diff --git a/.gitignore b/.gitignore
index 61f28a0e96246ffaa0851919c98e068b7775ddc8..3c21a55c476178d7ce7460547470dd532891a79a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 .idea
 *.o
 build
-*.pdf
+doc/*.pdf
diff --git a/proto.pdf b/proto.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..5835c84889e6c36676ea7e72facb0e82ed219c2b
Binary files /dev/null and b/proto.pdf differ