diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 22798a7e81f4..a45dc288746b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -88,7 +88,7 @@ repos:
         types_or: [c++, def]
         language: python
         args: ['-i']
-        additional_dependencies: ['clang-format==17.0.1']
+        additional_dependencies: ['clang-format==20.1.4']
 
   - repo: local
     hooks:
@@ -128,7 +128,7 @@ repos:
         files: ^.*/BUILD$
         pass_filenames: false
   - repo: https://github.com/PyCQA/flake8
-    rev: bddd87797f8dfc07d2a10c894776018d9bec590b # frozen: 7.1.2
+    rev: 4b5e89b4b108a6c1a000c591d334a99a80d34c7b # frozen: 7.2.0
     hooks:
       - id: flake8
   - repo: https://github.com/pre-commit/mirrors-mypy
diff --git a/bazel/cc_toolchains/clang_cc_toolchain_config.bzl b/bazel/cc_toolchains/clang_cc_toolchain_config.bzl
index 9c2067e0945c..f2a567c8ef7b 100644
--- a/bazel/cc_toolchains/clang_cc_toolchain_config.bzl
+++ b/bazel/cc_toolchains/clang_cc_toolchain_config.bzl
@@ -18,6 +18,7 @@ load(
     "with_feature_set",
 )
 load("@rules_cc//cc:defs.bzl", "cc_toolchain")
+load("@rules_cc//cc/common:cc_common.bzl", "cc_common")
 load(
     ":clang_detected_variables.bzl",
     "clang_bindir",
diff --git a/common/check_test.cpp b/common/check_test.cpp
index 63840e744198..203bf0db3e4e 100644
--- a/common/check_test.cpp
+++ b/common/check_test.cpp
@@ -17,8 +17,9 @@ auto AlwaysFalse() -> bool { return false; }
 TEST(CheckTest, CheckTrue) { CARBON_CHECK(AlwaysTrue()); }
 
 TEST(CheckTest, CheckFalse) {
-  ASSERT_DEATH({ CARBON_CHECK(AlwaysFalse()); },
-               R"(
+  ASSERT_DEATH(
+      { CARBON_CHECK(AlwaysFalse()); },
+      R"(
 CHECK failure at common/check_test.cpp:\d+: AlwaysFalse\(\)
 )");
 }
@@ -38,8 +39,9 @@ TEST(CheckTest, CheckTrueCallbackNotUsed) {
 }
 
 TEST(CheckTest, CheckFalseMessage) {
-  ASSERT_DEATH({ CARBON_CHECK(AlwaysFalse(), "msg"); },
-               R"(
+  ASSERT_DEATH(
+      { CARBON_CHECK(AlwaysFalse(), "msg"); },
+      R"(
 CHECK failure at common/check_test.cpp:.+: AlwaysFalse\(\): msg
 )");
 }
@@ -63,8 +65,9 @@ TEST(CheckTest, CheckOutputForms) {
 }
 
 TEST(CheckTest, Fatal) {
-  ASSERT_DEATH({ CARBON_FATAL("msg"); },
-               "\nFATAL failure at common/check_test.cpp:.+: msg\n");
+  ASSERT_DEATH(
+      { CARBON_FATAL("msg"); },
+      "\nFATAL failure at common/check_test.cpp:.+: msg\n");
 }
 
 TEST(CheckTest, FatalHasStackDump) {
@@ -74,8 +77,9 @@ TEST(CheckTest, FatalHasStackDump) {
 auto FatalNoReturnRequired() -> int { CARBON_FATAL("msg"); }
 
 TEST(ErrorTest, FatalNoReturnRequired) {
-  ASSERT_DEATH({ FatalNoReturnRequired(); },
-               "\nFATAL failure at common/check_test.cpp:.+: msg\n");
+  ASSERT_DEATH(
+      { FatalNoReturnRequired(); },
+      "\nFATAL failure at common/check_test.cpp:.+: msg\n");
 }
 
 // Detects whether `CARBON_CHECK(F())` compiles.
diff --git a/common/set_test.cpp b/common/set_test.cpp
index 27593025efcd..77e76461fc4c 100644
--- a/common/set_test.cpp
+++ b/common/set_test.cpp
@@ -405,9 +405,8 @@ TEST(SetContextTest, Basic) {
   auto i_result = s.Insert(1, IndexKeyContext<TestData>(keys));
   EXPECT_FALSE(i_result.is_inserted());
   EXPECT_TRUE(s.Contains(1, key_context));
-  EXPECT_TRUE(s.Insert(
-                   TestData(200), [] { return 2; }, key_context)
-                  .is_inserted());
+  EXPECT_TRUE(
+      s.Insert(TestData(200), [] { return 2; }, key_context).is_inserted());
   EXPECT_TRUE(s.Contains(2, key_context));
   EXPECT_TRUE(s.Contains(TestData(200), key_context));
 
diff --git a/scripts/scripts_utils.py b/scripts/scripts_utils.py
index abd5feae07b4..d1ee90202561 100644
--- a/scripts/scripts_utils.py
+++ b/scripts/scripts_utils.py
@@ -35,18 +35,18 @@ class ReleaseInfo(NamedTuple):
 
