evt) {
+        entry.remoteStream = evt && evt.streams && evt.streams.length ? evt.streams[0] : null;
+        pushRecord({
+          kind: "webrtc.remoteTrack",
+          client_id: clientId,
+          has_stream: !!entry.remoteStream
+        });
+      };
+
+      pushRecord({kind: "webrtc.peerCreated", client_id: clientId});
+      return entry;
+    }
+
+    function maybeCreateOffer(clientId) {
+      var entry = ensurePeerConnection(clientId);
+      if (!entry || !entry.pc || typeof entry.pc.createOffer !== "function") { return; }
+
+      entry.pc.createOffer()
+        .then(function(offer) {
+          return entry.pc.setLocalDescription(offer).then(function() {
+            sendWebRtcSignal(clientId, {type: "offer", sdp: offer});
+          });
+        })
+        .catch(function(err) {
+          pushRecord({
+            kind: "webrtc.offerError",
+            client_id: clientId,
+            error: (err && err.message) ? err.message : String(err)
+          });
+        });
+    }
+
+    function onWebRtcSignal(fromClientId, signalPayload) {
+      if (!state.webrtc.enabled || !signalPayload || !fromClientId) { return false; }
+      var entry = ensurePeerConnection(fromClientId);
+      if (!entry || !entry.pc) { return true; }
+
+      var pc = entry.pc;
+      if (signalPayload.type === "offer") {
+        pc.setRemoteDescription(signalPayload.sdp)
+          .then(function() {
+            return pc.createAnswer();
+          })
+          .then(function(answer) {
+            return pc.setLocalDescription(answer).then(function() {
+              sendWebRtcSignal(fromClientId, {type: "answer", sdp: answer});
+            });
+          })
+          .catch(function(err) {
+            pushRecord({
+              kind: "webrtc.answerError",
+              client_id: fromClientId,
+              error: (err && err.message) ? err.message : String(err)
+            });
+          });
+        return true;
+      }
+
+      if (signalPayload.type === "answer") {
+        pc.setRemoteDescription(signalPayload.sdp).catch(function(err) {
+          pushRecord({
+            kind: "webrtc.setAnswerError",
+            client_id: fromClientId,
+            error: (err && err.message) ? err.message : String(err)
+          });
+        });
+        return true;
+      }
+
+      if (signalPayload.type === "candidate") {
+        if (signalPayload.candidate && typeof pc.addIceCandidate === "function") {
+          pc.addIceCandidate(signalPayload.candidate).catch(function(err) {
+            pushRecord({
+              kind: "webrtc.addCandidateError",
+              client_id: fromClientId,
+              error: (err && err.message) ? err.message : String(err)
+            });
+          });
+        }
+        return true;
+      }
+
+      return false;
+    }
+
     function installInstrumentationWrappers(target) {
       Object.keys(target).forEach(function(key) {
         var original = target[key];
@@ -309,6 +669,11 @@
             error: state.localMedia.error,
             hasStream: !!state.localMedia.stream,
             autoStartEnabled: !!state.localMedia.autoStartEnabled
+          },
+          webrtc: {
+            enabled: !!state.webrtc.enabled,
+            localClientId: getSelfClientId(),
+            peerCount: Object.keys(state.webrtc.peerConnections).length
           }
         },
         recorder: {
@@ -384,6 +749,9 @@
       }
       pushRecord({kind: "webClientSessionState", event: "JoinSession", session: safeSerialize(sessionDescriptor)});
       startLocalMediaIfEnabled();
+      if (state.webrtc.enabled) {
+        ensureLocalMediaForWebRtc();
+      }
       return invokeDelegate("JoinSession", arguments);
     };
 
@@ -391,17 +759,132 @@
       state.inSession = false;
       state.currentSessionId = null;
       pushRecord({kind: "webClientSessionState", event: "LeaveSession", session: safeSerialize(sessionDescriptor)});
+      Object.keys(state.webrtc.peerConnections).forEach(function(clientId) {
+        closePeerConnection(clientId);
+      });
       if (!state.inSessionPage) {
         stopLocalMedia();
       }
       return invokeDelegate("LeaveSession", arguments);
     };
 
