diff --git a/.clang-format b/.clang-format
index da0e3b8..d4b2d2f 100644
--- a/.clang-format
+++ b/.clang-format
@@ -6,3 +6,6 @@ AlignAfterOpenBracket: AlwaysBreak
 BinPackArguments: false
 BinPackParameters: false
 ColumnLimit: 100
+BreakTemplateDeclarations: Yes
+SpaceAfterTemplateKeyword: false
+QualifierAlignment: Right
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index fb02dfa..1c54835 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -41,7 +41,7 @@ jobs:
         if: ${{ matrix.fuzz }}
 
   pre-commit:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@v6
@@ -49,16 +49,20 @@ jobs:
       - run: pre-commit run --all-files
 
   clang-format:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@v6
-      - run: sudo apt-get update && sudo apt-get install --assume-yes --no-install-recommends clang-format-18
-      - run: find . -name "*.h" -o -name "*.cc" | xargs clang-format-18 -style=file -i
+      - name: Set up the llvm repository
+        run: |
+          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+          sudo apt-add-repository "deb http://apt.llvm.org/noble/ llvm-toolchain-noble-19 main"
+      - run: sudo apt-get update && sudo apt-get install --no-install-recommends clang-format-19
+      - run: find . -name "*.h" -o -name "*.cc" | xargs clang-format-19 -style=file -i
       - run: git diff --exit-code
 
   buildifier:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@v6
@@ -66,7 +70,7 @@ jobs:
       - run: ./buildifier --lint=warn --warnings=all -mode diff $(find . -type f -iname "*.bazel" -or -iname "*.bzl")
 
   prettier:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-slim
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@v6
diff --git a/starlark/parser.h b/starlark/parser.h
index 9b8d1da..d4142d9 100644
--- a/starlark/parser.h
+++ b/starlark/parser.h
@@ -449,7 +449,8 @@ class Parser {
         return true;
     }
 
-    template <typename T> [[nodiscard]] std::optional<T> next_token_as() {
+    template<typename T>
+    [[nodiscard]] std::optional<T> next_token_as() {
         auto next = next_token();
         if (!next) {
             std::cerr << "Unexpected end of input.\n";
diff --git a/starlark/token.h b/starlark/token.h
index 18f928c..bf92a43 100644
--- a/starlark/token.h
+++ b/starlark/token.h
@@ -309,20 +309,20 @@ struct Identifier {
     constexpr bool operator==(Identifier const &) const = default;
 };
 
-constexpr std::string_view to_string(const Identifier &id) { return id.name; }
+constexpr std::string_view to_string(Identifier const &id) { return id.name; }
 
 struct StringLiteral {
     std::string value;
     constexpr bool operator==(StringLiteral const &) const = default;
 };
 
-inline std::string to_string(const StringLiteral &str) { return std::format(R"("{}")", str.value); }
+inline std::string to_string(StringLiteral const &str) { return std::format(R"("{}")", str.value); }
 
 struct Eof {
     constexpr bool operator==(Eof const &) const = default;
 };
 
-constexpr std::string_view to_string(const Eof &) { return "<eof>"; }
+constexpr std::string_view to_string(Eof const &) { return "<eof>"; }
 
 } // namespace token
 
@@ -387,7 +387,7 @@ using Token = std::variant<
     token::StringLiteral,
     token::Eof>;
 
-inline std::string to_string(const Token &token) {
+inline std::string to_string(Token const &token) {
     return std::visit([](auto &&arg) { return std::string{to_string(arg)}; }, token);
 }
 
diff --git a/starlark/tokenizer.h b/starlark/tokenizer.h
index b27e4e9..7d0150b 100644
--- a/starlark/tokenizer.h
+++ b/starlark/tokenizer.h
@@ -178,7 +178,7 @@ class Tokenizer {
     }
 
     std::optional<Token> tokenize_punctuator() {
-        static const auto puncts = [] {
+        static auto const puncts = [] {
             auto punctuators = std::to_array<std::pair<std::string_view, Token>>({
                 {"+", token::Plus{}},
                 {"-", token::Minus{}},
@@ -232,7 +232,7 @@ class Tokenizer {
             return punctuators;
         }();
 
-        for (const auto &[str, punctuator] : puncts) {
+        for (auto const &[str, punctuator] : puncts) {
             if (input_.substr(pos_, str.size()) == str) {
                 pos_ += str.size();
                 return punctuator;
diff --git a/starlark/tokenizer_test.cc b/starlark/tokenizer_test.cc
index cc7363b..d176992 100644
--- a/starlark/tokenizer_test.cc
+++ b/starlark/tokenizer_test.cc
@@ -19,7 +19,7 @@
 int main() {
     namespace t = starlark::token;
 
-    const auto test_cases =
+    auto const test_cases =
         std::to_array<std::pair<std::string_view, std::optional<std::vector<starlark::Token>>>>({
             {
                 R"(load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test"))",
@@ -40,7 +40,7 @@ int main() {
 
     etest::Suite s{};
 
-    for (const auto &[input, expected] : test_cases) {
+    for (auto const &[input, expected] : test_cases) {
         s.add_test(std::string{input}, [input, &expected](etest::IActions &a) {
             auto tokens = starlark::tokenize(input);
             a.expect_eq(tokens, expected);