opencode: fix opencode plugins and anthropic

home-manager/progs/opencode.nix

@@ -39,10 +39,13 @@ let
       writing.model = "openrouter/google/gemini-3-flash-preview";
     };
   };
+  oh-my-opencode-pkg = inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.oh-my-opencode;
+
+  anthropic-user-agent-plugin = inputs.opencode-anthropic-user-agent-plugin;
 in
 {
   home.packages = [
-    inputs.llm-agents.packages.${pkgs.stdenv.hostPlatform.system}.oh-my-opencode
+    oh-my-opencode-pkg
     pkgs.playwright-driver.browsers
   ];
 
@@ -53,6 +56,13 @@ in
 
   xdg.configFile."opencode/oh-my-opencode.json".text = builtins.toJSON ohMyOpencodeConfig;
 
+  # Plugins are placed directly in the plugins directory so opencode
+  # auto-discovers them instead of downloading them from npm at runtime.
+  xdg.configFile."opencode/plugins/oh-my-opencode.js".source =
+    "${oh-my-opencode-pkg}/lib/oh-my-opencode/dist/index.js";
+  xdg.configFile."opencode/plugins/opencode-anthropic-user-agent-plugin.js".source =
+    "${anthropic-user-agent-plugin}/index.js";
+
   xdg.configFile."opencode/skills/playwright.md".text =
     let
       browsers = pkgs.playwright-driver.browsers;
@@ -166,11 +176,8 @@ in
       small_model = "openrouter/openai/gpt-oss-20b:free";
 
       autoshare = false;
-      # note: this updates opencode (and plugins like oh-my-opencode) at launch,
-      # bypassing the version pinned in flake.lock
-      autoupdate = true;
+      autoupdate = false;
       agent = { };
-      plugin = [ "oh-my-opencode" ];
       provider = {
         openrouter = {
           models = {