chore: revert all changes to outdated files

Author: yeesian

src/google/adk/cli/utils/_telemetry.py

@@ -39,16 +39,6 @@
 
 logger = logging.getLogger("google_adk." + __name__)
 
-
-def is_single_agent_directory(path: Path | str) -> bool:
-  """Returns True if the directory contains a single agent configuration or file."""
-  p = Path(path).resolve()
-  return (
-      p.joinpath("agent.py").is_file()
-      or p.joinpath("root_agent.yaml").is_file()
-  )
-
-
 # Special agents directory for agents with names starting with double underscore
 SPECIAL_AGENTS_DIR = os.path.join(
     os.path.dirname(__file__), "..", "built_in_agents"
@@ -70,36 +60,10 @@ class AgentLoader(BaseAgentLoader):
   """
 
   def __init__(self, agents_dir: str):
-    agents_path = Path(agents_dir).resolve()
-    is_single_agent = is_single_agent_directory(agents_path)
-    if is_single_agent:
-      self._is_single_agent = True
-      self._single_agent_name = agents_path.name
-      self.agents_dir = str(agents_path.parent)
-    else:
-      self._is_single_agent = False
-      self._single_agent_name = None
-      self.agents_dir = str(agents_path)
-
+    self.agents_dir = str(Path(agents_dir))
     self._original_sys_path = None
     self._agent_cache: dict[str, Union[BaseAgent, App]] = {}
 
-  @property
-  def is_single_agent(self) -> bool:
-    """Returns True if the loader is in single agent mode."""
-    return self._is_single_agent
-
-  @property
-  def single_agent_name(self) -> Optional[str]:
-    """Returns the name of the agent in single agent mode."""
-    return self._single_agent_name
-
-  def _set_single_agent_mode(self, name: str, agents_dir: str) -> None:
-    """Internal method to force single agent mode. Use with care."""
-    self._is_single_agent = True
-    self._single_agent_name = name
-    self.agents_dir = agents_dir
-
   def _load_from_module_or_package(
       self, agent_name: str
   ) -> Optional[Union[BaseAgent, App]]:
@@ -240,13 +204,6 @@ def _validate_agent_name(self, agent_name: str) -> None:
       name_to_check = agent_name
       check_dir = self.agents_dir
 
-    if self._is_single_agent and not agent_name.startswith("__"):
-      if agent_name != self._single_agent_name:
-        raise ValueError(
-            f"Agent not found: {agent_name!r}. In single agent mode, only "
-            f"'{self._single_agent_name}' is accessible."
-        )
-
     if not self._VALID_AGENT_NAME_RE.match(name_to_check):
       raise ValueError(
           f"Invalid agent name: {agent_name!r}. Agent names must be valid"
@@ -411,8 +368,6 @@ def load_agent(self, agent_name: str) -> Union[BaseAgent, App]:
   @override
   def list_agents(self) -> list[str]:
     """Lists all agents available in the agent loader (sorted alphabetically)."""
-    if self._is_single_agent:
-      return [self._single_agent_name]
     base_path = Path.cwd() / self.agents_dir
     agent_names = [
         x
@@ -484,4 +439,3 @@ def remove_agent_from_cache(self, agent_name: str):
       logger.debug("Deleting module %s", key)
       del sys.modules[key]
     self._agent_cache.pop(agent_name, None)
-