{
  description = "eve-agent — eve.dev agent for eve.boxd.sh";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs { inherit system; };
        # Runtime CLIs for radio / stream-watch / YouTube (av-bridge demux).
        mediaTools = pkgs.symlinkJoin {
          name = "eve-media-tools";
          paths = [
            pkgs.ffmpeg
            pkgs.yt-dlp
          ];
        };
      in
      {
        packages = {
          media-tools = mediaTools;
          default = mediaTools;
        };

        apps.media-tools = {
          type = "app";
          program = "${mediaTools}/bin/ffmpeg";
        };

        devShells.default = pkgs.mkShell {
          packages = [
            pkgs.nodejs_24
            pkgs.typescript
            pkgs.curl
            pkgs.jq
            pkgs.ffmpeg
            pkgs.yt-dlp
          ];

          shellHook = ''
            echo "eve-agent dev shell"
            echo "  npm install   # install deps"
            echo "  npm run dev   # local eve (needs model API keys in env)"
            echo "  npm run typecheck"
            echo "  npm run boxd:start  # OpenBao key bridge + eve on :8000"
            echo "  media: ffmpeg=$(command -v ffmpeg) yt-dlp=$(command -v yt-dlp)"
          '';
        };

        formatter = pkgs.nixfmt-rfc-style;
      }
    );
}