diff --git a/home/duti.nix b/home/duti.nix
index e69de29..610d948 100644
--- a/home/duti.nix
+++ b/home/duti.nix
@@ -0,0 +1,25 @@
+{ pkgs, ... }: {
+  home.packages = [ pkgs.duti ];
+
+  xdg.configFile."duti/config".text = ''
+    # browser
+    com.google.Chrome public.html
+    com.google.Chrome public.url
+    com.google.Chrome public.xhtml
+
+    # text editor (.txt files use com.apple.traditional-mac-plain-text)
+    VSCodium com.apple.traditional-mac-plain-text
+    VSCodium public.text
+    VSCodium public.plain-text
+
+    # markdown viewer
+    MarkEdit net.daringfireball.markdown
+
+    # terminal
+    kitty public.shell-script
+
+    # pdf
+    com.apple.Preview com.adobe.pdf
+  '';
+  # defaults applied via system.activationScripts.defaultApps in hosts/poppy/default.nix
+}