diff --git a/lua/gopher/_utils/commands.lua b/lua/gopher/_utils/commands.lua
index 33926a4..447a3af 100644
--- a/lua/gopher/_utils/commands.lua
+++ b/lua/gopher/_utils/commands.lua
@@ -1,14 +1,14 @@
+local Job = require "plenary.job"
+local c = require("gopher.config").commands
+local u = require "gopher._utils"
+
 ---Run any go commands like `go generate`, `go get`, `go mod`
 ---@param cmd string
 ---@param ... string|string[]
 return function(cmd, ...)
-  local Job = require "plenary.job"
-  local c = require("gopher.config").config.commands
-  local u = require "gopher._utils"
-
   local args = { ... }
   if #args == 0 then
-    u.notify("please provice any arguments", "error")
+    u.deferred_notify("please provice any arguments", vim.log.levels.ERROR)
     return
   end
 
@@ -29,12 +29,15 @@ return function(cmd, ...)
     args = cmd_args,
     on_exit = function(_, retval)
       if retval ~= 0 then
-        u.notify("command 'go " .. unpack(cmd_args) .. "' exited with code " .. retval, "error")
-        u.notify(cmd .. " " .. unpack(cmd_args), "debug")
+        u.deferred_notify(
+          "command 'go " .. unpack(cmd_args) .. "' exited with code " .. retval,
+          vim.log.levels.ERROR
+        )
+        u.deferred_notify(cmd .. " " .. unpack(cmd_args), vim.log.levels.DEBUG)
         return
       end
 
-      u.notify("go " .. cmd .. " was success runned", "info")
+      u.deferred_notify("go " .. cmd .. " was success runned", vim.log.levels.INFO)
     end,
   }):start()
 end
diff --git a/lua/gopher/_utils/health.lua b/lua/gopher/_utils/health.lua
index 5b12026..b651fe4 100644
--- a/lua/gopher/_utils/health.lua
+++ b/lua/gopher/_utils/health.lua
@@ -1,17 +1,26 @@
-return {
-  ---@param lib string
-  ---@return boolean
-  lualib_is_found = function(lib)
-    local is_found, _ = pcall(require, lib)
-    return is_found
-  end,
+local h = vim.health or require "health"
+local health = {}
 
-  ---@param bin string
-  ---@return boolean
-  binary_is_found = function(bin)
-    if vim.fn.executable(bin) == 1 then
-      return true
-    end
-    return false
-  end,
-}
+health.start = h.start or h.report_start
+health.ok = h.ok or h.report_ok
+health.warn = h.warn or h.report_warn
+health.error = h.error or h.report_error
+health.info = h.info or h.report_info
+
+---@param module string
+---@return boolean
+function health.is_lualib_found(module)
+  local is_found, _ = pcall(require, module)
+  return is_found
+end
+
+---@param bin string
+---@return boolean
+function health.is_binary_found(bin)
+  if vim.fn.executable(bin) == 1 then
+    return true
+  end
+  return false
+end
+
+return health
diff --git a/lua/gopher/_utils/init.lua b/lua/gopher/_utils/init.lua
index 190574f..a083a78 100644
--- a/lua/gopher/_utils/init.lua
+++ b/lua/gopher/_utils/init.lua
@@ -1,48 +1,39 @@
----@diagnostic disable: param-type-mismatch
-return {
-  ---@param t table
-  ---@return boolean
-  empty = function(t)
-    if t == nil then
-      return true
-    end
+local utils = {}
 
-    return next(t) == nil
-  end,
+---@param t table
+---@return boolean
+function utils.is_tbl_empty(t)
+  if t == nil then
+    return true
+  end
+  return next(t) == nil
+end
 
-  ---@param s string
-  ---@return string
-  rtrim = function(s)
-    local n = #s
-    while n > 0 and s:find("^%s", n) do
-      n = n - 1
-    end
+---@param s string
+---@return string
+function utils.rtrim(s)
+  local n = #s
+  while n > 0 and s:find("^%s", n) do
+    n = n - 1
+  end
 
-    return s:sub(1, n)
-  end,
+  return s:sub(1, n)
+end
 
-  ---@param msg string
-  ---@param lvl string|integer
-  notify = function(msg, lvl)
-    local l
-    if lvl == "error" or lvl == 4 then
-      l = vim.log.levels.ERROR
-    elseif lvl == "info" or lvl == 2 then
-      l = vim.log.levels.INFO
-    elseif lvl == "debug" or lvl == 1 then
-      l = vim.log.levels.DEBUG
-    end
+---@param msg string
+---@param lvl any
+function utils.deferred_notify(msg, lvl)
+  vim.defer_fn(function()
+    vim.notify(msg, lvl)
+  end, 0)
+end
 
