Add central Nix builder and binary cache

* fix(vesktop): add WebRTC IP handling support

* fix(vesktop): constrain WebRTC interface selection

AGENTS.md

@@ -357,6 +357,7 @@ modules/profiles/
 │   ├── labwc/
 │   └── niri/
 ├── networking/
+│   ├── homelab-cache-client/
 │   ├── tailscale-client/
 │   └── tailscale-subnet-router/
 ├── platform/
@@ -367,7 +368,11 @@ modules/profiles/
 │   ├── desktop/
 │   └── vm/
 ├── workload/
+│   ├── camera/
 │   ├── development/
+│   ├── game/
+│   ├── machine-learning/
+│   ├── nix-builder/
 │   ├── personal/
 │   ├── server/
 │   └── remote-access/
@@ -602,6 +607,7 @@ A host registry may use a specification like this:
       "security.secrets"
       "security.secure-boot"
       "security.tpm-storage"
+      "workload.camera"
       "workload.development"
       "workload.personal"
     ];
@@ -624,6 +630,7 @@ A host registry may use a specification like this:
       "security.tpm-storage"
       "workload.development"
       "workload.game"
+      "workload.machine-learning"
       "workload.personal"
     ];
   };

docs/ios-simulator.md

@@ -0,0 +1,119 @@
+# iOS Simulator 初期セットアップ
+
+この手順は `m2` の macOS 環境で、stable Xcode と最新の stable iOS Simulator Runtime を使える状態にするためのもの。
+
+## 前提
+
+- `m2` が `workload.development` profile を有効にしていること
+- Mac App Store に Apple Account でサインイン済みであること
+- dotfiles を最新化していること
+
+Xcode 本体は `applications.xcode` が Mac App Store 版を管理する。Simulator Runtime は Apple が管理する mutable state のため、Nix store には入れず専用 dev shell から導入する。
+
+## 1. macOS 設定を反映する
+
+リポジトリ直下で nix-darwin の設定を反映する。
+
+```bash
+sudo darwin-rebuild switch --flake .#m2
+```
+
+これにより `/Applications/Xcode.app` に stable Xcode がインストールされる。
+
+Xcode のインストールで Mac App Store の認証エラーになる場合は、App Store を一度開いてサインイン状態を確認してから再実行する。
+
+## 2. iOS Simulator Runtime を導入する
+
+初回セットアップは次の1コマンドで行う。
+
+```bash
+nix develop .#ios -c ios-simulator-install
+```
+
+`ios-simulator-install` は次を順に実行する。
+
+1. `/Applications/Xcode.app` が存在することを確認
+2. `xcode-select` の Developer Directory を stable Xcode に切り替え
+3. Xcode の first-launch components を導入
+4. 利用可能な新しい hardware support components を確認
+5. 選択中の Xcode に対応する最新の iOS Simulator Runtime をダウンロードしてインストール
+6. Xcode のバージョンとインストール済み Simulator Runtime を表示
+
+途中で `sudo` の認証を求められる場合がある。
+
+## 3. インストールを確認する
+
+```bash
+xcodebuild -version
+xcode-select -p
+xcrun simctl list runtimes
+xcrun simctl list devices available
+```
+
+`xcode-select -p` は次を指していること。
+
+```text
+/Applications/Xcode.app/Contents/Developer
+```
+
+`xcrun simctl list runtimes` に iOS runtime が表示されればセットアップ完了。
+
+## 4. Simulator を起動する
+
+```bash
+open -a Simulator
+```
+
+Simulator の Device メニューから、インストール済み runtime で利用可能な iPhone を選択する。
+
+## Runtime の更新
+
+Xcode を stable の新しいバージョンへ更新した後は、同じコマンドを再実行する。
+
+```bash
+nix develop .#ios -c ios-simulator-install
+```
+
+Xcode の選択、first-launch components、hardware support、iOS Simulator Runtime の状態をまとめて更新できる。
+
+## トラブルシューティング
+
+### Xcode が見つからない
+
+次のエラーが出る場合、先に nix-darwin の設定を反映する。
+
+```text
+Xcode is not installed at /Applications/Xcode.app.
+```
+
+```bash
+sudo darwin-rebuild switch --flake .#m2
+```
+
+### Simulator Runtime が見えない
+
+まず runtime 一覧を確認する。
+
+```bash
+xcrun simctl list runtimes
+```
+
+iOS runtime がない場合は再度インストーラーを実行する。
+
+```bash
+nix develop .#ios -c ios-simulator-install
+```
+
+### Command Line Tools 側を参照している
+
+```bash
+xcode-select -p
+```
+
+が `/Library/Developer/CommandLineTools` を指している場合でも、`ios-simulator-install` が `/Applications/Xcode.app/Contents/Developer` へ切り替える。
+
+手動で直す場合は次を実行する。
+
+```bash
+sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
+```

flake.nix

@@ -38,12 +38,6 @@
       url = "github:ghostty-org/ghostty";
     };
 
-    # Speech to text
-    handy = {
-      url = "github:cjpais/Handy";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-
     # Shell / Launcher
     vicinae.url = "github:vicinaehq/vicinae";
 
@@ -66,6 +60,11 @@
       inputs.nixpkgs.follows = "nixpkgs";
     };
 
+    deploy-rs = {
+      url = "github:serokell/deploy-rs";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
     # Disk management
     disko = {
       url = "github:nix-community/disko";
@@ -97,6 +96,13 @@
       url = "github:ilysenko/codex-desktop-linux";
     };
 
+    codex-session-usage.url = "github:moons-14/codex-session-usage";
+
+    skills = {
+      url = "github:mattpocock/skills";
+      flake = false;
+    };
+
     # Index / Search
     nix-index-database = {
       url = "github:nix-community/nix-index-database";

flake/default.nix

@@ -1,5 +1,6 @@
 {
   imports = [
+    ./deploy.nix
     ./formatter.nix
     ./git-hooks.nix
     ./registry.nix

flake/deploy.nix

@@ -0,0 +1,28 @@
+{
+  inputs,
+  self,
+  ...
+}:
+{
+  flake.deploy = {
+    nodes.nix-builder = {
+      hostname = "nix-builder";
+      sshUser = "moons";
+      user = "root";
+
+      interactiveSudo = true;
+      remoteBuild = true;
+      autoRollback = true;
+      magicRollback = true;
+
+      profiles.system.path = inputs.deploy-rs.lib.x86_64-linux.activate.nixos self.nixosConfigurations.nix-builder;
+    };
+  };
+
+  perSystem =
+    { system, ... }:
+    {
+      apps.deploy = inputs.deploy-rs.apps.${system}.default;
+      checks = inputs.deploy-rs.lib.${system}.deployChecks self.deploy;
+    };
+}

hosts/default.nix

@@ -1,47 +1,20 @@
 {
-  nix-example = {
+  nix-builder = {
     system = "x86_64-linux";
     stateVersion = "26.05";
     user = "moons";
-    path = ./nix-example;
+    path = ./nix-builder;
 
     profiles = [
       "base"
       "interface.cli"
+      "networking.tailscale-client"
       "platform.vm"
-      "workload.development"
+      "workload.nix-builder"
       "workload.remote-access"
     ];
   };
 
-  ops = {
-    system = "x86_64-linux";
-    stateVersion = "26.05";
-    user = "moons";
-    path = ./ops;
-
-    profiles = [
-      "base"
-      "interface.cli"
-      "platform.vm"
-      "workload.remote-access"
-    ];
-  };
-
-  internal-app-01 = {
-    system = "x86_64-linux";
-    stateVersion = "26.05";
-    user = "moons";
-    path = ./internal-app-01;
-
-    profiles = [
-      "base"
-      "interface.cli"
-      "platform.vm"
-      "workload.server"
-    ];
-  };
-
   installer = {
     system = "x86_64-linux";
     stateVersion = "26.05";
@@ -91,6 +64,7 @@
       "workload.game"
       "workload.personal"
     ];
+
   };
 
   galleria = {
@@ -104,6 +78,7 @@
       "interface.cli"
       "interface.labwc"
       "interface.niri"
+      "networking.tailscale-client"
       "platform.intel-nvidia-desktop"
       "security.secrets"
       "security.secure-boot"
@@ -111,7 +86,9 @@
       "security.fingerprint"
       "workload.development"
       "workload.game"
+      "workload.machine-learning"
       "workload.personal"
+      "workload.camera"
     ];
   };
 

hosts/galleria/home.nix

@@ -4,6 +4,11 @@
   ...
 }:
 {
+  # This desktop is permanently connected to AC power.
+  systemd.user.services.swayidle.Service.Environment = [
+    "SWAYIDLE_ASSUME_AC=1"
+  ];
+
   services.kanshi = {
     enable = true;
 

hosts/galleria/nixos.nix

@@ -8,6 +8,13 @@
   boot.initrd.luks.devices.cryptroot.device =
     "/dev/disk/by-partuuid/04295552-cbb8-4511-ac1e-1171ec20f8d1";
 
