fix: address P0-4 chat zombie, P0-5 double SessionStarted, P0-6 steering wrong content

core/events/src/main/kotlin/com/correx/core/events/events/SessionEvents.kt

@@ -38,3 +38,9 @@ data class SessionFailedEvent(
     val errorCode: String? = null,
     val errorMessage: String? = null
 ) : EventPayload
+
+@Serializable
+@SerialName("ChatSessionStarted")
+data class ChatSessionStartedEvent(
+    val sessionId: SessionId,
+) : EventPayload

core/events/src/main/kotlin/com/correx/core/events/orchestration/OrchestrationStatus.kt

@@ -2,6 +2,7 @@ package com.correx.core.events.orchestration
 
 enum class OrchestrationStatus {
     IDLE,
+    CHAT,
     RUNNING,
     PAUSED,
     COMPLETED,

core/events/src/main/kotlin/com/correx/core/events/serialization/Serialization.kt

@@ -30,6 +30,7 @@ import com.correx.core.events.events.RetryAttemptedEvent
 import com.correx.core.events.events.RiskAssessedEvent
 import com.correx.core.events.events.SessionCompletedEvent
 import com.correx.core.events.events.SessionFailedEvent
+import com.correx.core.events.events.ChatSessionStartedEvent
 import com.correx.core.events.events.SessionPausedEvent
 import com.correx.core.events.events.SessionResumedEvent
 import com.correx.core.events.events.SessionStartedEvent
@@ -101,6 +102,7 @@ val eventModule = SerializersModule {
         subclass(WorkflowCompletedEvent::class)
         subclass(RetryAttemptedEvent::class)
         subclass(RiskAssessedEvent::class)
+        subclass(ChatSessionStartedEvent::class)
     }
 }
 

core/kernel/src/main/kotlin/com/correx/core/kernel/orchestration/DefaultOrchestrationReducer.kt

@@ -1,5 +1,6 @@
 package com.correx.core.kernel.orchestration
 
+import com.correx.core.events.events.ChatSessionStartedEvent
 import com.correx.core.events.events.OrchestrationPausedEvent
 import com.correx.core.events.events.OrchestrationResumedEvent
 import com.correx.core.events.events.RetryAttemptedEvent
@@ -16,6 +17,12 @@ class DefaultOrchestrationReducer : OrchestrationReducer {
         state: OrchestrationState,
         event: StoredEvent,
     ): OrchestrationState = when (val p = event.payload) {
+        is ChatSessionStartedEvent -> state.copy(
+            workflowId = "chat",
+            status = OrchestrationStatus.CHAT,
+            currentStageId = null,
+        )
+
         is WorkflowStartedEvent -> state.copy(
             workflowId = p.workflowId,
             status = OrchestrationStatus.RUNNING,

core/router/src/main/kotlin/com/correx/core/router/RouterFacade.kt

@@ -1,10 +1,6 @@
 package com.correx.core.router
 
-import com.correx.core.events.events.EventMetadata
-import com.correx.core.events.events.NewEvent
-import com.correx.core.events.events.SteeringNoteAddedEvent
 import com.correx.core.events.stores.EventStore
-import com.correx.core.events.types.EventId
 import com.correx.core.events.types.InferenceRequestId
 import com.correx.core.events.types.SessionId
 import com.correx.core.events.types.StageId
@@ -71,24 +67,11 @@ class DefaultRouterFacade(
 
         history.add(RouterTurn(role = TurnRole.ROUTER, content = content, timestamp = Clock.System.now()))
 
-        if (mode == ChatMode.STEERING) {
-            val steeringEvent = SteeringNoteAddedEvent(
-                sessionId = sessionId,
-                content = input,
-                stageId = state.currentStageId,
-            )
-            eventStore.append(NewEvent(
-                metadata = EventMetadata(
-                    eventId = EventId(UUID.randomUUID().toString()),
-                    sessionId = sessionId,
-                    timestamp = Clock.System.now(),
-                    schemaVersion = 1,
-                    causationId = null,
-                    correlationId = null,
-                ),
-                payload = steeringEvent,
-            ))
-        }
+        // NOTE: SteeringNoteAddedEvent emission is deferred to P4-1, which will wire
+        // proper validation (via ValidationPipeline) and consumption by the context builder.
+        // The current SteeringNoteAddedEvent had wrong content (user raw input instead of
+        // LLM-processed steering text) and was emitted without validation (P0-6).
+        // The steeringEmitted flag below still informs the TUI that steering mode was used.
 
         return RouterResponse(content = content, steeringEmitted = (mode == ChatMode.STEERING))
     }