-    vim.defer_fn(function()
-      vim.notify(msg, l)
-    end, 0)
-  end,
+-- safe require
+---@param  module string module name
+function utils.sreq(module)
+  local ok, m = pcall(require, module)
+  assert(ok, string.format("gopher.nvim dependency error: %s not installed", module))
+  return m
+end
 
-  ---safe require
-  ---@param name string module name
-  sreq = function(name)
-    local ok, m = pcall(require, name)
-    assert(ok, string.format("gopher.nvim dependency error: %s not installed", name))
-    return m
-  end,
-}
+return utils
diff --git a/lua/gopher/_utils/ts/init.lua b/lua/gopher/_utils/ts/init.lua
index ee24f49..aba3a94 100644
--- a/lua/gopher/_utils/ts/init.lua
+++ b/lua/gopher/_utils/ts/init.lua
@@ -1,7 +1,7 @@
 ---@diagnostic disable: param-type-mismatch
 local nodes = require "gopher._utils.ts.nodes"
 local u = require "gopher._utils"
-local M = {
+local ts = {
   querys = {
     struct_block = [[((type_declaration (type_spec name:(type_identifier) @struct.name type: (struct_type)))@struct.declaration)]],
     em_struct_block = [[(field_declaration name:(field_identifier)@struct.name type: (struct_type)) @struct.declaration]],
@@ -27,14 +27,14 @@ end
 ---@param bufnr string|nil
 ---@param do_notify boolean|nil
 ---@return table|nil
-function M.get_struct_node_at_pos(row, col, bufnr, do_notify)
+function ts.get_struct_node_at_pos(row, col, bufnr, do_notify)
   local notify = do_notify or true
-  local query = M.querys.struct_block .. " " .. M.querys.em_struct_block
+  local query = ts.querys.struct_block .. " " .. ts.querys.em_struct_block
   local bufn = bufnr or vim.api.nvim_get_current_buf()
   local ns = nodes.nodes_at_cursor(query, get_name_defaults(), bufn, row, col)
   if ns == nil then
     if notify then
-      u.notify("struct not found", "warn")
+      u.deferred_notify("struct not found", vim.log.levels.WARN)
     end
   else
     return ns[#ns]
@@ -46,14 +46,14 @@ end
 ---@param bufnr string|nil
 ---@param do_notify boolean|nil
 ---@return table|nil
-function M.get_func_method_node_at_pos(row, col, bufnr, do_notify)
+function ts.get_func_method_node_at_pos(row, col, bufnr, do_notify)
   local notify = do_notify or true
-  local query = M.querys.func .. " " .. M.querys.method_name
+  local query = ts.querys.func .. " " .. ts.querys.method_name
   local bufn = bufnr or vim.api.nvim_get_current_buf()
   local ns = nodes.nodes_at_cursor(query, get_name_defaults(), bufn, row, col)
   if ns == nil then
     if notify then
-      u.notify("function not found", "warn")
+      u.deferred_notify("function not found", vim.log.levels.WARN)
     end
   else
     return ns[#ns]
@@ -65,16 +65,16 @@ end
 ---@param bufnr string|nil
 ---@param do_notify boolean|nil
 ---@return table|nil
-function M.get_package_node_at_pos(row, col, bufnr, do_notify)
+function ts.get_package_node_at_pos(row, col, bufnr, do_notify)
   local notify = do_notify or true
   -- stylua: ignore
   if row > 10 then return end
-  local query = M.querys.package
+  local query = ts.querys.package
   local bufn = bufnr or vim.api.nvim_get_current_buf()
   local ns = nodes.nodes_at_cursor(query, get_name_defaults(), bufn, row, col)
   if ns == nil then
     if notify then
-      u.notify("package not found", "warn")
+      u.deferred_notify("package not found", vim.log.levels.WARN)
       return nil
     end
   else
@@ -87,18 +87,18 @@ end
 ---@param bufnr string|nil
 ---@param do_notify boolean|nil
 ---@return table|nil
-function M.get_interface_node_at_pos(row, col, bufnr, do_notify)
+function ts.get_interface_node_at_pos(row, col, bufnr, do_notify)
   local notify = do_notify or true
-  local query = M.querys.interface
+  local query = ts.querys.interface
   local bufn = bufnr or vim.api.nvim_get_current_buf()
   local ns = nodes.nodes_at_cursor(query, get_name_defaults(), bufn, row, col)
   if ns == nil then
     if notify then
-      u.notify("interface not found", "warn")
+      u.deferred_notify("interface not found", vim.log.levels.WARN)
     end
   else
     return ns[#ns]
   end
 end
 
