test(renderer): align regressions with durable nested ownership

Update CI-failing expectations for #13341 (process/title no longer reclaim
under active launch), add shell/remote/hook edge cases, and use an
agent-attributable working title in WorktreeCard status coverage.

src/renderer/src/components/sidebar/WorktreeCard.test.ts

@@ -52,8 +52,9 @@ describe('getWorktreeStatus', () => {
         livePtyIds
       )
     ).toBe('permission')
+    // Why: status must be agent-attributable (identity or spinner+launch), not a bare keyword.
     expect(
-      getWorktreeStatus([makeTerminalTab('mimo working')], [{ id: 'browser-1' }], livePtyIds)
+      getWorktreeStatus([makeTerminalTab('✦ Codex')], [{ id: 'browser-1' }], livePtyIds)
     ).toBe('working')
   })
 })

src/renderer/src/components/sidebar/useWorktreeAgentRows.test.ts

@@ -140,7 +140,8 @@ describe('buildWorktreeAgentRows', () => {
     expect(rows[0].agentType).toBe('codex')
   })
 
-  it('prefers an unrelated live title over the launched tab agent for unknown rows', () => {
+  // Why (#13341): unknown hook rows still honor launch ownership over a nested child title.
+  it('keeps launch ownership over an unrelated live title for unknown rows', () => {
     const rows = buildWorktreeAgentRows({
       tabs: [makeTab('tab-1', { launchAgent: 'omp', title: '\u280b Codex' })],
       entries: [
@@ -153,7 +154,7 @@ describe('buildWorktreeAgentRows', () => {
       now: 2000
     })
 
-    expect(rows[0].agentType).toBe('codex')
+    expect(rows[0].agentType).toBe('omp')
   })
 
   it('normalizes live Pi-compatible rows from the launched OMP tab agent', () => {

src/renderer/src/components/sidebar/worktree-title-derived-agent-rows.ts

@@ -203,22 +203,17 @@ export function resolveTitleDerivedAgentType(
   const agentType = TITLE_AGENT_LABEL_TO_TYPE[label] ?? 'unknown'
   const owner = ownerAgentType && ownerAgentType !== 'unknown' ? ownerAgentType : null
   if (agentType === 'claude') {
-    // Why: Claude's task-title spinner heuristic has no provider identity. In
-    // split panes it can match arbitrary terminal spinners, so sidebar rows only
-    // accept Claude when the title itself names Claude.
+    // Why: spinner heuristic is provider-neutral — require a Claude token.
     if (!CLAUDE_AGENT_TOKEN_RE.test(title)) {
       return null
     }
-    // Why (#8940 + #13341): Claude mentions never steal ownership, and a nested
-    // Claude identity frame under a durable non-Claude owner keeps the parent.
-    // Pane reuse is modeled by clearing launchAgent first (tab-agent path).
+    // Why (#8940/#13341): never steal a non-Claude owner; reclaim after launch clears.
     if (owner && owner !== 'claude') {
       return null
     }
     return agentType
   }
-  // Why (#13341): nested Codex/Gemini/... titles must not rebrand a pane whose
-  // launch owner is still a different agent — fall through to ownerAgentType.
+  // Why (#13341): nested child titles keep the durable owner until launch clears.
   if (owner && agentType !== 'unknown' && agentType !== owner) {
     return null
   }

src/renderer/src/lib/use-tab-agent-nested-identity.test.ts

@@ -102,4 +102,57 @@ describe('resolveTabAgentFromSignals — nested child identity (#13341)', () =>
       })
     ).toBe('codex')
   })
+
+  it('treats shell-foreground as exit so a later process can own the icon', () => {
+    expect(
+      resolveTabAgentFromSignals({
+        hasObservedAgentSignal: true,
+        isRemote: false,
+        title: '✳ Claude Code',
+        hookAgent: null,
+        processAgent: null,
+        processShellForeground: true,
+        launchAgent: 'claude'
+      })
+    ).toBeNull()
+    expect(
+      resolveTabAgentFromSignals({
+        hasObservedAgentSignal: true,
+        isRemote: false,
+        title: '✦ Codex',
+        hookAgent: null,
+        processAgent: 'codex',
+        processShellForeground: false,
+        launchAgent: undefined
+      })
+    ).toBe('codex')
+  })
+
+  it('keeps remote parent ownership when only a nested child title is visible', () => {
+    // Remote panes lack local process evidence; nested title alone must not rebrand.
+    expect(
+      resolveTabAgentFromSignals({
+        hasObservedAgentSignal: true,
+        isRemote: true,
+        title: '✦ Codex',
+        hookAgent: null,
+        processAgent: null,
+        launchAgent: 'claude'
+      })
+    ).toBe('claude')
+  })
+
+  it('lets a live different-group hook outrank launch (explicit takeover)', () => {
+    // Why: hooks are ground truth; fenced nested hooks keep parent agentType upstream.
+    expect(
+      resolveTabAgentFromSignals({
+        hasObservedAgentSignal: true,
+        isRemote: false,
+        title: '✦ Codex',
+        hookAgent: 'codex',
+        processAgent: 'codex',
+        launchAgent: 'claude'
+      })
+    ).toBe('codex')
+  })
 })

src/renderer/src/lib/use-tab-agent-opencode-native-title.test.ts

@@ -241,6 +241,7 @@ describe('OpenCode native title tab identity', () => {
         launchAgent: 'claude'
       })
     ).toBe('claude')
+    // Why (#13341): nested process under active launch is not stronger than parent ownership.
     expect(
       resolveTabAgentFromSignals({
         hasObservedAgentSignal: false,
@@ -251,7 +252,7 @@ describe('OpenCode native title tab identity', () => {
         sleepingSessionAgent: 'claude',
         launchAgent: 'claude'
       })
-    ).toBe('codex')
+    ).toBe('claude')
 
     for (const title of [
       'OpenCode ready',

src/renderer/src/lib/use-tab-agent-retained-identity.test.ts

@@ -126,7 +126,8 @@ describe('useTabAgent retained completion identity', () => {
     expect(latestAgent).toBe('gemini')
   })
 
-  it('lets an explicit cross-agent title reclaim a retained idle pane', async () => {
+  // Why (#13341): active launch ownership is durable; nested Claude title does not reclaim.
+  it('keeps launch ownership over an explicit cross-agent title on a retained idle pane', async () => {
     const paneKey = makePaneKey(TAB_ID, FOCUSED_LEAF_ID)
     useAppStore.setState({
       retainedAgentsByPaneKey: { [paneKey]: retainedEntry(paneKey, 'codex') }
@@ -134,7 +135,7 @@ describe('useTabAgent retained completion identity', () => {
 
     await renderProbe({ ...baseTab, launchAgent: 'codex', title: '✳ Claude Code' })
 
-    expect(latestAgent).toBe('claude')
+    expect(latestAgent).toBe('codex')
   })
 
   it('keeps focused launch metadata ahead of sibling retained identity', async () => {