I watched a video recently on malicious code injection into OSS repo PRs and how they can go undetected because of how well they're hidden and decided to do a project for this. This tool is essentially used in unison with ai code review bots like greptile. While tools like greptile reason because they run with LLMs, this is a deterministic step before greptile that scans for malicious code (command execution, credential access, exfil, auto-run hooks, obfuscation, and prompt injection; regex + semgrep, no LLM), then can trigger the ai code reviewer like greptile or coderabbit, pointing it to its findings.
It's free/MIT and runs in your CI.