-return M
+return ts
diff --git a/lua/gopher/_utils/ts/nodes.lua b/lua/gopher/_utils/ts/nodes.lua
index 87286a2..e9c730d 100644
--- a/lua/gopher/_utils/ts/nodes.lua
+++ b/lua/gopher/_utils/ts/nodes.lua
@@ -1,3 +1,7 @@
+local ts_query = require "nvim-treesitter.query"
+local parsers = require "nvim-treesitter.parsers"
+local locals = require "nvim-treesitter.locals"
+local u = require "gopher._utils"
 local M = {}
 
 local function intersects(row, col, sRow, sCol, eRow, eCol)
@@ -53,10 +57,6 @@ end
 ---@param pos_row string
 ---@return string
 function M.get_all_nodes(query, lang, _, bufnr, pos_row, _)
-  local ts_query = require "nvim-treesitter.query"
-  local parsers = require "nvim-treesitter.parsers"
-  local locals = require "nvim-treesitter.locals"
-
   bufnr = bufnr or 0
   pos_row = pos_row or 30000
 
@@ -113,8 +113,6 @@ end
 ---@param col string
 ---@return table
 function M.nodes_at_cursor(query, default, bufnr, row, col)
-  local u = require "gopher._utils"
-
   bufnr = bufnr or vim.api.nvim_get_current_buf()
   local ft = vim.api.nvim_buf_get_option(bufnr, "ft")
   if row == nil or col == nil then
@@ -123,13 +121,19 @@ function M.nodes_at_cursor(query, default, bufnr, row, col)
 
   local nodes = M.get_all_nodes(query, ft, default, bufnr, row, col)
   if nodes == nil then
-    u.notify("Unable to find any nodes. Place your cursor on a go symbol and try again", "debug")
+    u.deferred_notify(
+      "Unable to find any nodes. Place your cursor on a go symbol and try again",
+      vim.log.levels.DEBUG
+    )
     return nil
   end
 
   nodes = M.sort_nodes(M.intersect_nodes(nodes, row, col))
   if nodes == nil or #nodes == 0 then
-    u.notify("Unable to find any nodes at pos. " .. tostring(row) .. ":" .. tostring(col), "debug")
+    u.deferred_notify(
+      "Unable to find any nodes at pos. " .. tostring(row) .. ":" .. tostring(col),
+      vim.log.levels.DEBUG
+    )
     return nil
   end
 
diff --git a/lua/gopher/api.lua b/lua/gopher/api.lua
deleted file mode 100644
index 6e854af..0000000
--- a/lua/gopher/api.lua
+++ /dev/null
@@ -1,29 +0,0 @@
-local API = {}
-local tags = require "gopher.struct_tags"
-local tests = require "gopher.gotests"
-local cmd = require "gopher._utils.commands"
-
-API.install_deps = require "gopher.installer"
-API.tags_add = tags.add
-API.tags_rm = tags.remove
-API.impl = require "gopher.impl"
-API.iferr = require "gopher.iferr"
-API.comment = require "gopher.comment"
-API.test_add = tests.func_test
-API.test_exported = tests.all_exported_tests
-API.tests_all = tests.all_tests
-
-API.get = function(...)
-  cmd("get", ...)
-end
-API.mod = function(...)
-  cmd("mod", ...)
-end
-API.generate = function(...)
-  cmd("generate", ...)
-end
-API.work = function(...)
-  cmd("work", ...)
-end
-
-return API
diff --git a/lua/gopher/config.lua b/lua/gopher/config.lua
index a467f83..36b5773 100644
--- a/lua/gopher/config.lua
+++ b/lua/gopher/config.lua
@@ -1,33 +1,27 @@
----@class Config
----@field commands ConfigCommands
+---@class gopher.Config
+local config = {}
 
----@class ConfigCommands
----@field go string
----@field gomodifytags string
----@field gotests string
----@field impl string
----@field iferr string
----@field dlv string
-
-local M = {
-  ---@type Config
-  config = {
-    ---set custom commands for tools
-    commands = {
-      go = "go",
-      gomodifytags = "gomodifytags",
-      gotests = "gotests",
-      impl = "impl",
-      iferr = "iferr",
-      dlv = "dlv",
-    },
+---@class gopher.Config
+---@field commands gopher.ConfigCommands
+local default_config = {
+  ---@class gopher.ConfigCommands
+  commands = {
+    go = "go",
+    gomodifytags = "gomodifytags",
+    gotests = "gotests",
+    impl = "impl",
+    iferr = "iferr",
+    dlv = "dlv",
   },
 }
 
