testing

.gitignore

@@ -1,3 +1,4 @@
 .vscode
 .omo
 __pycache__
+scripts

TODO.md

@@ -0,0 +1 @@
+- 

configurations/server.nix

@@ -64,6 +64,56 @@
 
   host.ssh.enable = true;
 
+  # Offload Nix builds to the WSL2 NixOS instance running on vetymae
+  # (Windows 11 host). Sapphira only has 2 logical cores; the WSL exposes
+  # 24 cores + 14 GiB. The matchBlock with ProxyCommand is generated by
+  # modules/server/builder.nix, the other side of the same option lives in
+  # modules/wsl/builder.nix.
+  #
+  # `proxyCommand` is what marks this builder as needing the SSH matchBlock
+  # (see modules/server/builder.nix). A builder reachable directly would
+  # omit it.
+  host.builder.clients = [
+    {
+      hostName = "vetymae-nix";
+      sshUser = "oqyude";
+      sshKey = "/root/.ssh/id_ed25519";
+      # NixOS calls this `systems` (plural), not `systemTypes`. The
+      # default is empty — every derivation is rejected. The WSL NixOS
+      # runs on x86_64-linux, matching sapphira.
+      systems = [ "x86_64-linux" ];
+      # vetymae-nix drops kvm + nixos-test from its advertised
+      # system-features (see modules/wsl/builder.nix). Listing them here
+      # would not break anything (Nix intersects), but listing the
+      # features the WSL actually has is the documented contract.
+      supportedFeatures = [
+        "benchmark"
+        "big-parallel"
+      ];
+      mandatoryFeatures = [ ];
+      maxJobs = 24;
+      speedFactor = 0.5;
+      # Keep the SSH session alive across many small builds in one daemon
+      # session — compile-heavy workloads spam the daemon with hundreds of
+      # derivations and ControlMaster collapses those into one Windows hop.
+      # NB: `nix.buildMachines` has no `sshOptions` attribute, so the
+      # ControlMaster directive lives in the SSH matchBlock instead (see
+      # modules/server/builder.nix).
+      #
+      # The OpenSSH alias for this host (matches the user's
+      # ~/.ssh/config so known_hosts entries do not collide with the
+      # Windows OpenSSH entry on 127.0.0.1/vetymae) is consumed only by
+      # the SSH matchBlock below — not by `nix.buildMachines`, which has
+      # no such attribute.
+      hostKeyAlias = "wsl-nixos-on-vetymae";
+      # Use the Windows host's IP directly so the nix-daemon (running as
+      # root, without the user's ~/.ssh/config) does not need a separate
+      # `vetymae` host alias. With StrictHostKeyChecking=accept-new the
+      # first connection adds the Windows host key to /root/.ssh/known_hosts.
+      proxyCommand = "ssh oqyude@192.168.1.100 'wsl -d NixOS -- nc 127.0.0.1 22'";
+    }
+  ];
+
   networking = {
     networkmanager.enable = true;
     firewall.enable = false;

configurations/wsl.nix

@@ -35,5 +35,17 @@
     defaultUser = xlib.device.username;
   };
 
+  # Enable SSH server on WSL NixOS so sapphira can drive it directly via a
+  # ProxyCommand chain through the Windows OpenSSH layer. The shared
+  # essentials/ssh.nix module wires host keys, sops-managed user keys, and
+  # passwordless key auth — nothing to repeat here.
+  host.ssh.enable = true;
+
+  # Advertise this WSL instance as a remote Nix builder for sapphira (2
+  # cores, the bottleneck host). All builder wiring — fixing the
+  # `system-features` to drop the unsupported `kvm`, and adding the SSH
+  # user `oqyude` to trusted-users — lives in modules/wsl/builder.nix.
+  host.builder.enable = true;
+
   system.stateVersion = "24.11";
 }

flake.lock

@@ -463,8 +463,7 @@
         "plasma-manager": "plasma-manager",
         "proxy-suite": "proxy-suite",
         "sops-nix": "sops-nix",
-        "utils": "utils",
+        "utils": "utils"
-        "zeroq-credentials": "zeroq-credentials"
       }
     },
     "scss-reset": {
@@ -577,21 +576,6 @@
         "repo": "zapret-discord-youtube",
         "type": "github"
       }
-    },
-    "zeroq-credentials": {
-      "locked": {
-        "lastModified": 1772104025,
-        "narHash": "sha256-tX5I2lkwbB1leoib6Ao/Et0B1GYrn3vxw4DkFYX8uyM=",
-        "ref": "refs/heads/master",
-        "rev": "511fc5446b502ff111020bda6d57261648d62333",
-        "revCount": 75,
-        "type": "git",
-        "url": "ssh://git@github.com/oqyude/zeroq-credentials.git"
-      },
-      "original": {
-        "type": "git",
-        "url": "ssh://git@github.com/oqyude/zeroq-credentials.git"
-      }
     }
   },
   "root": "root",

flake.nix

@@ -1,9 +1,6 @@
 {
   description = "oqyude flake";
   inputs = {
-    # My
-    zeroq-credentials.url = "git+ssh://git@github.com/oqyude/zeroq-credentials.git"; # flake of creds
-
     # nixpkgs
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     # nixpkgs-master.url = "github:NixOS/nixpkgs/master";

