I've been digging through GH's REST API, and it looks like we can do an auto-review for PRs. I have to keep digging for more details, but I'd like to switch from posting a PR comment to creating a multitude of review comments (PR-synchronize events will have to discard stale reviews from prior workflow runs). This can also be done for pushed commits 😉

Getting line number, file paths, and suggestions from clang-tidy & clang-format can be done, but it would take some extra dependencies. Clang-format can output suggested fixes in XML (only to stdout), and clang-tidy can output fix suggestions to a specified YAML file. Again, I need to investigate the best course of parsing these outputs from bash script.