merge this (#4759)

* wait I forgot to comit locally

* cp the entire core directory and then rm the .git subdir

fern/python-reference/LettaMessage.mdx

@@ -0,0 +1,67 @@
+---
+slug: python-reference/LettaMessage
+---
+
+<a id="letta.schemas.letta_message.LettaMessage"></a>
+
+## LettaMessage
+
+```python
+class LettaMessage(BaseModel)
+```
+
+Base class for simplified Letta message response type. This is intended to be used for developers who want the internal monologue, function calls, and function returns in a simplified format that does not include additional information other than the content and timestamp.
+
+**Attributes**:
+
+- `id` _str_ - The ID of the message
+- `date` _datetime_ - The date the message was created in ISO format
+
+<a id="letta.schemas.letta_message.InternalMonologue"></a>
+
+## InternalMonologue
+
+```python
+class InternalMonologue(LettaMessage)
+```
+
+Representation of an agent's internal monologue.
+
+**Attributes**:
+
+- `internal_monologue` _str_ - The internal monologue of the agent
+- `id` _str_ - The ID of the message
+- `date` _datetime_ - The date the message was created in ISO format
+
+<a id="letta.schemas.letta_message.FunctionCallMessage"></a>
+
+## FunctionCallMessage
+
+```python
+class FunctionCallMessage(LettaMessage)
+```
+
+A message representing a request to call a function (generated by the LLM to trigger function execution).
+
+**Attributes**:
+
+- `function_call` _Union[FunctionCall, FunctionCallDelta]_ - The function call
+- `id` _str_ - The ID of the message
+- `date` _datetime_ - The date the message was created in ISO format
+
+<a id="letta.schemas.letta_message.FunctionReturn"></a>
+
+## FunctionReturn
+
+```python
+class FunctionReturn(LettaMessage)
+```
+
+A message representing the return value of a function call (generated by Letta executing the requested function).
+
+**Attributes**:
+
+- `function_return` _str_ - The return value of the function
+- `status` _Literal["success", "error"]_ - The status of the function call
+- `id` _str_ - The ID of the message
+- `date` _datetime_ - The date the message was created in ISO format