----Plugin setup function
----@param opts Config user config
-function M.setup(opts)
-  M.config = vim.tbl_deep_extend("force", M.config, opts or {})
+---@param user_config gopher.Config|nil
+function config.setup(user_config)
+  config = vim.tbl_deep_extend("force", {}, default_config, user_config or {})
 end
 
-return M
+-- setup ifself, needs for ability to get
+-- default config without calling .setup()
+config.setup()
+
+return config
diff --git a/lua/gopher/dap.lua b/lua/gopher/dap.lua
new file mode 100644
index 0000000..af16438
--- /dev/null
+++ b/lua/gopher/dap.lua
@@ -0,0 +1,116 @@
+local u = require "gopher._utils"
+local dap = {}
+
+dap.adapter = function(callback, config)
+  local host = config.host or "127.0.0.1"
+  local port = config.port or "38697"
+  local addr = string.format("%s:%s", host, port)
+
+  local handle, pid_or_err
+  local stdout = assert(vim.loop.new_pipe(false))
+  local opts = {
+    stdio = { nil, stdout },
+    args = { "dap", "-l", addr },
+    detached = true,
+  }
+
+  handle, pid_or_err = vim.loop.spawn("dlv", opts, function(status)
+    if not stdout or not handle then
+      return
+    end
+
+    stdout:close()
+    handle:close()
+    if status ~= 0 then
+      print("dlv exited with code", status)
+    end
+  end)
+
+  assert(handle, "Error running dlv: " .. tostring(pid_or_err))
+  if stdout then
+    stdout:read_start(function(err, chunk)
+      assert(not err, err)
+      if chunk then
+        vim.schedule(function()
+          require("dap.repl").append(chunk)
+        end)
+      end
+    end)
+  end
+
+  -- wait for delve to start
+  vim.defer_fn(function()
+    callback { type = "server", host = "127.0.0.1", port = port }
+  end, 100)
+end
+
+local function args_input()
+  vim.ui.input({ prompt = "Args: " }, function(input)
+    return vim.split(input or "", " ")
+  end)
+end
+
+local function get_arguments()
+  local co = coroutine.running()
+  if co then
+    return coroutine.create(function()
+      local args = args_input()
+      coroutine.resume(co, args)
+    end)
+  else
+    return args_input()
+  end
+end
+
+dap.configuration = {
+  {
+    type = "go",
+    name = "Debug",
+    request = "launch",
+    program = "${file}",
+  },
+  {
+    type = "go",
+    name = "Debug (Arguments)",
+    request = "launch",
+    program = "${file}",
+    args = get_arguments,
+  },
+  {
+    type = "go",
+    name = "Debug Package",
+    request = "launch",
+    program = "${fileDirname}",
+  },
+  {
+    type = "go",
+    name = "Attach",
+    mode = "local",
+    request = "attach",
+    processId = require("dap.utils").pick_process,
+  },
+  {
+    type = "go",
+    name = "Debug test",
+    request = "launch",
+    mode = "test",
+    program = "${file}",
+  },
+  {
+    type = "go",
+    name = "Debug test (go.mod)",
+    request = "launch",
+    mode = "test",
+    program = "./${relativeFileDirname}",
+  },
+}
+
+---setup `nvim-dap` for Go
+function dap.setup()
+  local d = u.sreq "dap"
+
+  d.adapters.go = dap.adapter
+  d.configurations.go = dap.configuration
+end
+
+return dap
diff --git a/lua/gopher/dap/config.lua b/lua/gopher/dap/config.lua
deleted file mode 100644
index 80b2196..0000000
--- a/lua/gopher/dap/config.lua
+++ /dev/null
@@ -1,98 +0,0 @@
----@diagnostic disable: param-type-mismatch
-local function get_arguments()
-  local function get()
-    vim.ui.input({ prompt = "Args: " }, function(input)
-      return vim.split(input or "", " ") ---@diagnostic disable-line: missing-parameter
-    end)
-  end
-
-  local co = coroutine.running()
-  if co then
-    return coroutine.create(function()
-      local args = get()
-      coroutine.resume(co, args)
-    end)
-  else
-    return get()
-  end
-end
-
-return {
-  adapter = function(callback, config)
-    local handle, pid_or_err
-    local stdout = vim.loop.new_pipe(false)
-    local host = config.host or "127.0.0.1"
-    local port = config.port or "38697"
-    local addr = string.format("%s:%s", host, port)
-    local opts = {
-      stdio = { nil, stdout },
-      args = { "dap", "-l", addr },
-      detached = true,
-    }
-
-    handle, pid_or_err = vim.loop.spawn("dlv", opts, function(code)
-      stdout:close()
-      handle:close()
-      if code ~= 0 then
-        print("dlv exited with code", code)
-      end
-    end)
-
-    assert(handle, "Error running dlv: " .. tostring(pid_or_err))
-    stdout:read_start(function(err, chunk)
-      assert(not err, err)
-      if chunk then
-        vim.schedule(function()
-          require("dap.repl").append(chunk)
-        end)
-      end
-    end)
-
-    -- Wait for delve to start
-    vim.defer_fn(function()
-      callback { type = "server", host = "127.0.0.1", port = port }
-    end, 100)
-  end,
-  configuration = {
-    {
-      type = "go",
-      name = "Debug",
-      request = "launch",
-      program = "${file}",
-    },
-    {
-      type = "go",
-      name = "Debug (Arguments)",
-      request = "launch",
-      program = "${file}",
-      args = get_arguments,
-    },
-    {
-      type = "go",
-      name = "Debug Package",
-      request = "launch",
-      program = "${fileDirname}",
-    },
-    {
-      type = "go",
-      name = "Attach",
-      mode = "local",
-      request = "attach",
-      processId = require("dap.utils").pick_process,
-    },
-    {
-      type = "go",
-      name = "Debug test",
-      request = "launch",
-      mode = "test",
-      program = "${file}",
-    },
-    {
-      type = "go",
-      name = "Debug test (go.mod)",
-      request = "launch",
-      mode = "test",
-      program = "./${relativeFileDirname}",
-    },
-  },
-}
diff --git a/lua/gopher/dap/init.lua b/lua/gopher/dap/init.lua
deleted file mode 100644
index 9b0b626..0000000
--- a/lua/gopher/dap/init.lua
+++ /dev/null
@@ -1,13 +0,0 @@
-local M = {}
-
----setup nvim-dap for golang using
-function M.setup()
-  local cfg = require "gopher.dap.config"
-  local u = require "gopher._utils"
-
-  local dap = u.sreq "dap"
-  dap.adapters.go = cfg.adapter
-  dap.configurations.go = cfg.configuration
-end
-
-return M
diff --git a/lua/gopher/gotests.lua b/lua/gopher/gotests.lua
index 724971c..cf9a0f1 100644
--- a/lua/gopher/gotests.lua
+++ b/lua/gopher/gotests.lua
@@ -1,21 +1,24 @@
+local c = require("gopher.config").commands
 local u = require "gopher._utils"
-local M = {}
+local ts_utils = require "gopher._utils.ts"
+local Job = require "plenary.job"
+local gotests = {}
 
