⚗️ add new builtin plugin

nonebot/plugin.py

@@ -933,7 +933,7 @@ def load_plugins(*plugin_dir: str) -> Set[Plugin]:
     return loaded_plugins
 
 
-def load_builtin_plugins() -> Optional[Plugin]:
+def load_builtin_plugins(name: str = "echo") -> Optional[Plugin]:
     """
     :说明:
 
@@ -943,7 +943,7 @@ def load_builtin_plugins() -> Optional[Plugin]:
 
       - ``Plugin``
     """
-    return load_plugin("nonebot.plugins.base")
+    return load_plugin(f"nonebot.plugins.{name}")
 
 
 def get_plugin(name: str) -> Optional[Plugin]:

nonebot/plugin.pyi

@@ -168,7 +168,7 @@ def load_plugins(*plugin_dir: str) -> Set[Plugin]:
     ...
 
 
-def load_builtin_plugins():
+def load_builtin_plugins(name: str = ...):
     ...
 
 

nonebot/plugins/single_session.py

@@ -0,0 +1,20 @@
+from typing import Dict, Optional
+
+from nonebot.typing import T_State
+from nonebot.matcher import Matcher
+from nonebot.adapters import Bot, Event
+from nonebot.message import run_preprocessor, run_postprocessor, IgnoredException
+
+_running_matcher: Dict[str, bool] = {}
+
+
+@run_preprocessor
+async def _(matcher: Matcher, bot: Bot, event: Event, state: T_State):
+    # TODO
+    pass
+
+
+@run_postprocessor
+async def _(matcher: Matcher, exception: Optional[Exception], bot: Bot, event: Event, state: T_State):
+    # TODO
+    pass