diff --git a/crates/shell/src/app_storage/lifecycle.rs b/crates/shell/src/app_storage/lifecycle.rs
index d7c8c06e..2c5db2e5 100644
--- a/crates/shell/src/app_storage/lifecycle.rs
+++ b/crates/shell/src/app_storage/lifecycle.rs
@@ -62,12 +62,12 @@ pub fn register_native_specs(storage: &Storage) {
 }
 
 /// A script app's `manifest.json` under App Hub's data root: an installed
-/// app's `<root>/<id>/bundle/`, or the newest unpacked build of a system app
+/// app's bundle ([`crate::apps::installed_bundle`]), or the newest unpacked build of a system app
 /// (`<root>/.system/<id>/<build>/`). `None` before either exists (a system
 /// app the Card runner has not unpacked yet).
 pub fn script_manifest(root: &Path, manifest_id: &str) -> Option<Value> {
     super::validate_app_id(manifest_id).ok()?;
-    let installed = root.join(manifest_id).join("bundle").join("manifest.json");
+    let installed = crate::apps::installed_bundle(root, manifest_id).join("manifest.json");
     let path = if installed.is_file() {
         installed
     } else {
diff --git a/crates/shell/src/apps.rs b/crates/shell/src/apps.rs
index 21957c97..ba597546 100644
--- a/crates/shell/src/apps.rs
+++ b/crates/shell/src/apps.rs
@@ -24,7 +24,7 @@
 
 use makepad_app_module::AppModule;
 use std::collections::HashMap;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Hosting {
@@ -317,7 +317,7 @@ fn read_script_agent_apps(root: &Path) -> Vec<AgentApp> {
         }
     }
     for app in octosense_app_hub_app::installed_apps(&root) {
-        if let Some(a) = script_agent_app(&root.join(&app.id).join("bundle").join("manifest.json"), &app.id, &app.name) {
+        if let Some(a) = script_agent_app(&installed_bundle(&root, &app.id).join("manifest.json"), &app.id, &app.name) {
             out.push(a);
         }
     }
@@ -661,6 +661,20 @@ impl AppRegistry {
     }
 }
 
+/// An installed store app's bundle under App Hub's apps root. App Hub keeps
+/// it outside the app's storage, in `<root>/.bundles/<id>/bundle`
+/// (`octosense_app_hub::installed_bundle_dir`); a device whose App Hub has
+/// not moved it yet still has it in `<root>/<id>/bundle`. The new place
+/// wins when both exist.
+pub(crate) fn installed_bundle(root: &Path, app_id: &str) -> PathBuf {
+    let current = root.join(".bundles").join(app_id).join("bundle");
+    if current.is_dir() {
+        current
+    } else {
+        root.join(app_id).join("bundle")
+    }
+}
+
 #[cfg(test)]
 mod tests {
     /// The assistant pane's own process is a registry row (F10 starts it
@@ -674,6 +688,23 @@ mod tests {
         assert!(crate::shell::launcher::apps().iter().all(|a| a.id != "apps.aichat" && a.id != "aichat"));
     }
 
+    /// App Hub keeps an installed bundle in `<root>/.bundles/<id>/bundle`
+    /// (outside the app's storage); a device App Hub has not updated yet
+    /// still has it in `<root>/<id>/bundle`. Either is found, the new one
+    /// first.
+    #[test]
+    fn an_installed_bundle_is_found_in_either_layout() {
+        let root = std::env::temp_dir().join(format!("shell-installed-bundle-{}", std::process::id()));
+        let _ = std::fs::remove_dir_all(&root);
+        let legacy = root.join("dev.example.app/bundle");
+        std::fs::create_dir_all(&legacy).unwrap();
+        assert_eq!(installed_bundle(&root, "dev.example.app"), legacy);
+        let current = root.join(".bundles/dev.example.app/bundle");
+        std::fs::create_dir_all(&current).unwrap();
+        assert_eq!(installed_bundle(&root, "dev.example.app"), current, "the new layout wins");
+        assert_eq!(installed_bundle(&root, "dev.example.none"), root.join("dev.example.none/bundle"));
+        let _ = std::fs::remove_dir_all(&root);
+    }
     use super::*;
 
     /// ADR 0004 §3: no script app takes a native app's id or namespace.
diff --git a/crates/shell/src/host_tools/script_apps.rs b/crates/shell/src/host_tools/script_apps.rs
index 61c293cc..56558760 100644
--- a/crates/shell/src/host_tools/script_apps.rs
+++ b/crates/shell/src/host_tools/script_apps.rs
@@ -149,7 +149,7 @@ fn admitted_bundle(app: &str) -> Result<(PathBuf, PathBuf), String> {
     let root = octosense_appstore::data_root_if_set().ok_or("App Hub has no apps root yet")?;
     let bundle = match octosense_appstore::system::system_app(app) {
         Some(system) => octosense_appstore::system::prepare(&root, &system)?.0,
-        None => root.join(app).join("bundle"),
+        None => crate::apps::installed_bundle(&root, app),
     };
     Ok((root, bundle))
 }