 
 _BAZEL_TOOLS_URL = (
-    "https://github.com/bazelbuild/buildtools/releases/download/v7.3.1/"
+    "https://github.com/bazelbuild/buildtools/releases/download/v8.2.0/"
 )
 
 # Structured information per release tool.
 _RELEASES = {
     Release.BAZELISK: ReleaseInfo(
-        "https://github.com/bazelbuild/bazelisk/releases/download/v1.25.0/", "-"
+        "https://github.com/bazelbuild/bazelisk/releases/download/v1.26.0/", "-"
     ),
     Release.BUILDIFIER: ReleaseInfo(_BAZEL_TOOLS_URL, "-"),
     Release.BUILDOZER: ReleaseInfo(_BAZEL_TOOLS_URL, "-"),
     Release.TARGET_DETERMINATOR: ReleaseInfo(
-        "https://github.com/bazel-contrib/target-determinator/releases/download/v0.30.0/",  # noqa: E501
+        "https://github.com/bazel-contrib/target-determinator/releases/download/v0.30.3/",  # noqa: E501
         ".",
     ),
 }
@@ -59,32 +59,32 @@ _RELEASES = {
 # to make copy-paste updates simpler.
 _RELEASE_SHAS = {
     Release.BAZELISK: {
-        "darwin-amd64": "0af019eeb642fa70744419d02aa32df55e6e7a084105d49fb26801a660aa56d3",  # noqa: E501
-        "darwin-arm64": "b13dd89c6ecd90944ca3539f5a2c715a18f69b7458878c471a902a8e482ceb4b",  # noqa: E501
-        "linux-amd64": "fd8fdff418a1758887520fa42da7e6ae39aefc788cf5e7f7bb8db6934d279fc4",  # noqa: E501
-        "linux-arm64": "4c8d966e40ac2c4efcc7f1a5a5cceef2c0a2f16b957e791fa7a867cce31e8fcb",  # noqa: E501
-        "windows-amd64.exe": "641a3dfebd717703675f912917735c44b45cf6300bfdfb924537f3cfbffcdd92",  # noqa: E501
+        "darwin-amd64": "5c77f33f91dd3df119d192175100cb5b50302eb7ee37859cbab79e10a76ccce8",  # noqa: E501
+        "darwin-arm64": "d1ca9911cc19e1f17483f93956908334f2b7f3dd13f20853417b68fc3c3eb370",  # noqa: E501
+        "linux-amd64": "6539c12842ad76966f3d493e8f80d67caa84ec4a000e220d5459833c967c12bc",  # noqa: E501
+        "linux-arm64": "54f85ef4c23393f835252cc882e5fea596e8ef3c4c2056b059f8067cd19f0351",  # noqa: E501
+        "windows-amd64.exe": "023734f33ed6b9c6d65468fe20bb2c5fb32473ccb8aca2fc5bf1521e61ce1622",  # noqa: E501
     },
     Release.BUILDIFIER: {
-        "darwin-amd64": "375f823103d01620aaec20a0c29c6cbca99f4fd0725ae30b93655c6704f44d71",  # noqa: E501
-        "darwin-arm64": "5a6afc6ac7a09f5455ba0b89bd99d5ae23b4174dc5dc9d6c0ed5ce8caac3f813",  # noqa: E501
-        "linux-amd64": "5474cc5128a74e806783d54081f581662c4be8ae65022f557e9281ed5dc88009",  # noqa: E501
-        "linux-arm64": "0bf86c4bfffaf4f08eed77bde5b2082e4ae5039a11e2e8b03984c173c34a561c",  # noqa: E501
-        "windows-amd64.exe": "370cd576075ad29930a82f5de132f1a1de4084c784a82514bd4da80c85acf4a8",  # noqa: E501
+        "darwin-amd64": "309b3c3bfcc4b1533d5f7f796adbd266235cfb6f01450f3e37423527d209a309",  # noqa: E501
+        "darwin-arm64": "e08381a3ed1d59c0a17d1cee1d4e7684c6ce1fc3b5cfa1bd92a5fe978b38b47d",  # noqa: E501
+        "linux-amd64": "3e79e6c0401b5f36f8df4dfc686127255d25c7eddc9599b8779b97b7ef4cdda7",  # noqa: E501
+        "linux-arm64": "c624a833bfa64d3a457ef0235eef0dbda03694768aab33f717a7ffd3f803d272",  # noqa: E501
+        "windows-amd64.exe": "a27fcf7521414f8214787989dcfb2ac7d3f7c28b56e44384e5fa06109953c2f1",  # noqa: E501
     },
     Release.BUILDOZER: {
-        "darwin-amd64": "854c9583efc166602276802658cef3f224d60898cfaa60630b33d328db3b0de2",  # noqa: E501
-        "darwin-arm64": "31b1bfe20d7d5444be217af78f94c5c43799cdf847c6ce69794b7bf3319c5364",  # noqa: E501
-        "linux-amd64": "3305e287b3fcc68b9a35fd8515ee617452cd4e018f9e6886b6c7cdbcba8710d4",  # noqa: E501
-        "linux-arm64": "0b5a2a717ac4fc911e1fec8d92af71dbb4fe95b10e5213da0cc3d56cea64a328",  # noqa: E501
-        "windows-amd64.exe": "58d41ce53257c5594c9bc86d769f580909269f68de114297f46284fbb9023dcf",  # noqa: E501
+        "darwin-amd64": "b7bd7189a9d4de22c10fd94b7d1d77c68712db9bdd27150187bc677e8c22960e",  # noqa: E501
+        "darwin-arm64": "781527c5337dadba5a0611c01409c669852b73b72458650cc7c5f31473f7ae3f",  # noqa: E501
+        "linux-amd64": "0e54770aa6148384d1edde39ef20e10d2c57e8c09dd42f525e100f51b0b77ae1",  # noqa: E501
+        "linux-arm64": "a9f38f2781de41526ce934866cb79b8b5b59871c96853dc5a1aee26f4c5976bb",  # noqa: E501
+        "windows-amd64.exe": "8ce5a9a064b01551ffb8d441fa9ef4dd42c9eeeed6bc71a89f917b3474fd65f6",  # noqa: E501
     },
     Release.TARGET_DETERMINATOR: {
-        "darwin.amd64": "faa79bed4f3b516e64532beafabf4c340aa0f67c52770d9e74782b8d32033b8c",  # noqa: E501
-        "darwin.arm64": "0536158d45ac9d59e5fb5fd9f061a407f28e9e3d9d95ccaa4832583ed4cf13b8",  # noqa: E501
-        "linux.amd64": "2c75ff991eb5fe46d6df3f6266cac8fb8f3abf4037be486e4c5dc871bd6c4d64",  # noqa: E501
-        "linux.arm64": "5ec31448c87a972583e0213028e83fefe7f566ccc9d64412e333ed12390573c5",  # noqa: E501
-        "windows.amd64.exe": "11449d0388deae5b04372be35e4b480f3beeffa8b954e707d60ebd15d3ebe428",  # noqa: E501
+        "darwin.amd64": "04adf78f763e622467181669fdf275e01edc1ec3d79940e78040127a15b7c8b2",  # noqa: E501
+        "darwin.arm64": "f59ee18404577a704bc1399907c35b546fd66ffd5a1e145e7955a3d3e57a2a13",  # noqa: E501
+        "linux.amd64": "6eaa8921e6c614c309536af3dc7ca23f52e5ced30b9032e6443bbe0d41a8ae33",  # noqa: E501
+        "linux.arm64": "1c7216426d4e2ca63b912fe2be2ab8f3f9ccbe2aefa174e2a22e7f19f5f36065",  # noqa: E501
+        "windows.amd64.exe": "53d377274c40b1a0e37db96c20fa4b701d1e5e2650af14517c49e170b2564736",  # noqa: E501
     },
 }
 
