diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8564381..c82730b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -47,7 +47,12 @@ jobs:
           key: ${{ runner.os }}-tests-${{ hashFiles('${{ github.workspace }}/.tests') }}
 
       - name: Install Go bins
-        run: nvim --headless -u "./scripts/minimal_init.lua" -c "GoInstallDeps" -c "qa!"
+        run: |
+          # TODO: install with :GoInstallDeps
+          go install github.com/fatih/gomodifytags@latest
+          go install github.com/josharian/impl@latest
+          go install github.com/cweill/gotests/...@latest
+          go install github.com/koron/iferr@latest
 
       - name: Run Tests
         run: |
diff --git a/README.md b/README.md
index 49cb8ed..a6f59db 100644
--- a/README.md
+++ b/README.md
@@ -13,17 +13,15 @@ It's **NOT** an LSP tool, the main goal of this plugin is to add go tooling supp
 Requirements:
 
 - **Neovim 0.10** or later
-- `go` treesitter parser, install by `:TSInstall go`
+- Treesitter `go` parser(`:TSInstall go`)
 - [Go](https://github.com/golang/go) installed (tested on 1.23)
 
 ```lua
 {
   "olexsmir/gopher.nvim",
   ft = "go",
-  -- branch = "develop", -- if you want develop branch
-                         -- keep in mind, it might break everything
+  -- branch = "develop"
   dependencies = {
-    "nvim-lua/plenary.nvim",
     "nvim-treesitter/nvim-treesitter",
   },
   -- (optional) will update plugin's deps on every update
diff --git a/lua/gopher/_utils/init.lua b/lua/gopher/_utils/init.lua
index 96a9134..1ff0f28 100644
--- a/lua/gopher/_utils/init.lua
+++ b/lua/gopher/_utils/init.lua
@@ -3,8 +3,9 @@ local log = require "gopher._utils.log"
 local utils = {}
 
 ---@param msg string
----@param lvl number
+---@param lvl? number
 function utils.deferred_notify(msg, lvl)
+  lvl = lvl or vim.log.levels.INFO
   vim.defer_fn(function()
     vim.notify(msg, lvl, {
       title = c.___plugin_name,
@@ -23,4 +24,22 @@ function utils.notify(msg, lvl)
   log.debug(msg)
 end
 
+---@param path string
+---@return string
+function utils.readfile_joined(path)
+  return table.concat(vim.fn.readfile(path), "\n")
+end
+
+---@param t string[]
+---@return string[]
+function utils.remove_empty_lines(t)
+  local res = {}
+  for _, line in ipairs(t) do
+    if line ~= "" then
+      table.insert(res, line)
+    end
+  end
+  return res
+end
+
 return utils
diff --git a/lua/gopher/_utils/runner/init.lua b/lua/gopher/_utils/runner/init.lua
index 3c08f7f..15eaa42 100644
--- a/lua/gopher/_utils/runner/init.lua
+++ b/lua/gopher/_utils/runner/init.lua
@@ -1,33 +1,39 @@
-local Job = require "plenary.job"
+local c = require "gopher.config"
 local runner = {}
 
 ---@class gopher.RunnerOpts
----@field args? string[]
----@field cwd? string?
