{inputs, ...}: {
  # This one brings our custom packages from the 'pkgs' directory
  # additions = final: prev:
  #   (import ../pkgs {pkgs = final;})
  #   // {rose-pine-hyprcursor = inputs.rose-pine-hyprcursor.packages.${prev.system}.default;};

  # This one contains whatever you want to overlay
  # You can change versions, add patches, set compilation flags, anything really.
  # https://nixos.wiki/wiki/Overlays
  modifications = _final: _prev: {
    #   n8n = import ./mods/n8n.nix {inherit prev;};

    #   brave = prev.brave.override {
    #     commandLineArgs = "--password-store=gnome-libsecret";
    #     };

    # hyprpanel = inputs.hyprpanel.packages.${prev.system}.default.overrideAttrs (prev: {
    #   version = "latest"; # or whatever version you want
    #   src = final.fetchFromGitHub {
    #     owner = "Jas-SinghFSU";
    #     repo = "HyprPanel";
    #     rev = "master"; # or a specific commit hash
    #     hash = "sha256-l623fIVhVCU/ylbBmohAtQNbK0YrWlEny0sC/vBJ+dU=";
    #   };
    # });
  };

  # temp-packages = final: _prev: {
  #   temp = import inputs.nixpkgs-9e9486b {
  #     system = final.stdenv.hostPlatform.system;
  #     config.allowUnfree = true;
  #   };
  # };

  stable-packages = final: _prev: {
    stable = import inputs.nixpkgs-stable {
      system = final.stdenv.hostPlatform.system;
      config.allowUnfree = true;
    };
  };

  # pinned-packages = final: _prev: {
  #   pinned = import inputs.nixpkgs-9472de4 {
  #     system = final.stdenv.hostPlatform.system;
  #     config.allowUnfree = true;
  #   };
  # };

  # locked-packages = final: _prev: {
  #   locked = import inputs.nixpkgs-locked {
  #     system = final.stdenv.hostPlatform.system;
  #     config.allowUnfree = true;
  #   };
  # };

  master-packages = final: _prev: {
    master = import inputs.nixpkgs-master {
      system = final.stdenv.hostPlatform.system;
      config.allowUnfree = true;
    };
  };

  # Factory: not a proper overlay itself — takes system to avoid the infinite
  # recursion that occurs when accessing final/prev.system while the fixed-point
  # is still being computed.  Exposed via outputs.lib, not outputs.overlays.
  #
  # Use llm-agents' shared-nixpkgs overlay so packages with optional GPU support
  # (notably qmd) are built against this system's pkgs/config. Using the flake's
  # pre-built `packages.${system}` set pins them to llm-agents' own nixpkgs,
  # where allowUnfree is false; qmd.override { cudaSupport = true; } then fails
  # on CUDA EULA packages during the m3-ares NVIDIA specialisation build.
  #
  # Keep the exposed top-level package names aligned with llm-agents' filtered
  # flake packages, but take the package values from the shared package set.
  # Filters out internal helpers (marked `passthru.hideFromDocs = true`
  # upstream) that would otherwise clobber nixpkgs attributes. Most critically
  # this excludes `buildNpmPackage` — llm-agents' buildNpmPackage is a guarded
  # re-export whose `__functor`/`override` interaction with makeOverridable
  # breaks any package (e.g. nixpkgs' webcord) that calls
  # `buildNpmPackage.override { nodejs = ...; }`. See numtide/llm-agents.nix
  # commit 40490259 and the wrapper at packages/buildNpmPackage/package.nix.
  mkLlmAgentsOverlay = system: final: prev: let
    sharedPackages = (inputs.llm-agents.overlays.shared-nixpkgs final prev).llm-agents or {};
    exposedPackageNames =
      builtins.filter
      (name: inputs.nixpkgs.lib.hasAttrByPath [name] sharedPackages)
      (builtins.attrNames (inputs.llm-agents.packages.${system} or {}));
    exposedPackages =
      builtins.listToAttrs
      (map (name: {
          inherit name;
          value = sharedPackages.${name};
        })
        exposedPackageNames);
  in
    builtins.removeAttrs exposedPackages [
      # Internal helpers from packages/* marked hideFromDocs upstream:
      "antigravity"
      "auto-claude"
      "buildNpmPackage" # ← the culprit; breaks webcord's `buildNpmPackage.override { nodejs = ...; }`
      "bun2nix"
      "darwinOpenptyHook"
      "default" # fzf launcher; collides with nothing in nixpkgs but kept out for hygiene
      "dolt" # collides with nixpkgs.dolt (Dolt database); not used in this config
      "flake-inputs"
      "forge"
      "formatelf"
      "formatter" # collides conceptually with pkgs.formatter; not used here
      "go-bin"
      "unpinCargoMsrvHook"
      "unpinGoModVersionHook"
      "versionCheckHomeHook"
      "wrapBuddy"
    ];
}