+  # Keep Windows data and recovery partitions out of UDisks-based file
+  # managers. The shared EFI System Partition stays available as /boot.
+  services.udev.extraRules = ''
+    ENV{ID_PART_ENTRY_UUID}=="0480f887-d1f9-489d-b8fe-78549ced1938", ENV{UDISKS_IGNORE}="1"
+    ENV{ID_PART_ENTRY_UUID}=="6c70041b-3f65-4eb1-8b08-18ed20001877", ENV{UDISKS_IGNORE}="1"
+  '';
+
   environment.systemPackages = with inputs.browser-previews.packages.${pkgs.system}; [
     google-chrome-beta
   ];

hosts/installer/nixos.nix

@@ -31,6 +31,7 @@
   users.users.root.openssh.authorizedKeys.keys = [
     "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIKhxDkucmeCor6CKoXAua7DgDSzuXrZOtpdkyzQxz5+aAAAABHNzaDo= moons@moons14.com"
     "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIN6hZJyng/5LgFKPjR6uZAd/00UkO0vN0uQOoIvfSELdAAAABHNzaDo= moons@moons14.com"
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPLwReAiwhXoO34S2+MrvqUhi8IWp4IzUq4OSp3niJdq"
   ];
 
   environment.systemPackages = with pkgs; [

hosts/internal-app-01/nixos.nix

@@ -1,3 +0,0 @@
-{
-  imports = [ ./hardware-configuration.nix ];
-}

hosts/nix-builder/README.md

@@ -0,0 +1,101 @@
+# nix-builder bootstrap
+
+The host configuration can be built before its cache signing secret exists.
+Harmonia's socket remains stopped until SOPS installs the signing key at
+`/run/secrets/harmonia/signing-key`.
+
+## Proxmox storage layout
+
+The host configuration expects three filesystems. Keep the build scratch space
+separate from the store so a large build cannot fill the root filesystem.
+
+| Mount point          | Suggested size | Contents                        |
+| -------------------- | -------------- | ------------------------------- |
+| `/`                  | 48 GiB         | NixOS and mutable system state  |
+| `/var/lib/nix-build` | 192 GiB        | Disposable build scratch space  |
+| `/nix/store`         | 1 TiB          | Fleet closures and binary cache |
+
+The build-server policy starts emergency store GC below 64 GiB free and aims
+for 128 GiB free. Persistent roots under `/var/lib/nix-fleet/roots` protect the
+latest fleet builds from that GC. It also limits Nix to two concurrent
+derivations while allowing each derivation to use every vCPU assigned to the
+VM.
+
+For the two dedicated ext4 data filesystems, remove the default root-reserved
+blocks once after formatting; keep the root filesystem's reserve intact:
+
+```bash
+sudo tune2fs -m 0 /dev/disk/by-label/nix-build
+sudo tune2fs -m 0 /dev/disk/by-label/nix-store
+```
+
+## Initial deployment
+
+Once the VM is reachable as `moons@nix-builder`, deploy it from the repository:
+
+```bash
+nix run .#deploy -- .#nix-builder
+```
+
+deploy-rs uses the target's `ssh-ng` store, so the system closure is built on
+the builder rather than copied from the laptop. Automatic and magic rollback
+remain enabled.
+
+## Add the host SOPS recipient
+
+After the VM has a stable SSH host key, derive its age recipient:
+
+```bash
+ssh-keyscan -t ed25519 nix-builder 2>/dev/null | ssh-to-age
+```
+
+Add the recipient to `.sops.yaml` and add a creation rule for
+`secrets/hosts/nix-builder/*.yaml`. The admin YubiKey recipient should remain in
+the same key group for recovery.
+
+## Generate the cache signing key
+
+Run this on a trusted Nix machine, preferably with the temporary files on a
+tmpfs:
+
+```bash
+nix-store --generate-binary-cache-key \
+  cache.app.homelabs.run-1 \
+  harmonia.private \
+  harmonia.public
+```
+
+Create `secrets/hosts/nix-builder/system.yaml` with SOPS and store the complete
+contents of `harmonia.private` at `harmonia.signing-key`:
+
+```yaml
+harmonia:
+  signing-key: cache.app.homelabs.run-1:REDACTED
+```
+
+Copy the complete contents of `harmonia.public` to
+`modules/systems/nix/homelab-cache/public-key`. The private plaintext file must
+not be committed or retained.
+
+After committing both encrypted/public files, select
+`networking.homelab-cache-client` on each client host.
+
+Redeploy the builder and verify the cache after installing the secret:
+
+```bash
+nix run .#deploy -- .#nix-builder
+curl --fail http://nix-builder:5000/nix-cache-info
+```
+
+## Normal operation
+
+Run `fleet-build` on the builder to build and root every NixOS host, or pass a
+list of host names to build only those hosts. Run `fleet-deploy` with the normal
+deploy-rs target syntax when additional fleet nodes have been added to
+`flake/deploy.nix`:
+
+```bash
+fleet-build
+fleet-build x1g13 galleria
+fleet-deploy .#nix-builder
+```

hosts/nix-builder/filesystem.nix

@@ -0,0 +1,25 @@
+{
+  fileSystems."/nix/store" = {
+    device = "/dev/disk/by-label/nix-store";
+    fsType = "ext4";
+
+    options = [
+      "noatime"
+    ];
+
+    neededForBoot = true;
+  };
+
+  fileSystems."/var/lib/nix-build" = {
+    device = "/dev/disk/by-label/nix-build";
+    fsType = "ext4";
+
+    options = [
+      "noatime"
+    ];
+  };
+
+  nix.settings.build-dir = "/var/lib/nix-build";
+
+  services.fstrim.enable = true;
+}

hosts/nix-builder/hardware-configuration.nix

@@ -1,8 +1,12 @@
-# Do not modify this file! It was generated by `nixos-generate-config` and may
-# be overwritten by future invocations.
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
 { lib, modulesPath, ... }:
+
 {
-  imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
 
   boot.initrd.availableKernelModules = [
     "ata_piix"
@@ -17,12 +21,12 @@
   boot.extraModulePackages = [ ];
 
   fileSystems."/" = {
-    device = "/dev/disk/by-uuid/1b12ab98-2537-4207-a3f4-bb8ba7b53b00";
+    device = "/dev/disk/by-uuid/49fc2e1c-7909-41cc-ac78-55b4d9a01e62";
     fsType = "ext4";
   };
 
   fileSystems."/boot" = {
-    device = "/dev/disk/by-uuid/8365-C778";
+    device = "/dev/disk/by-uuid/40D4-ABBE";
     fsType = "vfat";
     options = [
       "fmask=0077"

hosts/nix-builder/nixos.nix

@@ -0,0 +1,19 @@
+{ lib, ... }:
+let
+  hostSecrets = ../../secrets/hosts/nix-builder/system.yaml;
+in
+{
+  imports = [
+    ./filesystem.nix
+    ./hardware-configuration.nix
+  ];
+
+  sops.secrets = lib.mkIf (builtins.pathExists hostSecrets) {
+    "harmonia/signing-key" = {
+      sopsFile = hostSecrets;
+      restartUnits = [ "harmonia.service" ];
+    };
+  };
+
+  networking.firewall.interfaces."tailscale0".allowedTCPPorts = [ 5000 ];
+}

hosts/ops/hardware-configuration.nix

@@ -1,36 +0,0 @@
-# Do not modify this file! It was generated by `nixos-generate-config` and may
-# be overwritten by future invocations.
-{ lib, modulesPath, ... }:
-{
-  imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];
-
-  boot.initrd.availableKernelModules = [
-    "ata_piix"
-    "uhci_hcd"
-    "virtio_pci"
-    "virtio_scsi"
-    "sd_mod"
-    "sr_mod"
-  ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" = {
-    device = "/dev/disk/by-uuid/69fa2193-1e4f-438a-8898-5de8a3f36e5b";
-    fsType = "ext4";
-  };
-
-  fileSystems."/boot" = {
-    device = "/dev/disk/by-uuid/D09B-4277";
-    fsType = "vfat";
-    options = [
-      "fmask=0077"
-      "dmask=0077"
-    ];
-  };
-
-  swapDevices = [ ];
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-}

hosts/ops/nixos.nix

@@ -1,51 +0,0 @@
-{
-  imports = [ ./hardware-configuration.nix ];
-
-  networking = {
-    useDHCP = false;
-
-    interfaces = {
-      ens18 = {
-        useDHCP = false;
-        ipv4.addresses = [
-          {
-            address = "10.50.128.20";
-            prefixLength = 24;
-          }
-        ];
-      };
-
-      ens19 = {
-        useDHCP = false;
-        ipv4.addresses = [
-          {
-            address = "10.50.7.101";
-            prefixLength = 24;
-          }
-        ];
-      };
-
-      ens20 = {
-        useDHCP = false;
-        ipv4.routes = [
-          {
-            address = "10.50.64.0";
-            prefixLength = 24;
-            via = "10.50.82.1";
-          }
-        ];
-        ipv4.addresses = [
-          {
-            address = "10.50.82.10";
-            prefixLength = 24;
-          }
-        ];
-      };
-    };
-
-    defaultGateway = {
-      address = "10.50.128.1";
-      interface = "ens18";
-    };
-  };
-}

modules/applications/chrome/home/nixos.nix

@@ -1,9 +1,37 @@
-_: {
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  chrome = pkgs.google-chrome.overrideAttrs (old: {
+    nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ pkgs.makeWrapper ];
+
+    postFixup = (old.postFixup or "") + ''
+      wrapProgram $out/bin/google-chrome-stable \
+        --set LIBVA_DRIVER_NAME nvidia \
+        --set NVD_BACKEND direct
+    '';
+  });
+
+  features = [
+    "MiddleClickAutoscroll"
+    "AcceleratedVideoDecoder"
+    "AcceleratedVideoDecodeLinuxGL"
+    "PlatformHEVCDecoderSupport"
+  ]
+  ++ lib.optional config.my.hardwares.nvidia.enable "VaapiOnNvidiaGPUs";
+in
+{
   programs.google-chrome = {
     enable = true;
+    package = if config.my.hardwares.nvidia.enable then chrome else pkgs.google-chrome;
 
     commandLineArgs = [
-      "--enable-features=MiddleClickAutoscroll"
+      "--enable-features=${lib.concatStringsSep "," features}"
+      "--use-gl=angle"
+      "--use-angle=gl"
     ];
   };
 

modules/applications/codex-desktop/meta.nix

@@ -1,10 +1,5 @@
-{ inputs, ... }:
-{
+_: {
   description = "Codex Desktop for Linux";
 
   includes = [ "applications.codex" ];
-
-  imports.nixos = [
-    inputs.codex-desktop-linux.nixosModules.default
-  ];
 }

modules/applications/codex-desktop/nixos.nix

@@ -4,15 +4,7 @@
   ...
 }:
 {
-  programs.codexDesktopLinux = {
-    enable = true;
-    cliPackage = inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.codex;
-    remoteControl.enable = true;
-    remoteMobileControl.enable = true;
-    computerUseUi.enable = false;
-    linuxFeatures = [
-      "appshots"
-      "open-target-discovery"
-    ];
-  };
+  environment.systemPackages = [
+    inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.chatgpt
+  ];
 }

