chore: add ssh config

config/default.nix

@@ -4,5 +4,6 @@
     ./bash.nix
     ./git.nix
     ./starship.nix
+    ./ssh.nix
   ];
 }

config/ssh.nix

@@ -0,0 +1,20 @@
+{ ... }:
+
+{
+  programs.ssh = {
+    enable = true;
+    compression = true;
+    serverAliveInterval = 60;
+    serverAliveCountMax = 3;
+
+    # SSH Multiplexing - reuses existing SSH connections for multiple sessions, reducing authentication overhead and improving speed for subsequent logins.
+    controlPath = "~/.ssh/master-%r@%n:%p";
+    controlMaster = "auto";
+    controlPersist = "600";
+
+    # Include custom configs from 1Password (See packages/common/secrets.nix)
+    includes = [
+      "~/.ssh/config.d/*.conf"
+    ];
+  };
+}

flake.lock

@@ -41,11 +41,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1758346548,
-        "narHash": "sha256-afXE7AJ7MY6wY1pg/Y6UPHNYPy5GtUKeBkrZZ/gC71E=",
+        "lastModified": 1758589230,
+        "narHash": "sha256-zMTCFGe8aVGTEr2RqUi/QzC1nOIQ0N1HRsbqB4f646k=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "b2a3852bd078e68dd2b3dfa8c00c67af1f0a7d20",
+        "rev": "d1d883129b193f0b495d75c148c2c3a7d95789a0",
         "type": "github"
       },
       "original": {