diff --git a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts
index 36fbb3e26d7..62058c203e3 100644
--- a/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts
+++ b/src/renderer/src/runtime/sync-runtime-graph/mobile-session-inputs.ts
@@ -24,6 +24,7 @@ import type {
 import {
   captureMountedTerminalSurfaces,
   narrowedEntriesEqual,
+  narrowMapByKeys,
   narrowRecordByKeys
 } from './mobile-session-capture'
 import {
@@ -208,24 +209,6 @@ export function buildMobileSessionWorktreeInputs(
   }
 }
 
-function narrowMapByKeys<T>(
-  source: ReadonlyMap<string, T>,
-  keys: readonly string[]
-): ReadonlyMap<string, T> {
-  if (source.size === 0 || keys.length === 0) {
-    return EMPTY_NARROWED_BY_KEY
-  }
-  let narrowed: Map<string, T> | null = null
-  for (const key of keys) {
-    if (!source.has(key)) {
-      continue
-    }
-    narrowed ??= new Map<string, T>()
-    narrowed.set(key, source.get(key) as T)
-  }
-  return narrowed ?? EMPTY_NARROWED_BY_KEY
-}
-
 export function buildMobileLaunchDraftsByPaneKey(args: {
   terminalTabs: AppState['tabsByWorktree'][string]
   terminalLayoutByTabId: MobileSessionWorktreeInputs['terminalLayoutByTabId']