modules/applications/codex-session-usage/home.nix

@@ -0,0 +1,52 @@
+{
+  lib,
+  pkgs,
+  inputs,
+  ...
+}:
+let
+  codexSessionUsage = inputs.codex-session-usage.packages.${pkgs.stdenv.hostPlatform.system}.default;
+in
+{
+  home.packages = [ codexSessionUsage ];
+
+  xdg.dataFile = {
+    "vicinae/scripts/codex-session-usage/start" = {
+      executable = true;
+      text = ''
+        #!${lib.getExe pkgs.bash}
+        # @vicinae.schemaVersion 1
+        # @vicinae.title Start Codex Session Usage
+        # @vicinae.description Start the local Codex session usage dashboard
+        # @vicinae.mode compact
+        # @vicinae.icon 📊
+        # @vicinae.argument1 { "type": "text", "placeholder": "Port (optional)", "optional": true }
+
+        if [[ -z "$1" ]]; then
+          exec ${lib.getExe codexSessionUsage} start
+        fi
+
+        if [[ "$1" =~ ^[0-9]+$ ]] && (( 10#$1 >= 1 && 10#$1 <= 65535 )); then
+          exec ${lib.getExe codexSessionUsage} start --port "$1"
+        fi
+
+        printf '%s\n' 'Port must be an integer between 1 and 65535.' >&2
+        exit 2
+      '';
+    };
+
+    "vicinae/scripts/codex-session-usage/stop" = {
+      executable = true;
+      text = ''
+        #!${lib.getExe pkgs.bash}
+        # @vicinae.schemaVersion 1
+        # @vicinae.title Stop Codex Session Usage
+        # @vicinae.description Stop the local Codex session usage dashboard
+        # @vicinae.mode compact
+        # @vicinae.icon 📊
+
+        exec ${lib.getExe codexSessionUsage} stop
+      '';
+    };
+  };
+}

modules/applications/codex/config.toml

@@ -0,0 +1,13 @@
+model = "gpt-5.6-sol"
+model_reasoning_effort = "medium"
+
+approval_policy = "on-request"
+approvals_reviewer = "auto_review"
+sandbox_mode = "workspace-write"
+web_search = "cached"
+
+[sandbox_workspace_write]
+network_access = false
+
+[projects."/home/moons/dotfiles"]
+trust_level = "trusted"

modules/applications/codex/home.nix

@@ -1,6 +1,36 @@
-{ inputs, pkgs, ... }:
 {
-  home.packages = [
-    inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.codex
-  ];
+  config,
+  inputs,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  configDirectory =
+    if config.home.preferXdgDirectories then
+      "${config.xdg.configHome}/codex"
+    else
+      "${config.home.homeDirectory}/.codex";
+  configFile = "${configDirectory}/config.toml";
+in
+{
+  programs.codex = {
+    enable = true;
+    package = inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.codex;
+
+    skills = {
+      grilling = inputs.skills + "/skills/productivity/grilling";
+    };
+  };
+
+  # Keep the repository copy as an initial value. Codex may mutate the live
+  # file between activations; each Home Manager switch resets it from here.
+  home.activation.resetCodexConfig = {
+    after = [ "writeBoundary" ];
+    before = [ ];
+    data = ''
+      ${pkgs.coreutils}/bin/mkdir -p ${lib.escapeShellArg configDirectory}
+      ${pkgs.coreutils}/bin/install -m 0600 ${./config.toml} ${lib.escapeShellArg configFile}
+    '';
+  };
 }

modules/applications/discord/home.nix

@@ -1,6 +1,15 @@
-_: {
+{
+  inputs,
+  pkgs,
+  ...
+}:
+let
+  unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.stdenv.hostPlatform.system};
+in
+{
   programs.vesktop = {
     enable = true;
+    package = unstable.vesktop;
 
     settings = {
       discordBranch = "stable";
@@ -16,6 +25,10 @@ _: {
 
       openLinksWithElectron = false;
 
+      # Keep WebRTC on the public interface selected by the default route.
+      # Secondary private interfaces can otherwise stall voice at DTLS.
+      webRTCIPHandlingPolicy = "default_public_interface_only";
+
       spellCheckLanguages = [
         "ja-JP"
         "en-US"

modules/applications/ffmpeg/home.nix

@@ -0,0 +1,4 @@
+{ pkgs, ... }:
+{
+  home.packages = [ pkgs.ffmpeg ];
+}

modules/applications/ghostty/home/nixos.nix

@@ -1,6 +1,12 @@
 { inputs, system, ... }: {
   programs.ghostty = {
-    systemd.enable = true;
+    # Labwc's Close action correctly targets one xdg-toplevel, but Ghostty's
+    # systemd service runs every window in one GTK single-instance process.
+    # If that process exits while handling the request, every Ghostty window
+    # disappears together. Keep each launcher invocation independent instead.
+    systemd.enable = false;
     package = inputs.ghostty.packages.${system}.default;
+
+    settings.gtk-single-instance = false;
   };
 }

modules/applications/handy/darwin.nix

@@ -1,8 +0,0 @@
-{
-  homebrew.casks = [ "handy" ];
-
-  launchd.agents.handy = {
-    command = "/usr/bin/open -gja Handy --args --start-hidden";
-    serviceConfig.RunAtLoad = true;
-  };
-}

modules/applications/handy/home/nixos.nix

@@ -1,74 +0,0 @@
-{
-  config,
-  inputs,
-  lib,
-  pkgs,
-  ...
-}:
-let
-  handy = inputs.handy.packages.${pkgs.stdenv.hostPlatform.system}.handy;
-  settingsFile = "${config.xdg.configHome}/com.pais.handy/settings_store.json";
-in
-{
-  home.packages = [
-    handy
-    pkgs.wtype
-  ];
-
-  # Handy has no disabled-shortcut setting. Empty bindings are rejected before
-  # registration, leaving niri and labwc as the sole owners of Ctrl+Space.
-  home.activation.disableHandyGlobalShortcuts = {
-    after = [ "writeBoundary" ];
-    before = [ ];
-    data = ''
-      settingsFile=${lib.escapeShellArg settingsFile}
-      mkdir -p "$(dirname "$settingsFile")"
-
-      if [ -f "$settingsFile" ]; then
-        ${lib.getExe pkgs.jq} \
-          '.settings.bindings.transcribe.current_binding = ""
-          | .settings.bindings.transcribe_with_post_process.current_binding = ""' \
-          "$settingsFile" > "$settingsFile.tmp"
-      else
-        ${lib.getExe pkgs.jq} -n '
-          {
-            settings: {
-              bindings: {
-                transcribe: {
-                  id: "transcribe",
-                  name: "Transcribe",
-                  description: "Converts your speech into text.",
-                  default_binding: "ctrl+space",
-                  current_binding: ""
-                },
-                transcribe_with_post_process: {
-                  id: "transcribe_with_post_process",
-                  name: "Transcribe with Post-Processing",
-                  description: "Converts your speech into text and applies AI post-processing.",
-                  default_binding: "ctrl+shift+space",
-                  current_binding: ""
-                }
-              }
-            }
-          }
-        ' > "$settingsFile.tmp"
-      fi
-
-      mv "$settingsFile.tmp" "$settingsFile"
-    '';
-  };
-
-  systemd.user.services.handy = {
-    Unit = {
-      Description = "Handy speech-to-text";
-      After = [ "graphical-session.target" ];
-      PartOf = [ "graphical-session.target" ];
-    };
-    Service = {
-      ExecStart = "${lib.getExe handy} --start-hidden";
-      Restart = "on-failure";
-      RestartSec = 5;
-    };
-    Install.WantedBy = [ "graphical-session.target" ];
-  };
-}

modules/applications/handy/meta.nix

@@ -1,3 +0,0 @@
-{
-  description = "Handy offline speech-to-text";
-}

modules/applications/huggingface-cli/home.nix

@@ -0,0 +1,4 @@
+{ pkgs, ... }:
+{
+  home.packages = [ pkgs.python314Packages.huggingface-hub ];
+}

modules/applications/labwc/home.nix

@@ -102,8 +102,6 @@ in
           (action "W-q" "Close")
           (action "W-f" "ToggleMaximize")
           (action "W-c" "Iconify")
-          (action "W-Tab" "NextWindow")
-          (action "W-S-Tab" "PreviousWindow")
           (action "W-Up" "Lower")
           (action "W-Down" "Raise")
           (action "W-Left" "NextWindow")
@@ -123,14 +121,13 @@ in
           (execute "W-s" "noctalia msg panel-toggle launcher")
           (execute "W-e" "nautilus --new-window")
           (execute "W-l" "loginctl lock-session")
-          (execute "W-v" "vicinae vicinae://launch/clipboard/history?toggle=true")
+          (execute "W-v" "vicinae vicinae://launch/clipboard/history")
           (execute "W-j" "nani-translate-primary")
-          (execute "W-S-j" "normcap-translate")
+          (execute "W-S-j" "nani-translate-ocr")
           (execute "W-C-j" "${lib.getExe' pkgs.xdg-utils "xdg-open"} naniapp://translate")
           (execute "W-space" "ghostty +toggle-quick-terminal")
           (execute "W-p" "wdisplays")
           (execute "W-z" "wl-find-cursor -c 0xCCFF453A -s 160 -d 1200")
-          (execute "C-space" "handy --toggle-transcription")
 
