feat: add container-use package and fix goose-cli libclang dependency

- Add dagger/container-use (v0.4.2) for containerized coding agent environments
- Fix goose-cli build by adding llvmPackages.libclang for bindgen
- Clean up skillsmcp package (remove custom fastmcp override, use nixos-unstable)
- Remove broken update.py script from goose-cli
- Add treefmt.toml for consistent formatting
- Update README with all current packages

packages/container-use/default.nix

@@ -0,0 +1 @@
+{ pkgs, ... }: pkgs.callPackage ./package.nix { }

packages/container-use/package.nix

@@ -0,0 +1,38 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+}:
+
+buildGoModule rec {
+  pname = "container-use";
+  version = "0.4.2";
+
+  src = fetchFromGitHub {
+    owner = "dagger";
+    repo = "container-use";
+    rev = "v${version}";
+    hash = "sha256-YKgS142a9SL1ZEjS+VArxwUzQX961zwlGuHW43AMxQA=";
+  };
+
+  vendorHash = "sha256-M7YhEm9Gmjv2gxB2r7AS5JLLThEkvtJfLBrB+cvsN5c=";
+
+  env.CGO_ENABLED = 0;
+
+  subPackages = [ "cmd/container-use" ];
+
+  doCheck = false;
+
+  ldflags = [
+    "-s -w -X main.version=v${version}"
+  ];
+
+  meta = with lib; {
+    description = "Containerized environments for coding agents";
+    homepage = "https://github.com/dagger/container-use";
+    changelog = "https://github.com/dagger/container-use/releases/tag/v${version}";
+    license = licenses.asl20;
+    mainProgram = "container-use";
+    platforms = platforms.linux ++ platforms.darwin;
+  };
+}

packages/skillsmcp/default.nix

@@ -1,4 +1 @@
-{ pkgs, ... }:
-pkgs.callPackage ./package.nix {
-  fastmcp = pkgs.callPackage ./fastmcp.nix { };
-}
+{ pkgs, ... }: pkgs.callPackage ./package.nix { }

packages/skillsmcp/fastmcp.nix

@@ -1,7 +0,0 @@
-{ python3Packages }:
-
-# Use fastmcp from nixpkgs but disable tests
-python3Packages.fastmcp.overrideAttrs (old: {
-  doCheck = false;
-  doInstallCheck = false;
-})

packages/skillsmcp/package.nix

@@ -2,7 +2,6 @@
   lib,
   python3Packages,
   fetchFromGitHub,
-  fastmcp,
 }:
 
 python3Packages.buildPythonApplication rec {
@@ -22,7 +21,7 @@ python3Packages.buildPythonApplication rec {
   ];
 
   dependencies = [
-    fastmcp
+    python3Packages.fastmcp
     python3Packages.pyyaml
   ];
 
@@ -30,12 +29,6 @@ python3Packages.buildPythonApplication rec {
   doCheck = false;
   pythonImportsCheck = [ "skillsmcp" ];
 
-  # Patch to accept fastmcp 2.x from nixpkgs
-  postPatch = ''
-    # Replace version requirement in pyproject.toml
-    sed -i 's/"fastmcp>=3.0.0"/"fastmcp>=2.0"/' pyproject.toml
-  '';
-
   passthru.category = "MCP Servers";
 
   meta = with lib; {