refactor(treesitter): use native neovim APIs

README.md

@@ -1,6 +1,6 @@
 # Neovim Configuration
 
-Portable Neovim configuration using lazy.nvim, Mason-managed tooling, native LSP, Treesitter, Telescope, and DAP (Neovim 0.11+, tested on 0.12.1).
+Portable Neovim configuration using lazy.nvim, Mason-managed tooling, native LSP, native Treesitter, Telescope, and DAP (Neovim 0.11+, tested on 0.12.1).
 
 ## Installation
 
@@ -19,8 +19,8 @@ git clone --recurse-submodules git@github.com:itme-brain/nixos.git
 - **Native LSP** (`vim.lsp.config` / `vim.lsp.enable`) - no manual server list needed
 - **Smart LSP picker** (`<leader>css`) - auto-detects installed servers for current filetype
 - **Neovim 0.12 compatible** - uses built-in `:lsp` commands and keeps legacy `:Lsp*` aliases working
-- **Portable** - Mason is the source of truth for LSP servers, debug adapters, and tree-sitter-cli
-- **Treesitter** - starts via Neovim's native `vim.treesitter.start`
+- **Portable** - Mason is the source of truth for LSP servers and debug adapters
+- **Treesitter** - uses Neovim's native `vim.treesitter.*` APIs without `nvim-treesitter`
 - **Debugging** - lazy-loaded `nvim-dap` stack with Mason-managed adapters
 
 ## LSP Setup
@@ -43,10 +43,14 @@ On Neovim 0.12+, start/stop/restart uses the built-in `:lsp` commands under the
 
 ## Treesitter
 
-Treesitter uses the current `nvim-treesitter` main branch API:
-- Parsers are installed with `nvim-treesitter`
+Treesitter uses Neovim's native API:
 - Highlighting starts through `vim.treesitter.start`
-- `tree-sitter-cli` is bootstrapped through Mason when needed for parser installs/updates
+- Parser/filetype mappings use `vim.treesitter.language.register`
+- Parser and query installation is intentionally outside lazy.nvim and Mason
+
+Neovim loads compiled parser libraries from `parser/` directories on `runtimepath` and query files from `queries/<language>/`.
+`tree-sitter-cli` is only needed by tools that generate or compile parsers from grammar sources; it is not required at runtime for highlighting.
+Prefer providing parsers and queries through Neovim's runtime or a reproducible system/development environment.
 
 ## Debugging
 
@@ -94,7 +98,7 @@ Mason installs:
 - **nvim-lspconfig** - LSP configurations
 - **nvim-cmp** - completion
 - **telescope.nvim** - fuzzy finder
-- **nvim-treesitter** - syntax highlighting
+- **Native Treesitter** - syntax highlighting
 - **nvim-dap** - debug adapter client
 - **nvim-dap-ui** - debugging UI panes
 - **mason-nvim-dap.nvim** - Mason debug adapter integration

lazy-lock.json

@@ -12,13 +12,11 @@
   "mason.nvim": { "branch": "main", "commit": "cb8445f8ce85d957416c106b780efd51c6298f89" },
   "nvim-dap": { "branch": "master", "commit": "45a69eba683a2c448dd9ecfc4de89511f0646b5f" },
   "nvim-lspconfig": { "branch": "master", "commit": "31026a13eefb20681124706a79fc1df6bf11ab27" },
-  "nvim-treesitter": { "branch": "main", "commit": "4916d6592ede8c07973490d9322f187e07dfefac" },
   "nvim-web-devicons": { "branch": "master", "commit": "4fc505ac7bd7692824a142e96e5f529c133862f8" },
   "oil.nvim": { "branch": "master", "commit": "0fcc83805ad11cf714a949c98c605ed717e0b83e" },
   "pi.nvim": { "branch": "main", "commit": "6e86a704ed6ff488fda78b64f4e564d6ee620785" },
   "plenary.nvim": { "branch": "master", "commit": "74b06c6c75e4eeb3108ec01852001636d85a932b" },
   "render-markdown.nvim": { "branch": "main", "commit": "3f3eea97b80839f629c951ca660ffd125bfa5b34" },
   "todo-comments.nvim": { "branch": "main", "commit": "31e3c38ce9b29781e4422fc0322eb0a21f4e8668" },
-  "treesitter-parser-registry": { "branch": "main", "commit": "6eb15358bb9fc88f0d3401d8538d56652e9bdf3c" },
   "which-key.nvim": { "branch": "main", "commit": "3aab2147e74890957785941f0c1ad87d0a44c15a" }
 }

lua/config/treesitter.lua

@@ -0,0 +1,46 @@
+local treesitter_filetypes = {
+  "lua",
+  "c",
+  "cpp",
+  "python",
+  "nix",
+  "rust",
+  "bash",
+  "markdown",
+  "html",
+  "javascript",
+  "javascriptreact",
+  "css",
+  "vim",
+  "gitconfig",
+  "gitrebase",
+  "gitattributes",
+  "gitcommit",
+  "gitignore",
+}
+
+local language_by_filetype = {
+  gitconfig = "git_config",
+  gitrebase = "git_rebase",
+  javascriptreact = "javascript",
+}
+
+for filetype, language in pairs(language_by_filetype) do
+  vim.treesitter.language.register(language, filetype)
+end
+
+vim.api.nvim_create_autocmd("FileType", {
+  group = vim.api.nvim_create_augroup("config_treesitter", { clear = true }),
+  pattern = treesitter_filetypes,
+  callback = function(event)
+    local language = vim.treesitter.language.get_lang(vim.bo[event.buf].filetype)
+    if not language then
+      return
+    end
+
+    local ok, has_parser = pcall(vim.treesitter.language.add, language)
+    if ok and has_parser then
+      pcall(vim.treesitter.start, event.buf, language)
+    end
+  end,
+})

lua/plugins/lsp.lua

@@ -14,182 +14,7 @@ local mason_ensure_installed = {
   "yamlls",       -- YAML
 }
 
