feat: self-package claude-code

flake/overlays.nix

@@ -1,19 +1,5 @@
-{ inputs, ... }:
+_:
 
 {
-  flake.overlays.default =
-    _: prev:
-    let
-      pkgs-stable = import inputs.nixpkgs-stable {
-        inherit (prev.stdenv.hostPlatform) system;
-        inherit (prev) config;
-      };
-      pkgs-master = import inputs.nixpkgs-master {
-        inherit (prev.stdenv.hostPlatform) system;
-        inherit (prev) config;
-      };
-    in
-    {
-      inherit (pkgs-master) claude-code;
-    };
+  flake.overlays.default = _: _: { };
 }