Index: clang-tools-extra/clangd/ConfigYAML.cpp
===================================================================
--- clang-tools-extra/clangd/ConfigYAML.cpp
+++ clang-tools-extra/clangd/ConfigYAML.cpp
@@ -128,6 +128,7 @@
     Dict.handle("UnusedIncludes", [&](Node &N) {
       F.UnusedIncludes = scalarValue(N, "UnusedIncludes");
     });
+    Dict.handle("Includes", [&](Node &N) { parse(F.Includes, N); });
     Dict.handle("ClangTidy", [&](Node &N) { parse(F.ClangTidy, N); });
     Dict.parse(N);
   }
@@ -154,6 +155,15 @@
     Dict.parse(N);
   }
 
+  void parse(Fragment::DiagnosticsBlock::IncludesBlock &F, Node &N) {
+    DictParser Dict("Includes", this);
+    Dict.handle("IgnoreHeader", [&](Node &N) {
+      if (auto Values = scalarValues(N))
+        F.IgnoreHeader = std::move(*Values);
+    });
+    Dict.parse(N);
+  }
+
   void parse(Fragment::IndexBlock &F, Node &N) {
     DictParser Dict("Index", this);
     Dict.handle("Background",
Index: clang-tools-extra/clangd/unittests/ConfigYAMLTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/ConfigYAMLTests.cpp
+++ clang-tools-extra/clangd/unittests/ConfigYAMLTests.cpp
@@ -247,6 +247,20 @@
   EXPECT_EQ(Results[0].InlayHints.DeducedTypes, llvm::None);
 }
 
+TEST(ParseYAML, IncludesIgnoreHeader) {
+  CapturedDiags Diags;
+  Annotations YAML(R"yaml(
+Diagnostics:
+  Includes:
+    IgnoreHeader: [foo, bar]
+  )yaml");
+  auto Results =
+      Fragment::parseYAML(YAML.code(), "config.yaml", Diags.callback());
+  ASSERT_THAT(Diags.Diagnostics, IsEmpty());
+  ASSERT_EQ(Results.size(), 1u);
+  EXPECT_THAT(Results[0].Diagnostics.Includes.IgnoreHeader,
+              ElementsAre(val("foo"), val("bar")));
+}
 } // namespace
 } // namespace config
 } // namespace clangd