diff --git a/src/components/turn.tsx b/src/components/turn.tsx
index d9742c7..5e0541b 100644
--- a/src/components/turn.tsx
+++ b/src/components/turn.tsx
@@ -1,6 +1,7 @@
 import {
   ArrowDownToLine,
   ArrowUpToLine,
+  CircleAlert,
   Clock,
   CornerDownRight,
   MessageSquare,
@@ -72,6 +73,19 @@ function StepEntries({ step }: { step: Step }) {
   );
 }
 
+function TurnError({ error }: { error: NonNullable<TurnData["error"]> }) {
+  return (
+    <Entry icon={<CircleAlert class="text-red-400" />}>
+      <div class="flex min-w-0 flex-col gap-0.5">
+        <p class="text-xs text-red-400">{error.message}</p>
+        <span class="font-mono text-[10px] text-foreground/30">
+          {error.code}
+        </span>
+      </div>
+    </Entry>
+  );
+}
+
 export function Turn({ turn, index }: { turn: TurnData; index: number }) {
   return (
     <section>
@@ -85,6 +99,7 @@ export function Turn({ turn, index }: { turn: TurnData; index: number }) {
         {turn.steps.map((step) => (
           <StepEntries key={step.index} step={step} />
         ))}
+        {turn.error !== undefined && <TurnError error={turn.error} />}
       </div>
     </section>
   );
diff --git a/src/trace/events.ts b/src/trace/events.ts
index 71a326f..8444c5d 100644
--- a/src/trace/events.ts
+++ b/src/trace/events.ts
@@ -1,4 +1,4 @@
-import type { Usage } from "@/trace/types";
+import type { TraceError, Usage } from "@/trace/types";
 
 // Structural types for the eve stream events the devtools consume, declared
 // locally so the package does not depend on eve itself and tolerates fields
@@ -19,7 +19,7 @@ export type ActionRequest = {
 type TraceEventBody =
   | { type: "turn.started"; data: { turnId: string } }
   | { type: "turn.completed"; data: { turnId: string } }
-  | { type: "turn.failed"; data: { turnId: string } }
+  | { type: "turn.failed"; data: { turnId: string } & TraceError }
   | { type: "message.received"; data: { turnId: string; message: string } }
   | { type: "step.started"; data: { turnId: string; stepIndex: number } }
   | {
diff --git a/src/trace/projector.ts b/src/trace/projector.ts
index 8b6d240..90c8145 100644
--- a/src/trace/projector.ts
+++ b/src/trace/projector.ts
@@ -161,6 +161,11 @@ export function createProjector(onChange: (turns: Turn[]) => void): Projector {
         const turn = turnById(event.data.turnId);
         if (turn !== undefined) {
           turn.status = "failed";
+          turn.error = {
+            code: event.data.code,
+            message: event.data.message,
+            details: event.data.details,
+          };
           turn.durationMs = millisBetween(turn.startedAt, event.meta?.at);
         }
         abortRunningActions();
diff --git a/src/trace/types.ts b/src/trace/types.ts
index d9a6992..8de785e 100644
--- a/src/trace/types.ts
+++ b/src/trace/types.ts
@@ -13,6 +13,12 @@ export type Usage = {
   outputTokens?: number;
 };
 
+export type TraceError = {
+  code: string;
+  message: string;
+  details?: unknown;
+};
+
 export type Action = {
   callId: string;
   name: string;
@@ -34,6 +40,7 @@ export type Step = {
 export type Turn = {
   id: string;
   status: TurnStatus;
+  error?: TraceError;
   prompt?: string;
   startedAt?: string; // ISO timestamp, from the event's `meta.at`
   durationMs?: number;