diff --git a/term/.config/nvim/README.md b/term/.config/nvim/README.md
index cb92156..8c939e9 100644
--- a/term/.config/nvim/README.md
+++ b/term/.config/nvim/README.md
@@ -125,6 +125,8 @@ A feature-rich Neovim setup optimized for Python, JSON, and CSV development.
 | `K` | Show hover documentation |
 | `<leader>rn` | Rename symbol |
 | `<leader>ca` | Code actions / quick fixes |
+| `<leader>fx` | Fix diagnostic under cursor |
+| `<leader>fA` | Fix all source-level diagnostics |
 | `<leader>e` | Show diagnostic error |
 | `[d / ]d` | Previous/next diagnostic |
 
@@ -132,7 +134,7 @@ A feature-rich Neovim setup optimized for Python, JSON, and CSV development.
 
 | Keymap | Action |
 |--------|--------|
-| `<leader>f` | Format file |
+| `<leader>lf` | Format file |
 
 ### Git (Gitsigns)
 
@@ -181,7 +183,8 @@ A feature-rich Neovim setup optimized for Python, JSON, and CSV development.
 ## File Type Specifics
 
 ### Python (.py)
-- **LSP**: Full autocompletion, type checking, goto definition
+- **LSP**: Full autocompletion, type checking, goto definition, Ruff diagnostics and quick fixes
+- **Linting**: Ruff LSP (fix with `<leader>fx`, or use `<leader>fA` for fix-all actions)
 - **Formatting**: ruff format (fast), black (backup)
 - **Debugging**: Set breakpoints with `F9`, run with `F5`
 - **Indentation**: 4 spaces (Python convention)
@@ -192,6 +195,18 @@ A feature-rich Neovim setup optimized for Python, JSON, and CSV development.
 - **Indentation**: 2 spaces
 - **Folding**: JSON objects/arrays are foldable (`za` to toggle, `zM` to close all)
 
+### Markdown (.md)
+- **LSP**: Marksman for Markdown navigation and document features
+- **Linting**: markdownlint diagnostics
+- **Fixes**: `<leader>fx` or `<leader>ca` runs `markdownlint --fix` on the saved file
+- **Formatting**: Prettier via `<leader>lf`
+- **Note**: Only markdownlint rules that support automatic fixes can be changed automatically
+
+### JavaScript/TypeScript/Vue
+- **LSP**: TypeScript language features and ESLint diagnostics with quick fixes
+- **Linting**: ESLint LSP (fix with `<leader>fx`, or use `<leader>fA` for fix-all actions)
+- **Formatting**: Prettier via `<leader>lf`
+
 ### CSV (.csv)
 - **Treesitter**: Syntax highlighting
 - **No wrap**: Full row visibility
diff --git a/term/.config/nvim/init.lua b/term/.config/nvim/init.lua
index d810981..4475138 100644
--- a/term/.config/nvim/init.lua
+++ b/term/.config/nvim/init.lua
@@ -49,13 +49,78 @@ require("diff-base")
 -- ============================================================================
 -- STEP 4: LSP KEYMAPS
 -- ============================================================================
+local function fix_markdownlint()
+	local bufnr = vim.api.nvim_get_current_buf()
+	local filename = vim.api.nvim_buf_get_name(bufnr)
+	local markdownlint = vim.fn.exepath("markdownlint")
+	if markdownlint == "" then
+		markdownlint = vim.fn.stdpath("data") .. "/mason/bin/markdownlint"
+	end
+
+	if vim.fn.executable(markdownlint) == 0 then
+		vim.notify("markdownlint is not installed", vim.log.levels.WARN)
+		return
+	end
+
+	if filename == "" then
+		vim.notify("Save the Markdown buffer before fixing it", vim.log.levels.WARN)
+		return
+	end
+
+	vim.cmd.write()
+	vim.fn.jobstart({ markdownlint, "--fix", filename }, {
+		buffer = bufnr,
+		on_exit = function(_, exit_code)
+			vim.schedule(function()
+				if exit_code ~= 0 then
+					vim.notify("markdownlint could not fix this file", vim.log.levels.WARN)
+					return
+				end
+
+				vim.cmd.checktime()
+				vim.notify("markdownlint fixes applied", vim.log.levels.INFO)
+				vim.defer_fn(function()
+					require("lint").try_lint()
+				end, 100)
+			end)
+		end,
+	})
+end
+
 vim.keymap.set("n", "gd", vim.lsp.buf.definition, { desc = "Go to definition" })
 vim.keymap.set("n", "gD", vim.lsp.buf.declaration, { desc = "Go to declaration" })
 vim.keymap.set("n", "gi", vim.lsp.buf.implementation, { desc = "Go to implementation" })
 vim.keymap.set("n", "gr", vim.lsp.buf.references, { desc = "Show references" })
 vim.keymap.set("n", "K", vim.lsp.buf.hover, { desc = "Show hover docs" })
 vim.keymap.set("n", "<leader>rn", vim.lsp.buf.rename, { desc = "Rename symbol" })
-vim.keymap.set("n", "<leader>ca", vim.lsp.buf.code_action, { desc = "Code actions" })
+vim.keymap.set("n", "<leader>ca", function()
+	if vim.bo.filetype == "markdown" then
+		fix_markdownlint()
+		return
+	end
+	vim.lsp.buf.code_action()
+end, { desc = "Code actions / Markdown fixes" })
+vim.keymap.set("n", "<leader>fx", function()
+	if vim.bo.filetype == "markdown" then
+		fix_markdownlint()
+		return
+	end
+	vim.lsp.buf.code_action({
+		context = {
+			diagnostics = vim.diagnostic.get(0, {
+				lnum = vim.fn.line(".") - 1,
+			}),
+		},
+	})
+end, { desc = "Fix diagnostic" })
+vim.keymap.set("n", "<leader>fA", function()
+	vim.lsp.buf.code_action({
+		apply = true,
+		context = {
+			only = { "source.fixAll" },
+		},
+	})
+end, { desc = "Fix all diagnostics" })
 vim.keymap.set("n", "<leader>e", vim.diagnostic.open_float, { desc = "Show diagnostic" })
 
