October 2025: Delivered a new TSP GetSnapshot Request Handler for the facebook/pyrefly repo, enabling clients to query the current world state via a snapshot version. Snapshots are refreshed on significant events (e.g., file changes or rechecks) to ensure clients access the latest state, improving consistency and reliability.

September 2025 monthly summary for facebook/pyrefly. Key feature delivered is the Type Server Protocol Version Query Handler, adding a handler for typeServer/getSupportedProtocol with full infrastructure and accompanying tests. Commit reference: 63c9b921fe838f23ab62b371f955c2b4c7852ab2. No major bugs fixed this month. Overall impact: improves TSP interoperability, lays groundwork for future protocol features, and enhances reliability for clients querying supported protocol versions. Technologies/skills demonstrated include Python-based API handler design, test-driven development, and adherence to repository standards. Business value: accelerates client integrations and reduces risk by validating version compatibility early.

Delivered Type Server Protocol integration in Pyrefly by introducing a dedicated tsp_types crate for TSP type definitions and utilities, enabling structured TSP requests/responses in language-server workflows. Added a command to run a TSP server and upgraded TSP to v0.2.0, positioning Pyrefly for broader language-server interoperability and easier onboarding for contributors.