feat：优化timing门控逻辑，减少消耗，提高速度

src/maisaka/builtin_tool/__init__.py

@@ -10,6 +10,8 @@ from src.llm_models.payload_content.tool_option import ToolDefinitionInput
 from .context import BuiltinToolRuntimeContext
 from .continue_tool import get_tool_spec as get_continue_tool_spec
 from .continue_tool import handle_tool as handle_continue_tool
+from .finish import get_tool_spec as get_finish_tool_spec
+from .finish import handle_tool as handle_finish_tool
 from .no_reply import get_tool_spec as get_no_reply_tool_spec
 from .no_reply import handle_tool as handle_no_reply_tool
 from .query_jargon import get_tool_spec as get_query_jargon_tool_spec
@@ -44,6 +46,7 @@ def get_action_tool_specs() -> List[ToolSpec]:
     """获取 Action Loop 阶段可用的内置工具声明。"""
 
     return [
+        get_finish_tool_spec(),
         get_reply_tool_spec(),
         get_view_complex_message_tool_spec(),
         get_query_jargon_tool_spec(),
@@ -63,6 +66,7 @@ def get_all_builtin_tool_specs() -> List[ToolSpec]:
 
     return [
         *get_timing_tool_specs(),
+        get_finish_tool_spec(),
         get_reply_tool_spec(),
         get_view_complex_message_tool_spec(),
         get_query_jargon_tool_spec(),
@@ -95,6 +99,7 @@ def build_builtin_tool_handlers(tool_ctx: BuiltinToolRuntimeContext) -> Dict[str
 
     return {
         "continue": lambda invocation, context=None: handle_continue_tool(tool_ctx, invocation, context),
+        "finish": lambda invocation, context=None: handle_finish_tool(tool_ctx, invocation, context),
         "reply": lambda invocation, context=None: handle_reply_tool(tool_ctx, invocation, context),
         "no_reply": lambda invocation, context=None: handle_no_reply_tool(tool_ctx, invocation, context),
         "query_jargon": lambda invocation, context=None: handle_query_jargon_tool(tool_ctx, invocation, context),

src/maisaka/builtin_tool/finish.py

@@ -0,0 +1,34 @@
+"""finish 内置工具。"""
+
+from typing import Optional
+
+from src.core.tooling import ToolExecutionContext, ToolExecutionResult, ToolInvocation, ToolSpec
+
+from .context import BuiltinToolRuntimeContext
+
+
+def get_tool_spec() -> ToolSpec:
+    """获取 finish 工具声明。"""
+
+    return ToolSpec(
+        name="finish",
+        brief_description="结束本轮思考，等待后续新的外部消息再继续。",
+        provider_name="maisaka_builtin",
+        provider_type="builtin",
+    )
+
+
+async def handle_tool(
+    tool_ctx: BuiltinToolRuntimeContext,
+    invocation: ToolInvocation,
+    context: Optional[ToolExecutionContext] = None,
+) -> ToolExecutionResult:
+    """执行 finish 内置工具。"""
+
+    del context
+    tool_ctx.runtime._enter_stop_state()
+    return tool_ctx.build_success_result(
+        invocation.tool_name,
+        "当前对话循环已结束本轮思考，等待新的外部消息到来。",
+        metadata={"pause_execution": True},
+    )