feat: move core apps to downstream and make app modules opt-in

docs/AGENT.md

@@ -64,10 +64,12 @@ bin/          Convenience wrappers for testing (nomarchy-test-installer, …).
 
 When you add a new feature:
 
-- A new app → `features/apps/<name>/default.nix` (+ optional `config/`), import it from `features/default.nix`.
+- A new app → `features/apps/<name>/default.nix` (+ optional `config/`), import it from `features/default.nix`. **All app modules must be opt-in** via a `nomarchy.apps.<name>.enable` option defined in `core/home/options.nix`. Enabling the module should also handle the `programs.<name>.enable` or `home.packages` installation where applicable.
 - A new system service → `core/system/<name>.nix`, import from `core/default.nix`.
 - A new toggle → add to `core/system/options.nix` or `core/home/options.nix`, wire it into the relevant module, document it in `docs/OPTIONS.md`.
 
+Core user-facing apps (browsers, file managers, media players) are **not** installed by the `features/default.nix` module list. Instead, they are managed in the downstream `home.nix` (which the installer pre-fills with defaults like `firefox` and `thunar`). This keeps the Nomarchy core modules focused on the desktop environment while giving the user explicit control over their app set.
+
 ---
 
 ## 3. Guardrails (non-negotiable unless the user overrides)

docs/MIGRATION.md

@@ -123,11 +123,24 @@ create minimal versions to start:
 { pkgs, ... }:
 {
   home.packages = with pkgs; [
-    btop
+    firefox
+    xfce.thunar
+    imv
+    mpv
     fastfetch
     chromium
-    # …add anything you want; firefox/thunar/mpv/mako/etc. ship with Nomarchy.
+    # …add anything you want; mako/hyprlock/swww/rofi/etc. ship with Nomarchy.
   ];
+
+  # Enable Nomarchy's curated app configurations
+  nomarchy.apps = {
+    alacritty.enable = true;
+    btop.enable = true;
+    elephant.enable = true;
+    swayosd.enable = true;
+    walker.enable = true;
+    vscode.enable = true;
+  };
 }
 ```
 

docs/OPTIONS.md

@@ -253,6 +253,50 @@ Without prime config, supergfxd still switches modes but render-offload via `nvi
 
 `nullOr path`, default `null`. Path to a replacement config directory. When set, the items listed in `core/home/configs.nix` (`fastfetch`, `fcitx5`, `fontconfig`, `git`, `imv`, `nautilus-python`, `nomarchy`, `nomarchy-skill`, `uwsm`, `wiremix`, plus the loose files) are read from `<this-path>/<name>` instead of the bundled defaults. Distinct from `nomarchy.overrides.*` below — `configOverrides` is a working *bulk* redirect; `overrides.paths` is a *per-file* attrset map.
 
+### `nomarchy.apps.alacritty.enable`
+
+`bool`, default `false`. Enables Nomarchy's curated Alacritty configuration. The installer enables this by default.
+
+### `nomarchy.apps.btop.enable`
+
+`bool`, default `false`. Enables Nomarchy's curated btop configuration (themed color scheme, vim keys). The installer enables this by default.
+
+### `nomarchy.apps.ghostty.enable`
+
+`bool`, default `false`. Deploys Nomarchy's curated Ghostty configuration.
+
+### `nomarchy.apps.kitty.enable`
+
+`bool`, default `false`. Deploys Nomarchy's curated Kitty configuration.
+
+### `nomarchy.apps.lazygit.enable`
+
+`bool`, default `false`. Deploys Nomarchy's curated lazygit configuration.
+
+### `nomarchy.apps.tmux.enable`
+
+`bool`, default `false`. Deploys Nomarchy's curated tmux configuration.
+
+### `nomarchy.apps.elephant.enable`
+
+`bool`, default `false`. Enables Nomarchy's curated Elephant menu provider integration (required for the theme picker and background selector). The installer enables this by default.
+
+### `nomarchy.apps.walker.enable`
+
