feat(pkgs/darwin): add codexbar-bin and enable copilot/gemini providers

Add CodexBar v0.17.0, a macOS menu bar app that displays usage limits
for AI tools (Codex, Claude, Cursor, Gemini, Copilot). Enable the
github-copilot and gemini-cli modules so CodexBar can track their usage.

Author: DivitMittal

home/ai/repl/copilot/default.nix

@@ -6,7 +6,7 @@
   imports = lib.custom.scanPaths ./.;
 
   programs.github-copilot = {
-    enable = false;
+    enable = true;
     package = pkgs.writeShellScriptBin "copilot" ''
       exec ${pkgs.ai.copilot-cli}/bin/copilot --enable-all-github-mcp-tools --banner "$@"
     '';

home/ai/repl/gemini/default.nix

@@ -6,7 +6,7 @@
   imports = lib.custom.scanPaths ./.;
 
   programs.gemini-cli = {
-    enable = false;
+    enable = true;
     package = pkgs.writeShellScriptBin "gemini" ''
       exec ${pkgs.pnpm}/bin/pnpm dlx @google/gemini-cli "$@"
     '';

home/gui/darwin/misc.nix

@@ -24,6 +24,7 @@
       MultiSoundChanger-bin # aggregate-output volume control in menubar
       LibreScore-bin # Music notation ripper
       iris # Webcam mirror
+      #codexbar-bin # AI usage limits in menubar
       #LosslessSwitcher-bin # Lossless audio toggle in menubar
       ;
 

pkgs/darwin/codexbar-bin/package.nix

@@ -0,0 +1,42 @@
+{
+  stdenvNoCC,
+  fetchzip,
+  lib,
+  makeWrapper,
+  unzip,
+  ...
+}:
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "CodexBar";
+  version = "0.17.0";
+  src = fetchzip {
+    extension = "zip";
+    url = "https://github.com/steipete/CodexBar/releases/download/v${finalAttrs.version}/CodexBar-${finalAttrs.version}.zip";
+    hash = "sha256-tPGYIqrSRDpLYv2yP2EA6dFVpAfaL+gPxaR3osbYBnU=";
+  };
+
+  nativeBuildInputs = [unzip makeWrapper];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p "$out/Applications/${finalAttrs.pname}.app"
+    cp -R ./* "$out/Applications/${finalAttrs.pname}.app"
+
+    if [[ -e "$out/Applications/${finalAttrs.pname}.app/Contents/MacOS/${finalAttrs.pname}" ]]; then
+      mkdir -p "$out/bin"
+      makeWrapper "$out/Applications/${finalAttrs.pname}.app/Contents/MacOS/${finalAttrs.pname}" "$out/bin/${finalAttrs.pname}"
+    fi
+
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "macOS menu bar app showing Codex, Claude, Cursor, Gemini, Copilot limits";
+    homepage = "https://github.com/steipete/CodexBar";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.darwin;
+    maintainers = with lib.maintainers; [DivitMittal];
+    sourceProvenance = with lib.sourceTypes; [binaryNativeCode];
+  };
+})