home/modules/opencode.nix

@@ -0,0 +1,323 @@
+# Declarative OpenCode + oh-my-openagent (oh-my-opencode) plugin setup.
+#
+# Mirrors ~/.config/opencode/ on the current workstation.
+# Imported by home/server.nix (sapphira). Auto-enables programs.opencode.
+#
+# Three files this module owns on disk (via xdg.configFile):
+#   ~/.config/opencode/opencode.json         <- programs.opencode.settings
+#   ~/.config/opencode/tui.json              <- programs.opencode.tui
+#   ~/.config/opencode/oh-my-openagent.json  <- oh-my-openagent plugin config
+#
+# Override any field in the importing module if needed.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  # Body of ~/.config/opencode/oh-my-openagent.json.
+  # Loaded by the oh-my-openagent opencode plugin on startup.
+  ohMyOpenagentConfig = {
+    "$schema" = "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json";
+
+    agents = {
+      sisyphus = {
+        model = "opencode/claude-opus-5";
+        variant = "max";
+        fallback_models = [
+          { model = "opencode/kimi-k3"; }
+          {
+            model = "opencode/gpt-5.6-sol";
+            variant = "medium";
+          }
+          { model = "opencode/glm-5"; }
+          { model = "opencode/big-pickle"; }
+        ];
+      };
+      hephaestus = {
+        model = "opencode/gpt-5.6-sol";
+        variant = "medium";
+      };
+      oracle = {
+        model = "opencode/gpt-5.6-sol";
+        variant = "xhigh";
+        fallback_models = [
+          {
+            model = "opencode/gemini-3.1-pro";
+            variant = "high";
+          }
+          {
+            model = "opencode/claude-opus-5";
+            variant = "max";
+          }
+        ];
+      };
+      librarian = {
+        model = "minimax-coding-plan/MiniMax-M3";
+      };
+      explore = {
+        model = "opencode/gpt-5-nano";
+        fallback_models = [
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+        ];
+      };
+      "multimodal-looker" = {
+        model = "opencode/gpt-5.6-sol";
+        variant = "low";
+        fallback_models = [
+          { model = "opencode/gpt-5-nano"; }
+        ];
+      };
+      prometheus = {
+        model = "opencode/claude-fable-5";
+        variant = "high";
+        fallback_models = [
+          {
+            model = "opencode/kimi-k3";
+            variant = "high";
+          }
+        ];
+      };
+      metis = {
+        model = "opencode/claude-opus-5";
+        variant = "high";
+        fallback_models = [
+          {
+            model = "opencode/kimi-k3";
+            variant = "low";
+          }
+        ];
+      };
+      momus = {
+        model = "opencode/gpt-5.6-sol";
+        variant = "xhigh";
+        fallback_models = [
+          {
+            model = "opencode/claude-opus-5";
+            variant = "max";
+          }
+          {
+            model = "opencode/gemini-3.1-pro";
+            variant = "high";
+          }
+        ];
+      };
+      atlas = {
+        model = "opencode/claude-sonnet-4-6";
+        fallback_models = [
+          {
+            model = "opencode/gpt-5.6-sol";
+            variant = "medium";
+          }
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+        ];
+      };
+      "sisyphus-junior" = {
+        model = "opencode/claude-sonnet-4-6";
+        fallback_models = [
+          {
+            model = "opencode/gpt-5.6-sol";
+            variant = "medium";
+          }
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+          { model = "opencode/big-pickle"; }
+        ];
+      };
+    };
+
+    categories = {
+      "visual-engineering" = {
+        model = "opencode/gemini-3.1-pro";
+        variant = "high";
+        fallback_models = [
+          { model = "opencode/glm-5"; }
+          {
+            model = "opencode/claude-opus-5";
+            variant = "max";
+          }
+        ];
+      };
+      ultrabrain = {
+        model = "opencode/gpt-5.6-sol";
+        variant = "xhigh";
+        fallback_models = [
+          {
+            model = "opencode/gemini-3.1-pro";
+            variant = "high";
+          }
+          {
+            model = "opencode/claude-opus-5";
+            variant = "max";
+          }
+        ];
+      };
+      deep = {
+        model = "opencode/gpt-5.6-sol";
+        variant = "medium";
+        fallback_models = [
+          {
+            model = "opencode/claude-opus-5";
+            variant = "max";
+          }
+          {
+            model = "opencode/gemini-3.1-pro";
+            variant = "high";
+          }
+        ];
+      };
+      artistry = {
+        model = "opencode/gemini-3.1-pro";
+        variant = "high";
+        fallback_models = [
+          {
+            model = "opencode/claude-opus-5";
+            variant = "max";
+          }
+          {
+            model = "opencode/gpt-5.6-sol";
+            variant = "high";
+          }
+        ];
+      };
+      quick = {
+        model = "opencode/gpt-5.4-mini";
