diff --git a/apps/server/src/main/kotlin/com/correx/apps/server/bridge/DomainEventMapper.kt b/apps/server/src/main/kotlin/com/correx/apps/server/bridge/DomainEventMapper.kt
index 45a05760..528bd1a9 100644
--- a/apps/server/src/main/kotlin/com/correx/apps/server/bridge/DomainEventMapper.kt
+++ b/apps/server/src/main/kotlin/com/correx/apps/server/bridge/DomainEventMapper.kt
@@ -5,6 +5,7 @@ import com.correx.apps.server.protocol.RiskSummaryDto
 import com.correx.apps.server.protocol.ServerMessage
 import com.correx.core.artifactstore.ArtifactStore
 import com.correx.core.events.events.ApprovalRequestedEvent
+import com.correx.core.events.events.ArtifactCreatedEvent
 import com.correx.core.events.events.ChatSessionStartedEvent
 import com.correx.core.events.events.InferenceCompletedEvent
 import com.correx.core.events.events.WorkflowStartedEvent
@@ -157,6 +158,13 @@ suspend fun domainEventToServerMessage(
         )
 
         is ApprovalRequestedEvent -> mapApprovalRequested(p, seq, sessionSequence)
+        is ArtifactCreatedEvent -> ServerMessage.ArtifactCreated(
+            sessionId = p.sessionId,
+            stageId = p.stageId,
+            artifactId = p.artifactId,
+            sequence = seq,
+            sessionSequence = sessionSequence,
+        )
         else -> {
             log.debug(
                 "DomainEventMapper: unmapped payload type={} sessionId={} sequence={}",
diff --git a/apps/server/src/main/kotlin/com/correx/apps/server/bridge/SessionEventBridge.kt b/apps/server/src/main/kotlin/com/correx/apps/server/bridge/SessionEventBridge.kt
index fd9fdb79..1dd4331e 100644
--- a/apps/server/src/main/kotlin/com/correx/apps/server/bridge/SessionEventBridge.kt
+++ b/apps/server/src/main/kotlin/com/correx/apps/server/bridge/SessionEventBridge.kt
@@ -19,6 +19,7 @@ import com.correx.core.events.events.InferenceStartedEvent
 import com.correx.core.events.events.InferenceTimeoutEvent
 import com.correx.core.events.events.NewEvent
 import com.correx.core.events.events.ApprovalRequestedEvent
+import com.correx.core.events.events.ArtifactCreatedEvent
 import com.correx.core.events.events.OrchestrationPausedEvent
 import com.correx.core.events.events.OrchestrationResumedEvent
 import com.correx.core.events.events.StageCompletedEvent
@@ -183,6 +184,7 @@ class SessionEventBridge(
             is OrchestrationPausedEvent -> EventEntryDto(ts, "SessionPaused", p.reason)
             is WorkflowCompletedEvent -> EventEntryDto(ts, "SessionCompleted", "")
             is WorkflowFailedEvent -> EventEntryDto(ts, "SessionFailed", p.reason)
+            is ArtifactCreatedEvent -> EventEntryDto(ts, "ArtifactCreated", p.artifactId.value)
             else -> null
         }
     }
diff --git a/apps/server/src/main/kotlin/com/correx/apps/server/protocol/ServerMessage.kt b/apps/server/src/main/kotlin/com/correx/apps/server/protocol/ServerMessage.kt
index 53a60b6f..6372a75b 100644
--- a/apps/server/src/main/kotlin/com/correx/apps/server/protocol/ServerMessage.kt
+++ b/apps/server/src/main/kotlin/com/correx/apps/server/protocol/ServerMessage.kt
@@ -2,6 +2,7 @@ package com.correx.apps.server.protocol
 
 import com.correx.core.approvals.Tier
 import com.correx.core.events.types.ApprovalRequestId
+import com.correx.core.events.types.ArtifactId
 import com.correx.core.events.types.SessionId
 import com.correx.core.events.types.StageId
 import kotlinx.serialization.SerialName
@@ -251,6 +252,18 @@ sealed interface ServerMessage {
         override val sessionSequence: Long? = null,
     ) : ServerMessage, NonEventMessage
 
