diff --git a/packages/kap-server/src/services/transcript/coreEventMap.ts b/packages/kap-server/src/services/transcript/coreEventMap.ts
index abef7f3d8..a1643bb36 100644
--- a/packages/kap-server/src/services/transcript/coreEventMap.ts
+++ b/packages/kap-server/src/services/transcript/coreEventMap.ts
@@ -384,6 +384,7 @@ export class AgentTranscriptProjector {
     this.openText = undefined;
     this.openThinking = undefined;
     ops.push({ op: 'turn.upsert', turn: this.currentTurn });
+    ops.push({ op: 'meta.merge', meta: { activity: 'turn' } });
     return ops;
   }
 
@@ -421,6 +422,7 @@ export class AgentTranscriptProjector {
       usage: this.takeTurnUsage(turnId),
     };
     ops.push({ op: 'turn.upsert', turn: this.currentTurn });
+    ops.push({ op: 'meta.merge', meta: { activity: 'idle' } });
     this.currentStep = undefined;
     this.pendingTaskNotifications = [];
     if (event.reason === 'cancelled' && event.interruptReason === 'user_cancelled') {
diff --git a/packages/kap-server/src/services/transcript/transcriptService.ts b/packages/kap-server/src/services/transcript/transcriptService.ts
index 1c07a0729..98c3ed47b 100644
--- a/packages/kap-server/src/services/transcript/transcriptService.ts
+++ b/packages/kap-server/src/services/transcript/transcriptService.ts
@@ -524,7 +524,13 @@ export class TranscriptService {
       messages,
       sawTurnPrompt ? { taskOriginTurnTaskIds } : undefined,
     );
-    return foldWireRecordFacts(records, base);
+    const lastTurn = base.items.findLast((item) => item.kind === 'turn');
+    const activity =
+      lastTurn?.kind === 'turn' && lastTurn.state === 'running' ? 'unknown' : 'idle';
+    return foldWireRecordFacts(records, {
+      ...base,
+      meta: { ...base.meta, activity },
+    });
   }
 
   /** Dispose the live store + binding for a session (session closed / server shutdown). */
diff --git a/packages/kap-server/test/services/transcript.test.ts b/packages/kap-server/test/services/transcript.test.ts
index 89dec55e8..592615193 100644
--- a/packages/kap-server/test/services/transcript.test.ts
+++ b/packages/kap-server/test/services/transcript.test.ts
@@ -1984,11 +1984,26 @@ describe('AgentTranscriptProjector', () => {
     expect(turnOps('t0', tx.getItems()).state).toBe('failed');
   });
 
-  it('maps cron / task origins onto the turn header', () => {
+  it('mirrors turn liveness into meta.activity', () => {
     const projector = new AgentTranscriptProjector('main');
     const tx = new AgentTranscript('main');
     const feed = (event: ProjectorBusEvent): void => void tx.apply(projector.map(event));
 
+    expect(tx.getMeta().activity).toBeUndefined();
+    feed(ev({ type: 'turn.started', turnId: 1, origin: { kind: 'user' } }));
+    expect(tx.getMeta().activity).toBe('turn');
+    feed(ev({ type: 'turn.ended', turnId: 1, reason: 'completed' }));
+    expect(tx.getMeta().activity).toBe('idle');
+    feed(ev({ type: 'turn.started', turnId: 2, origin: { kind: 'user' } }));
+    expect(tx.getMeta().activity).toBe('turn');
+    feed(ev({ type: 'turn.ended', turnId: 2, reason: 'failed' }));
+    expect(tx.getMeta().activity).toBe('idle');
+  });
+
+  it('maps cron / task origins onto the turn header', () => {    const projector = new AgentTranscriptProjector('main');
+    const tx = new AgentTranscript('main');
+    const feed = (event: ProjectorBusEvent): void => void tx.apply(projector.map(event));
+
     feed(
       ev({
         type: 'turn.started',