Alexis Challande

We added post-quantum cryptography support to pyca/cryptography, the eleventh most-downloaded Python package on PyPI, putting quantum-resistant ML-KEM and ML-DSA algorithms one pip install away for the entire Python ecosystem.

We improved YAML anchor support in zizmor and tested it against 41,253 real-world GitHub Actions workflows from high-value open-source projects.

See how we slashed PyPI’s test suite runtime from 163 to 30 seconds. The techniques we share can help you dramatically improve your own project’s testing performance without sacrificing coverage.

We developed a simple CodeQL query to find denial-of-service (DoS) vulnerabilities in several high-profile Java projects.