+    // -- Artifacts --
+
+    @Serializable
+    @SerialName("artifact.created")
+    data class ArtifactCreated(
+        val sessionId: SessionId,
+        val stageId: StageId,
+        val artifactId: ArtifactId,
+        override val sequence: Long,
+        override val sessionSequence: Long,
+    ) : ServerMessage, SessionMessage
+
     // -- Router --
 
     @Serializable
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/KeyEvent.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/KeyEvent.kt
index e00ae9a6..8e9fc9d2 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/KeyEvent.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/KeyEvent.kt
@@ -21,4 +21,5 @@ sealed class KeyEvent {
     object CursorRight : KeyEvent()
     object ToggleWorkflows : KeyEvent()
     object ToggleSteeringMode : KeyEvent()
+    object ToggleDiffExpand : KeyEvent()
 }
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/components/ApprovalSurface.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/components/ApprovalSurface.kt
index 9deb46d1..aa43089b 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/components/ApprovalSurface.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/components/ApprovalSurface.kt
@@ -26,6 +26,8 @@ fun approvalSurfaceWidget(state: TuiState): Paragraph {
     val approval = state.selectedPendingApproval()
     val pendingDecision = state.pendingDecision
 
+    val diffExpanded = state.diffExpanded
+
     val lines = buildList<Line> {
         if (approval == null) {
             add(Line.from(Span.styled("no pending approval", dimStyle)))
@@ -43,10 +45,14 @@ fun approvalSurfaceWidget(state: TuiState): Paragraph {
             if (preview != null) {
                 val previewLines = preview.lines()
                 if (previewLines.isNotEmpty()) {
-                    val visibleLines = previewLines.take(PREVIEW_MAX_LINES)
+                    val visibleLines = if (diffExpanded) {
+                        previewLines
+                    } else {
+                        previewLines.take(PREVIEW_MAX_LINES)
+                    }
                     for (line in visibleLines) {
                         if (isDiff) {
-                            val truncated = if (line.length > DIFF_LINE_MAX_LENGTH) {
+                            val truncated = if (line.length > DIFF_LINE_MAX_LENGTH && !diffExpanded) {
                                 line.take(DIFF_LINE_MAX_LENGTH - 3) + "..."
                             } else {
                                 line
@@ -63,9 +69,12 @@ fun approvalSurfaceWidget(state: TuiState): Paragraph {
                             add(Line.from(Span.raw("  $line")))
                         }
                     }
-                    if (previewLines.size > PREVIEW_MAX_LINES) {
+                    if (!diffExpanded && previewLines.size > PREVIEW_MAX_LINES) {
                         val remaining = previewLines.size - PREVIEW_MAX_LINES
-                        add(Line.from(Span.styled("  (preview truncated, $remaining more lines)", dimStyle)))
+                        add(Line.from(Span.styled("  (preview truncated, $remaining more lines — ctrl+x to expand)", dimStyle)))
+                    }
+                    if (diffExpanded) {
+                        add(Line.from(Span.styled("  (full diff — ctrl+x to collapse)", dimStyle)))
                     }
                 } else {
                     add(Line.from(Span.styled("  no preview available", dimStyle)))
@@ -87,7 +96,7 @@ fun approvalSurfaceWidget(state: TuiState): Paragraph {
 