 vim.diagnostic.config({
@@ -138,4 +203,3 @@ vim.keymap.set("n", "<leader>ch", ":noh<CR>", { desc = "clear search highlightin
 
 -- toggle word wrap
 vim.keymap.set("n", "<leader>tw", ":set wrap!<CR>", { desc = "toggle word wrap" })
-
diff --git a/term/.config/nvim/lua/plugins/lsp-config.lua b/term/.config/nvim/lua/plugins/lsp-config.lua
index a0ef7b0..be7c750 100644
--- a/term/.config/nvim/lua/plugins/lsp-config.lua
+++ b/term/.config/nvim/lua/plugins/lsp-config.lua
@@ -44,10 +44,13 @@ return {
 			require("mason-lspconfig").setup({
 				ensure_installed = {
 					"pyright", -- Python
+					"ruff", -- Python linting and fixes
+					"eslint", -- JavaScript/TypeScript linting and fixes
 					"ts_ls", -- TypeScript/JavaScript
 					"vue_ls", -- Vue (Volar)
 					"jsonls", -- JSON
 					"yamlls", -- YAML
+					"marksman", -- Markdown
 					"html", -- HTML
 					"cssls", -- CSS
 					"bashls", -- Bash
@@ -97,6 +100,25 @@ return {
 				},
 			})
 
+			-- Ruff provides Python lint diagnostics and quick fixes.
+			vim.lsp.config("ruff", {
+				filetypes = { "python" },
+			})
+
+			-- ESLint provides lint diagnostics and source-level fixes.
+			vim.lsp.config("eslint", {
+				filetypes = {
+					"javascript",
+					"javascriptreact",
+					"typescript",
+					"typescriptreact",
+					"vue",
+				},
+				settings = {
+					workingDirectory = { mode = "auto" },
+				},
+			})
+
 			-- Type- and JavaScript
 			vim.lsp.config("ts_ls", {
 				filetypes = {
@@ -160,6 +182,7 @@ return {
 			-- Other languages
 			vim.lsp.config("jsonls", {})
 			vim.lsp.config("yamlls", {})
+			vim.lsp.config("marksman", {})
 			vim.lsp.config("html", {})
 			vim.lsp.config("cssls", {})
 			vim.lsp.config("bashls", {})
@@ -167,10 +190,13 @@ return {
 			-- Enable servers
 			vim.lsp.enable("lua_ls")
 			vim.lsp.enable("pyright")
+			vim.lsp.enable("ruff")
+			vim.lsp.enable("eslint")
 			vim.lsp.enable("ts_ls")
 			vim.lsp.enable("vue_ls")
 			vim.lsp.enable("jsonls")
 			vim.lsp.enable("yamlls")
+			vim.lsp.enable("marksman")
 			vim.lsp.enable("html")
 			vim.lsp.enable("cssls")
 			vim.lsp.enable("bashls")
diff --git a/term/.config/nvim/lua/plugins/nvim-lint.lua b/term/.config/nvim/lua/plugins/nvim-lint.lua
index 28d3d2c..9d0b2d9 100644
--- a/term/.config/nvim/lua/plugins/nvim-lint.lua
+++ b/term/.config/nvim/lua/plugins/nvim-lint.lua
@@ -2,12 +2,6 @@ return {
 	"mfussenegger/nvim-lint",
 	config = function()
 		require("lint").linters_by_ft = {
-			javascript = { "eslint_d" },
-			javascriptreact = { "eslint_d" },
-			typescript = { "eslint_d" },
-			typescriptreact = { "eslint_d" },
-			vue = { "eslint_d" },
-			python = { "ruff" },
 			-- lua = { "selene" }, -- Disabled: lua_ls provides diagnostics
 			sh = { "shellcheck" },
 			bash = { "shellcheck" },
@@ -17,7 +11,7 @@ return {
 			rust = { "clippy" },
 		}
 
-		vim.api.nvim_create_autocmd({ "BufWritePost" }, {
+		vim.api.nvim_create_autocmd({ "BufWritePost", "BufEnter", "InsertLeave" }, {
 			callback = function()
 				require("lint").try_lint()
 			end,