diff --git a/.github/workflows/linters.yml b/.github/workflows/linters.yml
index 0122b93..3f5fb99 100644
--- a/.github/workflows/linters.yml
+++ b/.github/workflows/linters.yml
@@ -24,6 +24,35 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           args: .
 
+  llscheck:
+    name: llscheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          version: 3.x
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install NeoVim
+        uses: rhysd/action-setup-vim@v1
+        with:
+          neovim: true
+          version: stable
+
+      - uses: leafo/gh-actions-lua@v12
+      - uses: leafo/gh-actions-luarocks@v4
+
+      - name: Install llscheck
+        run: |
+          luarocks install lua-language-server
+          luarocks install llscheck
+
+      - name: llscheck
+        run: task llscheck
+
   docs:
     name: Docs
     runs-on: ubuntu-latest
diff --git a/.github/workflows/luarc.json b/.github/workflows/luarc.json
new file mode 100644
index 0000000..dd74038
--- /dev/null
+++ b/.github/workflows/luarc.json
@@ -0,0 +1,13 @@
+{
+    "diagnostics.libraryFiles": "Disable",
+    "runtime.version": "LuaJIT",
+    "workspace.checkThirdParty": "Disable",
+    "workspace.library": [
+        "$VIMRUNTIME/lua",
+        "lua",
+        ".tests/site/pack/deps/start/mini.doc/lua",
+        ".tests/site/pack/deps/start/mini.test/lua",
+        ".tests/site/pack/deps/start/nvim-treesitter/lua",
+        ".tests/site/pack/deps/start/tokyonight.nvim/lua"
+    ]
+}
diff --git a/Taskfile.yml b/Taskfile.yml
index 2905634..f05a195 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -21,8 +21,13 @@ tasks:
              -u ./scripts/minimal_init.lua \
              -c "lua MiniTest.run()" \
              -c ":qa!"
-  nvim:
-    cmd: nvim --clean -u "./scripts/minimal_init.lua" {{ .CLI_ARGS }}
+
+  llscheck:
+    desc: run type checking
+    cmd: |
+        VIMRUNTIME="`nvim --clean --headless +'lua io.write(vim.env.VIMRUNTIME)' +q`" \
+          llscheck --configpath=.github/workflows/luarc.json\
+                   --checklevel Error
 
   docgen:
     desc: generate vimhelp