+        fallback_models = [
+          { model = "opencode/gemini-3-flash"; }
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+          { model = "opencode/gpt-5-nano"; }
+        ];
+      };
+      "unspecified-low" = {
+        model = "opencode/claude-sonnet-4-6";
+        fallback_models = [
+          {
+            model = "opencode/gpt-5.6-sol";
+            variant = "medium";
+          }
+          { model = "opencode/gemini-3-flash"; }
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+        ];
+      };
+      "unspecified-high" = {
+        model = "opencode/claude-sonnet-4-6";
+        fallback_models = [
+          {
+            model = "opencode/gpt-5.6-sol";
+            variant = "medium";
+          }
+          { model = "opencode/gemini-3-flash"; }
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+        ];
+      };
+      writing = {
+        model = "opencode/gemini-3-flash";
+        fallback_models = [
+          { model = "opencode/claude-sonnet-4-6"; }
+          { model = "minimax-coding-plan/MiniMax-M3"; }
+        ];
+      };
+    };
+  };
+in
+let
+  # nixpkgs ast-grep only ships binary `ast-grep`; omo's ast-grep skill probes
+  # for `sg` (or ast-grep). Provide both via a symlink wrapper.
+  astGrepWithSg = pkgs.runCommandLocal "ast-grep-with-sg" { } ''
+    mkdir -p $out/bin
+    ln -s ${pkgs.ast-grep}/bin/ast-grep $out/bin/ast-grep
+    ln -s ${pkgs.ast-grep}/bin/ast-grep $out/bin/sg
+  '';
+in
+{
+  programs.opencode = {
+    enable = true;
+
+    # Extras available to opencode-wrapped (via --suffix PATH on the wrapper):
+    #   pkgs.nodejs_22  — npx/npm for MCP servers (webpage-mcp) and omo's plugin loader
+    #   pkgs.ast-grep   — `sg` CLI; omo's ast-grep skill requires it (omo doctor)
+    #   pkgs.bun        — omo prefers bun; with bun on PATH, `omo doctor` skips node fallback
+    #   pkgs.gh         — GitHub CLI; omo's GitHub automation features require it
+    extraPackages = [
+      pkgs.nodejs_22
+      astGrepWithSg
+      pkgs.bun
+      pkgs.gh
+    ];
+
+    # ~/.config/opencode/opencode.json
+    settings = {
+      plugin = [ "oh-my-openagent@latest" ];
+      mcp = {
+        webpage = {
+          type = "local";
+          command = [
+            "npx"
+            "-y"
+            "-p"
+            "webpage-mcp@latest"
+            "webpage-mcp-stdio"
+          ];
+        };
+      };
+    };
+
+    # ~/.config/opencode/tui.json
+    # Mirrors workstation: oh-my-openagent also registered for the TUI.
+    tui = {
+      plugin = [ "oh-my-openagent@latest" ];
+    };
+  };
+
+  # ~/.config/opencode/oh-my-openagent.json — read by the plugin on startup.
+  xdg.configFile."opencode/oh-my-openagent.json".text = builtins.toJSON ohMyOpenagentConfig;
+
+  # Same extras on the user's PATH too, so `omo doctor` and standalone invocations
+  # of `sg`, `gh`, `bun`, `npm`, `npx` work in the user's shell — not only inside
+  # the opencode-wrapped binary.
+  home.packages = [
+    pkgs.nodejs_22
+    astGrepWithSg
+    pkgs.bun
+    pkgs.gh
+  ];
+
+  # Expose `opencode web` as a systemd user service. nginx on sapphira
+  # proxies https://opencode.zeroq.su -> 127.0.0.1:4096.
+  #
+  # --hostname 0.0.0.0 binds the listener to every interface (matches the
+  # "0.0.0.0" intent; nginx then reverse-proxies 127.0.0.1:4096 internally).
+  # --cors https://opencode.zeroq.su lets the browser session reach the
+  # server from that origin without CORS rejection.
+  #
+  # SECURITY: with no password, anyone reaching the upstream socket gets full
+  # opencode. Bind 0.0.0.0 + listener == bridge == shell. The password is
+  # supplied via sops-managed EnvironmentFile, declared in modules/users.nix
+  # and decrypted to a path hardcoded here (home-manager modules cannot read
+  # `config.sops.*` — sops-nix options are NixOS-only).
+  programs.opencode.web = {
+    enable = true;
+    environmentFile = "${config.home.homeDirectory}/.config/opencode/server.env";
+    extraArgs = [
+      "--hostname"
+      "0.0.0.0"
+      "--cors"
+      "https://opencode.zeroq.su"
+    ];
+  };
+
+  # Workaround: home-manager activation updates the GC root `current-home`
+  # only at the very end (line 358 of the generated activate script), AFTER all
+  # `home.activation.*` dag entries have run. So we cannot read current-home
+  # from a dag entry — it still points to the OLD generation at the time our
+  # script executes. Instead, read `new-home`, which the activator writes
+  # BEFORE any dag entry runs and which already points at the new generation.
+  home.activation.relinkHomeManager = lib.hm.dag.entryAfter [] ''
+    target="$HOME/.local/state/nix/profiles/home-manager-24-link"
+    newGen="$(readlink -e "''${XDG_STATE_HOME:-$HOME/.local/state}/home-manager/gcroots/new-home" 2>/dev/null || true)"
+    if [[ -n "$newGen" && "$(readlink -f "$target")" != "$newGen" ]]; then
+      echo "home-manager: relinking $target -> $newGen"
+      ln -sfn "$newGen" "$target"
+    fi
+  '';
+}