diff --git a/toolchain/check/eval.cpp b/toolchain/check/eval.cpp
index a24bc521cbd2..b67940b2fc5f 100644
--- a/toolchain/check/eval.cpp
+++ b/toolchain/check/eval.cpp
@@ -649,7 +649,7 @@ static auto GetConstantValue(EvalContext& eval_context,
 // has runtime phase.
 template <typename InstT, typename FieldIdT>
 static auto ReplaceFieldWithConstantValue(EvalContext& eval_context,
-                                          InstT* inst, FieldIdT InstT::*field,
+                                          InstT* inst, FieldIdT InstT::* field,
                                           Phase* phase) -> bool {
   auto unwrapped = GetConstantValue(eval_context, inst->*field, phase);
   if (!unwrapped.has_value() && (inst->*field).has_value()) {
diff --git a/toolchain/lex/lex.cpp b/toolchain/lex/lex.cpp
index c7cf18d30f31..8311a77d29ec 100644
--- a/toolchain/lex/lex.cpp
+++ b/toolchain/lex/lex.cpp
@@ -533,7 +533,8 @@ static auto DispatchNext(Lexer& lexer, llvm::StringRef source_text,
 // and continuing the dispatch.
 #define CARBON_DISPATCH_LEX_TOKEN(LexMethod)                                 \
   static auto Dispatch##LexMethod(Lexer& lexer, llvm::StringRef source_text, \
-                                  ssize_t position) -> void {                \
+                                  ssize_t position)                          \
+      ->void {                                                               \
     Lexer::LexResult result = lexer.LexMethod(source_text, position);        \
     CARBON_CHECK(result, "Failed to form a token!");                         \
     [[clang::musttail]] return DispatchNext(lexer, source_text, position);   \
@@ -546,16 +547,17 @@ CARBON_DISPATCH_LEX_TOKEN(LexNumericLiteral)
 CARBON_DISPATCH_LEX_TOKEN(LexStringLiteral)
 
