Add skills-ref package and integrate with codex-acp

Co-authored-by: steveej <[email protected]>

Author: Copilot

packages/codex-acp/default.nix

@@ -1 +1,6 @@
-{ pkgs }: pkgs.callPackage ./package.nix { }
+{
+  pkgs,
+  perSystem,
+  ...
+}:
+pkgs.callPackage ./package.nix { inherit (perSystem.self) skills-ref; }

packages/codex-acp/package.nix

@@ -4,6 +4,8 @@
   rustPlatform,
   pkg-config,
   openssl,
+  makeWrapper,
+  skills-ref,
 }:
 rustPlatform.buildRustPackage rec {
   pname = "codex-acp";
@@ -20,6 +22,7 @@ rustPlatform.buildRustPackage rec {
 
   nativeBuildInputs = [
     pkg-config
+    makeWrapper
   ];
 
   buildInputs = [
@@ -28,6 +31,11 @@ rustPlatform.buildRustPackage rec {
 
   doCheck = false;
 
+  postInstall = ''
+    wrapProgram $out/bin/codex-acp \
+      --prefix PATH : ${lib.makeBinPath [ skills-ref ]}
+  '';
+
   passthru.category = "ACP Ecosystem";
 
   meta = with lib; {

packages/skills-ref/default.nix

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

packages/skills-ref/package.nix

@@ -0,0 +1,43 @@
+{
+  lib,
+  python3,
+  fetchFromGitHub,
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "skills-ref";
+  version = "0.1.0";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "agentskills";
+    repo = "agentskills";
+    rev = "main";
+    hash = "sha256-nZLgAd+ixQtWknKew5M9N1xr8Bo1xbTmPFSvxcYcgS4=";
+  };
+
+  sourceRoot = "source/skills-ref";
+
+  build-system = with python3.pkgs; [
+    hatchling
+  ];
+
+  dependencies = with python3.pkgs; [
+    click
+    strictyaml
+  ];
+
+  pythonImportsCheck = [ "skills_ref" ];
+
+  passthru.category = "Utilities";
+
+  meta = with lib; {
+    description = "Reference library for Agent Skills";
+    homepage = "https://github.com/agentskills/agentskills/tree/main/skills-ref";
+    license = licenses.asl20;
+    sourceProvenance = with sourceTypes; [ fromSource ];
+    maintainers = with maintainers; [ ];
+    mainProgram = "skills-ref";
+    platforms = platforms.all;
+  };
+}