diff --git a/simplemind/models.py b/simplemind/models.py
index 1f92757..4a85c99 100644
--- a/simplemind/models.py
+++ b/simplemind/models.py
@@ -41,6 +41,7 @@ class Conversation(SMBaseModel):
     messages: List[Message] = []
     llm_model: Optional[str] = None
     llm_provider: Optional[str] = None
+    plugins: List[Any] = []
 
     def __str__(self):
         return f"<Conversation id={self.id!r}>"
@@ -53,8 +54,15 @@ class Conversation(SMBaseModel):
         self, llm_model: Optional[str] = None, llm_provider: Optional[str] = None
     ) -> Message:
         """Send the conversation to the LLM."""
+        for plugin in self.plugins:
+            plugin.send_hook(self)
+
         provider = find_provider(llm_provider or self.llm_provider)
         response = provider.send_conversation(self)
 
         self.add_message(role="assistant", text=response.text, meta=response.meta)
         return response
+
+    def add_plugin(self, plugin: Any):
+        """Add a plugin to the conversation."""
+        self.plugins.append(plugin)
diff --git a/t.py b/t.py
index fac4751..503cfe0 100644
--- a/t.py
+++ b/t.py
@@ -1,11 +1,28 @@
 import simplemind as sm
 
 
+class SimpleMemoryPlugin:
+    def __init__(self):
+        self.memories = [
+            "the earth has fictionally beeen destroyed.",
+            "the moon is made of cheese.",
+        ]
+
+    def yield_memories(self):
+        return (m for m in self.memories)
+
+    def send_hook(self, conversation: sm.Conversation):
+        for m in self.yield_memories():
+            conversation.add_message(role="system", text=m)
+
+
 conversation = sm.create_conversation(llm_model="grok-beta", llm_provider="xai")
+conversation.add_plugin(SimpleMemoryPlugin())
+
 
 conversation.add_message(
     role="user",
-    text="Write a poem about working at dominoes",
+    text="Write a poem about the moon",
 )
 r = conversation.send()