           # Function keys (sync with niri modules/applications/niri/home.nix)
           (execute "XF86AudioRaiseVolume" "noctalia msg volume-up")

modules/applications/labwc/nixos.nix

@@ -6,16 +6,11 @@
 }:
 let
   unstable = inputs.nixpkgs-unstable.legacyPackages.${pkgs.stdenv.hostPlatform.system};
-  labwc = unstable.labwc.overrideAttrs (oldAttrs: {
-    patches = (oldAttrs.patches or [ ]) ++ [
-      ./patches/remove-ext-workspace-output-on-destroy.patch
-    ];
-  });
 in
 {
   programs.labwc = {
     enable = true;
-    package = labwc;
+    package = unstable.labwc;
   };
 
   xdg.portal.config.labwc.default = [

modules/applications/labwc/patches/remove-ext-workspace-output-on-destroy.patch

@@ -1,28 +0,0 @@
-From: Codex <[email protected]>
-Subject: [PATCH] output: remove destroyed output from ext-workspace group
-
-The DRM backend destroys and recreates outputs when a session is paused and
-resumed. Remove the output from the ext-workspace group before wlroots
-finishes it, otherwise the group's output_bind listener remains attached and
-wlr_output_finish() aborts.
-
----
- src/output.c | 3 +++
- 1 file changed, 3 insertions(+)
-
-diff --git a/src/output.c b/src/output.c
-index 2eab8ec..f19c3ff 100644
---- a/src/output.c
-+++ b/src/output.c
-@@ -277,6 +277,9 @@ handle_output_destroy(struct wl_listener *listener, void *data)
- 	struct seat *seat = &server.seat;
- 	regions_evacuate_output(output);
- 	regions_destroy(seat, &output->regions);
-+	wlr_ext_workspace_group_handle_v1_output_leave(
-+		server.workspaces.ext_group, output->wlr_output);
-+
- 	if (seat->overlay.active.output == output) {
- 		overlay_finish(seat);
- 	}
--- 
-2.51.0

modules/applications/linux-wallpaperengine/home/controller.sh

@@ -1,167 +0,0 @@
-# shellcheck shell=bash
-
-set -o errexit -o nounset -o pipefail
-
-playlist_file="$1"
-default_id="$2"
-configuration_id="$3"
-shift 3
-
-state_dir="${XDG_RUNTIME_DIR:?}/linux-wallpaperengine"
-state_file="$state_dir/current"
-
-usage() {
-  printf '%s\n' \
-    'Usage: wallpaperengine-wallpaper COMMAND [ID]' \
-    '' \
-    'Commands:' \
-    '  select ID Select a declaratively configured ID for this session' \
-    '  next      Select the next configured ID' \
-    '  previous  Select the previous configured ID' \
-    '  list      List configured IDs and mark the selected one' \
-    '  current   Print the selected ID' \
-    '  restart   Restart the selected wallpaper' \
-    '  stop      Stop Wallpaper Engine for this session'
-}
-
-load_playlist() {
-  mapfile -t wallpaper_ids < <(awk '/^[0-9]+$/ && !seen[$0]++' "$playlist_file")
-  if [ "${#wallpaper_ids[@]}" -eq 0 ]; then
-    echo "wallpaperengine-wallpaper: no wallpaper IDs are configured in settings.nix" >&2
-    exit 1
-  fi
-}
-
-contains_id() {
-  local candidate="$1"
-  local id
-
-  for id in "${wallpaper_ids[@]}"; do
-    [ "$id" = "$candidate" ] && return 0
-  done
-  return 1
-}
-
-current_id() {
-  local saved_configuration=""
-  local saved_id=""
-  local -a saved_state=()
-
-  if [ -s "$state_file" ]; then
-    mapfile -t saved_state <"$state_file"
-    saved_configuration="${saved_state[0]:-}"
-    saved_id="${saved_state[1]:-}"
-  fi
-
-  if [ "$saved_configuration" = "$configuration_id" ] && contains_id "$saved_id"; then
-    printf '%s\n' "$saved_id"
-  else
-    printf '%s\n' "$default_id"
-  fi
-}
-
-select_id() {
-  local id="$1"
-
-  if ! contains_id "$id"; then
-    echo "wallpaperengine-wallpaper: ID is not declared in settings.nix: $id" >&2
-    exit 2
-  fi
-
-  mkdir -p "$state_dir"
-  printf '%s\n%s\n' "$configuration_id" "$id" >"$state_file"
-  systemctl --user restart linux-wallpaperengine.service
-}
-
-cycle() {
-  local step="$1"
-  local current
-  local index=0
-  local next_index
-
-  current=$(current_id)
-  for i in "${!wallpaper_ids[@]}"; do
-    if [ "${wallpaper_ids[$i]}" = "$current" ]; then
-      index="$i"
-      break
-    fi
-  done
-
-  next_index=$(((index + step + ${#wallpaper_ids[@]}) % ${#wallpaper_ids[@]}))
-  select_id "${wallpaper_ids[$next_index]}"
-}
-
-load_playlist
-
-command="${1:-}"
-if [ -z "$command" ]; then
-  usage
-  exit 2
-fi
-shift
-
-case "$command" in
-select)
-  [ "$#" -eq 1 ] || {
-    usage >&2
-    exit 2
-  }
-  select_id "$1"
-  ;;
-next)
-  [ "$#" -eq 0 ] || {
-    usage >&2
-    exit 2
-  }
-  cycle 1
-  ;;
-previous)
-  [ "$#" -eq 0 ] || {
-    usage >&2
-    exit 2
-  }
-  cycle -1
-  ;;
-list)
-  [ "$#" -eq 0 ] || {
-    usage >&2
-    exit 2
-  }
-  current=$(current_id)
-  for id in "${wallpaper_ids[@]}"; do
-    if [ "$id" = "$current" ]; then
-      printf '* %s\n' "$id"
-    else
-      printf '  %s\n' "$id"
-    fi
-  done
-  ;;
-current)
-  [ "$#" -eq 0 ] || {
-    usage >&2
-    exit 2
-  }
-  current_id
-  ;;
-restart)
-  [ "$#" -eq 0 ] || {
-    usage >&2
-    exit 2
-  }
-  systemctl --user restart linux-wallpaperengine.service
-  ;;
-stop)
-  [ "$#" -eq 0 ] || {
-    usage >&2
-    exit 2
-  }
-  systemctl --user stop linux-wallpaperengine.service
-  ;;
-help | -h | --help)
-  usage
-  ;;
-*)
-  usage >&2
-  exit 2
-  ;;
-esac

modules/applications/linux-wallpaperengine/home/launcher.sh

@@ -1,57 +0,0 @@
-# shellcheck shell=bash
-
-set -o errexit -o nounset -o pipefail
-
-playlist_file="$1"
-default_id="$2"
-configuration_id="$3"
-assets_dir="$4"
-workshop_dir="$5"
-scaling="$6"
-shift 6
-
-state_file="${XDG_RUNTIME_DIR:?}/linux-wallpaperengine/current"
-wallpaper_id="$default_id"
-saved_configuration=""
-saved_id=""
-saved_state=()
-outputs=()
-
-if [ -s "$state_file" ]; then
-  mapfile -t saved_state <"$state_file"
-  saved_configuration="${saved_state[0]:-}"
-  saved_id="${saved_state[1]:-}"
-
-  if [ "$saved_configuration" = "$configuration_id" ] &&
-    awk -v id="$saved_id" '$0 == id { found = 1 } END { exit !found }' "$playlist_file"; then
-    wallpaper_id="$saved_id"
-  fi
-fi
-
-wallpaper_path="$workshop_dir/$wallpaper_id"
-if [ ! -d "$wallpaper_path" ]; then
-  echo "linux-wallpaperengine: missing declared wallpaper: $wallpaper_path" >&2
-  exit 1
-fi
-
-if [ ! -d "$assets_dir" ]; then
-  echo "linux-wallpaperengine: missing Wallpaper Engine assets: $assets_dir" >&2
-  exit 1
-fi
-
-mapfile -t outputs < <(wlr-randr --json | jq -r '.[] | select(.enabled == true) | .name')
-if [ "${#outputs[@]}" -eq 0 ]; then
-  echo "linux-wallpaperengine: no enabled Wayland outputs were detected" >&2
-  exit 1
-fi
-
-engine_args=("$@" --assets-dir "$assets_dir")
-for output in "${outputs[@]}"; do
-  engine_args+=(
-    --screen-root "$output"
-    --bg "$wallpaper_path"
-    --scaling "$scaling"
-  )
-done
-
-exec linux-wallpaperengine "${engine_args[@]}"