+    this.SessionGetAllControlState = function(isMasterOrPersonal) {
+      ensureControlStateCache(isMasterOrPersonal);
+      var key = modeKey(isMasterOrPersonal);
+      var values = Object.keys(state.controlState[key]).map(function(mixerId) {
+        return deepClone(state.controlState[key][mixerId]);
+      });
+      pushRecord({
+        kind: "webClientControlStateRead",
+        mode: key,
+        count: values.length
+      });
+      return values;
+    };
+
+    this.SessionSetControlState = function(mixerId, isMasterOrPersonal) {
+      var updated = applyTrackVolumeToCache(mixerId, isMasterOrPersonal);
+      updateLocalTrackMuteFromControlState(updated);
+
+      if (context.trackVolumeObject && context.trackVolumeObject.broadcast) {
+        scheduleTrackSync();
+      }
+
+      pushRecord({
+        kind: "webClientControlStateSet",
+        mixer_id: mixerId,
+        mode: modeKey(isMasterOrPersonal),
+        state: deepClone(updated),
+        broadcast: !!(context.trackVolumeObject && context.trackVolumeObject.broadcast)
+      });
+
+      return invokeDelegate("SessionSetControlState", arguments);
+    };
+
+    this.UpdateSessionInfo = function(sessionInfo) {
+      if (sessionInfo && sessionInfo.id) {
+        state.currentSessionId = sessionInfo.id;
+      }
+
+      if (sessionInfo && sessionInfo.participants && sessionInfo.participants.length) {
+        var nextParticipants = {};
+        sessionInfo.participants.forEach(function(participant) {
+          if (!participant || !participant.client_id) { return; }
+          nextParticipants[participant.client_id] = deepClone(participant);
+        });
+        state.participants = nextParticipants;
+      }
+
+      return invokeDelegate("UpdateSessionInfo", arguments);
+    };
+
+    this.ParticipantJoined = function(session, participant) {
+      if (participant && participant.client_id) {
+        state.participants[participant.client_id] = deepClone(participant);
+        if (state.webrtc.enabled) {
+          var selfClientId = getSelfClientId();
+          if (participant.client_id !== selfClientId) {
+            maybeCreateOffer(participant.client_id);
+          }
+        }
+      }
+      return invokeDelegate("ParticipantJoined", arguments);
+    };
+
+    this.ParticipantLeft = function(session, participant) {
+      if (participant && participant.client_id) {
+        delete state.participants[participant.client_id];
+        closePeerConnection(participant.client_id);
+      }
+      return invokeDelegate("ParticipantLeft", arguments);
+    };
+
+    this.ClientJoinedSession = function(sourceUserId, clientId, sessionId) {
+      if (clientId) {
+        state.participants[clientId] = state.participants[clientId] || {client_id: clientId};
+        if (state.webrtc.enabled) {
+          var selfClientId = getSelfClientId();
+          if (clientId !== selfClientId) {
+            maybeCreateOffer(clientId);
+          }
+        }
+      }
+      return invokeDelegate("ClientJoinedSession", arguments);
+    };
+
+    this.ClientLeftSession = function(sourceUserId, clientId, sessionId) {
+      if (clientId) {
+        delete state.participants[clientId];
+        closePeerConnection(clientId);
+      }
+      return invokeDelegate("ClientLeftSession", arguments);
+    };
+
+    this.P2PMessageReceived = function(from, payload) {
+      var parsedPayload = payload;
+      if (typeof parsedPayload === "string") {
+        try {
+          parsedPayload = JSON.parse(parsedPayload);
+        } catch (e) {}
+      }
+
+      if (parsedPayload && parsedPayload.jk_webclient_webrtc && parsedPayload.payload) {
+        onWebRtcSignal(from, parsedPayload.payload);
+      }
+
+      return invokeDelegate("P2PMessageReceived", [from, payload]);
+    };
+
     // Keep a handle to the delegate for incremental replacement/testing.
     this.__delegate = inner;
     this.__state = state;
     this.__recorder = recorder;
 
+    state.webrtc.enabled = readWebRtcEnabledFlag();
+    if (state.webrtc.enabled) {
+      pushRecord({kind: "webrtc.enabled"});
+    }
+
     recorder.enabled = recorderEnabledByDefault();
     if (recorder.enabled) {
       pushRecord({kind: "webClientRecorder", action: "auto-enable"});

web/app/helpers/client_helper.rb

@@ -93,5 +93,7 @@ module ClientHelper
     gon.stripe_publishable_key = Rails.application.config.stripe[:publishable_key]
     gon.spa_origin_url = Rails.application.config.spa_origin_url
     gon.log_to_server = (ENV['LOG_TO_SERVER'].to_s == '1')
+    gon.legacy_qt_webkit_client = legacy_qt_webkit_client?
+    gon.show_mode_flags_overlay = Rails.env.development?
   end
 end

web/package.json

@@ -1,16 +1,22 @@
 {
   "name": "jam-web",
+  "scripts": {
+    "test:playwright": "npx playwright test -c spec/playwright/playwright.config.js",
+    "test:playwright:headed": "HEADLESS=false npx playwright test -c spec/playwright/playwright.config.js"
+  },
   "dependencies": {
     "browserify": "~> 6.3",
     "browserify-incremental": "^1.4.0",
-    "coffeeify": "~> 0.6",
-    "reactify": "^0.17.1",
     "coffee-reactify": "~>3.0.0",
+    "coffeeify": "~> 0.6",
     "react": "^0.12.0",
-    "react-tools": "^0.12.1"
+    "react-tools": "^0.12.1",
+    "reactify": "^0.17.1"
   },
-
   "engines": {
     "node": ">= 0.10"
+  },
+  "devDependencies": {
+    "@playwright/test": "^1.58.2"
   }
 }