home/server.nix

@@ -8,6 +8,7 @@
 {
   imports = [
     ./minimal.nix
+    ./modules/opencode.nix
   ];
   home.file = xlib.helpers.mkSymlinks config {
     "${config.home.homeDirectory}/External/Music" = "Music";

modules/containers/kokoro-tts.nix

@@ -107,7 +107,8 @@ in
           after = [ "podman-build-kokoro-tts.service" ];
           requires = [ "podman-build-kokoro-tts.service" ];
           serviceConfig.Restart = lib.mkOverride 90 "always";
-          wantedBy = [ "multi-user.target" ];
+          # Auto-start disabled: start manually with `systemctl start podman-kokoro-tts`.
+          wantedBy = [ ];
         };
       };
     };

modules/options.nix

@@ -9,6 +9,41 @@
 # the option exists. `modules/essentials/ssh.nix` does not belong here: it
 # declares and reads `host.ssh.enable` itself, within one module.
 {
+  # Remote-builder wiring. A coordinator (e.g. sapphira) sets
+  # `host.builder.clients` to register remote build machines;
+  # a builder host (e.g. the WSL on vetymae) sets `host.builder.enable`
+  # to advertise itself. The two halves are intentionally split so a single
+  # declaration in configurations/* is enough to flip each side.
+  options.host.builder = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Advertise this host as a remote Nix builder and accept builds
+        from other machines in the flake over SSH.
+      '';
+    };
+    clients = lib.mkOption {
+      type = lib.types.listOf lib.types.attrs;
+      default = [ ];
+      description = ''
+        List of remote Nix build machines this coordinator should
+        register via `nix.buildMachines`. Each entry matches the NixOS
+        option schema (hostName, sshUser, sshKey, systems,
+        supportedFeatures, ...). Two extra attributes are consumed by
+        modules/server/builder.nix and stripped before reaching
+        `nix.buildMachines`:
+          - `proxyCommand` — generates a per-builder Host block in the
+            system-wide OpenSSH config (the nix-daemon runs as root and
+            cannot see the user's ~/.ssh/config).
+          - `hostKeyAlias` — alias used inside that SSH matchBlock.
+        A builder reachable on its own (no ProxyCommand needed) omits
+        both and gets no SSH matchBlock. Empty by default — opt in by
+        setting this list.
+      '';
+    };
+  };
+
   options.host."3x-ui" = {
     # Domain whose Let's Encrypt cert (at /var/lib/acme/<domain>/)
     # gets mounted read-only into the 3x-ui container so the panel

