feat(server): intent input channel — StartSession.input seeds decision journal

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

@@ -0,0 +1,18 @@
+package com.correx.core.events.events
+
+import com.correx.core.events.types.SessionId
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * The freeform user request that kicked off a workflow run (e.g. "add an auth layer to the
+ * account service"). Recorded once at session start so it flows into the decision journal and
+ * is pinned into every stage's context — the input channel for intent-driven pipelines.
+ * Optional: fixed-task workflows (e.g. healthcheck) start without one.
+ */
+@Serializable
+@SerialName("InitialIntent")
+data class InitialIntentEvent(
+    val sessionId: SessionId,
+    val intent: String,
+) : EventPayload

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

@@ -16,6 +16,7 @@ import com.correx.core.events.events.EventPayload
 import com.correx.core.events.events.FileWrittenEvent
 import com.correx.core.events.events.L3MemoryRetrievedEvent
 import com.correx.core.events.events.InferenceCompletedEvent
+import com.correx.core.events.events.InitialIntentEvent
 import com.correx.core.events.events.InferenceFailedEvent
 import com.correx.core.events.events.InferenceStartedEvent
 import com.correx.core.events.events.InferenceTimeoutEvent
@@ -58,6 +59,7 @@ val eventModule = SerializersModule {
         subclass(ToolCallAssessedEvent::class)
         subclass(FileWrittenEvent::class)
         subclass(SteeringNoteAddedEvent::class)
+        subclass(InitialIntentEvent::class)
         subclass(StageFailedEvent::class)
         subclass(StageCompletedEvent::class)
         subclass(TransitionExecutedEvent::class)

core/journal/src/main/kotlin/com/correx/core/journal/DefaultDecisionJournalReducer.kt

@@ -2,6 +2,7 @@ package com.correx.core.journal
 
 import com.correx.core.events.events.ApprovalDecisionResolvedEvent
 import com.correx.core.events.events.ArtifactValidatedEvent
+import com.correx.core.events.events.InitialIntentEvent
 import com.correx.core.events.events.RetryAttemptedEvent
 import com.correx.core.events.events.StageFailedEvent
 import com.correx.core.events.events.SteeringNoteAddedEvent
@@ -14,6 +15,11 @@ import com.correx.core.journal.model.DecisionRecord
 class DefaultDecisionJournalReducer : DecisionJournalReducer {
     override fun reduce(state: DecisionJournalState, event: StoredEvent): DecisionJournalState {
         val record = when (val p = event.payload) {
+            is InitialIntentEvent -> DecisionRecord(
+                sequence = event.sessionSequence,
+                kind = DecisionKind.INTENT,
+                summary = "Goal: ${p.intent}",
+            )
             is SteeringNoteAddedEvent -> DecisionRecord(
                 sequence = event.sessionSequence,
                 kind = DecisionKind.STEERING,

core/journal/src/main/kotlin/com/correx/core/journal/model/DecisionRecord.kt

@@ -2,7 +2,7 @@ package com.correx.core.journal.model
 
 import kotlinx.serialization.Serializable
 
-enum class DecisionKind { STEERING, APPROVAL, TRANSITION, RETRY, FAILURE, ARTIFACT }
+enum class DecisionKind { INTENT, STEERING, APPROVAL, TRANSITION, RETRY, FAILURE, ARTIFACT }
 
 /**
  * One distilled decision. [sequence] is the source event's sessionSequence, used for