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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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"""Base class for agent loaders."""

from __future__ import annotations

from abc import ABC
from abc import abstractmethod
from typing import Union

from ...agents.base_agent import BaseAgent
from ...apps.app import App


class BaseAgentLoader(ABC):
  """Abstract base class for agent loaders."""

  @abstractmethod
  def load_agent(self, agent_name: str) -> Union[BaseAgent, App]:
    """Loads an instance of an agent with the given name."""

  @abstractmethod
  def list_agents(self) -> list[str]:
    """Lists all agents available in the agent loader in alphabetical order."""
