February 2026: Focused on expanding runtime compatibility for PostHog JS. Delivered Edge Runtime Compatibility Enhancements by adding an /edge subpath export to opt into edge builds and refactoring the AI module to remove static Buffer imports, enabling execution in edge runtimes (e.g., Cloudflare Workers, Vercel Edge Functions). No separate major bug fixes were reported this month; instead, we addressed runtime blockers to broaden adoption and improve build stability. Business impact: broader reach for edge deployments, reduced bundling/runtime errors, and a smoother upgrade path for customers leveraging edge environments. Technologies: JavaScript/TypeScript, Node.js vs Edge runtimes, edge-friendly Web APIs (TextEncoder/TextDecoder), changesets.

January 2026 performance highlights focusing on cost-aware telemetry and TTFT instrumentation across Python and JavaScript SDKs. Delivered provider usage metadata for backend cost calculations, improved data integrity through serialization enhancements, and robust tests in Python; added cross-provider TTFT tracking, code organization improvements, and tests in JavaScript. These changes increase cost accuracy, provider-usage visibility, and performance metrics for AI interactions, enabling data-driven optimization and faster issue detection.