diff --git a/style/cpp/.clang-tidy b/style/cpp/.clang-tidy
new file mode 100644
index 0000000..16fff78
--- /dev/null
+++ b/style/cpp/.clang-tidy
@@ -0,0 +1,17 @@
+Checks: '
+    -*,
+    readability-function-size,
+    readability-function-cognitive-complexity
+'
+CheckOptions:
+  - { key: readability-function-size.LineThreshold,             value: 60 } # [1]
+  - { key: readability-function-size.ParameterThreshold,        value: 6 }  # [2]
+  - { key: readability-function-cognitive-complexity.Threshold, value: 25 } # [3]
+
+# [1] https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#f3-keep-functions-short-and-simple
+# [2] https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#f2-a-function-should-perform-a-single-logical-operation
+# [3] https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#f3-keep-functions-short-and-simple
+# However cognitive complexity != cyclomatic complexity. Therefore using the clang-tidy default value,
+# as cyclomatic complexity seems to not be implemented in clang-tidy.
+
+# [1],[2],[3] do not have to be enforced or applied project-wide yet.