diff --git a/.clang-format b/.clang-format
index 1a6a5b59..0c76c2c0 100644
--- a/.clang-format
+++ b/.clang-format
@@ -35,7 +35,29 @@ AlignConsecutiveShortCaseStatements:
   Enabled:         false
   AcrossEmptyLines: false
   AcrossComments:  false
+  AlignCaseArrows: false
   AlignCaseColons: false
+AlignConsecutiveTableGenBreakingDAGArgColons:
+  Enabled:         false
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCompound:   false
+  AlignFunctionPointers: false
+  PadOperators:    false
+AlignConsecutiveTableGenCondOperatorColons:
+  Enabled:         false
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCompound:   false
+  AlignFunctionPointers: false
+  PadOperators:    false
+AlignConsecutiveTableGenDefinitionColons:
+  Enabled:         false
+  AcrossEmptyLines: false
+  AcrossComments:  false
+  AlignCompound:   false
+  AlignFunctionPointers: false
+  PadOperators:    false
 AlignEscapedNewlines: Right
 AlignOperands:   Align
 AlignTrailingComments:
@@ -45,6 +67,7 @@ AllowAllArgumentsOnNextLine: true
 AllowAllParametersOfDeclarationOnNextLine: true
 AllowBreakBeforeNoexceptSpecifier: Never
 AllowShortBlocksOnASingleLine: Never
+AllowShortCaseExpressionOnASingleLine: true
 AllowShortCaseLabelsOnASingleLine: false
 AllowShortCompoundRequirementOnASingleLine: true
 AllowShortEnumsOnASingleLine: true
@@ -53,9 +76,7 @@ AllowShortIfStatementsOnASingleLine: Never
 AllowShortLambdasOnASingleLine: All
 AllowShortLoopsOnASingleLine: false
 AlwaysBreakAfterDefinitionReturnType: None
-AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: false
-AlwaysBreakTemplateDeclarations: MultiLine
 AttributeMacros:
   - __capability
 BinPackArguments: true
@@ -83,6 +104,7 @@ BraceWrapping:
 BreakAdjacentStringLiterals: true
 BreakAfterAttributes: Leave
 BreakAfterJavaFieldAnnotations: false
+BreakAfterReturnType: None
 BreakArrays:     true
 BreakBeforeBinaryOperators: None
 BreakBeforeConceptDeclarations: Always
@@ -90,8 +112,10 @@ BreakBeforeBraces: Attach
 BreakBeforeInlineASMColon: OnlyMultiline
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializers: BeforeColon
+BreakFunctionDefinitionParameters: false
 BreakInheritanceList: BeforeColon
 BreakStringLiterals: true
+BreakTemplateDeclarations: MultiLine
 ColumnLimit:     80
 CommentPragmas:  '^ IWYU pragma:'
 CompactNamespaces: false
@@ -147,12 +171,15 @@ IntegerLiteralSeparator:
   HexMinDigits:    0
 JavaScriptQuotes: Leave
 JavaScriptWrapImports: true
-KeepEmptyLinesAtTheStartOfBlocks: false
-KeepEmptyLinesAtEOF: false
+KeepEmptyLines:
+  AtEndOfFile:     false
+  AtStartOfBlock:  false
+  AtStartOfFile:   true
 LambdaBodyIndentation: Signature
 LineEnding:      DeriveLF
 MacroBlockBegin: ''
 MacroBlockEnd:   ''
+MainIncludeChar: Quote
 MaxEmptyLinesToKeep: 1
 NamespaceIndentation: None
 ObjCBinPackProtocolList: Auto
@@ -221,6 +248,7 @@ SpacesInLineCommentPrefix:
   Maximum:         -1
 SpacesInParens:  Never
 SpacesInParensOptions:
+  ExceptDoubleParentheses: false
   InCStyleCasts:   false
   InConditionalStatements: false
   InEmptyParentheses: false
@@ -238,6 +266,7 @@ StatementMacros:
   - nghttp3_min_def
   - nghttp3_objalloc_decl
   - nghttp3_objalloc_def
+TableGenBreakInsideDAGArg: DontBreak
 TabWidth:        8
 UseTab:          Never
 VerilogBreakBetweenInstancePorts: true
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8f2a3322..2d4a8852 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,7 +29,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install \
           g++-14 \
-          clang-18 \
+          clang-19 \
           autoconf \
           automake \
           autotools-dev \
@@ -50,8 +50,8 @@ jobs:
     - name: Setup clang (Linux)
       if: runner.os == 'Linux' && matrix.compiler == 'clang'
       run: |
-        echo 'CC=clang-18' >> $GITHUB_ENV
-        echo 'CXX=clang++-18' >> $GITHUB_ENV
+        echo 'CC=clang-19' >> $GITHUB_ENV
+        echo 'CXX=clang++-19' >> $GITHUB_ENV
     - name: Setup clang (MacOS)
       if: runner.os == 'macOS' && matrix.compiler == 'clang'
       run: |