diff --git a/README.md b/README.md
index 5fd876d..816f987 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ print(foo:parent()) -- "/home/user/Documents"
 
 ``` lua
 local git_root = Path("/path/to/git/workdir")
--- assert(git_root:child(".git"):exists(), string.format("%s is not a git repo.", git_root))
+assert(git_root:child(".git"):exists(), string.format("%s is not a git repo.", git_root))
 
 require("pathlib.git").fill_git_state({ file_a, file_b, ... })
 
@@ -185,8 +185,18 @@ end)
 # TODO
 
 - [ ] API documentation.
-- [ ] Git operation integration.
+  - [x] PathlibPath
+  - [x] PathlibPosixPath
+  - [x] PathlibWindowsPath
+  - [ ] Git
+- [x] Git operation integration.
+- [ ] Git test suite.
+  - [ ] List out every possible git state: ignored, staged etc.
+  - [ ] Create file for each state.
+  - [ ] Add docs for each state: `man git-diff -> RAW OUTPUT FORMAT`
 - [ ] Windows implementation, test environment.
+  - [ ] Create a CI/CD action to run on windows.
+  - [ ] Prepare windows specific test suite.
 
 # Contributions
 
diff --git a/README.norg b/README.norg
index a1a7821..1013f0f 100644
--- a/README.norg
+++ b/README.norg
@@ -4,7 +4,7 @@ description:
 authors: takuto
 categories:
 created: 2023-11-14
-updated: 2024-02-18T12:33:58+0900
+updated: 2024-02-19T08:41:11+0900
 version: 1.1.1
 @end
 
@@ -58,7 +58,7 @@ version: 1.1.1
 ** 📋 Git Integration
    @code lua
    local git_root = Path("/path/to/git/workdir")
-   -- assert(git_root:child(".git"):exists(), string.format("%s is not a git repo.", git_root))
+   assert(git_root:child(".git"):exists(), string.format("%s is not a git repo.", git_root))
 
    require("pathlib.git").fill_git_state({ file_a, file_b, ... })
 
@@ -194,9 +194,19 @@ version: 1.1.1
    @end
 
 * TODO
-  - ( ) API documentation.
-  - (-) Git operation integration.
+  - (-) API documentation.
+  -- (x) PathlibPath
+  -- (x) PathlibPosixPath
+  -- (x) PathlibWindowsPath
+  -- ( ) Git
+  - (x) Git operation integration.
+  - ( ) Git test suite.
+  -- ( ) List out every possible git state: ignored, staged etc.
+  -- ( ) Create file for each state.
+  -- ( ) Add docs for each state: `man git-diff -> RAW OUTPUT FORMAT`
   - ( ) Windows implementation, test environment.
+  -- ( ) Create a CI/CD action to run on windows.
+  -- ( ) Prepare windows specific test suite.
 
 * Contributions
   I am not thinking of merging any PRs yet but feel free to give me your opinions with an issue.
diff --git a/lua/pathlib/base.lua b/lua/pathlib/base.lua
index 3fc66c2..1541668 100644
--- a/lua/pathlib/base.lua
+++ b/lua/pathlib/base.lua
@@ -1002,7 +1002,7 @@ end
 ---
 ---If result is passed to the `:!` command, set `special` to true.
 ---
----@param special boolean|nil # If true, special items such as "!", "%", "#" and "<cword>" will be preceded by a backslash. The backslash will be removed again by the |:!| command. See `:h shellescape` for more details. The <NL> character is escaped.
+---@param special boolean|nil # If true, special items such as "!", "%", "#" and "<cword>" will be preceded by a backslash. The backslash will be removed again by the `:!` command. See `:h shellescape` for more details. The <NL> character is escaped.
 ---@return PathlibString
 function Path:shell_string(special)
   local s = table.concat(
diff --git a/lua/pathlib/utils/init.lua b/lua/pathlib/utils/init.lua
index d01a247..9bcf912 100644
--- a/lua/pathlib/utils/init.lua
+++ b/lua/pathlib/utils/init.lua
@@ -1,3 +1,5 @@
+local nuv = require("pathlib.utils.nuv")
+
 local M = {
   tables = require("pathlib.utils.tables"),
   lists = require("pathlib.utils.lists"),
@@ -14,6 +16,9 @@ end
 ---@return boolean success
 ---@return string[] result_lines # Each line of the output from the command.
 function M.execute_command(cmd, input)
+  if nuv.check_nio_install() and nuv.current_task() then
+    return nuv.execute_command(cmd, input)
+  end
   local result = vim.system(cmd, { stdin = input }):wait()
   if result.code == 0 then
     return true, vim.split(result.stdout or "", "\n", { plain = true, trimempty = false })
diff --git a/lua/pathlib/utils/nuv.lua b/lua/pathlib/utils/nuv.lua
index 4c33c62..7f75b8e 100644
--- a/lua/pathlib/utils/nuv.lua
+++ b/lua/pathlib/utils/nuv.lua
@@ -30,6 +30,26 @@ function M.current_task()
   end
 end
 
+function M.execute_command(cmd, input)
+  local process, err_msg = M.nio.process.run({
+    cmd = cmd[1],
+    args = { unpack(cmd, 2) },
+  })
+  if not process then
+    return false, { err_msg }
+  end
+  for i, value in ipairs(input or {}) do
+    local err = process.stdin.write(value .. "\n")
+    assert(not err, ([[ERROR cmd: '%s', input(%s): '%s', error: %s]]):format(table.concat(cmd, " "), i, value, err))
+  end
+  process.stdin.close()
+  if process.result() == 0 then
+    return true, vim.split(process.stdout.read() or "", "\n", { plain = true, trimempty = false })
+  else
+    return false, {}
+  end
+end
+
 ---@param self PathlibPath
 function M.generate_nuv(self)
   return setmetatable({}, {