diff --git a/src/syndicate/protocols/schemas/EntityRef.nim b/src/syndicate/protocols/schemas/EntityRef.nim
new file mode 100644
index 0000000..0aac8ed
--- /dev/null
+++ b/src/syndicate/protocols/schemas/EntityRef.nim
@@ -0,0 +1,2 @@
+type Cap* = object
+  discard
diff --git a/src/syndicate/protocols/schemas/Tupfile b/src/syndicate/protocols/schemas/Tupfile
new file mode 100644
index 0000000..ab46249
--- /dev/null
+++ b/src/syndicate/protocols/schemas/Tupfile
@@ -0,0 +1,5 @@
+PRESERVES_SRC_DIR = ../../../../preserves/src
+
+: $(PRESERVES_SRC_DIR)/preserves/private/preserves_schema_nim.nim |> nim c -o:%o %f |> preserves_schema_nim
+
+: foreach *.prs | preserves_schema_nim |> ./preserves_schema_nim %f; nim check --path:$(PRESERVES_SRC_DIR) %o |> %B.nim {gen}