+`bool`, default `false`. Enables Nomarchy's curated Walker launcher configuration. The installer enables this by default.
+
+### `nomarchy.apps.swayosd.enable`
+
+`bool`, default `false`. Enables Nomarchy's curated SwayOSD configuration. The installer enables this by default.
+
+### `nomarchy.apps.vscode.enable`
+
+`bool`, default `false`. Enables Nomarchy's curated VSCode configuration (theming, fonts). The installer enables this by default.
+
+### `nomarchy.apps.vscode.devExtensions`
+
+`bool`, default `false`. Install Nomarchy's curated VSCode extension pack (language servers + git + editor enhancements). The palette theme extensions are *always* installed when `vscode.enable` is true — every palette except `ethereal`, `hackerman`, and `vantablack` resolves its `workbench.colorTheme` via either `pkgs.vscode-extensions` (catppuccin/nord/tokyo-night/rose-pine/gruvbox) or `pkgs.vscode-utils.extensionFromVscodeMarketplace` with version + sha256 pinned (sainnhe.everforest, qufiwefefwoyn.kanagawa, monokai.theme-monokai-pro-vscode, oldjobobo.{lumon,miasma,retro-82}, shadesOfBuntu.flexoki-light, jovejonovski.ocean-green, TahaYVR.matteblack, Bjarne.white-theme). The three palettes whose theme extension isn't on the marketplace fall back to VSCode's default theme; see the ROADMAP Later row.
+
 ### `nomarchy.apps.opencode.enable`
 
 `bool`, default `false`. opencode AI coding CLI integration. Deploys `~/.config/opencode/opencode.json`. The `opencode` package itself is **not** installed by Nomarchy — add it to your `home.packages`.
@@ -263,11 +307,7 @@ Without prime config, supergfxd still switches modes but render-offload via `nvi
 
 ### `nomarchy.accessibility.enable`
 
-`bool`, default `false`. Home-side companion to `nomarchy.system.accessibility.enable`. Three Hyprland-side adjustments: slows `input.repeat_rate` to `25` (default `40`) and `input.repeat_delay` to `1000` ms (default `600`) so holding a key isn't a runaway machine-gun for low-mobility users; binds `SUPER+ALT+S` to launch the Orca screen reader (the system preset already puts `orca` on PATH). Set to the same value as the system option. Update the bullet in `docs/ROADMAP.md` if a high-contrast palette ships as a `themes/palettes/` entry — it'll be gated on this option.
-
-### `nomarchy.vscode.devExtensions`
-
-`bool`, default `false`. Install Nomarchy's curated VSCode extension pack (language servers + git + editor enhancements). The palette theme extensions are *always* installed regardless of this flag — every palette except `ethereal`, `hackerman`, and `vantablack` resolves its `workbench.colorTheme` via either `pkgs.vscode-extensions` (catppuccin/nord/tokyo-night/rose-pine/gruvbox) or `pkgs.vscode-utils.extensionFromVscodeMarketplace` with version + sha256 pinned (sainnhe.everforest, qufiwefefwoyn.kanagawa, monokai.theme-monokai-pro-vscode, oldjobobo.{lumon,miasma,retro-82}, shadesOfBuntu.flexoki-light, jovejonovski.ocean-green, TahaYVR.matteblack, Bjarne.white-theme). The three palettes whose theme extension isn't on the marketplace fall back to VSCode's default theme; see the ROADMAP Later row.
+`bool`, default `false`. Home-side companion to `nomarchy.system.accessibility.enable`. Three Hyprland-side adjustments: slows `input.repeat_rate` to `25` (default `40`) and `input.repeat_delay` to `1000` ms (from `600`) so holding a key isn't a runaway machine-gun for low-mobility users; binds `SUPER+ALT+S` to launch the Orca screen reader (the system preset already puts `orca` on PATH). Set to the same value as the system option. Update the bullet in `docs/ROADMAP.md` if a high-contrast palette ships as a `themes/palettes/` entry — it'll be gated on this option.
 
 ### `nomarchy.themeLoader.enable`