diff --git a/src/renderer/components/team/dialogs/TaskDetailDialog.tsx b/src/renderer/components/team/dialogs/TaskDetailDialog.tsx
index 3fb6b5dd..af0ad85d 100644
--- a/src/renderer/components/team/dialogs/TaskDetailDialog.tsx
+++ b/src/renderer/components/team/dialogs/TaskDetailDialog.tsx
@@ -1455,7 +1455,7 @@ export const TaskDetailDialog = ({
                       title="Implementation time from persisted work intervals"
                     >
                       <Clock size={10} />
-                      <span>Work time {taskImplementationDurationLabel}</span>
+                      <span>In progress time {taskImplementationDurationLabel}</span>
                     </span>
                   ) : undefined
                 }
diff --git a/test/main/services/team/TeamTaskWriter.test.ts b/test/main/services/team/TeamTaskWriter.test.ts
index 3ff59855..c830d84c 100644
--- a/test/main/services/team/TeamTaskWriter.test.ts
+++ b/test/main/services/team/TeamTaskWriter.test.ts
@@ -210,16 +210,29 @@ describe('TeamTaskWriter', () => {
       const writtenPath = '/mock/tasks/my-team/11.json';
       const persisted = JSON.parse(hoisted.files.get(writtenPath) ?? '{}');
       expect(persisted.historyEvents).toHaveLength(1);
-      expect(persisted.historyEvents[0]).toMatchObject({
-        type: 'task_created',
-        status: 'in_progress',
-        actor: 'bob',
-      });
+    expect(persisted.historyEvents[0]).toMatchObject({
+      type: 'task_created',
+      status: 'in_progress',
+      actor: 'bob',
+    });
+  });
+
+  it('createTask records in_progress workIntervals as status time, not runtime activity', async () => {
+    await writer.createTask('my-team', {
+      id: '14',
+      subject: 'Already assigned',
+      status: 'in_progress',
+      createdAt: '2026-05-14T10:00:00.000Z',
     });
 
-    it('createTask without createdBy omits actor', async () => {
-      await writer.createTask('my-team', {
-        id: '13',
+    const writtenPath = '/mock/tasks/my-team/14.json';
+    const persisted = JSON.parse(hoisted.files.get(writtenPath) ?? '{}');
+    expect(persisted.workIntervals).toEqual([{ startedAt: '2026-05-14T10:00:00.000Z' }]);
+  });
+
+  it('createTask without createdBy omits actor', async () => {
+    await writer.createTask('my-team', {
+      id: '13',
         subject: 'No author',
         status: 'pending',
       });
diff --git a/test/renderer/components/team/dialogs/TaskDetailDialog.test.ts b/test/renderer/components/team/dialogs/TaskDetailDialog.test.ts
index 5d2c084c..b50dad58 100644
--- a/test/renderer/components/team/dialogs/TaskDetailDialog.test.ts
+++ b/test/renderer/components/team/dialogs/TaskDetailDialog.test.ts
@@ -635,7 +635,7 @@ describe('TaskDetailDialog changes summary loading', () => {
     });
 
     expect(host.textContent).toContain('Workflow History');
-    expect(host.textContent).toContain('Work time 5m 00s');
+    expect(host.textContent).toContain('In progress time 5m 00s');
 
     const workflowButton = [...host.querySelectorAll('button')].find(
       (button) => button.textContent?.startsWith('Workflow History') === true