diff --git a/gen-requirements.txt b/scripts/gen-requirements.txt
similarity index 100%
rename from gen-requirements.txt
rename to scripts/gen-requirements.txt
diff --git a/scripts/plugin.py b/scripts/plugin.py
index 5740236..82345cd 100755
--- a/scripts/plugin.py
+++ b/scripts/plugin.py
@@ -32,6 +32,17 @@
 
 # Inline the size function for a given proto message field
 def inline_size_function(proto_type: str, field_name: str, field_tag: str) -> str:
+    """
+    For example:
+
+    class MessageMarshaler:
+        def size_uint32(self, TAG: bytes, FIELD_ATTR: int) -> int:
+            return len(TAG) + Varint.size_varint_u32(FIELD_ATTR)
+    
+    Becomes:
+
+    size += len(b"\x10") + Varint.size_varint_u32(self.int_value)
+    """
     function_definition = inspect.getsource(globals()["MessageMarshaler"].__dict__[f"size_{proto_type}"])
     # Remove the function header and unindent the function body
     function_definition = function_definition.splitlines()[1:]
@@ -47,6 +58,19 @@ def inline_size_function(proto_type: str, field_name: str, field_tag: str) -> st
 
 # Inline the serialization function for a given proto message field
 def inline_serialize_function(proto_type: str, field_name: str, field_tag: str) -> str:
+    """
+    For example:
+
+    class MessageMarshaler:
+        def serialize_uint32(self, out: BytesIO, TAG: bytes, FIELD_ATTR: int) -> None:
+            out.write(TAG)
+            Varint.serialize_varint_u32(out, FIELD_ATTR)
+    
+    Becomes:
+
+    out.write(b"\x10")
+    Varint.serialize_varint_u32(out, self.int_value)
+    """
     function_definition = inspect.getsource(globals()["MessageMarshaler"].__dict__[f"serialize_{proto_type}"])
     # Remove the function header and unindent the function body
     function_definition = function_definition.splitlines()[1:]
diff --git a/scripts/proto_codegen.sh b/scripts/proto_codegen.sh
index f067122..9db288f 100755
--- a/scripts/proto_codegen.sh
+++ b/scripts/proto_codegen.sh
@@ -32,7 +32,7 @@ echo "Creating temporary virtualenv at $venv_dir using $(python3 --version)"
 python3 -m venv $venv_dir
 source $venv_dir/bin/activate
 python -m pip install \
-    -c $repo_root/gen-requirements.txt \
+    -c $repo_root/scripts/gen-requirements.txt \
     protobuf Jinja2 grpcio-tools black isort .
 
 echo 'python -m grpc_tools.protoc --version'