fix nix functional test & add mole to brew, del osgrep bd

packages/default.nix

@@ -4,8 +4,5 @@ let
   system = pkgs.stdenv.hostPlatform.system;
   llmPkgs = llm-agents.packages.${system};
 in {
-  osgrep = pkgs.callPackage ./osgrep.nix { };
   opencode = llmPkgs.opencode;
-  # Source beads from llm-agents.nix
-  beads = llmPkgs.beads;
 }

packages/osgrep.nix

@@ -1,32 +0,0 @@
-{ lib, buildNpmPackage, fetchurl, python3 }:
-
-buildNpmPackage rec {
-  pname = "osgrep";
-  version = "0.5.16";
-
-  src = fetchurl {
-    url = "https://registry.npmjs.org/${pname}/-/${pname}-${version}.tgz";
-    hash = "sha256-V23PNxtMCdRaqr4uDOs0rptmSROUrUO7I9HazoGqUCQ=";
-  };
-
-  sourceRoot = "package";
-
-  postPatch = ''
-    cp ${./osgrep-package-lock.json} package-lock.json
-  '';
-
-  npmDepsHash = "sha256-JDeZ3kcsbcZM//0846i1gsvoAgMpIpN8c160cp7wB5s=";
-
-  npmFlags = [ "--legacy-peer-deps" ];
-
-  dontNpmBuild = true; # Already built in npm package
-
-  nativeBuildInputs = [ python3 ];
-
-  meta = {
-    description = "Semantic grep for AI agents";
-    homepage = "https://github.com/Ryandonofrio3/osgrep";
-    license = lib.licenses.asl20;
-    mainProgram = "osgrep";
-  };
-}