----@field on_exit? fun(data:string, status:number)
+---@field cwd? string
+---@field timeout? number
+---@field stdin? boolean|string|string[]
+---@field text? boolean
 
----@param cmd string
----@param opts gopher.RunnerOpts
----@return string[]|nil
+---@param cmd (string|number)[]
+---@param on_exit fun(out:vim.SystemCompleted)
+---@param opts? gopher.RunnerOpts
+---@return vim.SystemObj
+function runner.async(cmd, on_exit, opts)
+  opts = opts or {}
+  return vim.system(cmd, {
+    cwd = opts.cwd or nil,
+    timeout = opts.timeout or c.timeout,
+    stdin = opts.stdin or nil,
+    text = opts.text or true,
+  }, on_exit)
+end
+
+---@param cmd (string|number)[]
+---@param opts? gopher.RunnerOpts
+---@return vim.SystemCompleted
 function runner.sync(cmd, opts)
-  local output
-  Job:new({
-    command = cmd,
-    args = opts.args,
-    cwd = opts.cwd,
-    on_stderr = function(_, data)
-      vim.print(data)
-    end,
-    on_exit = function(data, status)
-      output = data:result()
-      vim.schedule(function()
-        if opts.on_exit then
-          opts.on_exit(output, status)
-        end
-      end)
-    end,
-  }):sync(60000 --[[1 min]])
-  return output
+  opts = opts or {}
+  return vim
+    .system(cmd, {
+      cwd = opts.cwd or nil,
+      timeout = opts.timeout or c.timeout,
+      stdin = opts.stdin or nil,
+      text = opts.text or true,
+    })
+    :wait()
 end
 
 return runner
diff --git a/lua/gopher/config.lua b/lua/gopher/config.lua
index 18c08c3..94dbab9 100644
--- a/lua/gopher/config.lua
+++ b/lua/gopher/config.lua
@@ -33,6 +33,10 @@ local default_config = {
   ---@type number
   log_level = vim.log.levels.INFO,
 
+  -- timeout for running commands
+  ---@type number
+  timeout = 2000,
+
   -- user specified paths to binaries
   ---@class gopher.ConfigCommand
   commands = {
diff --git a/lua/gopher/gotests.lua b/lua/gopher/gotests.lua
index 1c177b6..e97f26c 100644
--- a/lua/gopher/gotests.lua
+++ b/lua/gopher/gotests.lua
@@ -67,16 +67,12 @@ local function add_test(args)
 
   log.debug("generating tests with args: ", args)
 
-  return r.sync(c.commands.gotests, {
-    args = args,
-    on_exit = function(data, status)
-      if not status == 0 then
-        error("gotests failed: " .. data)
-      end
+  local rs = r.sync { c.commands.gotests, unpack(args) }
+  if rs.code ~= 0 then
+    error("gotests failed: " .. rs.stderr)
+  end
 
-      u.notify "unit test(s) generated"
-    end,
-  })
+  u.notify "unit test(s) generated"
 end
 
 -- generate unit test for one function
diff --git a/lua/gopher/health.lua b/lua/gopher/health.lua
index 9fa0bed..4438c8a 100644
--- a/lua/gopher/health.lua
+++ b/lua/gopher/health.lua
@@ -4,9 +4,7 @@ local u = require "gopher._utils.health_util"
 
 local deps = {
   plugin = {
-    { lib = "dap", msg = "required for `gopher.dap`", optional = true },
-    { lib = "plenary", msg = "required for everything in gopher.nvim", optional = false },
-    { lib = "nvim-treesitter", msg = "required for everything in gopher.nvim", optional = false },
+    { lib = "nvim-treesitter", msg = "required for everything in gopher.nvim" },
   },
   bin = {
     {
@@ -14,17 +12,17 @@ local deps = {
       msg = "required for `:GoGet`, `:GoMod`, `:GoGenerate`, `:GoWork`, `:GoInstallDeps`",
       optional = false,
     },
-    { bin = cmd.gomodifytags, msg = "required for `:GoTagAdd`, `:GoTagRm`", optional = false },