             // Approve/reject key hints
             add(Line.from(Span.styled(
-                "  ctrl+a approve \u00B7 ctrl+r reject \u00B7 enter submit \u00B7 esc dismiss",
+                "  ctrl+a approve \u00B7 ctrl+r reject \u00B7 ctrl+x toggle diff \u00B7 enter submit \u00B7 esc dismiss",
                 dimStyle
             )))
         }
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/components/EventHistoryStrip.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/components/EventHistoryStrip.kt
index 64aef8a4..0eae49b6 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/components/EventHistoryStrip.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/components/EventHistoryStrip.kt
@@ -20,14 +20,13 @@ fun eventHistoryStripWidget(state: TuiState): Paragraph {
         } else {
             // Stage ID and status line (compact, dim metadata)
             val stageInfo = buildString {
-                if (selectedSession.currentStageId != null) {
-                    append(selectedSession.currentStageId)
+                val stageId = selectedSession.currentStageId
+                val stage = selectedSession.currentStage
+                when {
+                    stageId != null -> append(stageId)
+                    stage != null -> append(stage)
+                    else -> append("(no stage)")
                 }
-                if (selectedSession.currentStage != null) {
-                    if (isNotEmpty()) append(" · ")
-                    append(selectedSession.currentStage)
-                }
-                if (isEmpty()) append("(no stage)")
                 append("  ")
                 append(selectedSession.status)
             }
@@ -46,6 +45,7 @@ fun eventHistoryStripWidget(state: TuiState): Paragraph {
                         "StageFailed", "SessionFailed", "ToolFailed", "ToolRejected" -> Style.create().red()
                         "SessionPaused", "InferenceTimeout" -> Style.create().yellow()
                         "StageStarted", "InferenceStarted", "ToolStarted" -> Style.create().blue()
+                        "ArtifactCreated" -> Style.create().magenta()
                         else -> Style.create()
                     }
                     val detail = if (ev.detail.length > DETAIL_MAX) {
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/components/SessionList.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/components/SessionList.kt
index ab57e9e6..caa60103 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/components/SessionList.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/components/SessionList.kt
@@ -31,7 +31,11 @@ fun sessionListWidget(state: TuiState): Paragraph {
             val statusSpan = statusSpan(s)
             val rawName = s.name.ifEmpty { s.workflowId }
             val truncated = if (rawName.length > NAME_MAX) rawName.take(NAME_MAX - 1) + "…" else rawName
-            add(Line.from(prefix, idSpan, Span.raw(" "), statusSpan, Span.raw(" $truncated")))
+            val nameAndStage = buildString {
+                append(truncated)
+                if (s.currentStageId != null) append(" [${s.currentStageId}]")
+            }
+            add(Line.from(prefix, idSpan, Span.raw(" "), statusSpan, Span.raw(" $nameAndStage")))
         }
         if (overflow > 0) {
             add(Line.from(Span.styled("— $overflow more —", dimStyle)))
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/input/Action.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/input/Action.kt
index 05a978cd..6bfae68f 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/input/Action.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/input/Action.kt
@@ -28,5 +28,6 @@ sealed interface Action {
     data object CursorRight : Action
     data object ToggleWorkflows : Action
     data object CycleChatMode : Action
+    data object ToggleDiffExpand : Action
     data object NoOp : Action
 }
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/input/KeyResolver.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/input/KeyResolver.kt
index f6e5eb41..c1aa61a5 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/input/KeyResolver.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/input/KeyResolver.kt
@@ -74,6 +74,7 @@ object KeyResolver {
                 KeyEvent.Cancel -> Action.CancelInput
                 KeyEvent.ReturnToSessionList -> Action.ReturnToSessionList
                 KeyEvent.ToggleEventStrip -> Action.ToggleEventStrip
+                KeyEvent.ToggleDiffExpand -> Action.ToggleDiffExpand
                 KeyEvent.Tab -> Action.CycleMode
                 KeyEvent.Backspace -> Action.Backspace
                 is KeyEvent.CharInput -> Action.AppendChar(key.ch)
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/input/TambouiKeyMapper.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/input/TambouiKeyMapper.kt
index 04fc30d3..71ef85d2 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/input/TambouiKeyMapper.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/input/TambouiKeyMapper.kt
@@ -25,6 +25,7 @@ fun mapKey(event: TambouiKeyEvent): KeyEvent? {
             event.isChar('h') -> KeyEvent.ShowPendingApproval
             event.isChar('w') -> KeyEvent.ToggleWorkflows
             event.isChar('s') -> KeyEvent.ToggleSteeringMode
+            event.isChar('x') -> KeyEvent.ToggleDiffExpand
             else -> null
         }
     }
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/RootReducer.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/RootReducer.kt
index a2914342..c9855420 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/RootReducer.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/RootReducer.kt
@@ -118,6 +118,8 @@ object RootReducer {
                 else withBgReset.copy(eventStripVisible = !withBgReset.eventStripVisible)
             }
 
