Revert "Populate PATH files to discover installed CLIs"

This reverts commit 18d88781a88b8781913cf5a8b680dfb38eabf7e4.

nix/home-manager.nix

@@ -55,41 +55,10 @@
     }
   '';
 
-  # systemd --user units (and macOS launchd agents) start with a minimal
-  # default PATH that excludes Home Manager and NixOS user-profile bin
-  # directories. The daemon scans `process.env.PATH` for agent CLIs, so
-  # without an explicit PATH the UI reports "no agents detected" even when
-  # claude / codex / opencode / ... are installed.
-  #
-  # `${config.home.profileDirectory}/bin` covers both standalone HM
-  # (~/.nix-profile/bin) and HM-as-NixOS-module (/etc/profiles/per-user/<u>/bin).
-  # The remaining Linux entries pick up wrappers, the system profile, and
-  # the default Nix profile. Darwin gets the standard launchd PATH.
-  daemonPathEntries =
-    ["${config.home.profileDirectory}/bin"]
-    ++ lib.optionals pkgs.stdenv.isLinux [
-      "/run/wrappers/bin"
-      "/etc/profiles/per-user/${config.home.username}/bin"
-      "/run/current-system/sw/bin"
-      "/nix/var/nix/profiles/default/bin"
-      "/usr/local/bin"
-      "/usr/bin"
-      "/bin"
-    ]
-    ++ lib.optionals pkgs.stdenv.isDarwin [
-      "/usr/local/bin"
-      "/usr/bin"
-      "/bin"
-      "/usr/sbin"
-      "/sbin"
-    ]
-    ++ cfg.extraBinPaths;
-
   daemonEnv =
     {
       OD_PORT = toString cfg.port;
       OD_DATA_DIR = toString cfg.dataDir;
-      PATH = lib.concatStringsSep ":" daemonPathEntries;
     }
     // cfg.extraEnv;
 

nix/module-common.nix

@@ -27,14 +27,9 @@
     "copilot"
   ];
 
-  # `pkgs.system` is a legacy alias removed when consumers set
-  # `nixpkgs.config.allowAliases = false`. Use the canonical attribute
-  # path so the module evaluates under both default and strict configs.
-  systemAttr = pkgs.stdenv.hostPlatform.system;
-
   flakePackages =
-    if flake ? packages.${systemAttr}
-    then flake.packages.${systemAttr}
+    if flake ? packages.${pkgs.system}
+    then flake.packages.${pkgs.system}
     else {};
 in {
   enable = lib.mkEnableOption "Open Design — local-first design product daemon";
@@ -43,7 +38,7 @@ in {
     type = lib.types.package;
     default =
       flakePackages.daemon or (throw
-        "open-design: no daemon package available for ${systemAttr}; set services.open-design.package explicitly");
+        "open-design: no daemon package available for ${pkgs.system}; set services.open-design.package explicitly");
     defaultText = lib.literalExpression "open-design.packages.\${pkgs.system}.daemon";
     description = "The Open Design daemon package providing the `od` binary.";
   };
@@ -115,27 +110,6 @@ in {
     '';
   };
 
-  extraBinPaths = lib.mkOption {
-    type = lib.types.listOf lib.types.str;
-    default = [];
-    description = ''
-      Extra absolute directories to prepend to the daemon service's
-      PATH. The daemon discovers agent CLIs (claude, codex, gemini,
-      opencode, ...) by scanning `process.env.PATH` at runtime, but
-      systemd unit and macOS launchd agent invocations launch with a
-      minimal default PATH that excludes Home Manager / NixOS user
-      profiles — so without entries here the daemon will report
-      "no agents detected" even when the CLIs are installed.
-
-      Both modules pre-populate PATH with sensible defaults for their
-      context (Home Manager: the user's HM profile and, on NixOS, the
-      per-user/system profile dirs; NixOS: the system profile and
-      wrapper dirs). Use this option to add additional locations
-      (custom installs under `/opt`, project-local `bin/`, etc.).
-    '';
-    example = lib.literalExpression ''[ "/opt/agents/bin" ]'';
-  };
-
   agents = lib.mkOption {
     type = lib.types.listOf (lib.types.enum supportedAgents);
     default = [];
@@ -191,7 +165,7 @@ in {
       type = lib.types.package;
       default =
         flakePackages.web or (throw
-          "open-design: no web package available for ${systemAttr}; set services.open-design.webFrontend.package explicitly");
+          "open-design: no web package available for ${pkgs.system}; set services.open-design.webFrontend.package explicitly");
       defaultText = lib.literalExpression "open-design.packages.\${pkgs.system}.web";
       description = "Built static export to serve (Next.js out/ tree).";
     };

nix/nixos.nix

@@ -57,29 +57,10 @@
     LockPersonality = true;
   };
 
-  # System systemd units launch with a minimal default PATH that excludes
-  # NixOS profile dirs where agent CLIs live. The daemon scans
-  # `process.env.PATH` to discover them, so an explicit PATH is required
-  # or the UI reports "no agents detected". The service runs as a system
-  # user, so per-user profile dirs aren't included by default — operators
-  # who install agents into a specific location should add it via
-  # `services.open-design.extraBinPaths`.
-  daemonPathEntries =
-    [
-      "/run/wrappers/bin"
-      "/run/current-system/sw/bin"
-      "/nix/var/nix/profiles/default/bin"
-      "/usr/local/bin"
-      "/usr/bin"
-      "/bin"
-    ]
-    ++ cfg.extraBinPaths;
-
   daemonEnvironment =
     {
       OD_PORT = toString cfg.port;
       OD_DATA_DIR = toString cfg.dataDir;
-      PATH = lib.concatStringsSep ":" daemonPathEntries;
     }
     // cfg.extraEnv;