diff --git a/home/syncthing.nix b/home/syncthing.nix
index e69de29..7566f39 100644
--- a/home/syncthing.nix
+++ b/home/syncthing.nix
@@ -0,0 +1,25 @@
+{ pkgs, ... }:
+{
+  # Syncthing - p2p file sync
+  # Config stored in ~/Library/Application Support/Syncthing/ (default)
+  # Currently syncs: music, traces
+  # Devices: poppy (this mac) + remote (UCWTYQI-...)
+  home.packages = [ pkgs.syncthing ];
+
+  # Autostart via launchd
+  # -no-browser: don't open GUI on startup
+  # KeepAlive: restart if crashes
+  # RunAtLoad: start at login
+  launchd.agents.syncthing = {
+    enable = true;
+    config = {
+      ProgramArguments = [
+        "${pkgs.syncthing}/bin/syncthing"
+        "-no-browser"
+      ];
+      RunAtLoad = true;
+      KeepAlive = true;
+      ProcessType = "Background";
+    };
+  };
+}