+            is Action.ToggleDiffExpand -> withBgReset.copy(diffExpanded = !withBgReset.diffExpanded)
+
             // Input history append on SubmitInput in IN_SESSION + ROUTER (ARCH-HISTORY-1),
             // or enter a selected session from the list in IDLE.
             is Action.SubmitInput -> {
@@ -167,6 +169,7 @@ object RootReducer {
                     }
                     msg is ServerMessage.RouterResponseMessage -> {
                         withBgReset.copy(
+                            routerConnected = true,
                             routerMessages = withBgReset.routerMessages.run {
                                 val key = msg.sessionId.value
                                 this + (key to (this[key].orEmpty() + msg.content))
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/SessionsReducer.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/SessionsReducer.kt
index d2be71bf..99a96dce 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/SessionsReducer.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/reducer/SessionsReducer.kt
@@ -207,6 +207,7 @@ object SessionsReducer {
             is ServerMessage.SessionSnapshot -> processSessionSnapshotMessage(clock, sessions, msg)
             is ServerMessage.ApprovalRequired -> processApprovalRequiredMessage(sessions, msg)
             is ServerMessage.StageToolManifest -> processStageToolManifestMessage(sessions, msg)
+            is ServerMessage.ArtifactCreated -> processArtifactCreatedMessage(sessions, msg)
             is ServerMessage.WorkflowList -> processWorkflowListMessage(sessions, msg)
             else -> sessions to emptyList()
         }
@@ -231,6 +232,7 @@ object SessionsReducer {
         is ServerMessage.ToolRejected -> msg.sessionId.value
         is ServerMessage.ApprovalRequired -> msg.sessionId.value
         is ServerMessage.SessionSnapshot -> msg.sessionId.value
+        is ServerMessage.ArtifactCreated -> msg.sessionId.value
         // Control/non-event messages do not count per ARCH-BADGE-1:
         is ServerMessage.StageToolManifest -> null
         is ServerMessage.SnapshotComplete -> null
@@ -627,6 +629,30 @@ object SessionsReducer {
         },
     )
 
+    private fun processArtifactCreatedMessage(
+        sessions: SessionsState,
+        msg: ServerMessage.ArtifactCreated,
+    ): Pair<SessionsState, List<Effect>> {
+        val now = msg.sequence
+        val entry = TuiEventEntry(
+            timestamp = formatTime(now),
+            type = "ArtifactCreated",
+            detail = msg.artifactId.value,
+        )
+        return sessions.copy(
+            sessions = sessions.sessions.map { s ->
+                if (s.id == msg.sessionId.value) {
+                    s.copy(
+                        recentEvents = (s.recentEvents + entry).takeLast(7),
+                        lastEventAt = now,
+                    )
+                } else {
+                    s
+                }
+            },
+        ) to emptyList()
+    }
+
     private fun processWorkflowListMessage(
         sessions: SessionsState,
         msg: ServerMessage.WorkflowList,
diff --git a/apps/tui/src/main/kotlin/com/correx/apps/tui/state/TuiState.kt b/apps/tui/src/main/kotlin/com/correx/apps/tui/state/TuiState.kt
index b6070356..dea9bcde 100644
--- a/apps/tui/src/main/kotlin/com/correx/apps/tui/state/TuiState.kt
+++ b/apps/tui/src/main/kotlin/com/correx/apps/tui/state/TuiState.kt
@@ -47,6 +47,7 @@ data class TuiState(
     val providerType: ProviderType = ProviderType.LOCAL,
     val routerConnected: Boolean = false,
     val routerMessages: Map<String, List<String>> = emptyMap(),
+    val diffExpanded: Boolean = false,
     val chatMode: ChatMode = ChatMode.CHAT,
     /**
      * True from connect until SnapshotComplete observed. Reset to true on Disconnected.