fix(cli): handle agent engine deploy imports

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [Unreleased]
+
+### Bug Fixes
+* Sanitize Agent Engine temp folder names to avoid invalid module imports.
+* Fix Agent Engine template imports for agents in an app/ subdirectory.
+
 ## [1.23.0](https://github.com/google/adk-python/compare/v1.22.1...v1.23.0) (2026-01-22)
 
 ### ⚠ BREAKING CHANGES
@@ -82,8 +88,6 @@
 * Upgrade the sample BigQuery agent model version to `gemini-2.5-flash` ([fd2c0f5](https://github.com/google/adk-python/commit/fd2c0f556b786417a9f6add744827b07e7a06b7d))
 * Import `migration_runner` lazily within the migrate command ([905604f](https://github.com/google/adk-python/commit/905604faac82aca8ae0935eebea288f82985e9c5))
 
-
-
 ## [1.22.1](https://github.com/google/adk-python/compare/v1.22.0...v1.22.1) (2026-01-09)
 
 ### Bug Fixes

src/google/adk/cli/cli_deploy.py

@@ -33,6 +33,17 @@
 )
 
 
+def _sanitize_temp_folder_name(folder_name: str) -> str:
+  if not folder_name:
+    return folder_name
+  sanitized = ''.join(
+      char if char.isalnum() or char == '_' else '_' for char in folder_name
+  )
+  if sanitized and sanitized[0].isdigit():
+    return '_' + sanitized
+  return sanitized
+
+
 def _ensure_agent_engine_dependency(requirements_txt_path: str) -> None:
   """Ensures staged requirements include Agent Engine dependencies."""
   if not os.path.exists(requirements_txt_path):
@@ -108,7 +119,7 @@ def _ensure_agent_engine_dependency(requirements_txt_path: str) -> None:
   config_path = os.path.join(os.path.dirname(__file__), "root_agent.yaml")
   root_agent = config_agent_utils.from_config(config_path)
 else:
-  from .agent import {adk_app_object}
+  from {adk_app_import_module} import {adk_app_object}
 
 if {express_mode}: # Whether or not to use Express Mode
   vertexai.init(api_key=os.environ.get("GOOGLE_API_KEY"))
@@ -790,7 +801,8 @@ def to_agent_engine(
     os.chdir(parent_folder)
     did_change_cwd = True
   tmp_app_name = app_name + '_tmp' + datetime.now().strftime('%Y%m%d_%H%M%S')
-  temp_folder = temp_folder or tmp_app_name
+  raw_temp_folder = temp_folder or tmp_app_name
+  temp_folder = _sanitize_temp_folder_name(raw_temp_folder)
   agent_src_path = os.path.join(parent_folder, temp_folder)
   click.echo(f'Staging all files in: {agent_src_path}')
   # remove agent_src_path if it exists
@@ -954,6 +966,17 @@ def to_agent_engine(
       is_config_agent = True
 
     adk_app_file = os.path.join(temp_folder, f'{adk_app}.py')
+    app_subdir_agent = os.path.join(agent_src_path, 'app', 'agent.py')
+    app_subdir_init = os.path.join(agent_src_path, 'app', '__init__.py')
+    root_agent_file = os.path.join(agent_src_path, 'agent.py')
+    if (
+        os.path.exists(app_subdir_agent)
+        and os.path.exists(app_subdir_init)
+        and not os.path.exists(root_agent_file)
+    ):
+      adk_app_import_module = '.app.agent'
+    else:
+      adk_app_import_module = '.agent'
     if adk_app_object == 'root_agent':
       adk_app_type = 'agent'
     elif adk_app_object == 'app':
@@ -973,6 +996,7 @@ def to_agent_engine(
               agent_folder=f'./{temp_folder}',
               adk_app_object=adk_app_object,
               adk_app_type=adk_app_type,
+              adk_app_import_module=adk_app_import_module,
               express_mode=api_key is not None,
           )
       )