modules/applications/linux-wallpaperengine/home/nixos.nix

@@ -1,158 +0,0 @@
-{
-  config,
-  lib,
-  pkgs,
-  ...
-}:
-let
-  settings = import ../settings.nix;
-  inherit (settings)
-    assetsDirectory
-    fps
-    mute
-    scaling
-    selectedWallpaperId
-    switchIntervalSeconds
-    wallpaperIds
-    workshopDirectory
-    ;
-
-  resolveHomePath =
-    path:
-    if lib.hasPrefix "~/" path then
-      "${config.home.homeDirectory}/${lib.removePrefix "~/" path}"
-    else if lib.hasPrefix "/" path then
-      path
-    else
-      "${config.home.homeDirectory}/${path}";
-
-  hasWallpapers = wallpaperIds != [ ];
-  defaultWallpaperId =
-    if selectedWallpaperId != null then
-      selectedWallpaperId
-    else if hasWallpapers then
-      lib.head wallpaperIds
-    else
-      "";
-  configurationId = builtins.hashString "sha256" (builtins.toJSON settings);
-  resolvedAssetsDirectory = resolveHomePath assetsDirectory;
-  resolvedWorkshopDirectory = resolveHomePath workshopDirectory;
-  playlist = pkgs.writeText "linux-wallpaperengine-playlist" (
-    lib.concatMapStringsSep "\n" (id: id) wallpaperIds + "\n"
-  );
-  engineArguments = lib.optional mute "--silent" ++ [
-    "--fps"
-    (toString fps)
-  ];
-
-  controller = pkgs.writeShellApplication {
-    name = "wallpaperengine-wallpaper";
-    runtimeInputs = [
-      pkgs.coreutils
-      pkgs.gawk
-      pkgs.systemd
-    ];
-    text = ''
-      exec ${lib.getExe pkgs.bash} ${./controller.sh} \
-        ${lib.escapeShellArg playlist} \
-        ${lib.escapeShellArg defaultWallpaperId} \
-        ${lib.escapeShellArg configurationId} \
-        "$@"
-    '';
-  };
-
-  launcher = pkgs.writeShellApplication {
-    name = "linux-wallpaperengine-launcher";
-    runtimeInputs = [
-      pkgs.coreutils
-      pkgs.gawk
-      pkgs.jq
-      pkgs.linux-wallpaperengine
-      pkgs.wlr-randr
-    ];
-    text = ''
-      exec ${lib.getExe pkgs.bash} ${./launcher.sh} \
-        ${lib.escapeShellArg playlist} \
-        ${lib.escapeShellArg defaultWallpaperId} \
-        ${lib.escapeShellArg configurationId} \
-        ${lib.escapeShellArg resolvedAssetsDirectory} \
-        ${lib.escapeShellArg resolvedWorkshopDirectory} \
-        ${lib.escapeShellArg scaling} \
-        ${lib.escapeShellArgs engineArguments}
-    '';
-  };
-in
-assert lib.assertMsg (lib.all (
-  id: builtins.isString id && builtins.match "[0-9]+" id != null
-) wallpaperIds) "linux-wallpaperengine: wallpaperIds must contain only numeric strings";
-assert lib.assertMsg (
-  lib.unique wallpaperIds == wallpaperIds
-) "linux-wallpaperengine: wallpaperIds must not contain duplicates";
-assert lib.assertMsg (
-  selectedWallpaperId == null || builtins.elem selectedWallpaperId wallpaperIds
-) "linux-wallpaperengine: selectedWallpaperId must be null or a member of wallpaperIds";
-assert lib.assertMsg (
-  switchIntervalSeconds == null || (builtins.isInt switchIntervalSeconds && switchIntervalSeconds > 0)
-) "linux-wallpaperengine: switchIntervalSeconds must be null or a positive integer";
-assert lib.assertMsg (
-  builtins.isInt fps && fps > 0
-) "linux-wallpaperengine: fps must be a positive integer";
-assert lib.assertMsg (
-  builtins.isString assetsDirectory && assetsDirectory != ""
-) "linux-wallpaperengine: assetsDirectory must be a non-empty string";
-assert lib.assertMsg (
-  builtins.isString workshopDirectory && workshopDirectory != ""
-) "linux-wallpaperengine: workshopDirectory must be a non-empty string";
-assert lib.assertMsg (builtins.elem scaling [
-  "default"
-  "fill"
-  "fit"
-  "stretch"
-]) "linux-wallpaperengine: scaling must be default, fill, fit, or stretch";
-{
-  home.packages = [
-    controller
-    pkgs.linux-wallpaperengine
-  ];
-
-  systemd.user.services = lib.optionalAttrs hasWallpapers {
-    linux-wallpaperengine = {
-      Unit = {
-        Description = "Linux Wallpaper Engine";
-        After = [ "graphical-session.target" ];
-        PartOf = [ "graphical-session.target" ];
-      };
-      Service = {
-        ExecStart = lib.getExe launcher;
-        Restart = "on-abnormal";
-      };
-      Install.WantedBy = [ "graphical-session.target" ];
-    };
-
-    linux-wallpaperengine-switch = {
-      Unit.Description = "Switch Linux Wallpaper Engine wallpaper";
-      Service = {
-        Type = "oneshot";
-        ExecStart = "${lib.getExe controller} next";
-      };
-    };
-  };
-
-  systemd.user.timers =
-    lib.optionalAttrs
-      (hasWallpapers && builtins.length wallpaperIds > 1 && switchIntervalSeconds != null)
-      {
-        linux-wallpaperengine-switch = {
-          Unit = {
-            Description = "Periodically switch Linux Wallpaper Engine wallpaper";
-            PartOf = [ "graphical-session.target" ];
-          };
-          Timer = {
-            OnActiveSec = "${toString switchIntervalSeconds}s";
-            OnUnitActiveSec = "${toString switchIntervalSeconds}s";
-            Unit = "linux-wallpaperengine-switch.service";
-          };
-          Install.WantedBy = [ "graphical-session.target" ];
-        };
-      };
-}

modules/applications/linux-wallpaperengine/meta.nix

@@ -1,3 +0,0 @@
-{
-  description = "Wallpaper Engine backgrounds for Linux";
-}

modules/applications/linux-wallpaperengine/settings.nix

@@ -1,23 +0,0 @@
-{
-  assetsDirectory = "~/.local/share/Steam/steamapps/common/wallpaper_engine/assets";
-  workshopDirectory = "~/.local/share/Steam/steamapps/workshop/content/431960";
-
-  wallpaperIds = [
-    "2833810156"
-    "2834355367"
-    "2836628501"
-    "2845095254"
-    "2859848175"
-    "2861661119"
-    "2982896307"
-  ];
-
-  # null selects the first ID above.
-  selectedWallpaperId = null;
-  # Set a number such as 300 to rotate through multiple IDs.
-  switchIntervalSeconds = 300;
-
-  fps = 30;
-  mute = true;
-  scaling = "fill";
-}

modules/applications/nani/home/nixos.nix

@@ -1,5 +1,78 @@
-_: {
+{ pkgs, ... }:
+let
+  tessdataBest = pkgs.runCommand "tessdata-best-jpn-eng-chi-sim" { } ''
+    mkdir -p "$out"
+    ln -s ${
+      pkgs.fetchurl {
+        url = "https://github.com/tesseract-ocr/tessdata_best/raw/main/jpn.traineddata";
+        hash = "sha256-Nr35rII/WRHmJMMNBVPokLirx8MaZbPvFNqUNljEC3k=";
+      }
+    } "$out/jpn.traineddata"
+    ln -s ${
+      pkgs.fetchurl {
+        url = "https://github.com/tesseract-ocr/tessdata_best/raw/main/eng.traineddata";
+        hash = "sha256-goCu0Hgv4nJXpo6hD+fvMkyg+Nhb0v0UXRwrVgvLZro=";
+      }
+    } "$out/eng.traineddata"
+    ln -s ${
+      pkgs.fetchurl {
+        url = "https://github.com/tesseract-ocr/tessdata_best/raw/main/chi_sim.traineddata";
+        hash = "sha256-T+8tEwbI6HYW1NPkxsZ/r11EvjNCKQz48vD246p+c1s=";
+      }
+    } "$out/chi_sim.traineddata"
+  '';
+
+  tesseract = pkgs.tesseract5.override {
+    tessdata = tessdataBest;
+  };
+
+  naniTranslatePrimary = pkgs.writeShellApplication {
+    name = "nani-translate-primary";
+
+    runtimeInputs = with pkgs; [
+      jq
+      wl-clipboard
+      xdg-utils
+    ];
+
+    text = ''
+      selected_text="$(wl-paste --primary --no-newline)" || exit 0
+      [ -n "$selected_text" ] || exit 0
+      encoded_text="$(printf '%s' "$selected_text" | jq -sRr @uri)"
+      exec xdg-open "naniapp://translate?source=$encoded_text"
+    '';
+  };
+
+  naniTranslateOcr = pkgs.writeShellApplication {
+    name = "nani-translate-ocr";
+
+    runtimeInputs = with pkgs; [
+      grim
+      jq
+      slurp
+      tesseract
+      xdg-utils
+    ];
+
+    text = ''
+      geometry="$(slurp)" || exit 0
+      captured_text="$(
+        grim -g "$geometry" - \
+          | tesseract stdin stdout -l jpn+eng+chi_sim --oem 1 --psm 6
+      )"
+      [ -n "$captured_text" ] || exit 0
+      encoded_text="$(printf '%s' "$captured_text" | jq -sRr @uri)"
+      exec xdg-open "naniapp://translate?source=$encoded_text"
+    '';
+  };
+in
+{
   programs.naniTranslateLinux.enable = true;
 
   xdg.mimeApps.defaultApplications."x-scheme-handler/naniapp" = "nani.desktop";
+
+  home.packages = [
+    naniTranslatePrimary
+    naniTranslateOcr
+  ];
 }

modules/applications/nautilus/home/nixos.nix

@@ -162,14 +162,6 @@ in
     "file://${config.home.homeDirectory}/Desktop Desktop"
     "file://${config.home.homeDirectory}/Pictures Pictures"
     "file://${config.home.homeDirectory}/Downloads Downloads"
-    "file://${config.home.homeDirectory}/projects projects"
+    "file://${config.home.homeDirectory}/Projects Projects"
   ];
-
-  home.activation.createProjectsDirectory = {
-    after = [ "writeBoundary" ];
-    before = [ ];
-    data = ''
-      $DRY_RUN_CMD mkdir -p "$HOME/projects"
-    '';
-  };
 }

modules/applications/niri/home/nixos.nix

@@ -1,28 +1,14 @@
 { lib, pkgs, ... }:
 let
   keybindings = import ./keybindings.nix;
-  naniTranslatePrimary = pkgs.writeShellApplication {
-    name = "nani-translate-primary";
-    runtimeInputs = with pkgs; [
-      jq
-      wl-clipboard
-      xdg-utils
-    ];
-    text = ''
-      selected_text="$(wl-paste --primary --no-newline)" || exit 0
-      [ -n "$selected_text" ] || exit 0
-      encoded_text="$(printf '%s' "$selected_text" | jq -sRr @uri)"
-      exec xdg-open "naniapp://translate?source=$encoded_text"
-    '';
-  };
 in
 {
-  home.packages = [ naniTranslatePrimary ];
-
   programs.niri.settings = {
 
     binds = keybindings // {
       # niri window or focus move
+      "Mod+MouseMiddle".action.toggle-window-floating = [ ];
+
       "Mod+Shift+Left" = {
         action.focus-monitor-left = [ ];
         hotkey-overlay.title = "Focus Monitor Left";
@@ -40,6 +26,18 @@ in
         hotkey-overlay.title = "Focus Monitor Down";
       };
 
+      # Use the modifier combinations in the opposite direction from Niri's defaults.
+      "Mod+WheelScrollDown".action.focus-column-right = [ ];
+      "Mod+WheelScrollUp".action.focus-column-left = [ ];
+      "Mod+Shift+WheelScrollDown" = {
+        cooldown-ms = 150;
+        action.focus-workspace-down = [ ];
+      };
+      "Mod+Shift+WheelScrollUp" = {
+        cooldown-ms = 150;
+        action.focus-workspace-up = [ ];
+      };
+
       "Mod+Shift+Ctrl+Left" = {
         action.move-window-to-monitor-left = [ ];
         hotkey-overlay.title = "Move Window to Monitor Left";
@@ -108,7 +106,7 @@ in
       "Mod+V" = {
         action.spawn = [
           "vicinae"
-          "vicinae://launch/clipboard/history?toggle=true"
+          "vicinae://launch/clipboard/history"
         ];
         hotkey-overlay.title = "Clipboard History";
       };
@@ -119,7 +117,7 @@ in
       };
       "Mod+Shift+J" = {
         repeat = false;
-        action.spawn = [ "normcap-translate" ];
+        action.spawn = [ "nani-translate-ocr" ];
         hotkey-overlay.title = "OCR and Translate with Nani";
       };
       "Mod+Ctrl+J" = {
@@ -153,13 +151,6 @@ in
         ];
         hotkey-overlay.title = "Find Cursor";
       };
-      "Ctrl+Space" = {
-        action.spawn = [
-          "handy"
-          "--toggle-transcription"
-        ];
-        hotkey-overlay.title = "Toggle Handy Transcription";
-      };
 