modules/server/builder.nix

@@ -0,0 +1,130 @@
+# sapphira (and any other server-class coordinator) — register remote
+# builders, and make sure the nix daemon (running as root) can resolve the
+# SSH host alias with its ProxyCommand chain.
+#
+# The `host.builder.clients` option itself is declared in
+# modules/options.nix (cross-module). The actual builder list is set by the
+# configuration (e.g. configurations/server.nix) — this module is generic
+# over every entry on the list.
+{
+  config,
+  lib,
+  ...
+}:
+let
+  # Attributes that belong to the SSH matchBlock only — NOT to
+  # `nix.buildMachines` (that schema has no hostKeyAlias/proxyCommand).
+  # Strip them before handing the list to nix.buildMachines.
+  sshOnlyAttrs = [
+    "hostKeyAlias"
+    "proxyCommand"
+  ];
+  forNix = b: removeAttrs b sshOnlyAttrs;
+  # After NixOS's nix.buildMachines submodule runs, each entry has all
+  # attributes defaulted (protocol=ssh, systems=[], etc.). Read from that
+  # processed list so the formatter never trips on a missing field.
+  processedBuilders = config.nix.buildMachines;
+
+  # Serialise one builder to the textual format Nix's daemon expects in
+  # `nix.conf`'s `builders` line. Mirrors `buildMachinesText` from
+  # nixos/modules/config/nix-remote-build.nix so the result is identical
+  # to what NixOS writes to /etc/nix/machines — we just inline it instead
+  # of relying on `@/etc/nix/machines`, which Nix 2.34 parses but does
+  # not act on (the daemon's `external-builders` list stays empty and the
+  # client reports "configure remote builders via 'builders'" forever).
+  formatBuilder = b:
+    let
+      # Nix 2.34 refuses to dispatch derivations to a builder whose protocol
+      # is `ssh` (the NixOS default): the daemon leaves `external-builders`
+      # empty even when the `builders` line is well-formed, and the client
+      # falls back to local. `ssh-ng` (the new in-band protocol) actually
+      # opens the dispatcher. Override the NixOS default here.
+      proto = "ssh-ng://";
+      user = if b.sshUser != null && b.sshUser != "" then "${b.sshUser}@" else "";
+      systems =
+        if b.system != null then b.system
+        else if b.systems != [ ] then lib.concatStringsSep "," b.systems
+        else "-";
+      sshKey = if b.sshKey != null && b.sshKey != "" then b.sshKey else "-";
+      maxJobs = toString b.maxJobs;
+      speedFactor = toString b.speedFactor;
+      allFeats = b.supportedFeatures ++ b.mandatoryFeatures;
+      supported =
+        if allFeats == [ ] then "-"
+        else lib.concatStringsSep "," allFeats;
+      mandatory =
+        if b.mandatoryFeatures == [ ] then "-"
+        else lib.concatStringsSep "," b.mandatoryFeatures;
+      publicKey = if b.publicHostKey != null then b.publicHostKey else "-";
+    in
+    lib.concatStringsSep " " [
+      "${proto}${user}${b.hostName}"
+      systems
+      sshKey
+      maxJobs
+      speedFactor
+      supported
+      mandatory
+      publicKey
+    ];
+  inlineBuilders = lib.concatMapStringsSep "\n" formatBuilder processedBuilders;
+
+  # One OpenSSH host block per builder that needs a ProxyCommand.
+  # Placed in `programs.ssh.extraConfig` so it ends up in
+  # /etc/ssh/ssh_config (the file OpenSSH consults system-wide, including
+  # for the nix-daemon running as root).
+  #
+  # Only builders with a `proxyCommand` attribute get a block: a builder
+  # reachable on its own (e.g. otreca on a public IP) needs no help from
+  # here. The attribute is the literal ProxyCommand string (passed
+  # verbatim to ssh); the configuration is responsible for matching it
+  # with the `hostName` field.
+  hostBlock = b: ''
+    Host ${b.hostName}
+      User ${b.sshUser}
+      HostKeyAlias ${b.hostKeyAlias or b.hostName}
+      ProxyCommand ${b.proxyCommand}
+      StrictHostKeyChecking accept-new
+      ServerAliveInterval 30
+      ServerAliveCountMax 3
+      ControlMaster auto
+      ControlPersist 60
+      ConnectTimeout 15
+  '';
+  blocks = map hostBlock (lib.filter (b: b ? proxyCommand) config.host.builder.clients);
+in
+{
+  config = lib.mkIf (config.host.builder.clients != [ ]) {
+    # Off-by-default in NixOS. Without this, the nix-remote-build module
+    # sets `nix.settings.builders = null` and the list is dropped from
+    # /etc/nix/nix.conf entirely, even though `nix.buildMachines` is
+    # populated. (The build-machine list still lands in /etc/nix/machines
+    # but nix-daemon reads `builders`, not /etc/nix/machines, when
+    # distributedBuilds is false.)
+    nix.distributedBuilds = true;
+    nix.buildMachines = map forNix config.host.builder.clients;
+    # Nix 2.34's daemon does not act on `@/etc/nix/machines` (the file
+    # format NixOS's nix-remote-build writes to): the `builders` config
+    # key is parsed for display but `external-builders` stays empty and
+    # the scheduler ignores it. Inlining the same builder text here — in
+    # the exact format the NixOS module itself uses — actually wires up
+    # the SSH dispatch. `mkForce` is required because the nix-remote-build
+    # module sets `builders = null` whenever distributedBuilds is *false*;
+    # our config flips it to *true*, so the module's mkIf does not fire
+    # and there is no actual conflict — but pinning it with mkForce makes
+    # the intent obvious and survives any future change in default
+    # behaviour.
+    nix.settings.builders = lib.mkForce inlineBuilders;
+
+    # Append per-builder Host blocks to the system-wide OpenSSH client
+    # config. `programs.ssh.extraConfig` is of type `lines`, merged across
+    # modules, and prepended (before `Host *`) in /etc/ssh/ssh_config —
+    # which is exactly the spot where specific Host blocks have to live.
+    programs.ssh.extraConfig = lib.concatStrings blocks;
+
+    # Parallel builds on sapphira itself stay at 2 — that matches the
+    # physical cores and keeps the coordinator responsive while the WSL
+    # absorbs the heavy lifting. The essentials/settings.nix already
+    # leaves max-jobs at the default `auto` (2 here); no override needed.
+  };
+}

modules/server/default.nix

@@ -10,6 +10,7 @@
     ../pkgs/beets.nix
     ./acme.nix
     ./bentopdf.nix
+    ./builder.nix
     ./calibre-web.nix
     ./chrony.nix
     ./coredns.nix

modules/server/nginx.nix

@@ -194,6 +194,17 @@ in
           proxyWebsockets = true;
         };
       };
+      # sapphira itself: opencode web runs as a systemd user service
+      # (programs.opencode.web.enable in home/modules/opencode.nix) on
+      # 127.0.0.1:4096 with --hostname 0.0.0.0.
+      "opencode.zeroq.su" = {
+        forceSSL = true;
+        enableACME = true;
+        locations."/" = {
+          proxyPass = "http://127.0.0.1:4096";
+          proxyWebsockets = true;
+        };
+      };
       "nextcloud.zeroq.su" = {
         forceSSL = true;
         enableACME = true;

modules/users.nix

@@ -8,7 +8,9 @@ let
   user = "${xlib.device.username}";
   userGroup = config.users.users."${user}".group;
 
