update to nixvim scala metals and copilot configs

.claude/settings.local.json

@@ -0,0 +1,10 @@
+{
+  "permissions": {
+    "allow": [
+      "WebFetch(domain:github.com)",
+      "WebFetch(domain:raw.githubusercontent.com)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

programs/nixvim/README.md

@@ -230,6 +230,15 @@ Adjust these in `options.nix` and `completion.nix` respectively.
 | `<leader>j` | Normal | Next diagnostic |
 | `<leader>k` | Normal | Previous diagnostic |
 
+### Metals (Scala Development)
+
+| Key | Mode | Action |
+|-----|------|--------|
+| `<leader>ws` | Normal | Hover Metals Worksheet |
+| `<leader>sm` | Normal | Telescope Metals Commands |
+| `<leader>tt` | Normal | Toggle tree view |
+| `<leader>tr` | Normal | Reveal in tree |
+
 ### Terminal (Floaterm)
 
 | Key | Mode | Action |

programs/nixvim/autocommands.nix

@@ -30,5 +30,12 @@
       pattern = ["swift" "json" "lua" "nix"];
       command = "setlocal shiftwidth=2 tabstop=2 softtabstop=2 expandtab";
     }
+
+    # Metals (Scala) - Refresh codelens
+    {
+      event = ["BufEnter" "CursorHold" "InsertLeave"];
+      pattern = ["*.scala" "*.sbt" "*.java"];
+      command = "lua vim.lsp.codelens.refresh()";
+    }
   ];
 }

programs/nixvim/keymappings.nix

@@ -30,6 +30,11 @@
               "<C-Right>" = ":vertical resize -2<CR>";
               "<M-k>" = ":move-2<CR>";
               "<M-j>" = ":move+<CR>";
+              # Metals (Scala) keybindings
+              "<leader>ws" = "<cmd>lua require('metals').hover_worksheet()<CR>";
+              "<leader>sm" = "<cmd>lua require('telescope').extensions.metals.commands()<CR>";
+              "<leader>tt" = "<cmd>lua require('metals.tvp').toggle_tree_view()<CR>";
+              "<leader>tr" = "<cmd>lua require('metals.tvp').reveal_in_tree()<CR>";
             };
         visual =
           lib.mapAttrsToList

programs/nixvim/plugins/ai.nix

@@ -4,14 +4,33 @@
   programs.nixvim = {
     plugins = {
       # GitHub Copilot
-      copilot-vim.enable = true;
+      copilot-vim = {
+        enable = true;
+      };
 
       # Avante AI assistant (imported from separate file)
       # avante config is in avante.nix
     };
 
     globals = {
-      copilot_node_command = lib.mkForce "${pkgs.nodejs-slim}/bin/node";
+      copilot_node_command = lib.mkForce "${pkgs.nodejs}/bin/node";
+      copilot_no_tab_map = true;
+      copilot_assume_mapped = true;
     };
+
+    # Copilot keymapping - use Ctrl+J to accept suggestion
+    keymaps = [
+      {
+        mode = "i";
+        key = "<C-J>";
+        action = "copilot#Accept(\"\\<CR>\")";
+        options = {
+          silent = true;
+          script = true;
+          expr = true;
+          replace_keycodes = false;
+        };
+      }
+    ];
   };
-}
+}

programs/nixvim/plugins/lsp/servers.nix

@@ -52,7 +52,33 @@
       marksman.enable = true;
 
       # Scala
-      metals.enable = true;
+      metals = {
+        enable = true;
+        settings.settings = {
+          bloopSbtAlreadyInstalled = true;
+          defaultBspToBuildTool = true;
+          enableBestEffort = true;
+          excludedPackages = [
+            "akka.actor.typed.javadsl"
+            "com.github.swagger.akka.javadsl"
+          ];
+          initOptions = {
+            statusBarProvider = "on";
+          };
+          inlayHints = {
+            typeParameters.enable = true;
+            hintsInPatternMatch.enable = true;
+          };
+          mcpClient = "claude";
+          serverVersion = "latest.snapshot";
+          showImplicitArguments = true;
+          showImplicitConversionsAndClasses = true;
+          showInferredType = true;
+          startMcpServer = true;
+          superMethodLensesEnabled = true;
+          useGlobalExecutable = true;
+        };
+      };
 
       # Nix
       nil_ls.enable = true;
@@ -76,4 +102,4 @@
       tinymist.enable = true;
     };
   };
-}
+}