       # Function keys (sync with labwc modules/applications/labwc/home.nix)
       "XF86AudioRaiseVolume".action.spawn = [

modules/applications/nix-fleet/meta.nix

@@ -0,0 +1,3 @@
+{
+  description = "Fleet build and deploy command-line tools";
+}

modules/applications/nix-fleet/nixos.nix

@@ -0,0 +1,63 @@
+{
+  inputs,
+  pkgs,
+  primaryUser,
+  ...
+}:
+let
+  system = pkgs.stdenv.hostPlatform.system;
+  deployRs = inputs.deploy-rs.packages.${system}.default;
+
+  fleetBuild = pkgs.writeShellApplication {
+    name = "fleet-build";
+    runtimeInputs = [
+      pkgs.jq
+      pkgs.nix
+    ];
+    text = ''
+      flake_ref="''${FLAKE:-/home/${primaryUser}/dotfiles}"
+
+      if (( $# == 0 )); then
+        # Keep this pipeline inside command substitution so pipefail and
+        # writeShellApplication's errexit propagate evaluation failures.
+        host_lines="$(
+          nix eval --json "$flake_ref#nixosConfigurations" \
+            --apply 'configs: builtins.attrNames configs' |
+            jq -r '.[] | select(. != "installer")'
+        )"
+        if [[ -z "$host_lines" ]]; then
+          echo "No deployable NixOS hosts found in $flake_ref" >&2
+          exit 1
+        fi
+        mapfile -t hosts <<< "$host_lines"
+      else
+        hosts=("$@")
+      fi
+
+      for host in "''${hosts[@]}"; do
+        nix build \
+          --out-link "/var/lib/nix-fleet/roots/build/$host" \
+          "$flake_ref#nixosConfigurations.$host.config.system.build.toplevel"
+      done
+    '';
+  };
+
+  fleetDeploy = pkgs.writeShellApplication {
+    name = "fleet-deploy";
+    runtimeInputs = [ deployRs ];
+    text = ''
+      cd "''${FLAKE:-/home/${primaryUser}/dotfiles}" || exit 1
+
+      exec deploy \
+        --keep-result \
+        --result-path /var/lib/nix-fleet/roots/deploy \
+        "$@"
+    '';
+  };
+in
+{
+  environment.systemPackages = [
+    fleetBuild
+    fleetDeploy
+  ];
+}

modules/applications/noctalia/codexbar.nix

@@ -1,6 +1,6 @@
 { lib, pkgs }:
 let
-  version = "0.46.0";
+  version = "0.56.0";
   architecture =
     if pkgs.stdenv.hostPlatform.isx86_64 then
       "x86_64"
@@ -10,8 +10,8 @@ let
       throw "CodexBar CLI is only packaged for x86_64-linux and aarch64-linux";
   hash =
     {
-      x86_64 = "sha256-yMrOpu1WIv2sGVgvY9qf2XCoX2AXMSqR2b8bQDRU6os=";
-      aarch64 = "sha256-pCp3NOlxFN6zeH67W04WGSPbUae+ktzR5vEunWqu00g=";
+      x86_64 = "sha256-hzCnAyiizm8ZDfE1ONEP6S2Pdnskclm+XdDBBhEYVqE=";
+      aarch64 = "sha256-vfcgDEFpORPymcRYmlqvsjhV4pU7lNC8Vd9FDPI9UjM=";
     }
     .${architecture};
 in

modules/applications/noctalia/home.nix

@@ -13,14 +13,6 @@ let
       --replace-fail "@codexbarPath@" "${lib.getExe codexbar}"
   '';
 
-  noctaliaPatched =
-    inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default.overrideAttrs
-      (oldAttrs: {
-        patches = (oldAttrs.patches or [ ]) ++ [
-          ./patches/window-switcher-labwc.patch
-        ];
-      });
-
   wallpapers = pkgs.fetchFromGitHub {
     owner = "moons-14";
     repo = "wallpapers";
@@ -50,7 +42,7 @@ in
   programs.noctalia = {
     enable = true;
 
-    package = noctaliaPatched;
+    package = inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default;
 
     systemd.enable = true;
 
@@ -165,7 +157,7 @@ in
         network-connection = {
           type = "custom_button";
           glyph = "access-point";
-          actions.left = "nm-connection-editor";
+          actions.left = "exec nm-connection-editor";
         };
         tray = {
           type = "tray";
@@ -186,7 +178,7 @@ in
             "google-chrome"
             "code"
             "dev.zed.Zed"
-            "codex-desktop"
+            "chatgpt"
             "vesktop"
           ];
           show_all_outputs = true;

modules/applications/noctalia/patches/taskbar-overview-hook.patch

@@ -1,43 +0,0 @@
-diff --git a/src/shell/bar/widgets/taskbar_widget.cpp b/src/shell/bar/widgets/taskbar_widget.cpp
---- a/src/shell/bar/widgets/taskbar_widget.cpp
-+++ b/src/shell/bar/widgets/taskbar_widget.cpp
-@@ -5,6 +5,7 @@
- #include "compositors/workspace_backend.h"
- #include "config/config_service.h"
- #include "core/deferred_call.h"
-+#include "core/process/process.h"
- #include "i18n/i18n.h"
- #include "render/core/color.h"
- #include "render/core/renderer.h"
-@@ -36,6 +37,18 @@
- 
- namespace {
- 
-+  [[nodiscard]] bool launchTaskbarOverview(const std::string& appId) {
-+    constexpr const char* command = "noctalia-taskbar-overview";
-+    if (appId.empty() || !process::commandExists(command)) {
-+      return false;
-+    }
-+    return process::runAsync({
-+        command,
-+        "--app-id",
-+        appId.c_str(),
-+    });
-+  }
-+
-   // Integer centering; optional odd spare pixel on the end side (right/bottom).
-   [[nodiscard]] float centeredOffset(float extent, float content, float inset = 0.0F, bool oddSpareOnEnd = true) {
-     const float inner = std::max(0.0F, extent - inset * 2.0F);
-@@ -373,6 +386,12 @@ void TaskbarWidget::activateOrLaunchPinned(const TaskModel& task) {
-     return;
-   }
- 
-+  const std::string overviewAppId =
-+      !task.appId.empty() ? task.appId : (!task.desktopEntryId.empty() ? task.desktopEntryId : task.idLower);
-+  if (launchTaskbarOverview(overviewAppId)) {
-+    return;
-+  }
-+
-   const std::string cycleKey = !task.desktopEntryId.empty() ? task.desktopEntryId : task.idLower;
-   std::size_t& cursor = m_groupedAppCycleCursor[cycleKey];
-   if (cursor >= windows.size()) {

modules/applications/noctalia/patches/window-switcher-labwc.patch

@@ -1,26 +0,0 @@
-diff --git a/src/shell/switcher/window_switcher.cpp b/src/shell/switcher/window_switcher.cpp
---- a/src/shell/switcher/window_switcher.cpp
-+++ b/src/shell/switcher/window_switcher.cpp
-@@ -286,12 +286,19 @@ indexLiveToplevelsByWindowId(const CompositorPlatform& platform, std::unordered_
-           continue;
-         }
- 
--        const auto mappedId = platform.compositorWindowIdForToplevelInfo(info);
--        if (!mappedId.has_value() || mappedId->empty()) {
--          continue;
-+        std::string key;
-+        if (const auto mappedId = platform.compositorWindowIdForToplevelInfo(info);
-+            mappedId.has_value() && !mappedId->empty()) {
-+          key = canonicalWindowId(*mappedId);
-         }
--        const std::string key = canonicalWindowId(*mappedId);
-+
-+        // Generic wlroots compositors such as labwc do not provide a
-+        // compositor-specific window ID. The wlr toplevel handle is stable
-+        // for the lifetime of the window and is sufficient for switcher identity.
-+        if (key.empty() && wlrHandle != 0) {
-+          key = "toplevel:" + std::to_string(wlrHandle);
-+        }
-         if (key.empty()) {
-           continue;
-         }

modules/applications/normcap/home/nixos.nix

@@ -1,44 +0,0 @@
-{ pkgs, ... }:
-let
-  normcap = pkgs.normcap.override {
-    tesseract4 = pkgs.tesseract4.override {
-      enableLanguages = [
-        "chi_sim"
-        "jpn"
-        "eng"
-      ];
-    };
-  };
-
-  normcapTranslate = pkgs.writeShellApplication {
-    name = "normcap-translate";
-
-    runtimeInputs = [
-      normcap
-      pkgs.jq
-      pkgs.xdg-utils
-    ];
-
-    text = ''
-      captured_text="$(
-        normcap \
-          --cli-mode \
-          --screenshot-handler grim \
-          --show-introduction False \
-          --update False \
-          --detect-codes False \
-          --notification False \
-          -l jpn eng chi_sim
-      )" || exit 0
-      [ -n "$captured_text" ] || exit 0
-      encoded_text="$(printf '%s' "$captured_text" | jq -sRr @uri)"
-      exec xdg-open "naniapp://translate?source=$encoded_text"
-    '';
-  };
-in
-{
-  home.packages = [
-    normcap
-    normcapTranslate
-  ];
-}

modules/applications/normcap/meta.nix

@@ -1,7 +0,0 @@
-{
-  description = "NormCap OCR screen capture";
-
-  includes = [
-    "applications.nani"
-  ];
-}

modules/applications/opencode/home.nix

@@ -2,5 +2,19 @@
 {
   home.packages = [
     inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.opencode
+    inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.oh-my-opencode
   ];
+
+  home.file.".omo/omo.jsonc".text = builtins.toJSON {
+    agents = {
+      sisyphus.model = "openai/gpt-5.6-sol";
+      hephaestus.model = "openai/gpt-5.6-terra";
+      prometheus.model = "openai/gpt-5.6-terra";
+      oracle.model = "openai/gpt-5.6-terra";
+      momus.model = "openai/gpt-5.6-terra";
+      librarian.model = "openai/gpt-5.6-luna";
+      explore.model = "openai/gpt-5.6-luna";
+      atlas.model = "openai/gpt-5.6-luna";
+    };
+  };
 }

modules/applications/ssh/home/common.nix

@@ -24,6 +24,9 @@ lib.mkMerge [
       };
 
       extraConfig = ''
+        Match exec "test -n \"$SSH_AUTH_SOCK\" && test -S \"$SSH_AUTH_SOCK\""
+          IdentityAgent $SSH_AUTH_SOCK
+
         Match exec "test -S %d/.1password/agent.sock"
           IdentityAgent %d/.1password/agent.sock
       '';

modules/applications/vicinae/home/common.nix

@@ -10,6 +10,8 @@ in
   programs.vicinae = {
     enable = true;
 
