diff --git a/lldb/.clang-tidy b/lldb/.clang-tidy
new file mode 100644
--- /dev/null
+++ b/lldb/.clang-tidy
@@ -0,0 +1,21 @@
+# Almost identical to the top-level .clang-tidy, except that
+# - FunctionCase uses CamelCase
+# - {Member,Parameter,Variable}Case use lower_case
+Checks: '-*,clang-diagnostic-*,llvm-*,misc-*,-misc-unused-parameters,-misc-non-private-member-variables-in-classes,readability-identifier-naming'
+CheckOptions:
+  - key:             readability-identifier-naming.ClassCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.EnumCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.FunctionCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.MemberCase
+    value:           lower_case
+  - key:             readability-identifier-naming.ParameterCase
+    value:           lower_case
+  - key:             readability-identifier-naming.UnionCase
+    value:           CamelCase
+  - key:             readability-identifier-naming.VariableCase
+    value:           lower_case
+  - key:             readability-identifier-naming.IgnoreMainLikeFunctions
+    value:           1