Add opencode agent

hm/mcp.nix

@@ -1,5 +1,6 @@
 {
-  programs.mcp = {
+  programs = {
+    mcp = {
       enable = true;
       servers = {
         mcp-nixos = {
@@ -8,4 +9,57 @@
         };
       };
     };
+
+    opencode = {
+      enable = true;
+      enableMcpIntegration = true;
+      settings = {
+        provider.ollama = {
+          npm = "@ai-sdk/openai-compatible";
+          name = "Ollama (local)";
+          options.baseURL = "http://localhost:11434/v1";
+          models = {
+            "mashriram/gemma3nTools:e4b".name = "gemma3nTools:e4b";
+            "mashriram/gemma3nTools:e2b".name = "gemma3nTools:e2b";
+            "MFDoom/deepseek-r1-tool-calling:8b".name = "deepseek-r1-tool-calling:8b";
+            "MFDoom/deepseek-r1-tool-calling:14b".name = "deepseek-r1-tool-calling:14b";
+            "deepseek-r1:14b".name = "deepseek-r1:14b";
+            "deepseek-r1:8b".name = "deepseek-r1:8b";
+            "gemma3n:e2b".name = "gemma3n:e2b";
+            "gemma3:latest".name = "gemma3:latest";
+            "qwen3:4b".name = "qwen3:4b";
+            "qwen3-vl:4b".name = "qwen3-vl:4b";
+            "qwen3-vl:8b".name = "qwen3-vl:8b";
+            "qwen3:14b".name = "qwen3:14b";
+            "qwen3:8b".name = "qwen3:8b";
+            "gemma3:12b".name = "gemma3:12b";
+            "gemma3n:e4b".name = "gemma3n:e4b";
+            "granite3.3:8b".name = "granite3.3:8b";
+            "glm-4.6:cloud".name = "glm-4.6:cloud";
+          };
+        };
+
+        tools = {
+          bash = true;
+          edit = true;
+          write = true;
+          read = true;
+          grep = true;
+          glob = true;
+          list = true;
+          patch = true;
+          todowrite = true;
+          todoread = true;
+          webfetch = true;
+        };
+
+        lsp = {
+          python = {
+            command = [ "ruff" "server" ];
+            extensions = [ ".py" ];
+          };
+        };
+      };
+    };
+  };
 }