Add opencode module

modules/ai/opencode.nix

@@ -0,0 +1,74 @@
+{
+  inputs,
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  cfg = config.modules.ai.opencode;
+in
+{
+  options.modules.ai.opencode = {
+    enable = lib.my.mkBoolOpt false;
+  };
+  config = lib.mkIf cfg.enable {
+    home-manager.users.${config.user.name} =
+      { ... }:
+      {
+        programs.opencode = {
+          enable = true;
+          package = inputs.llm-agents.packages.${pkgs.system}.opencode;
+          settings = {
+            model = "glm_4_5_air";
+            permission = {
+              bash = "ask";
+              edit = "ask";
+            };
+            provider = {
+              vllm = {
+                npm = "@ai-sdk/openai-compatible";
+                name = "vLLM";
+                options = {
+                  baseURL = "http://model1.lefoyer.lu:8030/v1";
+                  apiKey = "dummy";
+                };
+                models = {
+                  glm_4_5_air = {
+                    name = "GLM 4.5 Air (local)";
+                    temperature = true;
+                    default = true;
+                  };
+                };
+              };
+            };
+            agent = {
+              build = {
+                mode = "primary";
+                temperature = 0.4;
+              };
+              plan = {
+                mode = "primary";
+                temperature = 0.4;
+              };
+            };
+            lsp = {
+              metals = {
+                command = [ "${pkgs.metals}/bin/metals" ];
+                extensions = [
+                  ".scala"
+                  ".sbt"
+                  ".sc"
+                ];
+                initialization = {
+                  statusBarProvider = "log-message";
+                  doctorProvider = "json";
+                };
+              };
+            };
+          };
+        };
+      };
+  };
+}