 ---@param cmd_args table
 local function run(cmd_args)
-  local Job = require "plenary.job"
-  local c = require("gopher.config").config.commands
-
   Job:new({
     command = c.gotests,
     args = cmd_args,
     on_exit = function(_, retval)
       if retval ~= 0 then
-        u.notify("command 'go " .. unpack(cmd_args) .. "' exited with code " .. retval, "error")
+        u.deferred_notify(
+          "command '" .. c.gotests .. " " .. unpack(cmd_args) .. "' exited with code " .. retval,
+          vim.log.levels.ERROR
+        )
         return
       end
 
-      u.notify("unit test(s) generated", "info")
+      u.deferred_notify("unit test(s) generated", vim.log.levels.INFO)
     end,
   }):start()
 end
@@ -30,12 +33,10 @@ end
 
 ---generate unit test for one function
 ---@param parallel boolean
-function M.func_test(parallel)
-  local ts_utils = require "gopher._utils.ts"
-
+function gotests.func_test(parallel)
   local ns = ts_utils.get_func_method_node_at_pos(unpack(vim.api.nvim_win_get_cursor(0)))
   if ns == nil or ns.name == nil then
-    u.notify("cursor on func/method and execute the command again", "info")
+    u.deferred_notify("cursor on func/method and execute the command again", vim.log.levels.INFO)
     return
   end
 
@@ -49,7 +50,7 @@ end
 
 ---generate unit tests for all functions in current file
 ---@param parallel boolean
-function M.all_tests(parallel)
+function gotests.all_tests(parallel)
   local cmd_args = { "-all" }
   if parallel then
     table.insert(cmd_args, "-parallel")
@@ -60,7 +61,7 @@ end
 
 ---generate unit tests for all exported functions
 ---@param parallel boolean
-function M.all_exported_tests(parallel)
+function gotests.all_exported_tests(parallel)
   local cmd_args = {}
   if parallel then
     table.insert(cmd_args, "-parallel")
@@ -70,4 +71,4 @@ function M.all_exported_tests(parallel)
   add_test(cmd_args)
 end
 