-    { bin = cmd.impl, msg = "required for `:GoImpl`", optional = false },
-    { bin = cmd.iferr, msg = "required for `:GoIfErr`", optional = false },
+    { bin = cmd.gomodifytags, msg = "required for `:GoTagAdd`, `:GoTagRm`", optional = true },
+    { bin = cmd.impl, msg = "required for `:GoImpl`", optional = true },
+    { bin = cmd.iferr, msg = "required for `:GoIfErr`", optional = true },
     {
       bin = cmd.gotests,
       msg = "required for `:GoTestAdd`, `:GoTestsAll`, `:GoTestsExp`",
-      optional = false,
+      optional = true,
     },
   },
   treesitter = {
-    { parser = "go", msg = "required for `gopher.nvim`", optional = false },
+    { parser = "go", msg = "required for `gopher.nvim`" },
   },
 }
 
@@ -34,11 +32,7 @@ function health.check()
     if u.is_lualib_found(plugin.lib) then
       u.ok(plugin.lib .. " installed")
     else
-      if plugin.optional then
-        u.warn(plugin.lib .. " not found, " .. plugin.msg)
-      else
-        u.error(plugin.lib .. " not found, " .. plugin.msg)
-      end
+      u.error(plugin.lib .. " not found, " .. plugin.msg)
     end
   end
 
diff --git a/lua/gopher/iferr.lua b/lua/gopher/iferr.lua
index a3a193e..3258bd8 100644
--- a/lua/gopher/iferr.lua
+++ b/lua/gopher/iferr.lua
@@ -4,27 +4,33 @@
 ---@usage Execute `:GoIfErr` near any `err` variable to insert the check
 
 local c = require "gopher.config"
+local u = require "gopher._utils"
+local r = require "gopher._utils.runner"
 local log = require "gopher._utils.log"
 local iferr = {}
 
--- That's Lua implementation: github.com/koron/iferr
+-- That's Lua implementation: https://github.com/koron/iferr
 function iferr.iferr()
-  local boff = vim.fn.wordcount().cursor_bytes
+  local curb = vim.fn.wordcount().cursor_bytes
   local pos = vim.fn.getcurpos()[2]
+  local fpath = vim.fn.expand "%"
 
-  local data = vim.fn.systemlist((c.commands.iferr .. " -pos " .. boff), vim.fn.bufnr "%")
-  if vim.v.shell_error ~= 0 then
-    if string.find(data[1], "no functions at") then
-      vim.print "no function found"
-      log.warn("iferr: no function at " .. boff)
+  local rs = r.sync({ c.commands.iferr, "-pos", curb }, {
+    stdin = u.readfile_joined(fpath),
+  })
+
+  if rs.code ~= 0 then
+    if string.find(rs.stderr, "no functions at") then
+      u.notify("iferr: no function at " .. curb, vim.log.levels.ERROR)
+      log.warn("iferr: no function at " .. curb)
       return
     end
 
-    log.error("failed. output: " .. vim.inspect(data))
-    error("iferr failed: " .. vim.inspect(data))
+    log.error("ferr: failed. output: " .. rs.stderr)
+    error("iferr failed: " .. rs.stderr)
   end
 
-  vim.fn.append(pos, data)
+  vim.fn.append(pos, u.remove_empty_lines(vim.split(rs.stdout, "\n")))
   vim.cmd [[silent normal! j=2j]]
   vim.fn.setpos(".", pos)
 end
diff --git a/lua/gopher/impl.lua b/lua/gopher/impl.lua
index 4e1ec9a..0ed3e76 100644
--- a/lua/gopher/impl.lua
+++ b/lua/gopher/impl.lua
@@ -43,7 +43,7 @@ local impl = {}
 local function get_struct()
   local ns = ts_utils.get_struct_node_at_pos(unpack(vim.api.nvim_win_get_cursor(0)))
   if ns == nil then
-    u.deferred_notify("put cursor on a struct or specify a receiver", vim.log.levels.INFO)
+    u.notify "put cursor on a struct or specify a receiver"
     return ""
   end
 
@@ -82,21 +82,14 @@ function impl.impl(...)
