diff --git a/apps/desktop-shell/scripts/check-config.mjs b/apps/desktop-shell/scripts/check-config.mjs
index 2a36d2ed5..56a467e7e 100644
--- a/apps/desktop-shell/scripts/check-config.mjs
+++ b/apps/desktop-shell/scripts/check-config.mjs
@@ -2233,6 +2233,9 @@ const requiredRustHostSnippets = [
   'PermissionState::Prompt | PermissionState::PromptWithRationale',
   '"notification permission denied"',
   '"copied_to_clipboard"',
+  'file_export_cancelled_response',
+  'file_import_cancelled_response',
+  'desktop_file_cancelled_responses_are_stable',
   '"file export cancelled"',
   '"file import cancelled"',
   'BASE64_STANDARD.decode',
diff --git a/apps/desktop-shell/src-tauri/src/host_bridge/files.rs b/apps/desktop-shell/src-tauri/src/host_bridge/files.rs
index 9e927ad00..02c2b5785 100644
--- a/apps/desktop-shell/src-tauri/src/host_bridge/files.rs
+++ b/apps/desktop-shell/src-tauri/src/host_bridge/files.rs
@@ -7,6 +7,14 @@ use crate::host_bridge::protocol::{failed, ok, HostBridgeRequest, HostBridgeResp
 use serde_json::json;
 use tauri_plugin_dialog::DialogExt;
 
+fn file_export_cancelled_response(request: &HostBridgeRequest) -> HostBridgeResponse {
+    failed(request.id.clone(), "cancelled", "file export cancelled")
+}
+
+fn file_import_cancelled_response(request: &HostBridgeRequest) -> HostBridgeResponse {
+    failed(request.id.clone(), "cancelled", "file import cancelled")
+}
+
 pub(crate) async fn export_desktop_host_bridge_text_file(
     app: &tauri::AppHandle,
     request: &HostBridgeRequest,
@@ -22,7 +30,7 @@ pub(crate) async fn export_desktop_host_bridge_text_file(
         .set_file_name(file_name.clone())
         .blocking_save_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file export cancelled");
+        return file_export_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -56,7 +64,7 @@ pub(crate) async fn import_desktop_host_bridge_text_file(
         .add_filter("Text", &["txt", "md", "markdown", "csv", "json"])
         .blocking_pick_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file import cancelled");
+        return file_import_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -84,7 +92,7 @@ pub(crate) async fn import_desktop_host_bridge_document_file(
         )
         .blocking_pick_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file import cancelled");
+        return file_import_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -114,7 +122,7 @@ pub(crate) async fn export_desktop_host_bridge_image_file(
         .set_file_name(file_name.clone())
         .blocking_save_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file export cancelled");
+        return file_export_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -147,7 +155,7 @@ pub(crate) async fn import_desktop_host_bridge_image_file(
         .add_filter("Image", &["png", "jpg", "jpeg", "webp"])
         .blocking_pick_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file import cancelled");
+        return file_import_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -174,7 +182,7 @@ pub(crate) async fn import_desktop_host_bridge_audio_file(
         .add_filter("Audio", &["mp3", "m4a", "mp4", "wav", "ogg", "webm"])
         .blocking_pick_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file import cancelled");
+        return file_import_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -204,7 +212,7 @@ pub(crate) async fn export_desktop_host_bridge_audio_file(
         .set_file_name(file_name.clone())
         .blocking_save_file();
     let Some(file_path) = file_path else {
-        return failed(request.id.clone(), "cancelled", "file export cancelled");
+        return file_export_cancelled_response(request);
     };
     let path = match file_path.into_path() {
         Ok(path) => path,
@@ -226,3 +234,26 @@ pub(crate) async fn export_desktop_host_bridge_audio_file(
         }),
     )
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::host_bridge::protocol::request;
+
+    #[test]
+    fn desktop_file_cancelled_responses_are_stable() {
+        let request = request("file.importText");
+
+        let export_error = file_export_cancelled_response(&request)
+            .error
+            .expect("export error");
+        assert_eq!(export_error.code, "cancelled");
+        assert_eq!(export_error.message, "file export cancelled");
+
+        let import_error = file_import_cancelled_response(&request)
+            .error
+            .expect("import error");
+        assert_eq!(import_error.code, "cancelled");
+        assert_eq!(import_error.message, "file import cancelled");
+    }
+}