diff --git a/devenv.nix b/devenv.nix
index ff02410..216e000 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -5,7 +5,7 @@
   # env.GREET = "devenv";
 
   # https://devenv.sh/packages/
-  packages = [ pkgs.git ];
+  packages = [ pkgs.git pkgs.git-bug ];
 
   # enterShell = ''
   #   hello
diff --git a/doc/backlog.md b/doc/backlog.md
new file mode 100644
index 0000000..30891e1
--- /dev/null
+++ b/doc/backlog.md
@@ -0,0 +1,7 @@
+# Backlog
+
+* lib rust backgammon
+  - https://docs.rs/crate/backgammon/0.4.0
+  - https://github.com/marktani/backgammon
+* network webtarot
+* front ?