     recv = string.format("%s %s", recv_name, recv)
   end
 
-  local output = r.sync(c.impl, {
-    args = {
-      "-dir",
-      vim.fn.fnameescape(vim.fn.expand "%:p:h" --[[@as string]]),
-      recv,
-      iface,
-    },
-    on_exit = function(data, status)
-      if not status == 0 then
-        error("impl failed: " .. data)
-      end
-    end,
-  })
+  local rs = r.sync { c.impl, "-dir", vim.fn.fnameescape(vim.fn.expand "%:p:h"), recv, iface }
+  if rs.code ~= 0 then
+    error("failed to implement interface: " .. rs.stderr)
+  end
 
   local pos = vim.fn.getcurpos()[2]
+  local output = u.remove_empty_lines(vim.split(rs.stdout, "\n"))
+
   table.insert(output, 1, "")
   vim.fn.append(pos, output)
 end
diff --git a/lua/gopher/installer.lua b/lua/gopher/installer.lua
index ac60c03..526e688 100644
--- a/lua/gopher/installer.lua
+++ b/lua/gopher/installer.lua
@@ -1,6 +1,7 @@
 local c = require("gopher.config").commands
 local r = require "gopher._utils.runner"
 local u = require "gopher._utils"
+local log = require "gopher._utils.log"
 local installer = {}
 
 local urls = {
@@ -10,25 +11,42 @@ local urls = {
   iferr = "github.com/koron/iferr",
 }
 
----@param pkg string
-local function install(pkg)
-  local url = urls[pkg] .. "@latest"
-  r.sync(c.go, {
-    args = { "install", url },
-    on_exit = function(data, status)
-      if not status == 0 then
-        error("go install failed: " .. data)
-        return
-      end
-      u.notify("installed: " .. url)
-    end,
-  })
+---@param opt vim.SystemCompleted
+---@param url string
+local function handle_intall_exit(opt, url)
+  if opt.code ~= 0 then
+    u.deferred_notify("go install failed: " .. url)
+    log.error("go install failed:", "url", url, "opt", vim.inspect(opt))
+    return
+  end
+
+  u.deferred_notify("go install-ed: " .. url)
+end
+
+---@param url string
+local function install(url)
+  r.async({ c.go, "install", url }, function(opt)
+    handle_intall_exit(opt, url)
+  end)
+end
+
+---@param url string
+local function install_sync(url)
+  local rs = r.sync { c.go, "install", url }
+  handle_intall_exit(rs, url)
 end
 
 ---Install required go deps
-function installer.install_deps()
+---@param opts? {sync:boolean}
+function installer.install_deps(opts)
+  opts = opts or {}
   for pkg, _ in pairs(urls) do
-    install(pkg)
+    local url = urls[pkg] .. "@latest"
+    if opts.sync then
+      install_sync(url)
+    else
+      install(url)
+    end
   end
 end
 
diff --git a/lua/gopher/struct_tags.lua b/lua/gopher/struct_tags.lua
index b3c9dc7..17e0d78 100644
--- a/lua/gopher/struct_tags.lua
+++ b/lua/gopher/struct_tags.lua
@@ -38,15 +38,8 @@ local function modify(...)
     return
   end
 
-  -- stylua: ignore
-  local cmd_args = {
-    "-transform", c.gotag.transform,
-    "-format", "json",
-    "-file", fpath,
-    "-w"
-  }
-
   -- by struct name of line pos
+  local cmd_args = {}
   if ns.name == nil then
     local _, csrow, _, _ = unpack(vim.fn.getpos ".")
     table.insert(cmd_args, "-line")
@@ -67,17 +60,24 @@ local function modify(...)