-local treesitter_parsers = {
-  "lua",
-  "c",
-  "cpp",
-  "python",
-  "nix",
-  "rust",
-  "bash",
-  "markdown",
-  "markdown_inline",
-  "html",
-  "javascript",
-  "css",
-  "vim",
-  "git_config",
-  "git_rebase",
-  "gitattributes",
-  "gitcommit",
-  "gitignore",
-}
-
 return {
-  {
-    "neovim-treesitter/nvim-treesitter",
-    name = "nvim-treesitter",
-    dependencies = {
-      "neovim-treesitter/treesitter-parser-registry",
-      "williamboman/mason.nvim",
-    },
-    lazy = false,
-    build = ":TSUpdate",
-    init = function()
-      vim.api.nvim_create_autocmd("FileType", {
-        group = vim.api.nvim_create_augroup("config_treesitter", { clear = true }),
-        pattern = {
-          "lua",
-          "c",
-          "cpp",
-          "python",
-          "nix",
-          "rust",
-          "bash",
-          "markdown",
-          "html",
-          "javascript",
-          "javascriptreact",
-          "css",
-          "vim",
-          "gitconfig",
-          "gitrebase",
-          "gitattributes",
-          "gitcommit",
-          "gitignore",
-        },
-        callback = function(event)
-          if pcall(vim.treesitter.start, event.buf) then
-            vim.bo[event.buf].indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
-          end
-        end,
-      })
-    end,
-    config = function()
-      local treesitter = require("nvim-treesitter")
-      treesitter.setup()
-
-      local function has_c_compiler()
-        return vim.fn.executable("cc") == 1
-          or vim.fn.executable("gcc") == 1
-          or vim.fn.executable("clang") == 1
-      end
-
-      local function install_missing_parsers(missing)
-        if not has_c_compiler() then
-          vim.notify_once(
-            "A C compiler is required to install or update Treesitter parsers",
-            vim.log.levels.WARN
-          )
-          return
-        end
-
-        treesitter.install(missing)
-      end
-
-      local function tree_sitter_cli_works()
-        if vim.fn.executable("tree-sitter") == 0 then
-          return false
-        end
-
-        local result = vim.system({ "tree-sitter", "--version" }, { text = true }):wait()
-        if result.code == 0 then
-          return true
-        end
-
-        vim.notify_once(
-          "tree-sitter CLI is installed but cannot run. On NixOS, enable nix-ld so Mason-installed binaries can execute.",
-          vim.log.levels.WARN
-        )
-        return false
-      end
-
-      local function ensure_treesitter_cli(callback)
-        if tree_sitter_cli_works() then
-          callback()
-          return
-        end
-
-        if #vim.api.nvim_list_uis() == 0 then
-          return
-        end
-
-        local mason_ok, mason = pcall(require, "mason")
-        local registry_ok, registry = pcall(require, "mason-registry")
-        if not mason_ok or not registry_ok then
-          vim.notify_once(
-            "tree-sitter CLI is required to install or update parsers; install tree-sitter-cli or enable mason.nvim",
-            vim.log.levels.WARN
-          )
-          return
-        end
-
-        mason.setup()
-        registry.refresh(function()
-          local package_ok, package = pcall(registry.get_package, "tree-sitter-cli")
-          if not package_ok then
-            vim.notify_once(
-              "Mason registry does not include tree-sitter-cli; install tree-sitter-cli before running :TSUpdate",
-              vim.log.levels.WARN
-            )
-            return
-          end
-
-          if package:is_installed() then
-            if tree_sitter_cli_works() then
-              callback()
-            end
-            return
-          end
-
-          if package:is_installing() then
-            vim.notify_once("tree-sitter-cli is already being installed by Mason", vim.log.levels.INFO)
-            return
-          end
-
-          vim.notify_once("Installing tree-sitter-cli with Mason for Treesitter parser updates", vim.log.levels.INFO)
-          package:install({}, function(success, error)
-            if success and tree_sitter_cli_works() then
-              callback()
-            else
-              vim.notify(
-                "Failed to install tree-sitter-cli with Mason: " .. tostring(error),
-                vim.log.levels.WARN
-              )
-            end
-          end)
-        end)
-      end
-
-      local installed = treesitter.get_installed("parsers")
-      local missing = vim.iter(treesitter_parsers)
-          :filter(function(parser)
-            return not vim.tbl_contains(installed, parser)
-          end)
-          :totable()
-
-      if #missing == 0 then
-        return
-      end
-
-      ensure_treesitter_cli(function()
-        if #missing > 0 then
-          install_missing_parsers(missing)
-        end
-      end)
-    end
-  },
-
   {
     "m4xshen/autoclose.nvim",
     config = function()

lua/plugins/render-markdown.lua

@@ -3,7 +3,6 @@ return {
     "MeanderingProgrammer/render-markdown.nvim",
     ft = { "markdown" },
     dependencies = {
-      "nvim-treesitter/nvim-treesitter",
       "nvim-tree/nvim-web-devicons",
     },
     opts = {