May 2025 highlights: focused on stabilizing configuration workflows, expanding language-diagnostic support, and improving onboarding. Delivered robust Mypy config migration with per-module INI/TOML subconfigs and enhanced serialization; integrated Pyright diagnostics translation and execution environments; improved init flow with migration warnings and a basic init config; expanded and reorganized documentation for error kinds and migrations, and re-enabled migration docs in the sidebar. These changes increase reliability and speed of configuration adoption, improve diagnostic coverage, and reduce support overhead for developers using pyrefly with Mypy and Pyright.

April 2025 highlights for ndmitchell/pyrefly: delivered robust configuration tooling, automated discovery, and a streamlined initialization/migration flow. Improvements across mypy/pyright config parsing, pyproject handling, and config normalization reduce onboarding time, prevent misconfigurations, and enable safer migrations across projects. Included targeted bug fixes, reliability enhancements, and documentation/assets updates to support secure and consistent deployments.

March 2025: Delivered a cohesive, multi-repo effort to improve error reporting, diagnostics, and type-checking resilience in pyre-check and pyrefly. Focused on robust error kinds, centralized ErrorKind handling, annotation safety rules, CLI error summarization, and TypeCheckContext enhancements, delivering business value through improved developer and user feedback, earlier issue detection, and maintainability.