-return M
+return gotests
diff --git a/lua/gopher/health.lua b/lua/gopher/health.lua
index 935fbac..4b3f3a2 100644
--- a/lua/gopher/health.lua
+++ b/lua/gopher/health.lua
@@ -1,16 +1,7 @@
 local health = {}
-local cmd = require("gopher.config").config.commands
+local cmd = require("gopher.config").commands
 local u = require "gopher._utils.health"
 
-local _h = vim.health or require "health"
-local h = {
-  start = _h.start or _h.report_start,
-  ok = _h.ok or _h.report_ok,
-  warn = _h.warn or _h.report_warn,
-  error = _h.error or _h.report_error,
-  info = _h.info or _h.report_info,
-}
-
 local deps = {
   plugin = {
     { lib = "dap", msg = "required for `gopher.dap`", optional = true },
@@ -36,29 +27,29 @@ local deps = {
 }
 
 function health.check()
-  h.start "required plugins"
+  u.start "required plugins"
   for _, plugin in ipairs(deps.plugin) do
-    if u.lualib_is_found(plugin.lib) then
-      h.ok(plugin.lib .. " installed")
+    if u.is_lualib_found(plugin.lib) then
+      u.ok(plugin.lib .. " installed")
     else
       if plugin.optional then
-        h.warn(plugin.lib .. " not found, " .. plugin.msg)
+        u.warn(plugin.lib .. " not found, " .. plugin.msg)
       else
-        h.error(plugin.lib .. " not found, " .. plugin.msg)
+        u.error(plugin.lib .. " not found, " .. plugin.msg)
       end
     end
   end
 
-  h.start "required binaries"
-  h.info "all those binaries can be installed by `:GoInstallDeps`"
+  u.start "required binaries"
+  u.info "all those binaries can be installed by `:GoInstallDeps`"
   for _, bin in ipairs(deps.bin) do
-    if u.binary_is_found(bin.bin) then
-      h.ok(bin.bin .. " installed")
+    if u.is_lualib_found(bin.bin) then
+      u.ok(bin.bin .. " installed")
     else
       if bin.optional then
-        h.warn(bin.bin .. " not found, " .. bin.msg)
+        u.warn(bin.bin .. " not found, " .. bin.msg)
       else
-        h.error(bin.bin .. " not found, " .. bin.msg)
+        u.error(bin.bin .. " not found, " .. bin.msg)
       end
     end
   end
diff --git a/lua/gopher/iferr.lua b/lua/gopher/iferr.lua
index 7f43318..fbeddf7 100644
--- a/lua/gopher/iferr.lua
+++ b/lua/gopher/iferr.lua
@@ -1,16 +1,18 @@
----Add iferr declaration
----That's Lua of vimscript implementation of:
----github.com/koron/iferr
-return function()
-  local c = require("gopher.config").config.commands
-  local u = require "gopher._utils"
+local c = require("gopher.config").commands
+local u = require "gopher._utils"
+local iferr = {}
 
+-- That's Lua of vimscript implementation of: github.com/koron/iferr
+iferr.iferr = function()
   local boff = vim.fn.wordcount().cursor_bytes
   local cmd = (c.iferr .. " -pos " .. boff)
   local data = vim.fn.systemlist(cmd, vim.fn.bufnr "%")
 
   if vim.v.shell_error ~= 0 then
-    u.notify("command " .. cmd .. " exited with code " .. vim.v.shell_error, "error")
+    u.deferred_notify(
+      "command " .. cmd .. " exited with code " .. vim.v.shell_error,
+      vim.log.levels.ERROR
+    )
     return
   end
 
@@ -19,3 +21,5 @@ return function()
   vim.cmd [[silent normal! j=2j]]
   vim.fn.setpos(".", pos)
 end
+
+return iferr
diff --git a/lua/gopher/impl.lua b/lua/gopher/impl.lua
index a279889..6eddc0f 100644
--- a/lua/gopher/impl.lua
+++ b/lua/gopher/impl.lua
@@ -1,12 +1,14 @@
+local c = require("gopher.config").commands
+local Job = require "plenary.job"
+local ts_utils = require "gopher._utils.ts"
 local u = require "gopher._utils"
+local impl = {}
 
 ---@return string
 local function get_struct()
-  local ts_utils = require "gopher._utils.ts"
-
   local ns = ts_utils.get_struct_node_at_pos(unpack(vim.api.nvim_win_get_cursor(0)))
   if ns == nil then
-    u.notify("put cursor on a struct or specify a receiver", "info")
+    u.deferred_notify("put cursor on a struct or specify a receiver", vim.log.levels.INFO)
     return ""
   end
 
