diff --git a/lua/custom/default.lua b/lua/custom/default.lua
index 5f61d76..c651e0e 100644
--- a/lua/custom/default.lua
+++ b/lua/custom/default.lua
@@ -177,3 +177,4 @@ pcode.active_java_config = {
   use_nvim_jdtls = true, -- mfussenegger/nvim-jdtls
 }
 pcode.active_deno_config = false
+pcode.active_kotlin_config = false
diff --git a/lua/plugins/kotlin.lua b/lua/plugins/kotlin.lua
new file mode 100644
index 0000000..f9e8a2f
--- /dev/null
+++ b/lua/plugins/kotlin.lua
@@ -0,0 +1,124 @@
+local M = {}
+if pcode.active_kotlin_config or false then
+  M = {
+    -- install treesitter
+    {
+      "nvim-treesitter/nvim-treesitter",
+      opts = function(_, opts)
+        opts.ensure_installed = opts.ensure_installed or {}
+        vim.list_extend(opts.ensure_installed, { "kotlin" })
+      end,
+    },
+    {
+      "williamboman/mason-lspconfig.nvim",
+      opts = function(_, opts)
+        opts.ensure_installed = opts.ensure_installed or {}
+        vim.list_extend(opts.ensure_installed, { "kotlin_language_server" })
+      end,
+    },
+    {
+      "stevearc/conform.nvim",
+      event = "VeryLazy",
+      opts = function(_, opts)
+        opts.formatters_by_ft = opts.formatters_by_ft or {}
+        local package = "ktfmt"
+        require("user.utils.masoncfg").try_install(package)
+        opts.formatters_by_ft.kotlin = { package }
+      end,
+    },
+    {
+      "mfussenegger/nvim-lint",
+      optional = true,
+      opts = function(_, opts)
+        opts.linters_by_ft = opts.linters_by_ft or {}
+        require("user.utils.masoncfg").try_install("ktlint")
+        opts.linters_by_ft.kotlin = { "ktlint" }
+      end,
+    },
+    {
+      "rcarriga/nvim-dap-ui",
+      lazy = true,
+      event = "BufRead",
+      dependencies = {
+        { "mfussenegger/nvim-dap", lazy = true },
+        { "nvim-neotest/nvim-nio", lazy = true },
+      },
+      opts = function()
+        require("user.utils.masoncfg").try_install("kotlin-debug-adapter")
+        require("user.dapui")
+        local dap = require("dap")
+        if not dap.adapters.kotlin then
+          dap.adapters.kotlin = {
+            type = "executable",
+            command = "kotlin-debug-adapter",
+            options = { auto_continue_if_many_stopped = false },
+          }
+        end
+
+        dap.configurations.kotlin = {
+          {
+            type = "kotlin",
+            request = "launch",
+            name = "This file",
+            -- may differ, when in doubt, whatever your project structure may be,
+            -- it has to correspond to the class file located at `build/classes/`
+            -- and of course you have to build before you debug
+            mainClass = function()
+              local root = vim.fs.find("src", { path = vim.uv.cwd(), upward = true, stop = vim.env.HOME })[1] or ""
+              local fname = vim.api.nvim_buf_get_name(0)
+              -- src/main/kotlin/websearch/Main.kt -> websearch.MainKt
+              return fname:gsub(root, ""):gsub("main/kotlin/", ""):gsub(".kt", "Kt"):gsub("/", "."):sub(2, -1)
+            end,
+            projectRoot = "${workspaceFolder}",
+            jsonLogFile = "",
+            enableJsonLogging = false,
+          },
+          {
+            -- Use this for unit tests
+            -- First, run
+            -- ./gradlew --info cleanTest test --debug-jvm
+            -- then attach the debugger to it
+            type = "kotlin",
+            request = "attach",
+            name = "Attach to debugging session",
+            port = 5005,
+            args = {},
+            projectRoot = vim.fn.getcwd,
+            hostName = "localhost",
+            timeout = 2000,
+          },
+        }
+      end,
+      keys = {
+        { "<leader>d", "", desc = "  Debug" },
+        { "<leader>dt", "<cmd>lua require'dap'.toggle_breakpoint()<cr>", desc = "Toggle Breakpoint" },
+        { "<leader>db", "<cmd>lua require'dap'.step_back()<cr>", desc = "Step Back" },
+        { "<leader>dc", "<cmd>lua require'dap'.continue()<cr>", desc = "Continue" },
+        { "<leader>dC", "<cmd>lua require'dap'.run_to_cursor()<cr>", desc = "Run To Cursor" },
+        { "<leader>dd", "<cmd>lua require'dap'.disconnect()<cr>", desc = "Disconnect" },
+        { "<leader>dg", "<cmd>lua require'dap'.session()<cr>", desc = "Get Session" },
+        { "<leader>di", "<cmd>lua require'dap'.step_into()<cr>", desc = "Step Into" },
+        { "<leader>do", "<cmd>lua require'dap'.step_over()<cr>", desc = "Step Over" },
+        { "<leader>du", "<cmd>lua require'dap'.step_out()<cr>", desc = "Step Out" },
+        { "<leader>dp", "<cmd>lua require'dap'.pause()<cr>", desc = "Pause" },
+        { "<leader>dr", "<cmd>lua require'dap'.repl.toggle()<cr>", desc = "Toggle Repl" },
+        { "<leader>ds", "<cmd>lua require'dap'.continue()<cr>", desc = "Start" },
+        { "<leader>dq", "<cmd>lua require'dap'.close()<cr>", desc = "Quit" },
+        { "<leader>dU", "<cmd>lua require'dapui'.toggle({reset = true})<cr>", desc = "Toggle UI" },
+        -- setting cek 
+        -- https://stackoverflow.com/questions/9356543/logging-while-testing-through-gradle
+        { "<leader>T", "", desc = " Test" },
+        { "<leader>Ta", "<cmd>terminal ./gradlew test<cr>", desc = "Run All" },
+        {
+          "<leader>Tu",
+          function()
+            local current_word = vim.fn.expand("<cword>")
+            vim.cmd("terminal ./gradlew test --tests *." .. current_word)
+          end,
+          desc = "Run Under Cursor",
+        },
+      },
+    },
+  }
+end
+return M