-  # sops secret factory: name == key by default, owner/group default to root
+  # sops secret factory: name == key by default, owner/group default to root.
+  # `format` and `sopsFile` default to yaml + defaultSopsFile, matching every
+  # pre-existing caller.
   mkSecret =
     {
       path,
@@ -16,14 +18,16 @@ let
       key ? null,
       owner ? null,
       group ? null,
+      format ? "yaml",
+      sopsFile ? null,
     }:
     {
-      format = "yaml";
+      inherit format path mode;
-      inherit path mode;
     }
     // lib.optionalAttrs (key != null) { inherit key; }
     // lib.optionalAttrs (owner != null) { inherit owner; }
-    // lib.optionalAttrs (group != null) { inherit group; };
+    // lib.optionalAttrs (group != null) { inherit group; }
+    // lib.optionalAttrs (sopsFile != null) { inherit sopsFile; };
 
   # default owner = device user
   mkUserSecret =
@@ -98,6 +102,35 @@ in
         path = "${xlib.dirs.user-home}/.config/sops/age/keys.txt";
         mode = "0600";
       };
+      # opencode web server creds + Gemini API key.
+      # Decrypted as a single dotenv file (no `key`) and consumed by the
+      # systemd user unit opencode-web as EnvironmentFile.
+      # Source: secrets/opencode.env (encrypted, see sops/age below).
+      opencode_server = mkUserSecret {
+        path = "${xlib.dirs.user-home}/.config/opencode/server.env";
+        mode = "0600";
+        format = "dotenv";
+        sopsFile = ../secrets/opencode.env;
+      };
+      # opencode provider credentials (XDG_DATA_HOME/opencode/...).
+      # Both files are read by opencode at startup to populate the providers
+      # list. Mirror of ~/.local/share/opencode/ on the workstation.
+      # key = "" → decrypt the WHOLE file as-is (the JSON has no top-level
+      # field named after the secret; it IS the secret).
+      opencode_auth = mkUserSecret {
+        path = "${xlib.dirs.user-home}/.local/share/opencode/auth.json";
+        mode = "0600";
+        format = "json";
+        sopsFile = ../secrets/opencode-auth.json;
+        key = "";
+      };
+      opencode_account = mkUserSecret {
+        path = "${xlib.dirs.user-home}/.local/share/opencode/account.json";
+        mode = "0600";
+        format = "json";
+        sopsFile = ../secrets/opencode-account.json;
+        key = "";
+      };
       ssh_key_private = mkUserSecret {
         path = "${xlib.dirs.user-home}/.ssh/id_ed25519";
         mode = "0600";

modules/wsl/builder.nix

@@ -0,0 +1,54 @@
+# WSL NixOS — advertise this host as a remote Nix builder.
+#
+# Why a dedicated module instead of inlining into configurations/wsl.nix:
+# every "what makes this WSL different from a desktop/server" concern
+# belongs under modules/wsl/ — that is the contract the device-type import in
+# modules/default.nix wires up. Keeping it here means flipping the feature on
+# later on another WSL host (e.g. a future vetymae-2) is one import away.
+#
+# The `host.builder.enable` option itself is declared in
+# modules/options.nix (cross-module).
+{
+  config,
+  lib,
+  ...
+}:
+{
+  config = lib.mkIf config.host.builder.enable {
+    # WSL2 does not expose /dev/kvm to the guest (no nested virt by default,
+    # and Hyper-V's /dev/kvm is not bind-mounted into the WSL namespace).
+    # The default NixOS module advertises `kvm nixos-test benchmark
+    # big-parallel` as this host's system-features, which is a lie: any
+    # derivation that requires `kvm` will be dispatched here and immediately
+    # fail with "cannot open /dev/kvm". Nix selects builders by matching the
+    # derivation's required features against what the builder advertises, so
+    # the only way to keep WSL useful is to retract the features it cannot
+    # actually deliver. `nixos-test` is dropped for the same reason — it
+    # wants kvm anyway.
+    #
+    # `mkForce` because the NixOS module base-config sets a non-empty
+    # default; without force the lists would concatenate and the WSL would
+    # *still* advertise kvm.
+    nix.settings.system-features = lib.mkForce [
+      "benchmark"
+      "big-parallel"
+    ];
+
+    # Builds arrive over SSH as the user `oqyude` (see
+    # modules/server/builder.nix). On the default trusted-users = ["root"]
+    # only root can call nix-store, so the SSH session would fail to realise
+    # any .drv. Adding the SSH user to trusted-users lets the remote nix-build
+    # driver drive nix-store on the builder side. `mkForce` for the same
+    # concatenation reason as above.
+    nix.settings.trusted-users = lib.mkForce [
+      "root"
+      "oqyude"
+    ];
+
+    # The local daemon already parallelises across all 24 logical cores
+    # (max-jobs = 24 is what we measured). When acting as a builder, we
+    # want to keep that — remote builds land through SSH and the daemon
+    # serves them on top of its normal pool. No override needed; documented
+    # here so a future reader does not "tidy up" by setting max-jobs low.
+  };
+}

modules/wsl/default.nix

@@ -9,6 +9,7 @@
     ../pkgs/beets.nix
     ./containers
     ./nix-serve.nix
+    ./builder.nix
     # ./tools
   ];
 }

