Blocker to add clang-tidy support is resolved
The readme states
clang-tidy
support will be added after https://bugs.llvm.org//show_bug.cgi?id=32739 is fixed.
The LLVM bug tracker was moved to GitHub (see also !99 (merged)). Thus, it went unnoticed that LLVM resolved the bug and you can carry on with clang-tidy support. Great news!