The Matrix Conference 2026

Matrix already provides the essential primitives for a decentralized calendar: room memberships, federated state exchange, spaces, and support for custom event and room types. This session explores the technical integration of RFC 8984 (JSCalendar) within the Matrix protocol. We will examine how the JSON-based representation of JSCalendar can be mapped to Matrix state events and what pieces are missing. The presentation concludes with a live demonstration of a working prototype within Tammy.

A notification seems simple: a message arrives, and the phone vibrates. But in the Matrix ecosystem, a single "ping" triggers a complex chain of events involving E2EE decryption, push rule evaluation, and state synchronization. This talk dives into the architectural challenges of implementing a robust, privacy-respecting, and energy-efficient notification engine in Trixnity.