diff --git a/src/shared/agent-title-owner.ts b/src/shared/agent-title-owner.ts
index dfa966669ea..2526c94572f 100644
--- a/src/shared/agent-title-owner.ts
+++ b/src/shared/agent-title-owner.ts
@@ -18,6 +18,11 @@ type TitleProfileMatch = {
 
 type TitleLabelProfileMatch = Pick<TitleProfileMatch, 'profile'>
 
+export type CompatibleAgentOwnerOptions = {
+  /** Whether the owner comes from explicit launch intent. */
+  ownerIsLaunch?: boolean
+}
+
 const COMPATIBLE_IDLE_TITLE_RE = /(?<![\w./\\-])(?:ready|idle|done)(?![\w-])/i
 
 /**
@@ -114,7 +119,8 @@ function hasIdleSuffix(title: string, sourceProfile: SyntheticAgentTitleProfile)
  */
 export function resolveCompatibleAgentTypeForOwner(
   incomingAgentType: AgentType | null | undefined,
-  ownerAgentType: AgentType | null | undefined
+  ownerAgentType: AgentType | null | undefined,
+  _options?: CompatibleAgentOwnerOptions
 ): AgentType | undefined {
   if (!incomingAgentType) {
     return undefined
@@ -137,7 +143,8 @@ export function resolveCompatibleAgentTypeForOwner(
  */
 export function normalizeCompatibleAgentTitleForOwner(
   title: string,
-  ownerAgentType: AgentType | null | undefined
+  ownerAgentType: AgentType | null | undefined,
+  _options?: CompatibleAgentOwnerOptions
 ): string {
   const ownerProfile = getSyntheticAgentTitleProfile(ownerAgentType)
   if (!ownerProfile?.titleIdentityGroup) {
@@ -188,11 +195,16 @@ export function normalizeCompatibleAgentTitleForOwner(
  */
 export function normalizeCompatibleAgentStatusEntryForOwner(
   entry: AgentStatusEntry,
-  ownerAgentType: AgentType | null | undefined
+  ownerAgentType: AgentType | null | undefined,
+  options?: CompatibleAgentOwnerOptions
 ): AgentStatusEntry {
-  const agentType = resolveCompatibleAgentTypeForOwner(entry.agentType, ownerAgentType)
+  const agentType = resolveCompatibleAgentTypeForOwner(entry.agentType, ownerAgentType, options)
   const terminalTitle = entry.terminalTitle
-    ? normalizeCompatibleAgentTitleForOwner(entry.terminalTitle, agentType ?? ownerAgentType)
+    ? normalizeCompatibleAgentTitleForOwner(
+        entry.terminalTitle,
+        agentType ?? ownerAgentType,
+        options
+      )
     : entry.terminalTitle
   if (agentType === entry.agentType && terminalTitle === entry.terminalTitle) {
     return entry
@@ -203,3 +215,19 @@ export function normalizeCompatibleAgentStatusEntryForOwner(
     ...(terminalTitle ? { terminalTitle } : {})
   }
 }
+
+/** Returns whether two agents share the same title identity group. */
+export function shareCompatibleTitleIdentityGroup(
+  left: AgentType | null | undefined,
+  right: AgentType | null | undefined
+): boolean {
+  if (!left || !right) {
+    return false
+  }
+  if (left === right) {
+    return true
+  }
+  const leftGroup = getSyntheticAgentTitleProfile(left)?.titleIdentityGroup
+  const rightGroup = getSyntheticAgentTitleProfile(right)?.titleIdentityGroup
+  return Boolean(leftGroup && leftGroup === rightGroup)
+}