diff --git a/.codespell_words b/.codespell_words
new file mode 100644
index 0000000..21b7f9d
--- /dev/null
+++ b/.codespell_words
@@ -0,0 +1,2 @@
+unexpect
+OT
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..05a48fc
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,13 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/format.yaml b/.github/workflows/format.yaml
new file mode 100644
index 0000000..c34f5c4
--- /dev/null
+++ b/.github/workflows/format.yaml
@@ -0,0 +1,17 @@
+name: Format
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  pre-commit:
+    name: pre-commit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: pre-commit/action@v3.0.1
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..ecebeb6
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,37 @@
+repos:
+  # Standard hooks
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: check-added-large-files
+      - id: check-ast
+      - id: check-builtin-literals
+      - id: fix-byte-order-marker
+      - id: check-case-conflict
+      - id: check-docstring-first
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+      - id: check-symlinks
+      - id: check-toml
+      - id: check-vcs-permalinks
+      - id: check-yaml
+      - id: debug-statements
+      - id: destroyed-symlinks
+      - id: detect-private-key
+      - id: end-of-file-fixer
+      - id: fix-byte-order-marker
+      - id: fix-encoding-pragma
+      - id: forbid-new-submodules
+      - id: mixed-line-ending
+      - id: name-tests-test
+      - id: requirements-txt-fixer
+      - id: sort-simple-yaml
+      - id: trailing-whitespace
+
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.4.1
+    hooks:
+      - id: codespell
+        args: ['--write-changes', '--ignore-words=.codespell_words']
+        exclude: CHANGELOG.rst
diff --git a/tl_expected/include/tl_expected/expected.hpp b/tl_expected/include/tl_expected/expected.hpp
index 06e6dc4..ae90975 100644
--- a/tl_expected/include/tl_expected/expected.hpp
+++ b/tl_expected/include/tl_expected/expected.hpp
@@ -56,7 +56,7 @@
 #if (TL_CPLUSPLUS > 201103L) && !defined(TL_EXPECTED_GCC49)
 #include <cassert>
 #define TL_ASSERT(x) assert(x)
-#else 
+#else
 #define TL_ASSERT(x)
 #endif
 #endif
@@ -132,7 +132,7 @@ struct is_trivially_copy_constructible<std::vector<T, A>> : std::false_type {};
 #define TL_EXPECTED_11_CONSTEXPR constexpr
 #endif
 
-#if TL_CPLUSPLUS >= 201703L 
+#if TL_CPLUSPLUS >= 201703L
 #define TL_EXPECTED_NODISCARD [[nodiscard]]
 #else
 #define TL_EXPECTED_NODISCARD
@@ -534,7 +534,7 @@ template <class T, class E> struct expected_storage_base<T, E, true, true> {
                                            Args &&...args)
       : m_unexpect(il, std::forward<Args>(args)...), m_has_val(false) {}
 
-  expected_storage_base(const expected_storage_base &) = default;     
+  expected_storage_base(const expected_storage_base &) = default;
   expected_storage_base(expected_storage_base &&) = default;
   expected_storage_base &operator=(const expected_storage_base &) = default;
   expected_storage_base &operator=(expected_storage_base &&) = default;
@@ -651,9 +651,9 @@ template <class E> struct expected_storage_base<void, E, false, true> {
   //no constexpr for GCC 4/5 bug
   #else
   TL_EXPECTED_MSVC2015_CONSTEXPR
-  #endif 
+  #endif
   expected_storage_base() : m_has_val(true) {}
-     
+
   constexpr expected_storage_base(no_init_t) : m_val(), m_has_val(false) {}
 
   constexpr expected_storage_base(in_place_t) : m_has_val(true) {}