{ config, lib, pkgs, ... }:
let
  jsonFormat = pkgs.formats.json { };
in
{
  # Host modules contribute keys here; the module system deep-merges them into
  # a single ~/.config/claude/settings.json.
  options.my.claude.settings = lib.mkOption {
    type = jsonFormat.type;
    default = { };
    description = "Claude Code settings.json contents.";
  };

  config.xdg.configFile."claude/settings.json".source =
    jsonFormat.generate "claude-settings.json" config.my.claude.settings;
}