result

@@ -0,0 +1 @@
+/nix/store/x6qwqsl3xprb9pwinajspkkg4r5lgxcz-nixos-system-sapphira-default

secrets/opencode-account.json

@@ -0,0 +1,29 @@
+{
+	"version": "ENC[AES256_GCM,data:Og==,iv:7CSdsBk5u2UKOn1dE6CYOiPlmYYkUmmxV1VD6nVIIoc=,tag:z1z57WidbvdlIY5CHQU/TA==,type:int]",
+	"accounts": {
+		"fa02561b1001pVHOSO4a6JW9Cv": {
+			"id": "ENC[AES256_GCM,data:Xm+h0mYIkOAhRI2MZt/nNxMZ+UW7twFu3a4=,iv:PQlE5hc5UPpShQju31AjNKlmaBovCH0eKGnMi1wIfwg=,tag:P1qA5OAQMyICDk52m3jCfA==,type:str]",
+			"serviceID": "ENC[AES256_GCM,data:5S0wMZ1ES5GjSnp1uXhuxLdjlA==,iv:6DvaCiDjBo/tKpjVSazxSNtticZjAmrcA00jjzXsKmc=,tag:S24kxmT6GJyoKSywJGCYlw==,type:str]",
+			"description": "ENC[AES256_GCM,data:HEISFOphDA==,iv:3IvEjXPs1RA0xeOO2k3ECdGUXb55ueR0yxJSdWDqqho=,tag:YgtEMx7nPxgY4xjr8B3isA==,type:str]",
+			"credential": {
+				"type": "ENC[AES256_GCM,data:kdOU,iv:8umxWXKvaDqYO5woOQDqTuuwtdgJ7oVJD8XU7D841k4=,tag:QBRDcCCIqbfbvY3d2CD67w==,type:str]",
+				"key": "ENC[AES256_GCM,data:PGzIgMDQkclf4RiDO3lQE/fQ4V0hM6nvFB/XpUqdMiAKvW/cQyCdmxdwwJQe4FSPHwyYzYDfi0VULf/tfYq+hOx5mC5F0/9ldLw2cbf68TPdcCMjIZEokLUAqe0qJlTnGxdO4PRzzL1LvOKr3Mlo4KcgoUpmeFPxwvxL2Wk=,iv:Z4gna9cUuz3YjtS2v0+WsKmJV66dryl+XtBdLbUGhrI=,tag:WPgVnEFfrJtG2pXRHGXVDQ==,type:str]"
+			}
+		}
+	},
+	"active": {
+		"minimax-coding-plan": "ENC[AES256_GCM,data:Bt0Yhiz5qmJ1BIU8bDle7mVtyVC6r/lX4gY=,iv:CRmuL1bL0Jc+RFeoSbZyyIHSyBd/RojNjzzVRRODFjs=,tag:mOdKWxDWQLgYSVYiM6hugw==,type:str]"
+	},
+	"sops": {
+		"age": [
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAyUk03UnVZOUtKcDJhTUdy\nMUhBcDNROGxHR1RPcEZjeHdnYmtWck5KcVZnClIvckVxZmdBQWg3b0FsVFRVRVBP\nRUVaVTFqeDFQbVYvNk42MnlFVlJpTmsKLS0tIFBBaWJwb09ySGFGUHZsajhlb01v\nek10Q3FBWUM5Wms0UUFtV1p1b29mL1kK+hr3lbwBDmtedEeA0hnXSAxC/HOE/9iz\n5kMSbzno+UXnVG/EfLHsks2G43caBmCZlUp7spTt5DLnpwL923GnFQ==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age13l2gtk0nzr484zprp7e0pkrt0ne0j4asyn2pjmlaw73nte7t7d8q4sqtxm"
+			}
+		],
+		"lastmodified": "2026-10-03T13:34:07Z",
+		"mac": "ENC[AES256_GCM,data:e+4yZeDnprtRi1jkP8A9DxNOjemIIi9VwOANAnT2f1UEJVBm6v3MPrlLPZ3Kyg7I2wnIw25Ih6boDn92fxWrIut8PmFPFmlCUu0v4mK49YQmB4dA/i/RYQMAZ6pG2JtPMUWOYsHppU67RB/hKQmJigZSz49tBOHiDrgUa+kfK9c=,iv:872D82r8gIl+mMYNy7iEhnxG/1HwrNg1TO6QXIf7Vo4=,tag:Sd8pSaYZhRxRY6jUL9DxhQ==,type:str]",
+		"unencrypted_suffix": "_unencrypted",
+		"version": "3.13.3"
+	}
+}