 // A set of custom dispatch functions that pre-select the symbol token to lex.
-#define CARBON_DISPATCH_LEX_SYMBOL_TOKEN(LexMethod)                          \
-  static auto Dispatch##LexMethod##SymbolToken(                              \
-      Lexer& lexer, llvm::StringRef source_text, ssize_t position) -> void { \
-    Lexer::LexResult result = lexer.LexMethod##SymbolToken(                  \
-        source_text,                                                         \
-        OneCharTokenKindTable[static_cast<unsigned char>(                    \
-            source_text[position])],                                         \
-        position);                                                           \
-    CARBON_CHECK(result, "Failed to form a token!");                         \
-    [[clang::musttail]] return DispatchNext(lexer, source_text, position);   \
+#define CARBON_DISPATCH_LEX_SYMBOL_TOKEN(LexMethod)                        \
+  static auto Dispatch##LexMethod##SymbolToken(                            \
+      Lexer& lexer, llvm::StringRef source_text, ssize_t position)         \
+      ->void {                                                             \
+    Lexer::LexResult result = lexer.LexMethod##SymbolToken(                \
+        source_text,                                                       \
+        OneCharTokenKindTable[static_cast<unsigned char>(                  \
+            source_text[position])],                                       \
+        position);                                                         \
+    CARBON_CHECK(result, "Failed to form a token!");                       \
+    [[clang::musttail]] return DispatchNext(lexer, source_text, position); \
   }
 CARBON_DISPATCH_LEX_SYMBOL_TOKEN(LexOneChar)
 CARBON_DISPATCH_LEX_SYMBOL_TOKEN(LexOpening)
@@ -565,7 +567,8 @@ CARBON_DISPATCH_LEX_SYMBOL_TOKEN(LexClosing)
 // whitespace and comments.
 #define CARBON_DISPATCH_LEX_NON_TOKEN(LexMethod)                             \
   static auto Dispatch##LexMethod(Lexer& lexer, llvm::StringRef source_text, \
-                                  ssize_t position) -> void {                \
+                                  ssize_t position)                          \
+      ->void {                                                               \
     lexer.LexMethod(source_text, position);                                  \
     [[clang::musttail]] return DispatchNext(lexer, source_text, position);   \
   }
diff --git a/toolchain/parse/handle.h b/toolchain/parse/handle.h
index c42782b2f955..e396be1a91e6 100644
--- a/toolchain/parse/handle.h
+++ b/toolchain/parse/handle.h
@@ -10,7 +10,7 @@
 namespace Carbon::Parse {
 
 // Declare handlers for each parse state.
-#define CARBON_PARSE_STATE(Name) auto Handle##Name(Context& context) -> void;
+#define CARBON_PARSE_STATE(Name) auto Handle##Name(Context& context)->void;
 #include "toolchain/parse/state.def"
 
 }  // namespace Carbon::Parse
diff --git a/toolchain/sem_ir/inst.h b/toolchain/sem_ir/inst.h
index 0aac01f0c716..6addff57501b 100644
--- a/toolchain/sem_ir/inst.h
+++ b/toolchain/sem_ir/inst.h
@@ -457,7 +457,7 @@ class InstStore {
   // instruction and its ID are returned. Otherwise returns {nullopt, None}.
   template <typename InstT, typename InstIdT>
     requires std::derived_from<InstIdT, InstId>
-  auto TryUnwrap(Inst& inst, InstId& inst_id, InstIdT InstT::*member) const
+  auto TryUnwrap(Inst& inst, InstId& inst_id, InstIdT InstT::* member) const
       -> std::pair<std::optional<InstT>, InstId> {
     if (auto wrapped_inst = inst.TryAs<InstT>()) {
       auto wrapped_inst_id = inst_id;