October 2025 performance summary: Delivered real-time data capabilities and hygiene improvements across MetaMask/core and metamask-extension, enabling faster feature delivery and greater reliability for users. Key outcomes include a WebSocket-based core-backend with real-time activity and balance updates, lifecycle management, performance tracing, and robust reconnection handling, along with targeted fixes to race conditions and reconnection logic. Release/versioning hygiene across the monorepo improved tag consistency and release metadata, and test stability for BackendWebSocketService was enhanced by making backoff deterministic. In the extension, core-backend upgrade to 3.0.0 modernized the WebSocket service API and aligned dependencies, setting the stage for simpler future upgrades and policy compliance.

September 2025 Monthly Summary – MetaMask/core Overview: Delivered a performance-focused enhancement to TokenBalances polling that optimizes per-network behavior by making polling intervals adaptive based on per-chain dynamics and WebSocket connectivity, with an opt-in, backward-compatible design. The update includes an assets-controllers package upgrade (74.3.3) with changelog and yarn.lock updates, and aligns with the 534.0.0 release cycle.