secrets/opencode-auth.json

@@ -0,0 +1,18 @@
+{
+	"minimax-coding-plan": {
+		"type": "ENC[AES256_GCM,data:cW4a,iv:giJwLOEm5ZoyX1fly0R0xTUsMqtAClmpuSk6d9kaHb4=,tag:YrR/kW3ZFOxot9WeP9kibw==,type:str]",
+		"key": "ENC[AES256_GCM,data:SvZTe8f3/Es1/DOLpcXuY7IyJpLlkuEN38wUd1uBdOdkzA9QZxkroQ93fuvyqSDFAIfDEfSQsAElME3VzaFVB0Y8t97wB2gXWm4xHXjFyzcu+uaOq/deBQ+B13/xMFfjsMlKR1H1WJ4VRZYY3sc70Wsvid+6hxOdO/a/i3k=,iv:x53HYXFeQ9NEMr5SDM8KEOsrzIMzdNAtSeY26FdKkMw=,tag:uW2xCO+cA7nKHWHpBZCVkw==,type:str]"
+	},
+	"sops": {
+		"age": [
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBlSkw3Z0VrTjBBa1VsQlRp\nbHUrZ3hXb1Q1Z0kxdVJhV1hVWnNLUUdDclhjCjg0aTNuUlhNNzdFajhPNE1DN2Fn\nZzJZNVRUYUxpNDFJK3pLTkE4UWFsbkUKLS0tIE8wUkZuN21aaXhpZlNzUnBZR0tC\nU2xwcjRJNnRPdTJ6elRhS08ybjlOS1kKBIfDuZSIOFoxCUc21GnqxipT0ouxDHsB\nXGBvj8zkJ+07tDVMYAhjWYkQK9wBNtUMvgxKedvLZNIn0Hm0Z0rPkw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age13l2gtk0nzr484zprp7e0pkrt0ne0j4asyn2pjmlaw73nte7t7d8q4sqtxm"
+			}
+		],
+		"lastmodified": "2026-10-03T13:34:07Z",
+		"mac": "ENC[AES256_GCM,data:lUAw+AL62sxoy695aV1lYgUm4JQwzC+7c36vupe/mJCeNNzVm5ZadGaGsno28EmF4fGxOVsJzn939nhNRtQZ6MwZNhShoSZBmpO51vHRm1YsfAR1sWi/u9akbcu906fjrJLyql9sWWmnxiqxn70gq4Ov6ptsx0VjtiwyWOk+cps=,iv:zckNKtUMu+4DKYp9hwbMPtm6bh46iRNGguff3AIfOa0=,tag:b7svS76JLEJmb+gkPNhQhQ==,type:str]",
+		"unencrypted_suffix": "_unencrypted",
+		"version": "3.13.3"
+	}
+}

secrets/opencode.env

@@ -0,0 +1,9 @@
+OPENCODE_SERVER_USERNAME=ENC[AES256_GCM,data:6dqD4TnURrk=,iv:UUOBwiykDe9Wv/78wmmx5JnJEWScQRQh2yM+806lF7Y=,tag:vpSB652uQ+ASZQh4PS12Sw==,type:str]
+OPENCODE_SERVER_PASSWORD=ENC[AES256_GCM,data:mAIHJ5+pupEFdbTurc6davXecgPrHA==,iv:n3BNhwxbJJ6WVq02ANUi0nNAploCsPQIF/JBT1TXxHg=,tag:2YKnOytFny9x8rg8X/7nxA==,type:str]
+GEMINI_API_KEY=ENC[AES256_GCM,data:hKbpsv1ZrhROPMHYUUAc/oErz0JPSORLr7/B8N1VgbqVZ1FoVf7LM5o=,iv:+3hzXJkjSwpBdwB231PnuE7T+c7A6bmYCckKAqljO0Q=,tag:VVKsFxptQEg6GZAdCQ1A+g==,type:str]
+sops_age__list_0__map_enc=-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBPZFdZZUZxOXRXUUF1NVdV\nRmUrQ2FqeGJWdTZvVkxncEpBb3FpaW5VUEM4Ck1WQ0xLVzBrOG1IOER1dXhxZUEy\nTnV3SnlFSi83b3VGdWtQZ0hYeXRyNEUKLS0tIHhqai9mYVRmR091S0w5cmNMK0Y0\nZVVUdzB6Ky9PUFExclBNcnZUQWFrOXcKQq4qlRz5+1GR3LB9/CkZSz1nyFthk7mg\n2j3wUXQ41kyRUu8pM40eCxHVkpMaa/7fjZ40nRjrnwZ7Brd5Q8z3MQ==\n-----END AGE ENCRYPTED FILE-----\n
+sops_age__list_0__map_recipient=age13l2gtk0nzr484zprp7e0pkrt0ne0j4asyn2pjmlaw73nte7t7d8q4sqtxm
+sops_lastmodified=2026-10-03T12:47:19Z
+sops_mac=ENC[AES256_GCM,data:thYwpX+SrNRL3hdvUzXPzh3Q07Dt6ZF6cplKS5Iopj7twS5lQoB4C1OuWf00GUUPDEOaxF3WK24XiRkMoA8TZHSLJ/k8HPV9tDlPnNHMh3pMj9pIfR5NTDMASmld17PjBvwPMOB/uvMn26O1G6G3ImW4Zioy3AyDP2zmed9+3Xk=,iv:uKGvvwvDTEQom636P9YcUjLMpIrRusCFI9HJqNJihkw=,tag:Qfc5KRSNn+Yy74pKKvkjOA==,type:str]
+sops_unencrypted_suffix=_unencrypted
+sops_version=3.13.3