+    enableChromeIntegration = false;
+
     settings = {
       font.size = 11;
       close_on_focus_loss = true;

modules/applications/vicinae/home/nixos.nix

@@ -8,9 +8,6 @@ let
 in
 {
   programs.vicinae = {
-
-    package = pkgs.vicinae;
-
     systemd = {
       enable = true;
       autoStart = true;

modules/applications/xcode/darwin.nix

@@ -0,0 +1,8 @@
+{
+  homebrew = {
+    enable = true;
+    masApps = {
+      Xcode = 497799835;
+    };
+  };
+}

modules/applications/yt-dlp/home.nix

@@ -0,0 +1,4 @@
+{ pkgs, ... }:
+{
+  home.packages = [ pkgs.yt-dlp ];
+}

modules/applications/zed/home.nix

@@ -4,8 +4,11 @@
     extensions = [
       "catppuccin"
       "nix"
+      "dockerfile"
     ];
     mutableUserSettings = false;
+    mutableUserKeymaps = false;
+    userKeymaps = import ./keymaps.nix;
 
     userSettings = {
       agent = {
@@ -36,6 +39,9 @@
         light = "Catppuccin Latte";
         dark = "Catppuccin Mocha";
       };
+      edit_predictions = {
+        provider = "copilot";
+      };
     };
   };
 }

modules/applications/zed/keymaps.nix

@@ -0,0 +1,38 @@
+[
+  {
+    context = "Editor && vim_mode == normal";
+    bindings = {
+      # This selected native-equivalent subset preserves Zed's Vim defaults for
+      # K, gd, grr, gri, gra, gO, ]d, [d, zM, zR, [b, and ]b.
+      "g r t" = "editor::GoToTypeDefinition";
+      "space space" = "pane::AlternateFile";
+      "space r n" = "editor::Rename";
+      "space c a" = "editor::ToggleCodeActions";
+      "space c f" = "editor::Format";
+      "space d l" = "editor::Hover";
+      "space e" = "project_panel::Toggle";
+      "space t t" = "terminal_panel::Toggle";
+      "space b c" = "pane::CloseActiveItem";
+      "space f f" = "file_finder::Toggle";
+      "space f g" = "pane::DeploySearch";
+      "space f b" = "tab_switcher::ToggleAll";
+      "space f s" = "outline::Toggle";
+      "space f shift-s" = "project_symbols::Toggle";
+      "space x x" = "diagnostics::Deploy";
+    };
+  }
+  {
+    # Keep normal-mode editor navigation out of terminals and other panels.
+    context = "Editor && vim_mode == normal && !menu";
+    bindings = {
+      "ctrl-h" = "workspace::ActivatePaneLeft";
+      "ctrl-j" = "workspace::ActivatePaneDown";
+      "ctrl-k" = "workspace::ActivatePaneUp";
+      "ctrl-l" = "workspace::ActivatePaneRight";
+      "ctrl-left" = "workspace::ActivatePaneLeft";
+      "ctrl-down" = "workspace::ActivatePaneDown";
+      "ctrl-up" = "workspace::ActivatePaneUp";
+      "ctrl-right" = "workspace::ActivatePaneRight";
+    };
+  }
+]

modules/hardwares/nvidia/nixos.nix

@@ -5,10 +5,7 @@
     modesetting.enable = true;
     open = true;
 
-    powerManagement = {
-      enable = true;
-      kernelSuspendNotifier = true;
-    };
+    powerManagement.enable = true;
 
     moduleParams.nvidia.NVreg_TemporaryFilePath = "/var/tmp";
 

modules/profiles/README.md

@@ -38,9 +38,13 @@ required on every supported host.
 | `platform.vm`                        | UEFI QEMU NixOS guest with NFS client support |
 | `workload.development`               | NixOS, macOS with Home Manager                |
 | `workload.game`                      | NixOS, macOS                                  |
+| `workload.machine-learning`          | NixOS with Home Manager                       |
+| `workload.nix-builder`               | NixOS central build and binary-cache VM       |
 | `workload.personal`                  | NixOS, macOS with Home Manager                |
 | `workload.remote-access`             | NixOS, macOS                                  |
+| `workload.camera`                    | NixOS                                         |
 | `workload.server`                    | NixOS, macOS with Home Manager                |
+| `networking.homelab-cache-client`    | NixOS, macOS with access to nix-builder       |
 | `networking.tailscale-client`        | NixOS, macOS                                  |
 | `networking.tailscale-subnet-router` | NixOS                                         |
 | `security.fingerprint`               | NixOS, macOS                                  |
@@ -58,18 +62,22 @@ selects labwc. A daily-use macOS development machine can combine
 `interface.macos`, `workload.development`, and `workload.personal`. Hardware
 support does not implicitly select an interface or workload.
 
+`workload.machine-learning` provides the Hugging Face Hub CLI for hosts used
+to download and publish machine learning models and datasets.
+
+`workload.nix-builder` provides the central build policy, persistent fleet GC
+roots, deploy-rs tooling, SOPS integration, and Harmonia binary cache. Network
+reachability and remote shell access remain independent host selections.
+
+`networking.homelab-cache-client` adds the internal Harmonia substituter and
+its trusted public key. It requires the public key generated during
+`hosts/nix-builder/README.md` bootstrap.
+
 `workload.personal` provides Pear Desktop on both NixOS and macOS. Home Manager
 enables performance improvements, synced lyrics, tracker blocking, the album
 color theme, and custom output-device selection while preserving user-owned
 settings such as the selected device.
 
-`workload.personal` also provides Handy for offline speech-to-text. It starts
-hidden when the graphical session begins. On niri and labwc, `Ctrl+Space` is
-owned by the compositor and invokes Handy's `--toggle-transcription` command;
-Handy's own shortcut bindings are disabled on NixOS so it does not monitor
-keyboard events under Wayland. Handy uses the Homebrew cask and starts at login
-on macOS.
-
 `workload.personal` provides ActivityWatch for local activity tracking. On
 NixOS, its server and Wayland-compatible watcher run as Home Manager user
 services. On macOS, the Homebrew cask starts at login.

modules/profiles/interface/linux-desktop/home.nix

@@ -4,8 +4,6 @@
     pkgs.playerctl
   ];
 
-  programs.noctalia.settings.wallpaper.enabled = false;
-
   xdg.userDirs = {
     enable = true;
     createDirectories = true;
@@ -17,5 +15,6 @@
     publicShare = "$HOME/Public";
     templates = "$HOME/Templates";
     videos = "$HOME/Videos";
+    projects = "$HOME/Projects";
   };
 }

modules/profiles/interface/linux-desktop/meta.nix

@@ -11,15 +11,15 @@
     "applications.ghostty"
     "applications.gtk"
     "applications.loupe"
-    "applications.linux-wallpaperengine"
     "applications.nautilus"
-    "applications.normcap"
+    "applications.nani"
     "applications.papers"
     "applications.qalculate-gtk"
     "applications.resources"
     "applications.vlc"
     "hardwares.graphics"
     "services.gvfs"
+    "services.evremap"
     "services.polkit-gnome"
     "systems.audio"
     "systems.fonts"

modules/profiles/networking/homelab-cache-client/meta.nix

@@ -0,0 +1,5 @@
+{
+  description = "Use the homelab Harmonia binary cache";
+
+  includes = [ "systems.nix.homelab-cache" ];
+}

modules/profiles/platform/desktop/nixos.nix

@@ -3,6 +3,7 @@
   # every system sleep path; screen blanking while locked is handled by
   # services.swayidle in the graphical session.
   systemd.sleep.settings.Sleep = {
+    AllowSuspend = true;
     AllowHibernation = false;
     AllowHybridSleep = false;
     AllowSuspendThenHibernate = false;

modules/profiles/security/secrets/nixos.nix

@@ -0,0 +1,6 @@
+{
+  sops.secrets."users/moons/hashedPassword" = {
+    sopsFile = ../../../secrets/common/system.yaml;
+    neededForUsers = true;
+  };
+}

modules/profiles/workload/camera/meta.nix

@@ -0,0 +1,5 @@
+{
+  description = "Camera capture and virtual camera tools";
+
+  includes = [ "systems.boot.v4l2loopback" ];
+}

modules/profiles/workload/camera/nixos.nix

@@ -0,0 +1,8 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [
+    gphoto2
+    ffmpeg
+    v4l-utils
+  ];
+}

modules/profiles/workload/development/home.nix

@@ -4,7 +4,7 @@
     bind
     bun
     nil
-    python312
+    python314
     uv
   ];
 }

modules/profiles/workload/development/meta.nix

@@ -6,6 +6,7 @@
     "applications.claude"
     "applications.codex"
     "applications.codex-desktop"
+    "applications.codex-session-usage"
     "applications.docker"
     "applications.drawio"
     "applications.ghostty"
@@ -13,6 +14,7 @@
     "applications.java"
     "applications.opencode"
     "applications.vscode"
+    "applications.xcode"
     "applications.zed"
   ];
 }

modules/profiles/workload/machine-learning/meta.nix

@@ -0,0 +1,5 @@
+{
+  description = "Machine learning tools";
+
+  includes = [ "applications.huggingface-cli" ];
+}

modules/profiles/workload/nix-builder/meta.nix

@@ -0,0 +1,10 @@
+{
+  description = "Central Nix builder, deploy controller, and binary cache";
+
+  includes = [
+    "applications.nix-fleet"
+    "services.harmonia"
+    "systems.nix.build-server"
+    "systems.sops"
+  ];
+}

