Add FluidSynth user service

Flake lock file updates:

• Updated input 'nix-openclaw':
    'github:openclaw/nix-openclaw/22c81f70a5369f9b1f74bda589b3c526db575069?narHash=sha256-qUXiscmAPjcjV0yGANh9ZuivOBNBckVEpexb7phihgc%3D' (2026-06-09)
  → 'github:openclaw/nix-openclaw/a60fb12d461edfdadb6dca65a3b72230e35014ad?narHash=sha256-/F/4Kg7t7accuaAzc8khMyK%2BxXReXjpU9Tn4L0LrnyI%3D' (2026-06-10)

flake.lock

@@ -133,11 +133,11 @@
         "qmd": "qmd"
       },
       "locked": {
-        "lastModified": 1779970580,
-        "narHash": "sha256-BbKrwdXnlY62bGxWsNKoHWywbewA09Do+ws7wTSte1c=",
+        "lastModified": 1781072789,
+        "narHash": "sha256-/F/4Kg7t7accuaAzc8khMyK+xXReXjpU9Tn4L0LrnyI=",
         "owner": "openclaw",
         "repo": "nix-openclaw",
-        "rev": "ed00b170386eca78d4ed380e15de618b983c70e1",
+        "rev": "a60fb12d461edfdadb6dca65a3b72230e35014ad",
         "type": "github"
       },
       "original": {
@@ -182,11 +182,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1779560665,
-        "narHash": "sha256-tpyBcxPpcQb8ukyNF7DoCwfSY3VPsxHoYwj00Cayv5o=",
+        "lastModified": 1780749050,
+        "narHash": "sha256-3av0pIjlOWQ6rDbNOmpUSvbNnJkGORQKKjb4LtCZsIY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "64c08a7ca051951c8eae34e3e3cb1e202fe36786",
+        "rev": "a799d3e3886da994fa307f817a6bc705ae538eeb",
         "type": "github"
       },
       "original": {
@@ -230,11 +230,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1779796641,
-        "narHash": "sha256-ZsIrKmhp4vbBXoXXmR/tBXA/UCsAQiJL9vsgZEduhVY=",
+        "lastModified": 1780952837,
+        "narHash": "sha256-Fwd1+spDtQ0hDyBwme6ufG3n4mY0UrjjFdYHv+G/Hds=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "25f538306313eae3927264466c70d7001dcea1df",
+        "rev": "e820eb4a444b46a19b2e03e8dfd2359439ff30fe",
         "type": "github"
       },
       "original": {
@@ -317,11 +317,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1779946062,
-        "narHash": "sha256-M/2bCPYjiBTkDNV29J/00z10RM3yYnL9X74RqAHDme0=",
+        "lastModified": 1780637620,
+        "narHash": "sha256-ngPdHinPyF0AMxRr32qt+TZCv0sagmooBW14u6DfjSU=",
         "owner": "youwen5",
         "repo": "zen-browser-flake",
-        "rev": "2e2c38ba20a3d614d0196e0aa44851547306e861",
+        "rev": "8c62bc6a72ac5a5b8d1b41b2b88dfed9d9932c48",
         "type": "github"
       },
       "original": {

flake.nix

@@ -67,6 +67,16 @@
         inherit system;
         modules = [
           ./hosts/NixOracle/configuration.nix
+          {
+            nixpkgs.overlays = [
+              (final: prev: {
+                unstable = import nixpkgs-unstable {
+                  inherit system;
+                  config = prev.config;
+                };
+              })
+            ];
+          }
         ];
       };
     };

home/ltadeu6.nix

@@ -1,6 +1,32 @@
 { config, pkgs, lib, ... }:
 
 let
+  fluidsynthStart = pkgs.writeShellScript "fluidsynth-start" ''
+    ${pkgs.fluidsynth}/bin/fluidsynth \
+      -a pulseaudio -m alsa_seq -g 1.0 -q \
+      ${pkgs.soundfont-fluid}/share/soundfonts/FluidR3_GM2-2.sf2 >/dev/null &
+    FLUID_PID=$!
+
+    # Loop indefinitely: connect Minilab3 when it appears, reconnect if unplugged
+    while kill -0 "$FLUID_PID" 2>/dev/null; do
+      MINI=$(${pkgs.gawk}/bin/awk '/"Minilab3"/{print $2}' /proc/asound/seq/clients 2>/dev/null)
+      FLUID=$(${pkgs.gawk}/bin/awk '/FLUID Synth/{print $2}' /proc/asound/seq/clients 2>/dev/null)
+      if [ -n "$MINI" ] && [ -n "$FLUID" ]; then
+        if ${pkgs.alsa-utils}/bin/aconnect -l 2>/dev/null | grep -q "Connected From:.*$MINI"; then
+          : # already connected
+        else
+          echo "Connecting Minilab3 ($MINI) -> FluidSynth ($FLUID)" >&2
+          ${pkgs.alsa-utils}/bin/aconnect "$MINI:0" "$FLUID:0" >&2
+        fi
+      else
+        echo "Waiting: MINI='$MINI' FLUID='$FLUID'" >&2
+      fi
+      ${pkgs.coreutils}/bin/sleep 2
+    done
+
+    wait $FLUID_PID
+  '';
+
   gameSaveBackupRoot = "${config.home.homeDirectory}/Backups/game-saves";
   gameSaveLudusaviPath = "${gameSaveBackupRoot}/ludusavi";
   gameSaveLutrisWinePrefix = "${config.home.homeDirectory}/Games/none";
@@ -346,6 +372,10 @@ in
     sageWithDoc
     evince
     poppler-utils
+    fluidsynth
+    soundfont-fluid
+    alsa-utils
+    spotify-player
   ];
 
   home.file = {
@@ -427,6 +457,20 @@ in
     ".config/wofi/menu.css".source = ../configs/wofi/menu.css;
   };
 
+  systemd.user.services.fluidsynth = {
+    Unit = {
+      Description = "FluidSynth software MIDI synthesizer";
+      After = [ "pipewire-pulse.service" ];
+    };
+    Service = {
+      Type = "simple";
+      ExecStart = "${fluidsynthStart}";
+      Restart = "on-failure";
+      RestartSec = "5s";
+    };
+    Install.WantedBy = [ "default.target" ];
+  };
+
   systemd.user.services.game-save-ludusavi-backup = {
     Unit.Description = "Back up game saves with Ludusavi";
     Service = {

hosts/NixOracle/configuration.nix

@@ -1,4 +1,4 @@
-{ pkgs, config, ... }:
+{ pkgs, config, lib, ... }:
 let
   username = "ltadeu6";
   sshAuthorizedKeys = [
@@ -36,7 +36,13 @@ in {
     ./hardware-configuration.nix
   ];
 
+  nixpkgs.config.allowUnfreePredicate = pkg:
+    builtins.elem (lib.getName pkg) [
+      "claude-code"
+    ];
+
   environment.systemPackages = with pkgs; [
+    claude-code
     curl
     fd
     git
@@ -47,6 +53,7 @@ in {
     ripgrep
     starship
     tmux
+    unstable.codex
     wget
   ];