     table.insert(cmd_args, "json")
   end
 
-  local output = r.sync(c.commands.gomodifytags, {
-    args = cmd_args,
-    on_exit = function(data, status)
-      if not status == 0 then
-        error("gotag failed: " .. data)
-      end
-    end,
-  })
+  local rs = r.sync {
+    c.commands.gomodifytags,
+    "-transform",
+    c.gotag.transform,
+    "-format",
+    "json",
+    "-w",
+    "-file",
+    fpath,
+    unpack(cmd_args),
+  }
+
+  if rs.code ~= 0 then
+    error("failed to set tags " .. rs.stderr)
+  end
 
   -- decode value
-  local tagged = vim.json.decode(table.concat(output))
+  local tagged = vim.json.decode(rs.stdout)
   if
     tagged.errors ~= nil
     or tagged.lines == nil
diff --git a/plugin/gopher.vim b/plugin/gopher.vim
index a219a1c..b61ed6e 100644
--- a/plugin/gopher.vim
+++ b/plugin/gopher.vim
@@ -11,4 +11,5 @@ 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()
+command! GoInstallDepsSync :lua require"gopher".install_deps({ sync = true })
 command! GopherLog :lua vim.cmd("tabnew " .. require("gopher._utils.log").get_outfile())
diff --git a/scripts/minimal_init.lua b/scripts/minimal_init.lua
index e59f06a..503bf49 100644
--- a/scripts/minimal_init.lua
+++ b/scripts/minimal_init.lua
@@ -8,17 +8,23 @@ local function install_plug(plugin)
   local package_root = root ".tests/site/pack/deps/start/"
   if not vim.uv.fs_stat(package_root .. name) then
     print("Installing " .. plugin)
-    vim.fn.mkdir(package_root, "p")
-    vim.fn.system {
-      "git",
-      "clone",
-      "--depth=1",
-      "https://github.com/" .. plugin .. ".git",
-      package_root .. "/" .. name,
-    }
+    vim
+      .system({
+        "git",
+        "clone",
+        "--depth=1",
+        "https://github.com/" .. plugin .. ".git",
+        package_root .. "/" .. name,
+      })
+      :wait()
   end
 end
 
+install_plug "nvim-lua/plenary.nvim"
+install_plug "nvim-treesitter/nvim-treesitter"
+install_plug "echasnovski/mini.doc" -- used for docs generation
+install_plug "echasnovski/mini.test"
+
 vim.env.XDG_CONFIG_HOME = root ".tests/config"
 vim.env.XDG_DATA_HOME = root ".tests/data"
 vim.env.XDG_STATE_HOME = root ".tests/state"
@@ -27,16 +33,16 @@ vim.env.XDG_CACHE_HOME = root ".tests/cache"
 vim.cmd [[set runtimepath=$VIMRUNTIME]]
 vim.opt.runtimepath:append(root())
 vim.opt.packpath = { root ".tests/site" }
-vim.notify = print
-
-install_plug "nvim-lua/plenary.nvim"
-install_plug "nvim-treesitter/nvim-treesitter"
-install_plug "echasnovski/mini.doc" -- used for docs generation
-install_plug "echasnovski/mini.test"
+vim.notify = vim.print
 
 -- install go treesitter parse
 require("nvim-treesitter.install").ensure_installed_sync "go"
 
+require("gopher").setup {
+  log_level = vim.log.levels.OFF,
+  timeout = 4000,
+}
+
 -- setup mini.test only when running headless nvim
 if #vim.api.nvim_list_uis() == 0 then
   require("mini.test").setup {
diff --git a/spec/fixtures/impl/closer_output.go b/spec/fixtures/impl/closer_output.go
index 5e976f3..4f077f4 100644
--- a/spec/fixtures/impl/closer_output.go
+++ b/spec/fixtures/impl/closer_output.go
@@ -5,4 +5,3 @@ type CloserTest2 struct{}
 func (closertest *CloserTest2) Close() error {
 	panic("not implemented") // TODO: Implement
 }
-
diff --git a/spec/fixtures/impl/reader_output.go b/spec/fixtures/impl/reader_output.go
index 26df873..c384b23 100644
--- a/spec/fixtures/impl/reader_output.go
+++ b/spec/fixtures/impl/reader_output.go
@@ -4,5 +4,4 @@ func (r Read2) Read(p []byte) (n int, err error) {
 	panic("not implemented") // TODO: Implement
 }
 
-
 type Read2 struct{}
diff --git a/spec/fixtures/impl/writer_output.go b/spec/fixtures/impl/writer_output.go
index 19e8f6e..b69a70c 100644
--- a/spec/fixtures/impl/writer_output.go
+++ b/spec/fixtures/impl/writer_output.go
@@ -5,4 +5,3 @@ type WriterTest2 struct{}
 func (w *WriterTest2) Write(p []byte) (n int, err error) {
 	panic("not implemented") // TODO: Implement
 }
-