There is such an open source system: https://github.com/clarkerubber/irwin https://github.com/clarkerubber/irwin. It seems that the last commit was some years a

There is such an open source system: https://github.com/clarkerubber/irwin https://github.com/clarkerubber/irwin. It seems that the last commit was some years ago, so it's either very stable or no longer used. At any rate, this is what powers anticheat on lichess.org.