revert: keep hooks param as list, not Sequence

Per @mkmeral's feedback: keep hooks as list[...] for devx simplicity.
If users want explicit tuple/Sequence control, they can use add_hook().

Changes:
- Revert Sequence -> list in hooks type hint
- Revert docstring to not mention tuple support
- Remove Sequence import (no longer needed)
- Remove test_hooks_param_accepts_tuple test

Author: agent-of-mkmeral

src/strands/agent/agent.py

@@ -12,7 +12,7 @@
 import logging
 import threading
 import warnings
-from collections.abc import AsyncGenerator, AsyncIterator, Callable, Mapping, Sequence
+from collections.abc import AsyncGenerator, AsyncIterator, Callable, Mapping
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -132,7 +132,7 @@ def __init__(
         description: str | None = None,
         state: AgentState | dict | None = None,
         plugins: list[Plugin] | None = None,
-        hooks: Sequence[HookProvider | HookCallback] | None = None,
+        hooks: list[HookProvider | HookCallback] | None = None,
         session_manager: SessionManager | None = None,
         structured_output_prompt: str | None = None,
         tool_executor: ToolExecutor | None = None,
@@ -187,8 +187,7 @@ def __init__(
                 Plugins are initialized with the agent instance after construction and can register hooks,
                 modify agent attributes, or perform other setup tasks.
                 Defaults to None.
-            hooks: Hooks to be added to the agent hook registry. Accepts any sequence
-                (list, tuple) of HookProvider instances
+            hooks: Hooks to be added to the agent hook registry. Accepts HookProvider instances
                 or plain callable hook callbacks (functions with typed event parameters).
                 Defaults to None.
             session_manager: Manager for handling agent sessions including conversation history and state.

tests/strands/agent/test_agent_hooks.py

@@ -1054,19 +1054,6 @@ def my_callback(event: AgentInitializedEvent) -> None:
     assert length == 1
 
 
-def test_hooks_param_accepts_tuple():
-    """Verify that a tuple of hooks can be passed (Sequence support)."""
-    events_received = []
-
-    def my_callback(event: AgentInitializedEvent) -> None:
-        events_received.append(event)
-
-    agent = Agent(hooks=(my_callback,), callback_handler=None)
-
-    assert len(events_received) == 1
-    assert events_received[0].agent is agent
-
-
 def test_hooks_param_invalid_hook_raises_error():
     """Verify that passing an invalid hook raises ValueError."""
     with pytest.raises(ValueError, match="Invalid hook"):