modules/profiles/workload/personal/meta.nix

@@ -6,8 +6,8 @@
     "applications.activitywatch"
     "applications.chrome"
     "applications.discord"
+    "applications.ffmpeg"
     "applications.gnome-text-editor"
-    "applications.handy"
     "applications.kde"
     "applications.moonlight"
     "applications.slack"
@@ -15,5 +15,6 @@
     "applications.obs"
     "applications.nani"
     "applications.thunderbird"
+    "applications.yt-dlp"
   ];
 }

modules/services/evremap/nixos.nix

@@ -0,0 +1,20 @@
+{
+  services.evremap = {
+    enable = true;
+
+    settings = {
+      device_name = "VXE VXE Mouse 1K Dongle Mouse";
+
+      remap = [
+        {
+          input = [ "BTN_SIDE" ];
+          output = [ "KEY_LEFTMETA" ];
+        }
+        {
+          input = [ "BTN_EXTRA" ];
+          output = [ "BTN_SIDE" ];
+        }
+      ];
+    };
+  };
+}

modules/services/harmonia/meta.nix

@@ -0,0 +1,3 @@
+{
+  description = "Harmonia binary cache backed by the local Nix store";
+}

modules/services/harmonia/nixos.nix

@@ -0,0 +1,19 @@
+let
+  signingKeyPath = "/run/secrets/harmonia/signing-key";
+in
+{
+  services.harmonia.cache = {
+    enable = true;
+    signKeyPaths = [ signingKeyPath ];
+
+    settings = {
+      bind = "0.0.0.0:5000";
+      priority = 30;
+    };
+  };
+
+  # Keep activation usable while the host-specific SOPS secret is bootstrapped.
+  # Once the secret exists, starting the socket also starts Harmonia on demand.
+  systemd.sockets.harmonia.unitConfig.ConditionPathExists = signingKeyPath;
+  systemd.services.harmonia.unitConfig.ConditionPathExists = signingKeyPath;
+}

modules/services/swayidle/home/nixos.nix

@@ -10,6 +10,8 @@ let
   brightnessState = "$XDG_RUNTIME_DIR/swayidle-brightness";
 
   onBattery = pkgs.writeShellScript "swayidle-on-battery" ''
+    [ "''${SWAYIDLE_ASSUME_AC:-0}" = 1 ] && exit 1
+
     for supply in /sys/class/power_supply/*; do
       [ -f "$supply/type" ] || continue
       [ "$(< "$supply/type")" = "Battery" ] || continue

modules/systems/audio/nixos.nix

@@ -21,29 +21,5 @@ in
     pulse.enable = true;
     jack.enable = true;
     wireplumber.enable = true;
-
-    extraConfig.pipewire."90-echo-cancel.conf" = {
-      "context.modules" = [
-        {
-          name = "libpipewire-module-echo-cancel";
-
-          args = {
-            "library.name" = "aec/libspa-aec-webrtc";
-
-            "monitor.mode" = true;
-
-            "capture.props" = {
-              "node.name" = "echo_cancel_capture";
-              "node.description" = "Echo Cancel Capture";
-            };
-
-            "source.props" = {
-              "node.name" = "echo_cancel_source";
-              "node.description" = "Echo Cancelled Microphone";
-            };
-          };
-        }
-      ];
-    };
   };
 }

modules/systems/boot/base/nixos.nix

@@ -1,6 +1,6 @@
 { pkgs, lib, ... }:
 {
   boot.loader.systemd-boot.configurationLimit = lib.mkDefault 8;
-  boot.kernelPackages = pkgs.linuxPackages_latest;
+  boot.kernelPackages = pkgs.linuxPackages;
   programs.nix-ld.enable = true;
 }

modules/systems/boot/v4l2loopback/nixos.nix

@@ -0,0 +1,10 @@
+{ config, ... }:
+{
+  boot = {
+    extraModulePackages = [ config.boot.kernelPackages.v4l2loopback ];
+    kernelModules = [ "v4l2loopback" ];
+    extraModprobeConfig = ''
+      options v4l2loopback devices=1 video_nr=42 card_label="LUMIX S9" exclusive_caps=1
+    '';
+  };
+}

modules/systems/nix/build-server/meta.nix

@@ -0,0 +1,3 @@
+{
+  description = "Central Nix build server policy and persistent fleet roots";
+}

modules/systems/nix/build-server/nixos.nix

@@ -0,0 +1,33 @@
+{ primaryUser, ... }:
+let
+  GiB = 1024 * 1024 * 1024;
+in
+{
+  nix = {
+    nrBuildUsers = 64;
+
+    settings = {
+      # Limit concurrent derivations so build scratch and memory usage remain
+      # bounded. Each derivation may still use every vCPU exposed to the VM.
+      max-jobs = 2;
+      cores = 0;
+
+      # Keep enough room for large desktop, browser, and CUDA closures.
+      min-free = 64 * GiB;
+      max-free = 128 * GiB;
+    };
+  };
+
+  systemd.services.nix-daemon.serviceConfig = {
+    MemoryAccounting = true;
+    MemoryMax = "90%";
+    OOMScoreAdjust = 500;
+  };
+
+  systemd.tmpfiles.rules = [
+    "d /var/lib/nix-fleet 0750 ${primaryUser} users - -"
+    "d /var/lib/nix-fleet/roots 0750 ${primaryUser} users - -"
+    "d /var/lib/nix-fleet/roots/build 0750 ${primaryUser} users - -"
+    "d /var/lib/nix-fleet/roots/deploy 0750 ${primaryUser} users - -"
+  ];
+}

modules/systems/nix/common.nix

@@ -7,14 +7,18 @@
       "flakes"
     ];
 
+    connect-timeout = 10;
+
     extra-substituters = [
       "https://cache.nixos.org"
       "https://nix-community.cachix.org"
       "https://moons-dotfiles.cachix.org"
       "https://noctalia.cachix.org"
       "https://vicinae.cachix.org"
+      "https://ghostty.cachix.org"
       "https://cache.numtide.com"
       "https://codex-desktop-linux.cachix.org"
+      "https://cuda-maintainers.cachix.org"
     ];
 
     extra-trusted-public-keys = [
@@ -23,8 +27,10 @@
       "moons-dotfiles.cachix.org-1:WHoroKiNScG2/dpxHHL1I0qVmvuQhJbEAP+DS2j9Rr0="
       "noctalia.cachix.org-1:pCOR47nnMEo5thcxNDtzWpOxNFQsBRglJzxWPp3dkU4="
       "vicinae.cachix.org-1:1kDrfienkGHPYbkpNj1mWTr7Fm1+zcenzgTizIcI3oc="
+      "ghostty.cachix.org-1:QB389yTa6gTyneehvqG58y0WnHjQOqgnA+wBnpWWxns="
       "niks3.numtide.com-1:DTx8wZduET09hRmMtKdQDxNNthLQETkc/yaX7M4qK0g="
       "codex-desktop-linux.cachix.org-1:nX/xy6AdK9hQE24A8ALGjkCKj2ObFmcnemiL5Cid4nk="
+      "cuda-maintainers.cachix.org-1:0dq3bujKpuEPMCX6U4WylrUDZ9JyUG0VpVZa7CNfq5E="
     ];
   };
 }

modules/systems/nix/homelab-cache/common.nix

@@ -0,0 +1,22 @@
+{ lib, ... }:
+let
+  publicKeyFile = ./public-key;
+  hasPublicKey = builtins.pathExists publicKeyFile;
+  publicKey = if hasPublicKey then lib.removeSuffix "\n" (builtins.readFile publicKeyFile) else "";
+in
+{
+  assertions = [
+    {
+      assertion = hasPublicKey;
+      message = ''
+        systems.nix.homelab-cache requires
+        modules/systems/nix/homelab-cache/public-key
+      '';
+    }
+  ];
+
+  nix.settings = lib.mkIf hasPublicKey {
+    extra-substituters = [ "http://nix-builder:5000" ];
+    extra-trusted-public-keys = [ publicKey ];
+  };
+}

modules/systems/nix/homelab-cache/meta.nix

@@ -0,0 +1,3 @@
+{
+  description = "Homelab Harmonia binary-cache client settings";
+}

modules/systems/sops/nixos.nix

@@ -1,8 +1,3 @@
 {
   services.pcscd.enable = true;
-
-  sops.secrets."users/moons/hashedPassword" = {
-    sopsFile = ../../../secrets/common/system.yaml;
-    neededForUsers = true;
-  };
 }

shells/default.nix

@@ -2,5 +2,6 @@
   imports = [
     ./dotnix.nix
     ./android.nix
+    ./ios.nix
   ];
 }

shells/ios.nix

@@ -0,0 +1,48 @@
+_: {
+  perSystem =
+    { pkgs, ... }:
+    let
+      installIosSimulator = pkgs.writeShellApplication {
+        name = "ios-simulator-install";
+        text = ''
+          if [[ "$(/usr/bin/uname -s)" != "Darwin" ]]; then
+            echo "ios-simulator-install is only supported on macOS." >&2
+            exit 1
+          fi
+
+          xcode_app="/Applications/Xcode.app"
+          developer_dir="$xcode_app/Contents/Developer"
+
+          if [[ ! -d "$developer_dir" ]]; then
+            echo "Xcode is not installed at $xcode_app." >&2
+            echo "Apply the m2 nix-darwin configuration first." >&2
+            exit 1
+          fi
+
+          current_developer_dir="$(/usr/bin/xcode-select -p 2>/dev/null || true)"
+          if [[ "$current_developer_dir" != "$developer_dir" ]]; then
+            echo "Selecting stable Xcode..."
+            /usr/bin/sudo /usr/bin/xcode-select --switch "$developer_dir"
+          fi
+
+          echo "Installing Xcode first-launch components..."
+          /usr/bin/sudo /usr/bin/xcodebuild -runFirstLaunch
+
+          echo "Checking for newer hardware support..."
+          /usr/bin/xcodebuild -runFirstLaunch -checkForNewerComponents
+
+          echo "Downloading and installing the latest iOS Simulator runtime..."
+          /usr/bin/xcodebuild -downloadPlatform iOS
+
+          echo
+          /usr/bin/xcodebuild -version
+          /usr/bin/xcrun simctl list runtimes
+        '';
+      };
+    in
+    {
+      devShells.ios = pkgs.mkShell {
+        packages = [ installIosSimulator ];
+      };
+    };
+}