diff --git a/src/main/services/team/TeamLaunchSummaryProjection.ts b/src/main/services/team/TeamLaunchSummaryProjection.ts
index 200e75be..2ee602dc 100644
--- a/src/main/services/team/TeamLaunchSummaryProjection.ts
+++ b/src/main/services/team/TeamLaunchSummaryProjection.ts
@@ -30,6 +30,10 @@ export interface PersistedTeamLaunchSummaryProjection extends LaunchStateSummary
   mixedAware?: true;
 }
 
+function getPersistedLaunchMemberNames(snapshot: PersistedTeamLaunchSnapshot): string[] {
+  return Array.from(new Set([...snapshot.expectedMembers, ...Object.keys(snapshot.members)]));
+}
+
 function normalizeIsoDate(value: unknown): string | null {
   if (typeof value !== 'string') {
     return null;
@@ -48,7 +52,8 @@ function toMillis(value: string | undefined | null): number {
 export function createLaunchStateSummary(
   snapshot: PersistedTeamLaunchSnapshot
 ): LaunchStateSummary {
-  const missingMembers = snapshot.expectedMembers.filter((name) => {
+  const persistedMemberNames = getPersistedLaunchMemberNames(snapshot);
+  const missingMembers = persistedMemberNames.filter((name) => {
     const member = snapshot.members[name];
     return member?.launchState === 'failed_to_start';
   });
@@ -57,8 +62,8 @@ export function createLaunchStateSummary(
     ...(snapshot.teamLaunchState === 'partial_failure'
       ? { partialLaunchFailure: true as const }
       : {}),
-    ...(snapshot.expectedMembers.length > 0
-      ? { expectedMemberCount: snapshot.expectedMembers.length }
+    ...(persistedMemberNames.length > 0
+      ? { expectedMemberCount: persistedMemberNames.length }
       : {}),
     ...(snapshot.summary.confirmedCount > 0
       ? { confirmedMemberCount: snapshot.summary.confirmedCount }
diff --git a/test/main/services/team/TeamLaunchSummaryProjection.test.ts b/test/main/services/team/TeamLaunchSummaryProjection.test.ts
index 6a69c1d4..abbdc3fe 100644
--- a/test/main/services/team/TeamLaunchSummaryProjection.test.ts
+++ b/test/main/services/team/TeamLaunchSummaryProjection.test.ts
@@ -174,4 +174,52 @@ describe('TeamLaunchSummaryProjection', () => {
       })
     ).toBe(false);
   });
+
+  it('uses the union of expectedMembers and persisted members for summary projection', () => {
+    const summary = createPersistedLaunchSummaryProjection({
+      version: 2,
+      teamName: 'mixed-team',
+      updatedAt: '2026-04-22T12:00:00.000Z',
+      launchPhase: 'finished',
+      expectedMembers: ['alice'],
+      members: {
+        alice: {
+          name: 'alice',
+          providerId: 'codex',
+          launchState: 'confirmed_alive',
+          agentToolAccepted: true,
+          runtimeAlive: true,
+          bootstrapConfirmed: true,
+          hardFailure: false,
+          lastEvaluatedAt: '2026-04-22T12:00:00.000Z',
+        },
+        bob: {
+          name: 'bob',
+          providerId: 'opencode',
+          launchState: 'failed_to_start',
+          agentToolAccepted: true,
+          runtimeAlive: false,
+          bootstrapConfirmed: false,
+          hardFailure: true,
+          hardFailureReason: 'Side lane failed',
+          lastEvaluatedAt: '2026-04-22T12:00:00.000Z',
+        },
+      },
+      summary: {
+        confirmedCount: 1,
+        pendingCount: 0,
+        failedCount: 1,
+        runtimeAlivePendingCount: 0,
+      },
+      teamLaunchState: 'partial_failure',
+    } as never);
+
+    expect(summary).toMatchObject({
+      expectedMemberCount: 2,
+      confirmedMemberCount: 1,
+      missingMembers: ['bob'],
+      failedCount: 1,
+      teamLaunchState: 'partial_failure',
+    });
+  });
 });