fix ruff/Ruff duplication

lua/keymaps.lua

@@ -33,3 +33,16 @@ map('n', 'K', function()
     vim.cmd("normal! K")
   end
 end, { desc = 'Hover/Help (LSP or keywordprg fallback)', silent = true })
+
+-- Diagnostic keymaps
+map('n', '<leader>xx', vim.diagnostic.setloclist, { desc = 'Show buffer diagnostics in location list', silent = true })
+map('n', '<leader>xX', vim.diagnostic.setqflist, { desc = 'Show all diagnostics in quickfix', silent = true })
+map('n', '<leader>xe', function()
+  vim.diagnostic.setloclist({ severity = vim.diagnostic.severity.ERROR })
+end, { desc = 'Show buffer errors in location list', silent = true })
+map('n', '<leader>xE', function()
+  vim.diagnostic.setqflist({ severity = vim.diagnostic.severity.ERROR })
+end, { desc = 'Show all errors in quickfix', silent = true })
+map('n', '[d', vim.diagnostic.goto_prev, { desc = 'Go to previous diagnostic', silent = true })
+map('n', ']d', vim.diagnostic.goto_next, { desc = 'Go to next diagnostic', silent = true })
+map('n', '<leader>xd', vim.diagnostic.open_float, { desc = 'Show diagnostic under cursor', silent = true })

lua/plugins/lsp.lua

@@ -7,6 +7,16 @@ return {
   config = function()
     local capabilities = require("cmp_nvim_lsp").default_capabilities()
 
+    -- Disable ruff LSP entirely (we use ruff via nvim-lint + none-ls instead)
+    vim.api.nvim_create_autocmd("LspAttach", {
+      callback = function(args)
+        local client = vim.lsp.get_client_by_id(args.data.client_id)
+        if client and client.name == "ruff" then
+          vim.lsp.stop_client(client.id)
+        end
+      end,
+    })
+
     -- Load project-local LSP settings from .nvim.lua
     local function load_project_lsp_settings(server_name, root_dir)
       if not root_dir then

lua/plugins/mason-tool-installer.lua

@@ -10,14 +10,14 @@ return {
         -- Formatters
         "prettier",  -- JS, TS, CSS, JSON, Markdown, HTML
         "stylua",    -- Lua
-        "black",     -- Python
+        "ruff",      -- Python (formatter + linter in one)
         -- Note: phpcbf already installed globally
 
         -- Linters
         "eslint_d",      -- JS, TS (daemon version for speed)
         "markdownlint",  -- Markdown
-        "ruff",          -- Python (fast linter + import sorter)
         -- Note: phpcs already installed globally
+        -- Note: ruff also does linting (listed above)
       },
       auto_update = false,
       run_on_start = true,

lua/plugins/none-ls.lua

@@ -45,6 +45,17 @@ return {
 
     -- Note: Diagnostics (linters) moved to nvim-lint plugin
 
+    -- Custom ruff formatter (ruff format subcommand)
+    local ruff_format = {
+      method = null_ls.methods.FORMATTING,
+      filetypes = { "python" },
+      generator = null_ls.formatter({
+        command = find_executable({ "ruff" }) or "ruff",
+        args = { "format", "--stdin-filename", "$FILENAME", "-" },
+        to_stdin = true,
+      }),
+    }
+
     null_ls.setup({
       sources = {
         -- Prettier (JS, TS, CSS, SCSS, JSON, Markdown, HTML)
@@ -75,10 +86,8 @@ return {
           command = find_executable({ "stylua" }),
         }),
 
-        -- black (Python)
-        formatting.black.with({
-          command = find_executable({ "black" }),
-        }),
+        -- ruff (Python formatter - custom since not in builtins)
+        ruff_format,
       },
 
       -- Format on save

lua/plugins/nvim-lint.lua

@@ -15,7 +15,7 @@ return {
       typescriptreact = { "eslint_d" },
       markdown = { "markdownlint" },
       php = { "phpcs" },
-      python = { "ruff" },
+      python = { "ruff" },  -- Code quality/style checks (pyright handles types)
     }
 
     -- Helper: Find project-local executable, fallback to global
@@ -69,8 +69,18 @@ return {
     -- Configure markdownlint
     lint.linters.markdownlint.cmd = find_executable({ "markdownlint" }) or "markdownlint"
 
-    -- Configure ruff for Python
+    -- Configure ruff for Python linting (separate from formatting)
     lint.linters.ruff.cmd = find_executable({ "ruff" }) or "ruff"
+    lint.linters.ruff.args = {
+      "check",
+      "--select", "ALL",  -- All rules
+      "--ignore", "E501,E999",  -- Ignore line length (formatter handles) and syntax errors (pyright handles)
+      "--force-exclude",
+      "--quiet",
+      "--output-format", "json",
+      "--stdin-filename", function() return vim.api.nvim_buf_get_name(0) end,
+      "-",
+    }
 
     -- Auto-lint on these events
     local lint_augroup = vim.api.nvim_create_augroup("lint", { clear = true })