@@ -18,10 +20,7 @@ local function get_struct()
   return ns.name
 end
 
-return function(...)
-  local c = require("gopher.config").config.commands
-  local Job = require "plenary.job"
-
+function impl.impl(...)
   local args = { ... }
   local iface, recv_name = "", ""
   local recv = get_struct()
@@ -30,7 +29,7 @@ return function(...)
     iface = vim.fn.input "impl: generating method stubs for interface: "
     vim.cmd "redraw!"
     if iface == "" then
-      u.notify("usage: GoImpl f *File io.Reader", "info")
+      u.deferred_notify("usage: GoImpl f *File io.Reader", vim.log.levels.INFO)
       return
     end
   elseif #args == 1 then -- :GoImpl io.Reader
@@ -61,7 +60,10 @@ return function(...)
     args = cmd_args,
     on_exit = function(data, retval)
       if retval ~= 0 then
-        u.notify("command 'impl " .. unpack(cmd_args) .. "' exited with code " .. retval, "error")
+        u.deferred_notify(
+          "command '" .. c.impl .. " " .. unpack(cmd_args) .. "' exited with code " .. retval,
+          vim.log.levels.ERROR
+        )
         return
       end
 
@@ -73,3 +75,5 @@ return function(...)
   table.insert(res_data, 1, "")
   vim.fn.append(pos, res_data)
 end
+
+return impl
diff --git a/lua/gopher/init.lua b/lua/gopher/init.lua
index 46b649e..2f6f32e 100644
--- a/lua/gopher/init.lua
+++ b/lua/gopher/init.lua
@@ -1,5 +1,35 @@
-local GOPHER = {}
+local tags = require "gopher.struct_tags"
+local tests = require "gopher.gotests"
+local uc = require "gopher._utils.commands"
+local gopher = {}
 
-GOPHER.setup = require("gopher.config").setup
+gopher.setup = require("gopher.config").setup
+gopher.install_deps = require("gopher.installer").install_deps
+gopher.impl = require("gopher.impl").impl
+gopher.iferr = require("gopher.iferr").iferr
+gopher.comment = require "gopher.comment"
 
-return GOPHER
+gopher.tags_add = tags.add
+gopher.tags_rm = tags.remove
+
+gopher.test_add = tests.func_test
+gopher.test_exported = tests.all_exported_tests
+gopher.tests_all = tests.all_tests
+
+gopher.get = function(...)
+  uc("get", ...)
+end
+
+gopher.mod = function(...)
+  uc("mod", ...)
+end
+
+gopher.generate = function(...)
+  uc("generate", ...)
+end
+
+gopher.work = function(...)
+  uc("work", ...)
+end
+
+return gopher
diff --git a/lua/gopher/installer.lua b/lua/gopher/installer.lua
index fdd6242..939d50f 100644
--- a/lua/gopher/installer.lua
+++ b/lua/gopher/installer.lua
@@ -1,3 +1,8 @@
+local Job = require "plenary.job"
+local c = require("gopher.config").commands
+local u = require "gopher._utils"
+local installer = {}
+
 local urls = {
   gomodifytags = "github.com/fatih/gomodifytags",
   impl = "github.com/josharian/impl",
@@ -8,28 +13,30 @@ local urls = {
 
 ---@param pkg string
 local function install(pkg)
-  local Job = require "plenary.job"
-  local u = require "gopher._utils"
-
   local url = urls[pkg] .. "@latest"
 
   Job:new({
-    command = "go",
+    command = c.go,
     args = { "install", url },
     on_exit = function(_, retval)
       if retval ~= 0 then
-        u.notify("command 'go install " .. url .. "' exited with code " .. retval, "error")
+        u.deferred_notify(
+          "command 'go install " .. url .. "' exited with code " .. retval,
+          vim.log.levels.ERROR
+        )
         return
       end
 
-      u.notify("install " .. url .. " finished", "info ")
+      u.deferred_notify("install " .. url .. " finished", vim.log.levels.INFO)
     end,
   }):start()
 end
 
 ---Install required go deps
-return function()
+function installer.install_deps()
   for pkg, _ in pairs(urls) do
     install(pkg)
   end
 end
+
+return installer
diff --git a/lua/gopher/struct_tags.lua b/lua/gopher/struct_tags.lua
index a91901a..690eae1 100644
--- a/lua/gopher/struct_tags.lua
+++ b/lua/gopher/struct_tags.lua
@@ -1,11 +1,10 @@
-local M = {}
+local ts_utils = require "gopher._utils.ts"
+local Job = require "plenary.job"
+local c = require("gopher.config").commands
+local u = require "gopher._utils"
+local struct_tags = {}
 
 local function modify(...)
-  local ts_utils = require "gopher._utils.ts"
-  local Job = require "plenary.job"
-  local c = require("gopher.config").config.commands
-  local u = require "gopher._utils"
-
   local fpath = vim.fn.expand "%" ---@diagnostic disable-line: missing-parameter
   local ns = ts_utils.get_struct_node_at_pos(unpack(vim.api.nvim_win_get_cursor(0)))
   if ns == nil then
@@ -47,9 +46,14 @@ local function modify(...)
     args = cmd_args,
     on_exit = function(data, retval)
       if retval ~= 0 then
-        u.notify(
-          "command 'gomodifytags " .. unpack(cmd_args) .. "' exited with code " .. retval,
-          "error"
+        u.deferred_notify(
+          "command '"
+            .. c.gomodifytags
+            .. " "
+            .. unpack(cmd_args)
+            .. "' exited with code "
+            .. retval,
+          vim.log.levels.ERROR
         )
         return
       end
@@ -66,7 +70,7 @@ local function modify(...)
     or tagged["start"] == nil
     or tagged["start"] == 0
   then
-    u.notify("failed to set tags " .. vim.inspect(tagged), "error")
+    u.deferred_notify("failed to set tags " .. vim.inspect(tagged), vim.log.levels.ERROR)
   end
 
   for i, v in ipairs(tagged.lines) do
@@ -86,7 +90,7 @@ end
 
 ---add tags to struct under cursor
 ---@param ... unknown
-function M.add(...)
+function struct_tags.add(...)
   local arg = { ... }
   if #arg == nil or arg == "" then
     arg = { "json" }
@@ -102,7 +106,7 @@ end
 
 ---remove tags to struct under cursor
 ---@param ... unknown
-function M.remove(...)
+function struct_tags.remove(...)
   local arg = { ... }
   if #arg == nil or arg == "" then
     arg = { "json" }
@@ -116,4 +120,4 @@ function M.remove(...)
   modify(unpack(cmd_args))
 end
 
-return M
+return struct_tags
diff --git a/plugin/gopher.vim b/plugin/gopher.vim
index e797966..bdffbbe 100644
--- a/plugin/gopher.vim
+++ b/plugin/gopher.vim
@@ -1,13 +1,13 @@
-command! -nargs=* GoTagAdd :lua require"gopher.api".tags_add(<f-args>)
-command! -nargs=* GoTagRm :lua require"gopher.api".tags_rm(<f-args>)
-command! -nargs=* GoTestAdd :lua require"gopher.api".test_add(<f-args>)
-command! -nargs=* GoTestsAll :lua require"gopher.api".tests_all(<f-args>)
-command! -nargs=* GoTestsExp :lua require"gopher.api".test_exported(<f-args>)
-command! -nargs=* GoMod :lua require"gopher.api".mod(<f-args>)
-command! -nargs=* GoGet :lua require"gopher.api".get(<f-args>)
-command! -nargs=* GoWork :lua require"gopher.api".work(<f-args>)
-command! -nargs=* GoImpl :lua require"gopher.api".impl(<f-args>)
-command! -nargs=* GoGenerate :lua require"gopher.api".generate(<f-args>)
-command! GoCmt :lua require"gopher.api".comment()
-command! GoIfErr :lua require"gopher.api".iferr()
-command! GoInstallDeps :lua require"gopher.api".install_deps()
+command! -nargs=* GoTagAdd :lua require"gopher".tags_add(<f-args>)
+command! -nargs=* GoTagRm :lua require"gopher".tags_rm(<f-args>)
+command! -nargs=* GoTestAdd :lua require"gopher".test_add(<f-args>)
+command! -nargs=* GoTestsAll :lua require"gopher".tests_all(<f-args>)
+command! -nargs=* GoTestsExp :lua require"gopher".test_exported(<f-args>)
+command! -nargs=* GoMod :lua require"gopher".mod(<f-args>)
+command! -nargs=* GoGet :lua require"gopher".get(<f-args>)
+command! -nargs=* GoWork :lua require"gopher".work(<f-args>)
+command! -nargs=* GoImpl :lua require"gopher".impl(<f-args>)
+command! -nargs=* GoGenerate :lua require"gopher".generate(<f-args>)
+command! GoCmt :lua require"gopher".comment()
+command! GoIfErr :lua require"gopher".iferr()
+command! GoInstallDeps :lua require"gopher".install_deps()